NBSIR 78-895

EARTH TERMINAL MEASUREMENT SYSTEM

MAINTENANCE MANUAL

John P. Wakefield

Electromagnetic Fields Division

National Engineering Laboratory

National Bureau of Standards

Boulder, Colorado 80303

September 1978

Equipment developed for

Commanding General

U.S. Army Communications Command

Fort Huachuca, Arizona 85613

NBSIR 78-895

EARTH TERMINAL MEASUREMENT SYSTEM

MAINTENANCE MANUAL

John P. Wakefield

Electromagnetic Fields Division

National Engineering Laboratory

National Bureau of Standards

Boulder, Colorado 80303

Equipment developed for

Commanding General

U.S. Army Communications Command

Fort Huachuca, Arizona 85613

September 1978

U.S. DEPARTMENT OF COMMERCE, Juanita M. Kreps, Secretary

Sidney Harman, Under Secretary

Jordan J. Baruch, Assistant Secretary for Science and Technology

NATIONAL BUREAU OF STANDARDS, Ernest Ambler, Director

PREFACE

This manual is organized into ten sections. The first four sections

present information related to the overall system. Each of the other

sections, 5 through 9, is an instrument instruction manual for a particular

unit. Section 10 contains information on the inter-connecting cables.

NOTICE

"Certain commercial equipment, instruments, or matertials are identified

in this paper in order to adequately specify the experimental procedure. In no case does such identification imply recommendation or endorsement by the

National Bureau of Standards, nor does it imply that the material or equipment identified is necessarily the best available for the purpose."

iii

EARTH TERMINAL MEASUREMENT SYSTEM

MAINTENANCE MANUAL

TABLE OF CONTENTS

Page

ABSTRACT 1

1. GENERAL INFORMATION 3

1.1 Introduction 3

1.2 Software 3

1 . 3 Hardware 5

1.4 Specifications 5

1.4.1 System Specifications 5

1.4.2 Individual Unit Specifications 8

2. INSTALLATION AND OPERATION. 9

2.1 Introduction 9

2.2 Unpacking and Inspection 9

2.3 Initial Installation 11

2.3.1 ETMS Control/RF Checkout 12

2.3. 1.1 Manual Control 12

2.3. 1.2 Calculator Control 14

2.3.

1.3 RF Circuitry Checkout 15

2.3.

1.4 Power Detector Checkout 16

2.3.2 Temperature/Dew-Point Monitor Checkout ....... 17

2.3.3 Equipment Performance Checkout 18

2.4 New Site Equipment Setup 19

2.4.1 Introduction 19

2.4.2 Unpacking and Hookup 19

2.4.2. 1 Unpacking 19

2. 4. 2.

Power-Up 20

2. 4. 2.

Temperature/Dew-Point Probes 20

2.4.3 Installation of Noise-Add Standard ... 21

2.4.3.Positioning the Noise-Add Standard .... 21

2.4.3. 2 Control Room Cables 22

2.4.4 ETMS-IF Patch Panel Connections. . 23

2.4.5 Equipment Checkout on Station 23

3. THEORY OF OPERATION 24

3.1 Introduction 24

3.1.1 Measurement Description 24

3.2 Description of System Equipment 25

3.3 General System Theory 26

3.3.1 Control/RF Unit 26

3.3.2 Power Detector Module 27

3.3.3 Digital Voltmeter 27

3.3.4 Analog Multiplexer 28

3.3.5 Temperature and Dew-Point Meters 29

3.3.6 X-Band Dual Noise-Add Standard 29

3.4 System Control Circuits. . 30

3.4.1 Control Signals 30

3.4.2 Offset Voltage Control 32

3.4.3 Noise-Add Control 32

v
3.5 System Flag Circuits 33

3.5.1 ETMS Control/RF Console Flags 33

3.5.2 DVM Data-Ready Flag 33

3.5.3 Clock Data-Ready Flag 34

3.6 System Data Circuits 34

3.6.1 Control Data Paths 34

3.6.2 Digital Voltmeter Data 34

3.6.3 Date and Time Data Paths 35

3.7 Input-Output Interfaces 35

4. SYSTEM TROUBLESHOOTING 37

4.1 Systematic Approach 37

4.1.1 Preliminary Evaluation 37

5. ETMS CONTROL/RF: INSTRUCTION MANUAL 41

5.1 Introduction 41

5.2 Specifications 41

5.3 RF Circuits 43

5.3.1 Input Circuits 43

5.3.2 First Amplifier 45

5.3.3 Attenuator Module 45

5.3.4 Second Amplifier 45

5.3.5 Monitor and Output Circuits 45

5.3.6 Star Simulator Circuits 46

5.4 Control and Flag Circuits 46

5.4.1 Control 46

5.4.2 Ready Flags 47

5.5 Power Distribution 47

5.6 Digital Circuit Description 47

5.6.1 Z 700 Control Card 47

5.6.2 Z 400 Switch Driver Card 50

5.6.3 Z 500 RF Level Processor Board 53

5.6.3.

1

Adjustments of RF Level Processor 53

5.7 Simulated Star Noise Sources 55

5.8 Troubleshooting the ETMS Control/RF Unit 55

5.8.1 RF Signal Diagnostics 56

5.8.2 Control Circuitry Diagnostics 56

5.8.3 Ready-Flag Diagnostics 56

5.9 Parts List—Ccntrol/RF Unit 57

5.10 Wiring List 73

5.11 ETMS Drawings 7y

6. MULTIPLEXER/ DIGITAL VOLTMETER CONTROLLER 94

6.1 Introduction 94

6.2 Specifications 94

6.3 Y 100 MUX/ DVM Control Card 94

6.4 Y 200 Offset Reference Voltage Card 96

6.4.1 Digital Circuits 96

6.4.2 Reference Voltage Circuits 98

6.4.3 Adjustment Y 200 Offset Voltage Reference 98

6.5 Y 300 Input Channel Multiplexer 100

6.5.1 Control Circuits 100

6.5.2 Analog Multiplexer 100

6.5-3 Multiplexer Input Channel Assignments 100

vi
6.6 Troubleshooting. . 101

6.7 Parts List-MUX/DVM Controller 102

6.8 Wiring List 112

6.9 Drawings 119

7. POWER DETECTOR INSTRUMENT MANUAL 131

7.1 Description 131

7.2 Specifications 131

7.3 RF Power Detector Mount 131

7.4 NBS Type IV Power Meter 131

7.5 Parts List 133

7.6 Wiring List 134

8. CLOCK AND TEMPERATURE/ DEW-POINT INSTRUMENT MANUAL 135

8.1 Introduction 135

8.2 Specifications 135

8.3 Digital Clock 135

8.4 X3 Clock Inhibit/Flag Card 137

8.4.1 Troubleshooting 137

8.5 XI Temperature/Dew-Point Sensors 137

8.5.1 Alignment of Temperature Sensor 138

8.5.2 Alignment Dew-Point Sensor 139

8.5.3 Troubleshooting. 139

8.6 X-2 Temperature/Dew-Point Power Supply 140

8.7 AC Power Distribution 140

8.8 Parts List-Clock/ Temperature/Dew-Point 141

8.9 Clock Wiring List 150

8.10 Drawings 157

9. NOISE-ADD STANDARD & POWER SUPPLY INSTRUCTION MANUAL 170

9.1 Introduction 170

9.2 Specifications 170

9.3 Noise-Add Module 170

9.4 Noise-Add Power Supply . 172

9.5 Troubleshooting 172

9.6 Parts List - Noise-Add Unit & Power Supply 173

9.7 Drawings 181

10. INTERCONNECTION CABLES 191

10.1 Cable List . 191

10.2 Cable Wiring List 193

ACKNOWLEDGMENTS. ....... .. ..... 201

REFERENCES 202

APPENDIX A: SPARE PARTS AND SUPPLIES 203

APPENDIX B: PARTS LIST MANUFACTURER’S CODE TABLE 204

APPENDIX C: CONTROL CODES 211

vii
Figure 1 . Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Figure 19.

Figure 20.

Figure 21.

Figure 22.

Figure 23.

Figure 24.

Figure 25.

Figure 26.

Figure 27.

Figure 28.

Figure 29.

Figure 30.

Figure 31.

Figure 32.

Figure 33.

Figure 34.

Figure 35.

Figure 36.

Figure 37.

Figure 38.

Figure 39.

Figure 40.

Figure 41.

iv

LIST OF FIGURES

Page

ETMS System Equipment

Block Diagram of Earth Terminal and ETMS

System Control

Interface Signal Assignments

Flag Handshake Timing

ETMS Control/ RF Unit

ETMS Control/RF Unit RF Section

Z400 Schematic Circuits

Z400 PC Assembly Drawing

Z500 Schematic Circuits

Z500 PC Assembly Drawing

Z700 Schematic Circuits

Z700 PC Assembly Drawing

Z600 Block Diagram

Front Panel Wiring

Rear Panel Wiring

Control/RF Unit Primary Power Distribution

Multiplexer/DVM Unit

Data Flow-DVM

Y100 Schematic Circuits

Y100 PC Assembly Drawings

Y200 Schematic Circuits

Y200 PC Assembly Drawing

Y300 Schematic Circuits

Y300 PC Assembly Drawing

Power Detector Unit

Clock and Temperature/Dew-Point Unit . . X3 Schematic Circuits

X3 PC Assembly Drawing

XI Schematic Circuits

XI PC Assembly Drawing

X2 Schematic Circuits

X2 PC Assembly Drawing

Clock/Temperature AC Power Distribution . Noise-Add Standard Unit

Noise-Add Schematic

V800 Noise-Add Constant Current Schematic

V800 PC Assembly Drawing

V900 Power Supply Schematic

V900 PC Assembly Drawing

System Interconnection Cables

24

31

36

39

42

44

79

81

83

85

87

92

93

95

97

119

121

123

125

127

129

132

136

157

159

161

163

165

167

169

171

181

183

185

187

189

192

viii
EARTH TERMINAL MEASUREMENT SYSTEM

MAINTENANCE MANUAL

By John P. Wakefield

This manual describes the equipment and maintenance procedures to support

the earth terminal measurements system (ETMS) developed by the National Bureau

of Standards for making measurements of earth terminal and satellite parameters

such as figure of merit (G/T), antenna gain relative to a reproducible reference

level, ratio of carrier power to the operating noise temperature (C/kT) , and

satellite effective isotropic radiated power (EIRP) . System equipment specifications, site set-up instructions, equipment theory of operation, troubleshooting and maintenance are included. This manual does not include measurement

theory nor measurement operating procedures that are described in the Earth

Terminal Measurement System Operation Manual.

Key Words: Earth terminal measurement system; effective isotropic radiated

power; figure of merit; noise temperature; satellite communication.
2

Figure

1.

ETMS

System

Equipment.
1 . GENERAL INFORMATION

1 . 1 Introduction

The Earth Terminal Measurement System (ETMS) is a portable automated measurement system (figure 1) developed around the NBS Type IV self-balancing power meter

[1], The system measures pertinent power ratios used in determining various

performance parameters of satellite receiving earth terminals.

The ETMS operates through the IF patch panel of the earth terminal. The

Power Measurement and Control Console measures the power received from the patch

panel and operates the remote rf solid-state noise source attached through a cross-guide coupler to the microwave front-end of the earth terminal as shown in

figure 2. All measurements are made in pairs, one measurement with the noise

source turned off and one measurement with the noise source turned on, and then

the two measurements are normalized by the difference between the two powers to

minimize the effects of gain variations of the earth terminal.

The measurement of Gain-Over-Noise Temperature (G/T) of an earth terminal

is accomplished by pointing the antenna to a radio-star (essentially a point

source) of known flux density, measuring the received power, and then pointing

the antenna to "cold sky" and again measuring the power. Normally, the larger

portion of the noise power "received" during the cold-sky measurement is generated by the "front-end" of the earth terminal. The G/T of the earth terminal

is calculated knowing the cold-sky contribution to the measurement and the

expected flux density of the star [2, 3, 4, 5, 6, 7].

1.2 Software

The software for the ETMS system consists of seven cassette tapes, four

containing programs for specific tasks: equipment checkout, site-data preparation, data acquisition, and data rework. There are three support tapes, one

of tabulated program variables, one of array variables, and one of special

functions. The ETMS Operator's Instruction Manual [2], (not part of this manual),

contains system operating instructions, including a sample input and printout

for each measurement task.

3
1 1

4

Figure

2.

Block

Diagram

of

Earth

Terminal

and

ETMS
i.3 Hardware

The ETMS unit consists of eight major components (figure 2): (1) The

noise-add standard source with its power supply, which is attached to the crossguide coupler at the antenna low-noise amplifier input; (2) the ETMS control/rf

console which plugs into the IF patch panel (this unit also requires two coaxial

cables which go up to the antenna rf-plate to remotely control the noise-add

source); (3) the power-detector unit which is a thermally-isolated commercial

thermistor mount and an NBS type IV power-meter; (4) the multi-channel input

digital-voltmeter which measures and digitizes the various measurement parameters and monitor voltages in the system; (5) the clock which provides time

information to the calculator for predicting star locations; (6) temperature/dew

point monitor for calculating water absorption corrections to the star flux,

(the temperature and dew point sensors are attached to 30-meter (100-ft) cables

so that they may be located outside to monitor outside ambient conditions);

(7) the calculator with its printer which provides the operator control interface, control of the measurement process, and calculations of the measurement

data; and (8) a cassette memory for storing measurement data.

1.4 Specifications

Introduction:

The various units of the ETMS systems will operate over different frequency

ranges and power levels, so specifications are given for the overall system.

The specifications for each individual unit are given in the section pertaining

to that particular unit.

1.4.1 System Specifications

General system specification size : The ETMS is transported in six (6) foamrubber lined fiber glass transit cases each weighing between 25 and 35 Kg (55

and 75 pounds). Total shipping weight of system is approximately 210 Kg

(460 pounds) . These transit cases provide an easy shipping method by air freight and

protect the units against damage.

5
Power requirements : The ETMS system will operate on either 50 or 60 Hz power

line frequency and can be switched to operate from 115 VAC or 230 VAC. The

system will operate on a reduced input voltage down to approximately 200 V at

either 50 or 60 Hz. System power consumption at 60 Hz is 500 W.

Control/RF Unit : The control/rf unit houses the control and switching circuits

to operate the system from calculator commands; the rf circuitry, input attenuator, band-pass filters, programmed attenuators and precision attenuators; rf

amplifiers; rf level monitor and alarm; and an internal simulation noise source

for verifying system performance.

RF input frequency: The ETMS includes four filters for 30 MHz, 2.5 MHz B.W.;

70 MHz, 5.5 MHz B.W., 2.5 MHz B.W., and 1.3 MHz B.W.; and also permits wideband operation. Wideband operation is useful when an external filter is used

for establishing system bandwidth or when measuring a known cw signal.

Actual cw and noise bandwidths are:

Selected Bandwidth cw Bandwidth Noise Bandwidth

Wide Band 10-200 Hz Undefined

30 MHz/2.5 2.5 MHz 2.8 MHz

70 MHz/5.5 5.6 MHz 5.4 MHz

70 MHz/2.5 2.6 MHz 2.65 MHz

70 MHz/1.0 1.4 MHz 1.26 MHz

Input power level: The input rf power is from 0.2 microwatts to 10 milliwatts.

The ETMS input is a 0-70 dB attenuator followed by approximately 30 dB of

amplification. The optimum power detector level is between 200 and 1000 microwatts for most accurate measurements.

Input impedance: The impedance of the rf input is 50 ohm.

Output impedance: The rf output port impedance is 50 ohms.

RF level meter: The centerscale zero-reading on the rf level meter represents

approximately 500 microwatts (-3 dBm) at the detector when operating at 70 MHz.

The meter scale is approximately 1 dB per division.

6
Simulated noise source: The ETMS control/rf unit includes a simulated noise

source for testing ETMS system performance without connecting to an earth

terminal. The frequency spectrum is approximately 10 to 100 MHz uncalibrated

output level. This simulation source incorporates three noise generators,

two which simulate the noise-add standard and the third which is manually

adjustable over an eleven dB range.

Noise-Add Standard : The dual diode noise-add standard is a solid-state microwave dual noise source with its companion power supply. This unit is attached

to the antenna port, through a directional coupler, to inject a known noise

signal into the earth terminal receiver under ETMS calculator control.

Dual diode noise-add standard: The 7.0 to 7.4 GHz frequency noise-diode output

level is approximately 300,000 K with both diodes on. Diode No. 1 is approximately 3 db less than diode No. 2.

Noise-add current supply: This external module contains a long-term stability

voltage reference which is used to determine the constant-current to each

noise-add diode.

Input power: 115/230 V 50/60 Hz.

Input control: Two coaxial lines from ETMS control console.

Power Detector Unit : The rf power detector unit is a thermister type rf

detector which is in a thermally isolated enclosure, and an NBS type IV power

meter. The output of the power meter is a dc voltage which can be measured

with a digital-voltmeter.

DVM and Analog Multiplexer Unit : This unit provides eleven (11) input channels

to the digital voltmeter for digitizing the various dc voltages involved in the

equipment verification and measurement operation of the ETMS. One channel is a spare which can be used as an auxiliary input to the DVM. This module also

houses the voltage-offset reference generator used to enhance the rf power

measurement.

7
Time, Temperature and Dew Point Unit : This unit houses the system clock and

temperature monitor circuits.

Time: The clock is a commercial module with a crystal time base. The

unit has a power-outage, clock-failure signal that is used to initiate

a program warning message. (See manufacturer's instruction manual.)

Date: Month and date information to calculator are input on the thumbwheel switches on the front panel.

Temperature monitor: The temperature monitor is a thermister sensor

type meter, with a range of 0 to 100° F [10]. Extended ranging is available

on the DVM reading only.

Dew point monitor: The dew point monitor is a heated lithuim-cloride

element containing a thermister sensor type meter, range 12° to 96°F [10].

(See manufacturer's instruction manual.)

100-ft extension cables are supplied to remotely locate the temperature and

dew point sensors to monitor outside conditions.

Calculator Control Unit : The calculator provides the automatic control and

sequencing to operate the ETMS system. The functions are: keyboard input,

thermal printer output, cassette tape program, and data storage. The software

is in BASIC programming language. Four input/output channels are provided for

instrument interfaces (see manufacturer's instruction manual).

1.4.2 Individual Unit Specifications

Refer to each respective equipment section of this manual for particular

specifications for each unit.

8
2. INSTALLATION AND OPERATION

2 . 1 Introduction

Installation procedures are usually performed on arrival at each site.

In short, this amounts to first unpacking the system units; calculator, printer,

external cassette unit, coutrol/'rf unit, DVM, power detector and clock, then

interconnecting the various cables between units, verifying that the power line

supply voltage selectors and fuses match the available power, turning on the

system, and running the equipment check-out program.

2 . 2 Unpacking and Inspection

Figure 1 is a photograph of the units of the ETMS system. The system is

shipped in six (6) transit cases labeled as follows:

Box No. 1 - Calculator

Box No. 2 - Printer

Box No. 3 - EMTS control/rf unit

Box No. 4 - DVM

Box No. 5 - Clock & power detector

Box No. 6 - Supplies & spare parts

Itemized lists of the contents of each case provide a guide for repacking

equipment for transit.

Packing list:

Box No. 1 - Calculator

Calculator with special keys template attached

ac power cord

Tall dust cover for calculator

Box No. 2 - Printer

Thermal printer

Printer I/O cable (interface cable)

ac inter-connect power cord

9
Box No. 3 - ETMS control/rf unit

control/rf unit ac power cord

5-short BNC cables

2-cype N cables

1-

IF patch panel to type "N" adapter cable

2-

6 meter (20 ft) BNC cables

2-90 cm (3 ft) BNC cables

Box No. 4 - DVM

DVM with input multiplexer

2-

ac power cords

1-1/0 cable (rf unit)

1-1/0 cable (clock)

1-1/0 cable (DVM)

1-1/0 cable (cassette unit)

1-control cable (rf to DVM)

3-

analog cables

a) rf/control cable

b) power detector cable

c) temp/dew point cable

1-DVM top cover (under foam padding)

Box No. 5 - Clock/Power meter

Clock & temperature-dew point meter

Power detector

External cassette memory

Dual diode noise-add standard

1-

SMA/Type MN" simi-rigid line

Noise-add power supply

Hydrometer (temp/humidity)

4-

ac power cords

2-

SMA noise-add supply cables

Box No. 6 - Supplies & Spare Parts

Temperature/dew point probe enclosure

3 cartons printer paper (6 rolls)

2 cartons cassettes (20 cassettes, program

and data tapes)

10
Spare parts - 1-NBS type IV power meter

1-rf power thermister mount

1-misc components and printed circuit boards

ETMS Accessories:

The manufacturer’s accessory packages and instruction manuals for the

various equipment are shipped under separate cover to facilitate item check-out

upon initial delivery. Some of them will be incorporated into the system transit

cases while others probably will not be needed "on the road.”

2 . 3 Initial Installation

After unpacking the system and visually checking for damage, check the

position of the 115/230 V selector card in the ac power receptacle for each

instrument to make sure it is set to the proper power line voltage. The

selected voltage setting is visible beneath the fuse cover. Connect the calculator, printer, and external cassette unit and proceed

through the manufacturer’s performance check-outs as directed in the individual

manufacturer’s instruction manuals. The calculator accessories include a calculator user’s training tape, if needed, in addition to the performance

test tape.

Clock Check-out:

When satisfied with the calculator’s and peripheral’s operation, connect

the clock I/O cable and set the time and date. Type the following commands on

the calculator keyboard:

Type "ENTER (3,*) M,T"

Press "EXECUTE" key

Type "DISP M,T"

Press "EXECUTE" key

11
The calculator display should show two numbers; the left one should be the

left (most significant) digit of the month and the right-hand number should be

the least digit of the month, the day of the month (2 digits) followed by the

time in hours (00 to 23), minutes, and seconds, all combined together as one

long number string. The decimal point should be between the minutes and seconds

e.g., December 14, 12:36:04 = 1 2141236.04.

Voltmeter Checkout:

Connect the digital voltmeter I/O cable. Turn on the digital voltmeter and

the input multiplexer power switch. Perform the instrument checkout listed in

the manufacturer’s instruction manual. Rotate the DVM rate control knob fully

counter-clockwise to the ext. position. Press the "output data" button and

release the "program control" button. Turn the mode selector to dc volts and

the range selector to auto range.

Type the following commands into the calculator:

Type "ENTER (2,*) M,V"

Press "EXECUTE" key

Type "DISP M, V"

Press "EXECUTE" key

The calculator should display a 9 (dc mode) and the right-hand number

should coincide with the voltmeter display reading.

2.3.1 ETMS Control/RF Checkout

2.3.1. 1 Manual Control

Connect the I/O cable from the calculator to the control/rf console, and

the interconnecting cable between control/rf console and DVM multiplexer, and

turn on ac power to all units.

12
Set each of the control codes In biliary (1,2,4,8,16,32, and 64 code) into

the programming switches on the front of the control/rf unit, press the "load"

button and check for the conditions listed in the table below.

The complete list of control codes used by the calculator is given in

Appendix B.

Control Code Switches Up Results On Indicator Lights

48 32+16 15 dB Programmed Attenuation

63 32+16+8+4+2+1 0 dB Programmed Attenuation

62 32+16+8+4+2 1 dB Programmed Attenuation

61 32+16+8+4+1 2 dB Programmed Attenuation

59 32+16+8+2+1 4 dB Programmed Attenuation

55 32+16+4+2+1 8 dB Programmed Attenuation

66 64+2 Standard Attenuator In

67 64+2+1 Standard Attenuator Out

68 64+4 rf Off

69 64+4+1 rf On

82 64+16+2 Noise ADD #1 On

83 64+16+2+1 Noise ADD //I Off

84 64+16+4 Noise ADD #2 On

85 64+16+4+1 Noise ADD #2 Off

13
The following codes control digital voltmeter functions. Press in the

"program" button on the DVM and execute the control codes via the programming

switches on the ETMS control/rf unit.

Control Code Switches Up Results On Indicator Lights

Input Channels

111 64+32+8+4+2+1 Input Channel 0

no 64+32+8+4+2 Input Channel 1 109 64+32+8+4+1 Input Channel 2

107 64+32+8+2+1 Input Channel 4

103 64+32+4+2+1 Input Channel 8

100 64+32+4 Input Channel 11

DVM MODES

33 32+1 dc Volts/w Filter

32 32 dc Volts/w Filter

DVM Ranges

27 16+8+2+1 0.1 Volt Range

28 16+8+4 1 Volt Range

29 16+8+4+1 10 Volt Range

30 16+8+4+2 100 Volt Range

31 16+8+4+2+1 1000 Volt Range

24 16+8 Auto Range

2.3. 1.2 Calculator Control

After checking the control functions listed in the tables above, output the same commands from the calculator by performing the following sequence:

First, set the output format of the calculator by entering one line of

program into the calculator by typing "10 FORMAT B" on the keyboard. Then press

the "END OF LINE" key.

Now, each of the control codes in the tables above may be executed from the

calculator by typing "WRITE (4,10) WBYTEXX; " Where XX is the control code
listed in the table. Then press the EXECUTE key. Note: The semicolon on the

end of the direct command above must be included or the calculator waits for an end-of-message flag signal from the instrument and none is generated by this

equipment, only a "command completed" flag is returned.

When the EXECUTE key is pressed, the instrument should respond with the

results listed in the table. Check each command in the table by repeating the

"WRITE (4,10) WBYTEXX; " and EXECUTE for each of the command codes.

The "RECALL" key can be used to avoid retyping the WRITE statement in

repeatedly. Refer to the calculator instruction manual as to the use of the

RECALL and editing keys.

This completes the preliminary checkout of the control circuitry.

2.3. 1.3 RF Circuitry Checkout

Set up the following conditions on the control panel:

a. Manual attenuator (input) set to 60 dB.

b. Connect the simulated noise output coax cable to the input, if not

already connected.

c. Execute the command code 65 either from the front panel program switches

or through the calculator keyboard as described in the previous section.

Command code number 64 switches the standard attenuator in and turns the

rf to the power detector "OFF."

d. Set the programmable attenuator to "zero" dB by executing command code

63 as above.

e. Turn the simulated noise-add "OFF" by executing command code 81.

f. Set the hold-bypass switch to the bypass position.

g. Set the meter range selector to XI.

h. Select the 70 MHz/5.3 MHz bandwidth filter on the filter selector

control.

i. Set the simulated STAR level attenuator to 3.5 dB.

Adjust the manual input attenuator to increase the input signal (noise)

level until the signal level meter reads approximately -3.0 by reducing the

manual input attenuator. This should be around 20 dB input attenuation.

15
Turn each noise-add source on and off using command codes 83 and 82 (NA//1),

respectively, or 85 and 84 (NA#2), noting that the signal level meter indicates

an increase or decrease in signal. Noise-add //I is a smaller signal than

noise-add #2.

Verify the operation of the programmable attenuator and the standard attenuator by observing the change in level on the meter when each of the following

control codes are executed (either manually or through the calculator keyboard).

Control Code

62

61

59

55

63

66

67

Overload trip & warning:

Action

Programmable Attenuator = 1 dB

Programmable Attenuator = 2 dB

Programmable Attenuator = 4 dB

Programmable Attenuator = 8 dB

Programmable Attenuator = 0 dB

Standard Attenuator "IN" (6 dB)

Standard Attenuator "OUT" (0 dB)

Decrease the input attenuator while observing the signal increase on the

level meter. The overload light should turn on and the warning buzzer sound

when the meter reads approximately + 8 to + 10 dB.

Adjust the input attenuator to reduce the input signal; then press, the

overload reset button to reset the overload monitor and silence the buzzer.

Readjust the input attenuator for a mid-scale (zero) reading on the meter. Set

the meter range selector to X 0.1 and adjust the meter offset knob to return the

meter to approximately mid-scale.

Vary the simulated star attenuator noting the signal level change on the

meter. The meter scale will be approximately 0.1 dB per small division.

Move the meter range selector to X 0.01 again adjusting the meter offset

knob to midscale. Varying the simulated star attenuator should provide a signal

level change of approximately 0.01 dB per small division. Return the meter

range selector to the X 1 position.

I 1

;

i 2 . 3 . 1 . 4 Power Detector Checkout

I

P

; 3 Connect the ac power cord to the power detector unit after selecting the

correct line voltage setting and fuse for the power line. Note: Make certain

L 16
the ground selector switch on the back panel of the unit is in the ungrounded

position, and that the bolometer cable is connected. On the front panel, check

that the inter-connect links are not connected and that the 100 ft/remote/200 ft switch is in the 200 ft position (this switch is blocked in the 200 ft position

on some models). Turn "ON" the ac power switch on the front panel of the

power detector unit.

The meter should move up to about mid scale. Connect the analog voltage

cable (J364) between the power detector and the voltmeter. Connect the type "N"

coaxial cable between the control/rf unit and the power detector.

Adjust the input manual attenuator for approximately + 3 reading on the rf

LEVEL METER on the control/rf unit. While alternately using control codes 69

and 68 (rf "ON" and rf "OFF"), observe that the reading on the current meter on

the power detector changes a definite but very small amount.

Execute control code 103 (64+32+4+2+1) either manually or through the

calculator keyboard to select DVM input channel 8 (power detector voltage).

Execute control code 68 (rf OFF) last.

Set the DVM range selector to auto-range and the rate knob fully clockwise

(free-run). Release the program button on the DVM. The DVM reading should be

between 2.2 and 2.6 volts depending on the temperature of the power detector

unit.

2.3.2 Temperature/Dew-Point Monitor Checkout

Caution:

The lithium cloride bobbin for the dew-point temperature probe is stored in

a sealed test tube containing a drying agent. When in operation, the dew-point

instrument heats the moisture absorbing bobbin to establish an equilibrium.

When not heated, the bobbin will absorb moisture and in some instances can overheat and burn out when turned back on. For this reason the bobbin is kept

dry by storing it in the sealed test tube with the drying compound. Refer to

the manufacturer's instruction sheet included with the instruction manual for

further information.

Unplug the dew-point probe, carefully remove the lithium-cloride bobbin

from the dry test tube being careful not to touch the wicking material, and

install the bobbin onto the dew-point probe. Replace the probe shield and

plug the probe cable back in. After about thirty minutes the dew-point reading

and DVM reading will indicate actual dew-point temperature.

17
Connect the temperature and dew-point probes to the chrono-met unit and the

analog cable J656/J356. Within a few minutes, the temperature meter should

indicate the probe temperature in degrees Fahrenheit. Executing control code

110 (DVM input channel 1) should read approximately the same temperature reading

in millivolts times 10. The dew point should indicate between 0 and 50° F. depending on the probe temperature. Executing control code 109 (DVM input

channel 2) should cause the DVM to read the indicated dew-point temperature

in millivolts times 10.

2.3.3 Equipment Performance Checkout

The previous section described individual manual checks on each piece of

equipment. In the system performance check, the equipment check program

(cassette //l. Equipment Check) is loaded into the calculator and the operation

of all the functions and the quality of the performance of the entire system is

tested. This program is the equipment check, which is performed first each time

a setup is made at a new site. It can also be used as a troubleshooting aid.

Place the tape labeled Equipment Check in the cassette transport on the

calculator keyboard. Rewind the tape if necessary. Turn the calculator power

switch off for a few seconds and then back on. Press the LOAD key then the

EXECUTE key. The calculator will load in the program from the tape. After the

calculator has loaded the program ([— showing on the calculator display), press

the RUN key and then the EXECUTE key. The program will begin execution and

will request location of input data tape after a minute. Type 10 on the

keyboard, then press the EXECUTE key; the calculator will load several data

files off the cassette and begin execution of the program. Proceed through

the equipment check program following the instructions described in the ETMS

Operator’s Manual.

On completion of these tests the ETMS system is operational in the simulated mode.
2 . 4 New Site Equipment Setup

2.4.1 Introduction

The ETMS equipment is normally shipped to an Earth Terminal site in the

six transit cases. This section of this manual presents assembly of the system,

connection to the earth terminal, and performance checkout routines assuming

that the ETMS system was fully functional when it was packed for shipping.

The normal procedure is to unpack and set up the equipment, execute the equipment check program recognizing that the units are cold, and then allowing the

system to warm up and stabilize for at least 24 to 36 hours before attempting to

make measurements.

2.4.2 Unpacking and Hookup

2. 4. 2.1 Unpacking

The ETMS can be set up on a small table adjacent to the IF patch panel

and within sight of the antenna control console. Figure 1 shows a convenient

arrangement of the ETMS equipment.

Unpack the control/rf console, DVM, power detector and clock units. Be

sure that the proper power-line voltage is selected on each unit. Note that the

DVM unit has ac line voltage selectors on both the input multiplexer and the

DVM. Connect the ac power cords but do not turn the equipment "ON." Unpack the

calculator and printer, placing them beside the equipment, and check that the

printer has paper in it. Unpack the external cassette unit and check the ac line voltage settings of these three units. Connect the ac power cords to these

units. The printer and cassette unit can be powered from the calculator. Leave

all ac power off until the interconnecting cables are hooked up.

Connect the printer I/O cables (see figure 41), matching the jack numbers

on the equipment and cables. The four I/O cables can be plugged into the

calculator in any of the four locations.

Connect the control cable J352/J652 between the control/rf console and the

DVM; and the three analog cables between the DVM input channels and the control/rf

console, the power detector, and the chrono-met (clock) unit.

Connect the type N cable between control/rf console input and the power

detector; and the short BNC cable between the simulated noise output and the

signal input. Set the input manual attenuator to 70 dB attenuation. Be sure

19
that all the BNC connectors on the short cables on the front of the control/rf

console are properly connected. An intermittent signal cable can wipe out a set

of measurements.

Check that all control cable connectors are properly seated and locked.

2.4. 2.

2

Power-Up

Turn on all the ac power switches. Press the overload reset button on the

control/rf console if the overload alarm is tripped. Set the GMT date (number

of month and day) into the thumb-wheel switches on the front of the clock.

Switch the run/set switch on the clock to the "set" position and set the clock

to the GMT time using the seconds, minutes, and hours buttons. Restart the

clock by returning the set switch to the run position. The time should be

correct within one second of GMT time in order to track stars accurately.

The power-fail warning on the clock is automatically reset when the set

switch is moved to set.

2.4. 2.

3

Temperature/Dew-Point Probes

Unpack the temperature/dew-point probe enclosure and the probe extension

cables. There are three extension cables, two cables 15 meter (50 ft.), and one cable 30 meter (100 ft.) in length, all having the same pin connections. Connect the cables as needed to run from the temperature/dew-point meter to a location outside the building away from building air conditioners or heat

reflecting walls. Remove the dew-point sensor bobbin from its "dry" test tube

and install the bobbin on the dew-point probe in the enclosure. Replace the

bobbin shield over the probe and adjust the lid on the enclosure so that the air can circulate freely unless the weather includes gusty winds.

Hang or support the enclosure as high off the ground as possible after

connecting the extension cables.

Connect the respective cables to the temperature/dew-point meters. The

temperature meter should stabilize in a few minutes; however, the dew-point

meter may cycle for an hour before stabilizing.

The temperature meter display will go out of range if the outside temperature exceeds 100° F., however, the analog data to the DVM will still remain

valid. The temperature display can be internally switched to a higher range if

desired by opening the clock module. (See the temperature/dew-point instruction

manual)

.

20
The dew-point meter may go out of its operating range in very severe cold

weather. If this happens the temperature and humidity can be manually entered

into the calculator by placing the thermometer/hydrometer furnished with the

system up on the antenna base and monitoring it periodically.

2 . A . 3 Installation of Noise-Add Standard

The noise-add standard module is mounted in the antenna rf room near the

input to the low-noise amplifier where it can be connected to the input coupler

through a short semi-rigid coaxial line, and is controlled from the ETMS rf

console located in the earth terminal control room.

2. 4.3.1 Positioning the Noise-Add Standard

Locate the noise-add standard on a bracket or waveguide near the directionalcoupler at the input of the low-noise amplifier where the standard can be

connected to the pilot-inject or noise-add input of the directional coupler with

the short 45 cm (18 inch) semi-rigid coaxial line. Tape the noise-add module

securely with reinforced tape so that the semi-rigid coaxial line may be connected. The noise-add module must move with the low-noise amplifier as the

antenna changes elevation. Be sure that sufficient clearance exists.

Transfer the earth terminal receiver to the low-noise amplifier (PARAMP)

which will be tested;* disable the pilot detect warnings by switching to maintenance status and carefully disconnect the pilot-inject line from the directional coupler.

Unpack the short semi-rigid coaxial line and connect the noise-add standard

into the directional-coupler where the pilot line was removed. Note: If antenna

gain over a period of time is to be measured, an individual semi-rigid coaxial

line should be made for each antenna, and this semi-rigid line used only for

this particular antenna.

The noise-add standard is referenced through this line to the antenna so that every attempt possible must be made to keep the losses repeatable. This

*If the LNA with the pilot disconnected is switched out, the earth terminal

control logic may not switch back to the LNA automatically so that the switches

must either be manually switched or the pilot temporarily reconnected while

switching.

21
I

includes reducing wear and tear on the semi-rigid line and SMA connector by having

a line for each antenna; connecting and disconnecting the SMA connectors carefully

and as few times as possible; and minimizing bending and reshaping the semi-rigid

line. In other words, treat the semi-rigid line with TLC (tender, loving care).

Connecting the noise-add standard power-supply and remote cables: Unpack the

noise-add power supply and ac power cord, the two miniature coax cables having

SMA connectors, and the two, 90 cm (3 ft.) BNC cables.

Locate the noise-add power supply on a bracket where the SMA cables will

connect between the noise-add standard and the power supply, and the ac power

cord will reach a power outlet. Secure the power supply with tape after checking that all cables and modules have sufficient clearance in all antenna positions. Make sure the power supply has the correct supply voltage setting, turn

the switch off and connect the ac power cord and SMA cables. Note that the SMA

connectors are labled No. 1 and No. 2 on the respective ends.

Locate two coaxial lines running from the earth terminal control room to

the antenna rf room which can be used temporarily. For example, on the AN/FSC-78,

the frequency reference lines W103 and W203 for the 1 MHz and 5 MHz.

These are labeled Jll and J23 above the frequency control cabinet in the

control room and W7 on J7, W8 on J8 in the antenna rf room. Verify that these are the correct unused cables using an ohm meter. Connect the cables in the rf room to the noise-add power supply control J853 and J854 using the three-ft BNC

cables and coaxial adapters as needed.

Turn the ac power switch on.

2.4. 3.

2

Control Room Cables

Unpack the two, 6-meter (20-ft.) BNC cables and connect them between the

temporary lines and the ETMS control/rf console, Jacks J653 and J654. Observe

the low-noise amplifier output on the downlink spectrum-analyzer monitor.

Switch the noise-add diodes off and on to see that they are properly controlled

and that No. 2 is larger than No. 1. Execute program control code No. 81 in the

ETMS to turn off both noise-add diodes.

Note the noise level rise as noise diode No. 1 is switched on and off using

control codes No. 82 and No. 83. Then turn noise-add diode No. 1 off, control

code No. 83, then switch noise-add diode No. 2 on and off by executing control

codes No. 84 and No. 85. The rise in noise level from noise-add No. 2 should

22
be larger than the noise from No. 1. If not, interchange the two BNC cables at

J653 and J654 on the back of the ETMS control/rf console.

If neither or only one noise-add diode is working, recheck continuity of

the temporary control cables between the ETMS and the antenna rf room. Also,

verify that the downlink monitor is looking at the same low-noise amplifier to

which the noise-add standard is connected.

2.4.4 ETMS IF Patch Panel Connections

Unpack the IF patch panel to type N adapter cable and four-foot coaxial

type N cable. Turn the input attenuator on the ETMS to 70 dB and connect the

ETMS input to the selected down-connector IF patch. Switch the hold-bypass

switch to bypass. Set up the desired down converter frequency and phase-lock

control. Switch the ETMS filter selector to 5.3 MHz and then decrease the

input attenuation until the signal level meter reads about mid-scale 0 (-3 dBm)

.

Watch the signal level meter for each change as the noise-add standard is

switched off and on using control codes No. 80 (off), No. 83 (NA No. 1) and 84

(NA No . 2) (on)

.

2.4.5 Equipment Checkout on Station

Load the equipment check program if it is not already in the calculator and

proceed with the equipment/station checkout as described in the ETMS Operator's

Manual under equipment check (section 6.1).

23
3. THEORY OF OPERATION

3. 1 Introduction

This section describes the equipment which makes up the ETMS System hardware, the requirements on this equipment and evaluation of particular characteristics of the system. Theory of individual units are contained in later

chapters of this manual.

The measurement of the pertinent power ratios along with real-time star

location predictions is accomplished using a measurement system developed by

NBS and known as the earth terminal measurement system (ETMS). The ETMS is an automated measurement system developed around the most accurate power measurement instrument known—the NBS Type IV self-balancing power meter [1]. This

meter as implemented in the ETMS, measures the ratio of stable noise powers

to an accuracy of better than ± 0.1%.

3.1.1 Measurement Description

The ETMS system is a noise radiometer, capable of high-resolution rf power

measurements, which has been combined with a programmable calculator, a clock,

and a temperature/dew-point monitor. The calculator has been programmed to

automatically operate the radiometer. The system is used to measure the antenna

gain to system noise temperature ratio (G/T) of an earth terminal antenna

system. The program reads the time from the clock and calculates the predicted

pointing azmuth and elevation for the antenna toward a selected radio-star.

Then, as the earth rotates, the system records repeated measurement data of

received noise-power when the radio-star drifts through the beam of the antenna.

This "drift" routine is repeated five times with a different offset in declination angle each time, forming a set of data which cuts the radio-star into six

slices. One pass is offset a couple of degrees away from the star to a quiet area to establish a "sky background" noise-level.

The program then reprocesses these data using curve-fitting routines to

calculate the maximum intensity of noise power (star flux) at the center of the

star, even if none of the five cuts passed exactly through the center of the

star. The G/T ratio of the earth-terminal is evaluated using measured data on

the background noise temperature, including the receiver system noise and the

24
star-flux noise temperature as seen by the antenna. It also applies corrections

for atmospheric attenuation based on the temperature, dew point, and various

antenna parameters. Refer to the ETMS Operator's Manual for a rigorous analysis

of the measurement theory and procedures.

3. 2 Description of System Equipment

A simplified block diagram of the ETMS is shown in figure 2. The ETMS

contains eight subsystems: (1) the control/rf unit which provides signal con- ditioning, system test signals, precision programmable attenuators, signal

monitoring, alarm circuits, and interface circuits which allow the calculator to

control the various measuring instruments; (2) and NBS type IV self-balancing

power bridge used to measure noise power; (3) a dual X-band solid-state noise

source (noise-add) to provide a stable reference signal needed to eliminate the

effects of gain fluctuations in the earth terminal; (4) a programmable voltmeter

with an analog multiplexer (scanner) which connects the digital voltmeter to the

various measurement points of interest; (5) a temperature and dew-point monitor

with remote probes to measure the water content of the atmosphere at ground level;

(6) a digital clock to provide time information required to determine current

star coordinates; (7) a calculator which provides computation capability, and a means of controlling each of the remaining subsystems under automatic sequence

control, a keyboard to control the measurement procedures or to enter program

modifications, and a means of storing the measurement results on magnetic cas- sette tape in order to rework the data at a later time; and (8) an external

cassette memory which allows redundant recording of measurement data.

The Dual Standard Noise-Source (noise add) and its power supply are connected

at the input to the low noise amplifier through a directional coupler. The noiseadd control signals are brought up from the ETMS in the earth terminal control

room through two auxiliary coaxial lines. The remote temperature and dew-point

probes are suspended out near the base of the antenna and connected to the ETMS

with long extension cables. The ETMS input signal is picked off at the 70 MHz

IF patch panel in the earth terminal control room. The ETMS calculator displays

pointing azmuth and elevation angles which the operator sets on the earth

terminal control console. Then the calculator automatically measures and records

the received noise power as the star drifts through the antenna beam as the

earth rotates.

25
3.3 General System Theory

3.3.1 Control/RF Unit

The 70 MHz IF signal from the down connecter is applied to the input of

the ETMS control/rf unit through a level-set attenuator to adjust the input

level and then a band-pass filter to limit the bandwidth of the signal fed to

the amplifiers. A 3-dB attenuator (not shown in figure 2) isolates the input

of the first amplifier from the impedance variations of the filters. The

internal filters, which are selectable by a front panel control knob, are 70 MHz

center frequency with 1 MHz, 2.5 MHz and 5.5 MHz bandwidths or at 30 MHz center

frequency with 2.5 MHz bandwidth. A non-filtered wideband position is also

available. The signal path is brought out to the front panel so that an external

filter can also be connected.

The first low noise broadband (10-200 MHz) amplifier has 30-dB gain followed

by a 10-dB fixed attenuator (not shown) for a net gain of about 17 dB (including

the 3-dB input pad). A 0-15 dB programmable attenuator with high repeatability

is controlled by the calculator to maintain the signal at an optimum level. The

"6 dB reference attenuator" is switched in and out during the measurements and

the attenuation value of this step verified as a check on system linearity and

accuracy.

The second low noise broadband amplifier (10-200 MHz), which is padded

with 10-dB attenuation in its input (not shown), has a gain of 30 dB so. the net

gain is 20 dB. The + 20 volt dc supply voltage to the amplifiers is monitored on input channel No. 3 of the DVM so that any significant change in supply voltage

(which would effect amplifier gain) will be detected at setup time.

The output of the second amplifier is monitored through a directionalcoupler and crystal diode detector so that should a signal be high enough to

damage the power detector, the rf off/on coaxial relay (not shown) in the rf

output will be switched off, protecting the power detector.

The ETMS control unit provides a simulated star noise source and simulated

noise-add sources which can be connected to the signal input to simulate earth

terminal conditions, so that, with the exception of the X-Band Noise-Add Standard, the performance of the entire system can be checked out.
3.3.2 Power Detector Module

A commercial rf thermistor mount is used with the MBS Type IV dc substitution, self-balancing power meter to measure the noise power. The thermally

isolated thermister mount is a 200 ohm negative temperature coefficient unit

which detects rf power levels up to 10 rnW over the frequency range of 1 MHz to

1000 MHz.

The MBS Type IV power meter is a dc substitution type self-balancing

meter which will measure rf power ratios to better than 0.1% accuracy. The

output voltage of the meter is the dc voltage which appears across the thermister

element as the self-balancing action varies the dc current through the thermister

element (and therefore the heating energy) to maintain the element at 200 ohms.

As rf power is absorbed by the thermister, thereby heating it, the selfbalancing action decreases the dc power by an equal amount.

See the NBS Type IV Instruction Manual [8] and article [1] by N. T. Larsen

for a complete theory and operation for the type IV power detector.

3.3.3 Digital Voltmeter

The digital voltmeter is connected to a twelve-channel input multiplexer

(scanner) to measure various voltages of interest. Rf power is measured by

switching the rf coaxial relay "off" then measuring the power meter dc output

voltage on channel 8, switching to channel 9 and measuring the difference

between the coarse offset voltage and the power meter voltage. This sets the

programmable digital to analog converter (DAC) to this difference in voltage

so that the sum of the coarse offset plus the DAC output (called the corrected

offset voltage hereafter) is equal to the bridge voltage within ± 1 mv. The

DVM input is then switched to input channel 10 which is the difference between

the power meter voltage and the corrected offset voltage; the offset difference

(less than 1 mv) is measured; the rf coaxial relay is switched "on"; and the

new offset voltage difference (on channel 10) is read. The dc voltage across

the thermister will have decreased to compensate for . the rf power which has

been dissipated in the rf thermistor mount. As the rf heats the thermistor

element, its resistance tries to decrease, but the self-balancing action

reduces the dc current just enough to maintain the resistance at 200 ohms.

The decrease in dc power to the thermistor is equal to the rf power introduced

into the thermistor.

27
P, ( with no rf) dc P, (with rf) rf dc

so that

where is the dc voltage with no rf and is the power meter dc voltage with

the rf applied to the power detector.

The form of the equation normally used for the type IV is

P

rf

= T00O [AV(2E - AV)] >

where P is the rf power in milliwatts, E is the power meter dc voltage (across

the thermister with no rf applied, and AV is the change in power meter voltage

(E^ - ^ = for the detector mount used in the ETMS.

3.3.4 Analog Multiplexer

The analog multiplexer is controlled from the ETMS control unit to provide

twelve input channels into the digital voltmeter. These inputs are connected to

the DVM input through two-pole reed relays to provide for floating both the high

and low inputs to the DVM.

The channel assignments are:

Channel 0

Channel 1

Channel 2 Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Channel 8

Channel 9

Channel 10

Channel 11

Shorted DVM inputs

Temperature

Dew point

4- 20 volt supply

+ 12 volt supply

DAC output

Diode detector voltage

DAC reference voltage

Power bridge voltage

Offset voltage

A Volts power-measure

Spare or auxiliary input

28
3.3.5 Temperature and Dew-Point Meters

The temperature and dew-point sensors are bridge circuits having a remote

composite thermister probe in one leg. The bridge outputs are followed by

instrument amplifiers to provide a 10 mV per degree Fahrenheit scaled output.

These outputs (temperature and dew point) are connected to DVM input channels

No. 1 and No. 2; and to the temperature and dew-point panel displays.

The dew-point probe has a thermister surrounded by a wick bobbin containing

(LiCl) lithium chloride. Electrodes are connected to the lithium chloride so that an electric current can be conducted through it, thus heating it.

The LiCl absorbs moisture from the surrounding atmosphere, decreasing its

electrical resistance. The electrical current heats the LiCl bobbin until

an equilibrium is established between the vapor pressure of the moisture in

the LiCl and the ambient humidity. The thermister senses the probe temperature

so that the bridge output is proportional to the dew-point temperature.

3.3.6 X-Band Dual Noise-Add Standard

The dual noise-add source injects a reference level noise power into the

earth terminal system between the receive-output of the antenna and the input to

the low noise amplifier. This noise source acts as a stable reference level

which is turned on and off remotely by the ETMS control/rf unit.

Measurements are repeated with the noise-add source both off and on and

the calculated results corrected so as to keep the measured noise-added power

constant. This effectively removes the effects of receiver gain changes from

the measurements.

The two individual sources differ in power output by approximately 3 dB

and they can be used singly or together. Software can be implemented to

utilize the power step difference between the two as a receiver system linearity

verification check.

This is accomplished by using two coaxial noise diodes which are combined

through two, 3-dB hybrids resulting in a circuit which attenuates the output of

noise diode No. 1 by 3 dB more than the output of diode No. 2. The combined

noise output is connected to the insertion directional coupler through a semirigid coaxial line.

29
The noise diodes are biased by two constant current generators whose reference is a very stable, precision, solid-state voltage standard. The noise outputs

are adjusted for best temperature stability and 3 dB difference by selected trim

resistors in the constant current source circuits.

Each diode is switched off by shunting the diode bias current to ground

through a transistor switch. The transistor switch is connected to the input

control line through an optical coupler.

3.4 System Control Circuits

The calculator controls the ETMS system via I/O-Select Code #4 through the

TTL 8-bit bi-directional interface to the ETMS Control/rf unit. The control

signals are the function-select code (MSB 4 bits), data (LSB 4 bits), the control

command (CTL 1), and the auxiliary interface control signal (i/O) . These are processed in the ETMS control/rf unit and distributed to the various sub-systems

or to the voltmeter control (refer to figure 3). The system answer-back signal

called the return flag (or just flag), is collected in the control/rf unit from

the various sub-systems and the voltmeter control and sent back to the calculator

via this control/rf unit interface cable.

The voltmeter data, voltmeter read command, and flag signal are connected

to the calculator via a BCD input interface cable on I/O-select code //2. The

clock, month, and day data are connected to the calculator through a BCD input

interface cable on I/O-select code #3.

3.4.1 Control Signals

The signals that control the ETMS are divided into two classifications,

the function select lines (data bits) 5,6, and 7 having binary weights 16, 32,

I and 64 respectively, and the four data bits 1, 2, 3, and 4 having binary weights

1, 2, 4, and 8. The function-select information (lines 5, 6, and 7) are combined

with the function data (lines 1, 2, 3, and 4) to form a seven-bit control code

to activate or deactivate any function in the ETMS. This control code can be

selected on the programming switches on the ETMS ccntrol/rf unit and the LOAD

button pressed to generate a control pulse or the code can be programmed on

the calculator using the WBYTE command, and output to i/O-select code //4. NOTE: If WBYTE is used, the form must be WBYTE XX; where XX is the control

code suffixed by the semicolon. The semicolon tells the calculator not to wait

for a second flag or "end of data" signal from the interface.

30
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60

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F*<

sdoivinoivo

31

INPUT

CHANNEL

MUX

RELAYS
The control function select codes (bits 5, 6, and 7) are listed in the

following table.

Function

DVM Range

DVM Function (DCV)

Programmable Attn

Step Attn & RF On

Noise-add

Voltmeter Input Channel

Switch Codes

8 7 6-5 Decimal Code

X 0 0 1 16+

X 0 1 0 32+

X 0 1 1 48+

X 1 0 0 64+

X 1 0 1 80+

X 1 1 0 96+

(X represents a "don’t care" position.)

A complete list of the command codes is given in section 2.3.1. 1 of this

manual

.

3.4.2 Offset Voltage Control

The offset ref erence. voltage is used to increase the digital voltmeter

resolution of the power meter measurement. This reference offset voltage from

the DAC must be set equal to the bridge voltage (within one 11V) while the rf

signal is turned off in the ETMS. The output of a DAC is wired in series with

a fixed voltage offset. When DVM channel 9 is selected, the DVM low input is

connected to the fixed voltage offset and the DVM high input is connected to

the power bridge so that the DVM reading is the difference voltage. This DVM

reading is the input data to the DAC. The DAC strobe is enabled when the DVM

channel 9 is decoded so that the DVM flag pulse strobes the DAC, storing the

DVM reading.

3.4.3 Noise-Add Control

The X-Band Solid-State Dual Noise-add Standard is remotely controlled by

the ETMS control/rf unit through auxiliary coaxial cables already installed

between the earth terminal control room and the rf room at the antenna. The

ETMS console turns the noise-add source off by effectively shorting the coaxial

line with a transistor switch. The control inputs of the noise-add power suppl

(constant current sources) are coupled to the incoming control lines through

optical couplers.
3.5 System Flag Circuits

There are three independent flag circuits; the DVM data-ready flag on I/O

select code //2, the time and date data-ready flag on I/O select code #3, and

the ETMS control-ready flag on I/O select code #4. Select codes // 2 and #3 are input only I/O channels. The control-ready flag on #4 includes control commands

to the DVM (range, function, etc.) and the return flag for the break-point

switches on select code //4 input. The output or input return flags on the

control/rf unit is selected depending on the interface auxiliary control line

called I/O signal on select code #4

3.5.1 ETMS Control/RF Console Flags

The control interface cable, I/O select code #4, is a bidirectional buss.

Control data is transferred to the ETMS and the break-point switch input data is

transferred from the ETMS control/rf unit to the calculator on this interface.

A device ready flag is required for both input and output. On the input command,

the auxiliary control line I/O is high, thus directing or steering the control

signal to the input ready-flag one-shot, which sends a flag pulse back to the

calculator.

The I/O signal remains low on output commands in order to steer the control

signal to the various controlled functions.

Each of the particular functions: Programmable attenuator/RF ON, noiseadd, and multiplier /DVM control generate a ready-flag in response to the control

signal when selected. These flag pulses are combined along with the break-point

input flag to generate the interface answer-back flag for I/O select code #4 to

the calculator.

3.5.2 DVM Data-Ready Flag

The digital voltmeter generates a data-ready flag in response to the control (read) signal upon completion of the digital conversion. This data-ready

flag is sent back to the calculator on I/O select code #2 and to the DAC strobe

input if analog input channel #9 has been selected.

33
3.5.3 Clock Data-Ready Flag

The time clock inhibit circuit locks the clock reading for a one-shot

duration of 70 ms in response to a control signal (CTL1) on I/O select code #3.

The data-ready flag is returned to the calculator at the beginning of the oneshot pulse allowing time for the calculator to input the time and date before

the time data is allowed to update.

3.6 System Data Circuits

Digital data circuits are divided into four separate non-interacting

circuits: (1) Control and command data output on I/O select code //4, (2) Breakpoint switch input data input on I/O select code //4, (3) Digital voltmeter

data input to the calculator on I/O select code // 2, and (4) Month, day and time

clock data input on I/O select code //3.

3.6.1 Control Data Paths

Control data is sent from the calculator to the ETMS control/rf unit on eight (8) parallel lines. These signals are distributed to the function-select

decoders in the control/rf unit and in the multiplexer/DVM control chassis and

to the various data latches throughout the system. The decoded function will

enable the control pulse to strobe the selected function latches. All other

latches will remain unchanged since their strobe pulse is not selected by the

decoders.

3.6.2 Digital Voltmeter Data

The digital voltmeter data is output in parallel BCD data-lines and is

connected to the calculator through a BCD interface cable. This DVM BCD data is

also connected to the digital inputs of the DAC used to generate the offset

reference voltage. When the analog multiplexer channel //9 is selected, the DVM

flag strobes this DVM reading into the DAC data latches. The DVM exponent

(range) is corrected to a BCD number before being sent to the calculator by

adding +13 in base ]6 without carry. Then a decimal point is inserted in the

BCD data stream to properly position the exponent.

34
3.6.3 Date and Time Data Path

The month, day, and clock data are parallel BCD lines connected to the

calculator through a BCD interface cable.

The month and day are manually set into BCD coded thumb-wheel switches.

These four BCD digits are combined with the clock hours, minutes, and seconds

BCD data. The exponent is hard wired to minus two (-2) to locate the decimal

point between the minutes and seconds.

The power fail flag from the clock converts the exponent to +80 so that the

software program can detect erroneous time data.

3. 7 Input-Output Interfaces

Two types of calculator interface cables are used in the ETMS system. The

TTL interface cable provides eight parallel control output data lines and eight

parallel input data lines. The BCD interface cable is an input-only type which

accepts up to 10 parallel BCD digits, a polarity line, exponent digit and sign,

and an over-range line. Refer to the manufacturer’s instruction manuals for

information related to the interface cables.

The signal assignments for the ETMS control/rf unit interface TTL cable

and the BCD cables for the DVM and clock are shown in figure 4. The programming

format for each type of interface is listed on the lower portion of the figure.

35
8

Bits

Into

Computer

8

Bits

Out

From

16

BCD

Digits

Into

Computer

Computer

Control

To

ETMS

BREAK-POINT

SWITCHES

FUNCTION

LATCH

BCD

I/O #

2

BCD

I/O

ffb

data

selector

data

Digit

DVM

Digit

Clock

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Figure

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Interface

Signal

Assignments.
4 • SYSTEM TROUBLESHOOTING

This section of this instruction manual addresses troubleshooting from the

complete system viewpoint, attempting to present guidelines which will lead to

identifying the malfunctioning unit. Troubleshooting for each individual unit

is included in the section on that particular unit.

4.1 Systematic Approach '

Normally a system malfunction will be suspected when operating in a complete

system mode, either during an equipment check or during a measurement sequence.

4.1.1 Preliminary Evaluation

FIRST—STOP, LOOK, and THINK.

Note where the program failed or halted, then proceed carefully.

a. Write down the values of all ETMS, and DVM/MUX controller LED lights, the

ETMS meter reading, and the DVM reading, mode and range.

b. Look. over the printed output and try to deduce where the measurement went

i wrong

c. If program is hung up, press stop button once or twice to recover a display

character on the calculator. If a line number is displayed instead of stop,

write down the line number. If the line number is in a subroutine, press the

"step" button to advance the program one line at a time. Note: "step" will

hang up on input/output commands and the "stop" must be pressed again to recover. Repeat the "step" process until the line numbers return to the main part of the

program. This should identify where in the program the system is in trouble.

d. Now, again look over the results in the printed output and attempt to isolate

| the problem by looking for bad answers. Check the current values of any pertinent program variables in use at the time of the malfunctions.

e. Attempt to analyze the clues and deduce whether the problem is an rf signal

level failure, a control command failure, or a flag failure.

f. Manually execute a few of the program codes (programmable attenuator, step

attenuator, noise-add, DVM input channel, function and range) and observe if the

instrument responds to the command and that the ETMS control/rf unit signal

i level meter or DVM respond as expected.

37
g. Manually program any condition which looks questionable and then measure the

power level using the FNP3 command or FNDO + FND1 + FNP3 (assuming that these sub

routines are loaded into the computer memory) if the ETMS needs initializing.

h. When appropriate, check the manual attenuator and filter selector control

settings and that the correct rf input coaxial cable and noise-add control

cables are properly connected. Make sure that all coaxial connectors on the

ETMS system are tight.

i. In case of control and flag problems, carefully inspect all I/O and control

cables to be sure they are fully connected in the proper jacks AND THAT ALL

CONNECTOR LOCKS ARE PROPERLY LOCKED.

j. If the trouble still has not been isolated to a particular unit, load the

equipment check program into the calculator, change the rf input back to the

Simulated Star output if connected to the earth terminal, and proceed through

the systematic check provided. If the calculator seems to act unpredictably

,

turn the calculator and printer ac power switches off and back on, then load

and run the equipment check program again.

k. The various instruments can be checked from the calculator keyboard without

relying on program software.

1) Voltmeter - Enter the command ENTER (2,*) Q, Q1 on the calculator

keyboard and press execute. The voltmeter should take a reading and the

" return to the calculator display. Then type Q, Q1 and press execute.

Two numbers should appear on the display. The first is the DVM mode

code and the second the DVM voltage reading. If the calculator did not

return an " |-" when the enter command was executed* and the voltmeter did

read, then no data-ready flag was received back at the calculator.

2) Repeat the enter test on the clock using ENTER (3,*) Q, Ql.

3) Command control can be checked without program software by entering

a format line, 9700 Format B, and pressing the end of line key. Then type

the direct command: WRITE (4,9700) WBYTE XX; where XX is the desired

control code to actuate a particular function. Note: The semicolon must

be included. Then press the execute key. The ETMS should respond with

the prescribed command. If the ETMS does respond properly, but the lazy

T does not return to the calculator display, no ready flag is being

returned. Figure 5 shows the hand-shaking timing interaction of the

control signal and the return flag in the calculator input or output

interface. Figure 3 shows the distribution of the control signals, data

signals and latches and the return flags in the ETMS system.

38
computer/device

handshake

signals

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39

FIGURE 5

Flag

Handshake

Timing
l. When the problem has been isolated to a particular unit, refer to the troubl<

shooting section of the equipment manual for the particular unit.

m. If the calculator, printer or cassette units are suspect, turn the ac power

off on these three units and then back on again. Load the System Test Tape

furnished with the calculator accessories and run the test programs as described

in the instruction booklet, "System Test Instructions," furnished with the

calculator.

*One unexpected result can be that the calculator appears hung-up for a short

time (5 seconds to 2 minutes) and then gives an ERROR 2 (out of memory). The

internal BCD I/O software attempts to input BCD digits until a line-feed is

received. When the ERROR 2 occurs, the calculator did not recognize the 16th

and last character (LF) transmitted by the BCD interface card. The BCD. I/O

card is programmed for either high-true or low-true logic input signals by

grounding one of two lines in the interface cable. The ETMS uses high-true

logic, requiring that line 917 in the interface cable be connected to ground.

Without this ground connection the ERROR 2 occurs.

To check, read the 16 characters (see pages 1-5 of 12203-A BCD Interface

Installation and Service Manual) using the following program:

9600

9610

9620

9630

FOR 1= 1 TO 16

PRINT I, RBYTE 2 (or 3 for clock)

NEXT I STOP

The sixteenth character should be 10 (line feed). If not, wire 917 on pin 49

of J352 is not grounded. Use RBYTE 3 in above program to check the clock. If

the sixteenth digit is not 10, check wire 917 on pin 47 of J400 of clock for

ground connection.

40
5. ETMS CONTROL/RF: INSTRUCTION MANUAL

5 . 1 Introduction

The ETMS control/rf unit (fig. 6) serves as a system controller as well as the rf signal precessor to amplify and control the level and establish the

bandwidth for optimum rf power detector measurements.

The ETMS control/rf unit is the controller for the entire ETMS system.

All control signals from the calculator are distributed to the various units

through this unit. Manual programming switches are provided on the front panel

to exercise the various functions. The rf level monitor protects the power

dectector unit by switching the rf power off if 5 mW (+7 dBm) is exceeded.

Simulated star and sky noise and noise-add sources are built into this unit

to permit self-checks of the system without connecting to an earth terminal.

Remote controls for the X-Band noise-add sources allow injection of a known

added-noise at the throat of the antenna so that the gain of the earth terminal

receiver can be monitored and the measurements corrected to compensate for gain

changes

5 . 2 Specifications

The input frequency range is limited to 10 to 200 MHz, by the internal

amplifiers

Inpu t impedanc; The input impedance is 50 ohms.

Power level : The maximum output power into 50 ohms is limited to 1.2 milliwatts

to prevent amplifier compression and nonlinearity. The internal programmable

attenuators, 0-15 dB, and an internal check-standard attenuator, approximately

6 dB, are controlled by the calculator.

Simulated noise source : These noise sources have a frequency output of 10 to

100 MHz, bandwidth limited by an rf combining amplifier. There are three

programmed noise-add generators, two controlled by the calculator which are approximately 3 dB apart, and one manually controlled through an 11 dB manual

attenuator

41
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5.3 RF Circuits

5.3.1 Input Circuits

The rf input of the ETMS system is connected to the IF patch panel (downcan be connected to the built-in star simulator output via a short coaxial

cable (see block diagram in figure 7).

A high quality manual attenuator (zero to 70 dB) adjusts the level of the

incoming signal (or noise)

The output of the attenuator is connected through a bandpass filter selector

switch permitting selection of wideband (through connection) or 2.5 MHz bandpass

at .30 MHz center frequency, or 5.3 MHz, 2.5 MHz or 1 MHz bandpass at 70 MHz

center frequency.

The noise-bandwidth of each of these filters has been measured in the

system so that measurements requiring known bandwidths such as C/kT can be

performed. The quantity referred to as the noise bandwidth and measured in

situ for the four bandpass filters in the ETMS is given by the area under the

center frequency (e.g., 30 MHz or 70 MHz). This definition differs from the

standard definition of noise bandwidth which is the area under the power-gain

curve normalized by the maximum power gain of the filter. If B is the noise

bandwidth, and g(f) is the power-gain function of the filter with g as the

center frequency gain of the filter. Then

converter output) which is normally 30 or 70 MHz. For self-checks, this input

power-gain curve normalized by the power gain of the filter at the defined

GO

B

0 g(f)df

ao

| Measuring the power gain g(f.) at each step frequency f., and stepping the

1 1

! frequency across the bandpass in uniform steps Df,

43
STAR

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t!

: nt

COl

in

poi

Ovi

44
This process is repeated for each filter in the ETMS.

5.3.2 First Amplifier

The output from the bandpass filter selector module is padded with a 3-dB

attenuator to stabilize the impedance seen by the first amplifier. This prevents

the amplifier from oscillating when the rf input is open circuited. This low

noise amplifier has a gain of approximately 30 dB and is padded with 10 dB of

attenuation in its output.

5.3.3 Attenuator Module

A highly repeatable programmable attenuacor having 0 to 15 dB attenuation

is used to optimize the measurement power level under calculator control.

Immediately following is a step attenuator which is used as a reference or standard check which is inserted and removed automatically during each measurement. The attenuation value of this attenuator is checked in the program to

verify that the second amplifier and power detector are working linearly.

5. 3.

Second Amplifier

The input of the second amplifier is padded by 10 dB to minimize effects

of small impedance changes in the attenuator switching. This amplifier has a gain of 30 dB. There is no padding in the output of this amplifier. In

addition, the output power is kept below two milliwatts to avoid any detectable compression or clipping in the amplifier response.

5.3.5 Monitor and Output Circuits

A directional coupler samples the amplifier output and a diode detector and

comparator monitors the signal (or noise) level and switches a coaxial relay off

in the rf output line, avoiding possible damage to the thermistor mount in the

power detector unit. Normal power to the power detector is under one milliwatt.

Overload threshold is adjusted to 5 milliwatts (+7 dBm).

45
5.3.6 Star Simulator Circuits

The simulator is three identical solid state noise sources (two of which

are switched simultaneously with the remote noise-add controls). The three

outputs are combined, amplified, and made available at the front panel.

The background and star noise source is connected through a 0 to 11 dB

attenuator so that its level may be manually adjusted over this range, but

cannot be turned off. The other two noise sources NA//1 and NA//2 are attenuated

6 dB and 3 dB, respectively, so that their output levels are similar to the

noise-add received through the earth terminal. NA//1 and NA//2 simulated sources

are controlled simultaneously with the earth terminal noise-add standard,

however, only one set of noise sources is connected ETMS input at any one

time.

5.4 Control and Flag Circuits

5.4.1 Control

The distribution of the control signals is shown in figure 3. The calculator command data (8 bits parallel) and Manual program data are connected to

two, 4-bit digital input multiplexers. When the "LOAD" button is pressed, the

multiplexer changes to the programming switches and the program switch data is

placed on the data lines. The least significant four bits are distributed to

the inputs of the various data latches. The next three bits (5, 6, and 7) are used as inputs to the function—select decoders. The decoded function is used

to enable the desired latches so that the low four bits of data are strobed into

the latch by the CTL pulse.

The CTL pulse is generated by a one-shot, triggered by the "LOAD" button

or by the calculator interface. In normal operation the data from the calculator is fed through the digital multiplexers and to the data and function

buss. The control pulse strobes the data into the selected function latches.

These data busses are connected to the DVM/multiplexer control via an interconnecting cable so that the program switches can also control the DVM functions.

46
5.4.2 Ready Flags

After the calculator sends out data on the buss lines and the control

pulse (CTL) , it waits for a ready-flag signal to be answered back from the

device, or when the calculator requests input data by switching the I/O signal

to input and sending a CTL pulse, it waits for a data-ready flag to be returned

(from the break-point switches, for example). This is the flag hand-shaking

between devices and the calculator. Each command function generates its own

flag pulse and they are combined in the ETMS control/rf unit to return to the

calculator.

When the front panel break-point switches are read, the CTL pulse triggers

a one-shot pulse which is sent back as the flag.

5.5 Power Distribution

The ac primary power circuits are dual-voltage circuits capable of operation on either 120 or 230 volts, either 50 or 60 Hz. The small printed circuit

card below the fuse holder connects the power leads for the correct voltage.

The selected voltage label is visible in the fuse holder. The two fans are operated in parallel for 120 volts and in series for 230 volts.

5 . 6 Digital Circuit Description

This unit contains three printed circuit boards: the control board (Z 700),

the switching board (Z 400), and the rf processor board (Z 500).

5.6.1 Z 700 Control Card (Schematic, Figure 12)

The control card has an eight-bit digital multiplexer (IC’s 6 and 7) which

selects the input signals either from the calculator I/O cable or from the front

panel programming switches when the load push button is pressed. The output

signals from these multiplexers are distributed to data latches on this board,

the Z 400 driver, and the Y 100 voltmeter/ scanner control board. For manual

operation, a code set in the programming switches is transferred into various

data latches when the "load" push button is pressed. When the normally closed

47
contacts of the load switch are open, the multiplexer is switched from calculator input to the manual programming switches. The "load" switch is debounced

by F/F gates in IC-1 and initiates a one-shot pulse in IC-3. The length of the

pulse is determined by the RC combination of Cl and R13. This pulse is the

manual entry control signal (CTL)

.

Data from the calculator is entered through the I/O cable and multiplexer.

The calculator control signal (CTL) is coupled through steering gates IC-1

and IC-2 into a CTL one-shot (IC-4) or into the "input flag" one shot IC-5

depending on the state of the I/O signal from the calculator. When this I/O

signal is high, the calculator interface is in the input mode and is inputting

the status of the break point switches on the instrument panel. When the I/O

signal is low the calculator is outputting control data to the system.

The manual load pulse is "ORed" with the calculator "CTL" signal in gate

IC-8 to provide a load strobe to the system central logic.

The eight bits of the control data word are divided into two functions,

while the most significant bit (MSB), bit eight (H) , is not used. The lower

four bits, one, two, three, and four (A, B, C, & D) , program the function, and

bits five, six, and seven (E, F, & G) select the device to be controlled, such

as the programmable attenuator or the DVM range or the noise-add generators.

The noise-add data are selected by the steering logic gates IC-2, IC-9 and IC-8

so that the function data on the lower four bits are enabled and strobed into

the noise-add data latches IC-10. The steering logic combines the device select

bits with the CTL signal to produce the strobe for these data latches. IC-8

and IC-1 provide a noise-add flag for the calculator.

The noise-add control circuitry is also on this card. Noise-add switching

signals are connected to jacks on the rear panel to remotely sv/itch the noiseadd standards placed at the antenna feed. In addition, two TTL logic level

noise-add control signals are provided on the rear panel. These are switch

selectable for high true or low true logic.

The remote, cables to the noise-add generators at the antenna are driven by

transistors and which are driven by open collector gates in IC-12. The

transistors switch +24 VDC through 2 kilohms load resistance to ground potential

in order to drive the capacitance of the remote cable lines and control the

remote noise-add generators. The noise-add generators are turned on when the

remote cable is at +24 V or open circuited. All the noise-add signals are

controlled by the state of the noise-add ill and noise-add if 2 data latches. The

front panel LED indicators showing the state of these signals are driven by

gates in IC-12.

48
Simulated noise-add cons taut current generators

This card also contains three constant-current power-supplies which drive

internal noise sources. The output of these simulation noise sources is brought

j out to a front panel jack and can be connected to the input jack for a simulated

| test run. One of these noise sources represents the ambient noise while the

other two are switched off and on by the noise-add control signals.

The three constant-current power-supplies are operational amplifer (IC-13,

14, and 15) connected as a Howland voltage to the current converter circuit [9]..

The simulated noise-add noise sources are controlled by shunting each

constant-current power-supply output to ground through an open-collector gate

(IC-12), thus turning the noise generator off.

i Test Codes

Manual or WYBTE

Table I. Test codes for noise-add circuits.

Expected Results

NA //I Front Panel

NA //2 Front Panel

80

10

ON J

1Q

ON J

2 81 10

OFF OFF

82

10

ON NC

i 8310

OFF NC

8 ho NC ON

8510

NC OFF

86

10

NC NC

00 'U M O

NC NC

88

10

Same as 80

89 Same as 81

90 Same as 82

91 Same as 83

92 Same as 84

93 Same as 85

94 NC NC

95 NC NC

49

j
Table II. Trouble-shooting noise-add.

Test program codes for noise-add.

Test Code Noise-Add //I Noise-Add \\2

Program Switch

and WBYTE

Front

Panel J * 10

Simulated

Noise //I Front

Panel J

2

J * J 20

Simulated

Noise //2

80

10

ON +24V +4V ON ON +24V +4V ON

81

10

OFF + .5V +.7V OFF OFF +.5V + .7V OFF

82

10

ON +24V +4V ON NC — — NC

8310 OFF + .5V +.7V OFF NC — — NC

00

(—

l

O

NC — — NC ON +24V +4V ON

8510

NC — — NC OFF + .5V + .7V OFF

86

10

NC — — NC NC — — NC

87

10

NC — — NC NC — — NC

NC represents no change (unaffected).

*Signals on and J^q may be inverted from that shown on table depending on on the position setting of the "0/1" switches S10 and S20.

When the noise-add signals are connected to the system (actual or simulated),

the level meter on the front panel should show an increased reading if the meter

hold switch is in "bypass" when either or both noise-add signals are turned on.

5.6.2 Z 400 Switch Driver Card (Schematic, Figure 8)

The Z 400 printed circuit board contains the control and switch-drive

circuitry for the programmable attenuator and step attenuator. In addition, the

flags from the various functions are recombined on this card so they are available for the calculator on the 1/0 flag line.

Circuit description

The digital control data from the manual/auto multiplexer on the Z 700 card

is connected to decoding circuits to decode the desired device code. Control

bits five, six, and seven (E, F, and G) are decoded in IC-401 to enable the

CTL signal to strobe the data latches IC-404 and IC-408 for the selected device.

Control bits one, two, three, and four (A, B, C, and D) select the particular

function to be programmed in the device; i.e., 1, 2, or 5 dB in the programmable

attenuator or bridge rf ON. Control bit A supplies the true/false or Off /on

information while the decoded CTL signal is conditioned with bits B, C, and D

L

50
in steering gates IC-402 and IC-403 to enable the "load" strobe to the selected

data latches in IC-408. Programmable attenuator control bits are latched in

IC-404

Flag circuits

The selected CTL signal for the various devices are combined in the NOR

gate IC-406 to control the flag one-shot IC-409 to generate the flag pulse. The

device flag pulse is combined with the input-command flag signal from the Z 700

card in IC-419 and is returned to the calculator I/O on pin #55 as the FLG signal.

Switch drivers

The programmable attenuator and coaxial relays are latching relays so that

the switching circuitry provides a pulse to one of the two terminals to actuate

! the device. The programmable attenuator is strobed by a one-shot, IC-405, and

I the switches are driven through open-collector gates IC-413, 414, 415, and 416.

These gates energize switching transistors Q-l through Q-8 in a bipolar, mutually

exclusive cross-coupled circuit. The coaxial relays are strobed by one-shots

IC-407 and IC-410 and gates IC-417 and IC-418. Transistor drive circuits are

formed by Q409 and Q410 and Q411 and Q412 to switch the relays. Overload pulse

signals from the Z 500 rf level-processor board are connected to pin 15 and pin

33 to pulse the bridge rf driver off when overload occurs. The overload indicator

signal on pin 45 from the Z 500 board drives the front panel indicator light

through IC-420. The overload signal is combined with the power meter rf ON

signal to drive the rf ON front-panel indicator LED so that the rf ON indicator

goes out when an overload occurs and the rf is switched off via the overload

circuits. The step attenuator LED is driven by IC-411.

The front panel programmable attenuator LED indicators are driven through

j auxiliary contacts on the attenuator body.

The attenuator action can be monitored by observing the rf level meter on

i the front panel and the power detector milliamp meter. If the unit is not con- nected to a source, patch the simulated noise-add to the input connector and turn

the noise-add generator on with programming code 80 ^q. Note: When the noise-add

is turned on, the meter is inhibited unless the meter hold switch is in bypass.

Table I and Table II list the control codes and expected results when

troubleshooting the switch driver circuits.

51
Table I. Test codes for Z 400 board

Programmable attenuator.

Manual or WYBTE Result

63

10

0 dB attenuation

62io 1 dB attenuation

61

10 3 dB attenuation

60

10 3 dB attenuation

5910 4 dB attenuation

58 5 dB attenuation

57 6 dB attenuation

56 7 dB attenuation

55 8 dB attenuation

54 9 dB attenuation

53 10 dB attenuation

52 11 dB attenuation

51 12 dB attenuation

50 13 dB attenuation

49 14 dB attenuation

48

10 15 dB attenuation

Table II.

Step attenuator and rf on.

Manual or WYBTE

64

65

66

67

68

69

10

10

10

10

10

10

Step Attenuator

IN

OUT

IN

OUT

NC

NC

RF

OFF

ON

NC

NC

OFF

ON

52
5.6.3 Z 500 RF Level Processor Board (Schematic Figure 10)

The rf level processor printed circuit card monitors the output of the

diode detector. The input on pin 13 is amplified by IC-501 and fed to the

j overload level comparator, IC-506, through the overload-adjust potentiometer

"H" (R5). If the rf power exceeds 5 milliwatts, the overload comparator

triggers and latches. This forces the rf off /on switch on the Z 400 board

j "off" via IC-509 and also energizes the sonalert alarm and overload LED via

Pin 47.

The comparator cannot be reset by pressing the reset button until the power

level has been reduced to a safe level. When the comparator is reset, a oneshot, IC-508 pulses the rf-on latch (Z 400 board) to the reset (off) state so that the latch (and LED) coincide with the off position of the coaxial latching

relay.

The incoming signal level is also processed through a log-amplifier to the

front panel rf level meter. The output of the level amplifier passes through a sample and hold circuit, IC-502, which, when enabled by the front panel "Hold"

switch, latches the meter to prevent meter surge while the noise-add sources are turned on. Delay timer IC-507 smoothes meter action during noise-add switching.

The output of the sample and hold circuit drives a log-amplifier, IC-504,

to convert the meter reading to a dB scale. IC-503 forms a constant current

source to set the zero reference of the log amplifier. The output of the logamplifier drives the meter driver amplifier. The gain of the meter amplifier is

switched for gains of xlO, xl and xO.l to obtain meter scales of 1 dB, 0.1 dB,

and 0.01 dB. Potentiometer "D" (R14) adjust the xl scale zero reference.

5.6.3. 1 Adjustments on RF Level Processor

The adjustments on the rf level processor establish the logarithmic amplifier gain for the decibel scale on the front panel signal level meter and sets

the overload alarm threshold. Complete alignment requires two, 1-milliamp

constant current sources. The sequence for complete alignment follows:

|

Referring to figure 10,

1. (a) Mount the Z 500 printed circuit card on the pc extension card.

(b) Remove signal input cable from RF INPUT on front panel.

(c) Set FILTER switch to 5.3 MHz B.W., 70 MHz on front panel.

53
2. Put a BNC 50 ohm termination on the "TO OUTPUT" jack on front panel.

3. Connect external voltmeter between TP#1 and ground. Adjust "A" (R7)

dc offset on first amplifier for zero on the voltmeter.

4. Switch "HOLD" switch to bypass on front panel. Connect the external

voltmeter to TP-V and adjust offset "C" (R9) for a zero reading on the Volt

meter.

5. Remove jumper TP-V to TP-W. Connect temporary jumper TP-X to TP-Y.

Connect external voltmeter to TP-Y. Adjust "E" (R19) dc offset first

stage of log-amplifier for zero voltmeter reading.

6. Remove temporary jumper TP-X to TP-Y. Remove jumper Z-Zl. Then connect

a +1 milliamp constant current source into TP-Z1 and ground; connect the

other +1 milliamp constant current source into TP-W and ground. Set

both current supplies to 1 milliamp*. Connect the external voltmeter

to TP-2 and ground. Adjust "F" (R20) dc offset of second stage of logamplifier for zero volts on the voltmeter.

7. Remove both constant current sources. Replace jumper TP-V to TP-W.

Replace jumper TP-Z to TP-Zl. Remove the BNC termination from the

"TO OUTPUT" jack on the front panel.

8. Connect coaxial cable between SIMULATED STAR OUTPUT and RF INPUT on front panel. Connect external rf power meter to RF OUTPUT jack on front panel. Turn bridge "on" with control code 67. Adjust input ATTN

and SIMULATED STAR NOISE for 1 mW reading on the power meter.

9. Connect an external voltmeter to TP//1. Adjust first amplifier gain "B"

R6 for 1 volt on voltmeter.

*Connect two milliampre meters in series connection and establish a current

reference point on both meters at approximately 1 ma of current. Use the

reference points for adjusting the two constant current sources for equal

currents.

54
10. Reduce power to 500 microwatts on power meter. Switch meter range

selector on front panel to the XI position. Adjust "D" (R14) log

reference zero offset for a zero reading on the front panel signal

level meter.

11. Increase input attenuation by 5 dB. Adjust log-amplifier gain "GM

(R21) for a front panel meter reading of -5 divisions. Decrease the

input attenuation 10 dB and note front panel meter reading. Touch

up "G" if necessary to obtain approximately +5 reading on the meter

scale. Recheck -5 reading.

12. Set input attenuator for 1 milliwatt power reading on the power meter.

Readjust "D" for +3 division reading on the front panel meter.

13. Adjust front panel attenuators for 5 mW (+7 dBM) power on the power

meter. Adjust overload threshold "H" (R5) clockwise until alarm sounds.

Back off counter-clockwise 1/2 turn. Reduce input power, reset alarm and

turn bridge back on with control code 67. Slowly increase power to test

alarm threshold at approximately 5 mW power level.

This completes alignment of the rf level processor monitor circuits. These

adjustments do not affect the operation or accuracy of the measurements.

5. 7 Simulated Star Noise Sources

The three solid-state noise sources used for simulating earth terminal

reception are mounted on the Z 600 sub-assembly. The constant current bias

supplies to power these noise sources and their control switches are on the

Z 700 printed circuit board through Z 700 - J2. Refer to figure 14 for a block diagram of the Z 600 sub-assembly and the schematic of the solid state

noise sources.

5.8 Troubleshooting the ETMS Control/RF Unit

When a problem has been identified as being in this chassis, the nature of

the problem (1) no rf signal, (2) rf signal loss during a particular function,

(3) improper response or no response to control commands or (4) calculator hangs

55
up on I/O select code #4 command due to loss of return Ready-Flag, will already

be known or at least suspected.

I 5.8.1

RF Signal Diagnostics

When the problem is a loss of signal, the most straight forward approach is

I to trace the input rf or noise signal through the ETMS unit using a sensitive

detector. The various parts of the circuit can be isolated at the short BNC

cables on the front panel. Use caution not to overdrive the amplifier inputs.

An alternative would be to use a signal generator and inject a signal at the

'

i power detector and then trace the circuit backward until the signal is lost.

Evaluation of a coaxial relay performance can be made by measuring the

repeatability of the dc contact resistance. The resistance should be less than

0.2 ft plus the adapter and lead resistance and should be repeatable within

I ± 0.1 ft.

I

5.8.2

Control Circuitry Diagnostics

I

The control circuitry can be examined by following the check-out tests

given in section 2.3 of this manual, first check out the manual programming

command codes and then commands via the calculator. NOTE: The DVM multiplexer

control cable must be connected, otherwise the ETMS rf unit ready-flag back to

the calculator is inhibited.

. Attempt to isolate the clues as to the particular malfunction. Note whether

the LED lites coincide with the command. If more than one malfunction is present

try to deduce which data signals are common to both. This helps to determine

whether the problem is in the data and decoder busses or in the latches and

drivers.

Follow through the circuit description and schematics in section 5 for a particular circuit once the problem has been localized.

5.8.3

Ready-Flag Diagnostics

f Follow the same procedures given in section 5.8.2 while monitoring the

Ready-Flag line with a logic probe or oscilloscope or simply use the calculator

response as an indicator. The Ready-Flag can be monitored on pin 55 of the

Z 400 printed circuit card.

56
L • D . D

.

1 DEC 77

5*9 PARTS LI ' I - ControI/RF Unit

PARTS LIST- RF UNIT (Z) DAI A 9

CATEGORY NO.

DSGN

1 Z-Rl

1

QTY DESCRIPTION

1 RES VAR 10 TURN

RESISTORS

VALUE MFG PART NUMBER

10K OHM DUNC 3253-103

CATEGORY NO. 2-

DSGN QTY DESCRIPTION

-CAPACITORS

VALUE MFG PART NUMBER

1 Z-Cl

2 Z-C2

1 CAP ELECTRLC 50V

1 CAP ELECTLC 50V

500 UF CD UBF-500-50

50 UF SPRG TE-1304

:ategcry no. -DIODESDSGN QTY DESCRIPTION VALUE

1 Z-Dl 10 LED INDICATOR LIGHT 5 VOLT

2 Z-D2 SAME AS Dl 5 VOLT

3 Z-D3 SAME AS Dl 5 VOLT

4 Z-D4 SAME AS Dl 5 VOLT

5 Z-D5 SAM E AS Dl 5 VOLT

6 Z-D6 SAME AS Dl 5 VOLT

7 Z-D7 SAME AS Dl 5 VOLT

8 Z-D8 SAME AS Dl 5 VOLT

9 Z-D9 SAME AS Dl 5 VOLT

10 Z-D10 SAME AS Dl 5 VOLT

11 Z-Dll 1 DIODE ,SILICON 400V 1 AMP

MFG PART NUMBER

DIAL 550-0506

RCA 1N4004

!

I

CATEGORY NO. 5-

DSGN QTY

1 Z-IC1 1

integrated CIRCUITSDESCRIPTION VALUE

INT CRKT REGULATOR 24V 1 AMP

MFG PART NUMBER

TI UF7824C

57
L.D.D. 1 DEC 77 PARTS LIST- RF UNIT (Z) DATA 9

CATEGORY NO. 6 • CONNECTORS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 J1-J9 9 CONN PANEL BNC-RG58U COAX AMPH 31-3206

2 Z-J10 1 CONN PANEL BNC-BNC COAX AMPH UG-492/u

3 Z-Jll 1 CONN PANEL N-N COAX AMPH UG-30D/u

4 Z-J12 1 CONN PANEL N-RG58U COAX AMPH UG-566B /u

5 J13-J30 18 CONN SMA ELBOW-RG58U COAX EFJ 142-0262-001

6 J31-J36 6 CONN SMA EL- .141 COAX COAX AMER 25805

7 Z-J37 1 CONN N-.141 SEMI RIGID COAX OSM 402-1

8 J38-J41 4 CONN SMA- .141 SEMI RIG COAX CSM 201-1

9 Z-J42 J42-J645 NOT USED

10 Z-J646 1 CONN PC EDGE ( Z 40 0

)

60 PIN AMPK 261-10030-2

11 Z-J647 1 CONN PC EDGE (Z500) 6 0 PIN AMPH 261-10030-2 j: 12 Z-J648 NOT USED i 13 Z-J649 1 CONN PC EDGE (Z700) 60 PIN AMPH 261-10030-2

14 Z-J650 1 CONN BLUE RIBBON I/O 24 PIN AMPH 57-40240

15 Z- J 6 51 1 CONN BLUE RIBBON I/O 14 PIN AMPH 57-40140

16 Z-J652 NOT USED l)| 17 Z-J653 4 CONN PANEL BNC COAX AMPH UG-1094/u

18 Z - 0 6 5 4 SAME AS 0653 COAX E 19 Z-J655 1 CONN RECEPTACLE 5 PIN VI KG V R5/4AE1 3 j

fc 142-0261-001 jj

20 Z-J 6 56 SAME AS J653 COAX

21 Z-J657 SAME AS J 6 5 3 COAX

22 P1-P16 .16 CONN PLUG SMA-RG58U COAX EFJ

23 P17-P27 11 CONN PLUG BNC-KG58U COAX TROM PL-20-5

24 Z-P28 3 CONN PLUG ENC-RG1 74/U COAX TROM PL-20-5

25 Z-P29 SAME AS P28 COAX

26 Z-P30 SAME AS P28 COAX

27 Z-P31 3 CONN PLUG SMA EL-RG174 COAX EFJ 221

28 Z-P32 SAME AS P31 COAX

29 Z-P33 SAME AS P 31 COAX i 30 Z-P34 2 PLUG (FOR IC SOCKET) 14 PIN 3M 3406

31 Z-P35 SAME AS P 35 14 PIN

CATEGORY NO. 7 TERMINALS “

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z-Tl 1 TERMINAL STRIP DOUBLE 5 LUG CNCH 5-141
,.D.D. 1 DEC 77

ATEGGRY NO. 8 DATA 9

PARTS LIST- RF

SWITCHESUN IT (Z)

DSGN QTY DESCRIPTION VALUE

1 Z-Sl 1 SWITCH AC POWER ( TOGL) DPDT

1 2 Z-S2 2 SWITCH PUSH BUTTON SPDT

3 Z-S3 SAME AS S2 SPDT

4 Z-S4 1 SWITCH ROTARY 3 POLE 3P3T

5 Z-S5 1 SWITCH COAX TAN DM ROT 2P5T

6 Z-S6 3 SWITCH RF COAX LATCHG SPDT

7 Z-S7 SAKE AS S6 SPDT

1 8 Z-S8 SAME AS S6 SPDT

i 9 Z-S9 16 SWITCH TOGGLE SPDT

i 10 Z-S10 SAME AS S9 SPDT

: 11 Z-Sll SAME AS S9 SPDT 1 12 Z-S12 SAME AS S9 SPDT

13 Z-S13 SAME AS S9 SPDT

14 Z-S14 SAME AS S9 SPDT

15 Z-S15 SAME AS S9 SPDT

16 Z-S16 SAME AS S9 SPDT

| 17 Z-S17 SAME AS S9 SPDT

18 Z-S18 SAM E AS S9 SPDT

19 Z-S19 SAME AS S9 SPDT

20 Z-S20 SAME AS S9 SPDT

21 Z-S21 SAME AS S9 SPDT

22 Z-S22 SAME AS S9 SPDT

23 Z-S23 SAME AS S9 SPDT

24 Z-S24 SAME AS S9 SPDT

25 Z-S25 S25-S655 NOT USED

2G Z-S656 2 SWITCH TOGGLE SPDT

27 Z-SG57 SAME AS S656 SPDT

MFG PART NUMBER

ALCO MSTL-206N

ALCO MSP-105F

ALCO MRB-3-3

TELC 8401

TELE CS-33S60

ALCO MST-105D

ALCO MST-105D

CATEGORY NO. S METERS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z-Il 1 METER PANEL 0-CENTER 1.5 MA MODT 25DMA1.5U1.5

ATEGORY NO. 10 HARDWARE

! DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z -II

1

2 HOUSING FRAME ASSEMBLY 7X16 HP 5060-0734

! 2 Z-H2 SAME AS HI 7X16

1 3 Z-II3 1 HOUSING FRONT PANEL 7H HP 5000-0120

4 Z-H4 1 HOUSING REAR PANEL 7X16 HP 5000-0121

59
.D. D. 1 DEC 77 PARTS LIST- RF UNIT (Z ) DATA 9

5 Z-H 5 2 HOUSING SIDE COVER 7X16 HP 5000-0743

6 Z-H6 SAME AS H5 7X16

7 Z-H7 1 HOUSING TOP COVER 16L HP 5060-0740

8 Z-H8 1 HOUSING BOTTOM COVER 16L HP 5060-0752

9 Z-H9 2 HOUSING HANDLE HP 5060-0222

10 Z-H10 SAME AS H9

11 Z-Hll 2 HANDLE RETAINER ASS'Y HP 5060-0765

12 Z-H12 SAME AS Hll

13 Z-H13 4 HOUSING FOOT ASS'Y HP 5060-0767

14 Z-H14 SAME AS HI

3

15 Z-H 15 SAME AS II 13

16 Z-Hl 6 SAME AS H 1

3

17 Z-H 17 1 HOUSING PLATE ASS'Y HP 5000-0052

18 Z-H18 1 PC CARD CAGE ALUM NBS

19 -Z-H19 1 HEAT SINK (HP8472B) ALUM NBS 1.75 X 1

20 Z-H 20 1 PLATE MAIN MOUNTING .125 ALUM NBS 14 D X 15.

21 Z -PI 2

1

1 PLATE MOUNTING (FANS) .125 ALUM NBS 3.75 X 7.

22 Z-H 22 1 PLATE (POWER SUPPYS) .125 ALUM NBS 4.75 X 10

23 Z-H 2 3 1 BRACKET .125 ALUM NBS 12 X 1.5

24 Z-H24 1 BRACKET .125 ALUM NBS 9 X .375

25 Z-H25 1 HEAT SINK (AMPLIFIERS) 11L WAKE A-1527

CATEGORY NO. 12- SUB ASS EMBLI ESDSGN QTY DESCRIPTION VALUE MFG PART NUMEER ,

1 Z-Al 1 ATTEN STEP PROGRAMBL BINARY WE IN AB134-15-6-1

;

2 Z-A2 1 ATTEN STEP ROTARY WE IN AD9003693101J

3 Z-A3 1 ATTEN STEP TAN DM ROT TELC 8140S-108

4 Z-A4 1 ATTENUATOR FXD MIN 3 dB MIDW MMT 333 j 5 Z-A5 1 ATTENUATOR FXD MIN 6 dB MI DW MMT 333

6 Z-A6 2 ATTENUATOR FXD MIN 10 dB MIDW MMT 333

7 Z-A7 SAME AS A

6

10 dB t 8 Z-A8 2 AMPLIFIER 10-200MHZ AERT Al 517

9 Z-A9 SAME AS A

8

10 Z-Fl 1 FILTER BAND PASS 7 0 MHZ Cl RQ FBT/2 0-7 0/ 1-

1

11 Z-F2 1 FILTER BAND PASS 7 0 MHZ Cl RQ FBT/2-70/2. 5{

12 Z-F 3 1 FILTER BAND PASS 7 0 MHZ Cl RQ FBT/2-7 0/ 5 .

5

: 13 Z-F4 1 FILTER BAND PASS 30 MHZ C I RQ FBT/2 1- 30/ 2

.

14 Z-Ml 1 POWER SUPPLY MODULAR 20 V LAMB LOS-Y-20

15 Z-M2 1 POWER SUPPLY MODULAR 5 V SEMI ES51000-K2

16 Z-M3 1 POWER SUPPLY MODULAR +-12V SEMI P2. 12. 100-K2

17 Z-M4 1 POWER SUPPLY MODULAR +-15V BB 527

18 Z-M5 1 COUPLER COAXIAL MIN 10 dB MERR CRM-10-500

19 Z-M6 1 DETERCTOR DIODE HP HP8472B

20 Z-M7 1 TERMINATION COAX MIN 50 OHM OSM 20 02 OP

21 Z-Zl 1 SWITCHING PC CARD NBS Z400

22 Z-Z2 1 RF LEVEL PROC PC CARD NBS Z 50 0

23 Z-Z3 1 NOISE ADD BOARD NBS Z600

24 Z-Z4 1 INPUT CONTRL PC CARD NBS Z 70 0

60
i . D .D . ATE.GORY NO.

1

13-

DEC 77 PARTS LIST- RF UNIT (Z) DAI

OSGN CTY DESCRIPTION VALUE MFG PART N

i 1 Z-Bl 1 FUSE/FILTER/AC SOCKET CORM 6 J4

I 2 Z-B2 1 AUDIO WARNING DEVICE MALL SC628P 3 Z-B 3 2 FAN PANCAKE PANM 8500C

1 4 Z— B4 SAME AS B 3

1 5 Z-B 5 1 CABLE RIBBON (Z3-Z4) 12 ALPH 3580/14

6 Z—

B

6 3 CABLE .141 SEMI FIG CX 6 INI F

7 Z-B 7 SAME AS B 6 6

8 Z-B 8 SAME AS B 6 6

1 9 Z-B9 1 CABLE .141 SEMI RIG CX 2 UN IF

ilO Z-B 10 C CABLE COAX RG58AU 20 BELD RG58AU

jll Z -B 11 SAME AS BIO 20

12 Z-B12 SAME AS E10 20

13 Z-B 13 SAME AS BIO 20

14 Z-B14 SAME AS BIO 20

15 Z-B15 SAME AS BIO 20

16 Z-B 16 SAME AS BIO 20

[17 Z-B17 SAME AS BIO 20

18 Z-B 18 4 CABLE COAX RG58AU 7 BELD RG58AU

19 Z-B19 SAME AS B18 7

20 Z-B 2 0 SAME AS B18 7

21 Z-B21 SAME AS B 18 7

22 Z-E22 2 CABLE COAX RG58AU 20 BELD RG58AU

£3 Z-B23 SAME AS B22 22

124 Z-E24 2 CABLE COAX RG5SAU 17 BELD RG58AU

25 Z-B25 6 CABLE COAX RG58AU 6 BELD RG58AU

26 2 — B26 SAME AS B25 6

27 Z-E27 SAME AS E 2 5 6

23 Z-B28 SAME AS B 2

5

6

2 5 Z-B2S SAME AS E 2 5 6

30 Z-B 30 SAME AS B 2

5

6

31 Z-B31 1 CABLE COAX RG58AU 6.5 BELD RG58AU

32 Z-B32 1 CABLE COAX RG58AU 13 BELD RG58AU

33 Z-B 33 1 CABLE COAX RG58AU 14.7 5 EELD RG58AU

(34 Z-B 34 SAME AS B24 17

35 Z-E-3 5 1 CABLE COAX RG58AU 31 BELD RG58AU

36 Z-B36 1 CABLE COAX RG58AU 32 BELD RG58AU

61
t L.D. D. 1 DEC 77 PARTS LIST- SWITCHING PC CARD (Z400) DATA 5 1

i

1

1

r, 7\ rrtrr, rn?v m i _

1

|

I Vx/^XIjVjV-/ivX IN vJ • -L X iD X UI .j

DSGN CTY DESCRIPTION VALUE MFG PART NUMEER

1 Z4-R1 3 RES FXD CARS 5% 1/4W 27. OK OHM AE CB

2 Z4-R2 1 RES FXD CARB 5% 1/4W 3 3. OK OI1M AB CB

3 Z4-R3 SAME AS R1 27 . OK OHM f 4 Z4-R4 SAME AS Rl 2 7. OK OHM

5 Z4-R5 3 RES FXD CARB 5% 1/4W 1.0K OHM AB CB

6 Z4-R6 SAME AS R5 1.0K OHM

7 Z4-R7 8 RES FXD CARB 5% 1/2W 8 2 OHM AB EB ; 8 Z4-R8 SAME AS R7 82 OHM

9 Z4-R9 SAME AS R7 82 OHM f 10 Z4-R10 SAME AS R7 8 2 OHM

11 Z4-R11 SAME AS R7 8 2 OHM

12 Z4-R12 SAME AS R7 8 2 OHM

13 Z4-R13 SAME AS R7 8 2 OHM f

- 14 Z4-R14 SAME AS R7 8 2 OHM [ 15 Z4-R15 4 RES FXD CARB 5% 1/ 4W 4 . 7 K OHM A.B CB [ 16 Z4-R16 SAME AS Rl

5

4.7K OHM i 17 Z4-R17 4 RES FXD CARB 5% 1/4W 10. OK OHM AE CB i

i

: 18 Z4-R18 SAME AS Rl

7

10. CK OHM

IS Z4-R19 SAME AS Rl

5

4.7K OHM

20 Z4-R20 SAME AS Rl

5

4.7K OHM nB 21 Z4-R21 SAME AS Rl

7

10 . OK OHM f 22 Z4-R22 SAME AS Rl

7

10. OK OHM

23 Z4-R23 SAME AS R5 1. OK OHM

r’STrrrirv ion o_ PAD APT r> C

!

1

jL \w- X X 1 U Ivu

3 DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

r

J 1 Z4-C1 4 CAP III -K MONO 50V 1.0 UF SPRG 5C023105X025

2 Z4-C2 SAME AS Cl 1.0 UF

3 Z4-C3 SANE AS Cl 1.0 UF

4 Z4-C4 SAME AS Cl 1.0 UF

5 Z4-C5 4 CAP CERAMIC 0.1 UF i 6 Z 4-CS 1 CAP TANT 35V 1.0 UF

7 Z4-C7 SAME AS C5 0.1 UF 1 8 Z4-C8 SAME AS C

5

0.1 UF !i 9 Z4-C9 SAME AS C5 0.1 UF

10 Z4-C10 1 CAP TANT 25V 10 UF

62
I

1

.D.D. 1 DEC 77 PARTS LIST- SWITCHING PC CARD (Z400) DATA 5

ATEGORY NO. 3 TRANSISTORS

DSGN QTY DESCRIPTION VALUE ME'G PART NUMBER

1 Z4-Q1 8 TRANSISTOR SILICON PNP 2L'M 919 MOT 2N4919

2 Z4-Q2 SAME AS Ql 2N4919

3 Z4-Q3 SAME AS Ql 2N4919

4 Z4-Q4 SAME AS Ql 2N4919

5 Z4-Q5 SAME AS Ql 2N4S19

6 Z4-Q6 SAME AS Ql 2N4919

7 Z4-Q7 SAME AS Ql 2N4919

8 Z4-Q8 SAME AS Ql 2N4919

9 Z4-Q9 4 TRANSISTOR SILICON PNP 2N3906 MOT 2 N 3 9 0 6

10 Z4-Q10 SAME AS Q9 2 N 3 9 0 6

11 Z4-Q11 SAME AS Q9 2 N 3 9 0 6

12 Z4-Q12 SAME AS Q9 2 N 3 9 0 6

ATE GORY NO. 4 - —DIODES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z4-CR1 20 DIODE SILICON 1A 400V 1 N 4 0 0 4 RCA 1N4004

2 Z4-CR2 SAME AS CRl 1N4004

3 Z4-CR3 SAME AS CRl 1N4004

4 Z4-CR4 SAME AS CRl 1N4004

5 Z4-CR5 3 DIODE ZENER SI 24V 1 N 5 2 5 2 MOT 1N5252A

6 Z4-CR6 SAME AS CR5 IN 5252

7 Z4-CR7 SAME AS CRl IN 4 0 0 4

8 Z4-CR8 SAME AS CRl 1N4004

9 Z4-CRS SAME AS CRl 1N4004

10 Z4-CR10 SAME AS CRl 1N4004

11 Z4-CR11 SAME AS CR5 IN 5252

12 Z4-CR12 SAME AS CR5 IN 52 5

2

13 Z4-CR13 SAME AS CRl 1N4G04

14 Z4-CR14 SAME AS CRl 1N4004

15 Z4-CR15 SAME AS CRl 1N4004

16 Z4-CR16 SAME AS CRl 1N4004

17 Z4-CR17 SAME AS CR5 IN 52 52

18 Z4-CR18 SAME AS CR5 IN 5252

19 Z4-CR19 SAME AS CRl 1N4004

20 Z4-CR20 SAME AS CRl 1N40C4

21 Z4-CR21 SAME AS CRl 1N4004

22 Z4-CR22 SAME AS CRl 1N4004

23 Z4-CR23 SAME AS CR5 IN 5252

24 Z4-CR24 SAME AS CR5 IN 5252

25 Z4-CR25 SAME AS CRl 1N4004

26 Z4-CR26 SAME AS CRl 1N4004

27 Z4-CR27 SAME AS CRl 1N4004

28 Z4-CR28 SAME AS CRl 1N4004

63

J
L.D.D. 1 DEC 77 PARTS LIST- SWITCHING PC CARD (Z400) DATA 5

CATEGORY NO. 5 INTEGRATED CIRCUITS

DSGN QTY DESCRIPTION VALUE MFG PART NUMEER

1 Z 4-1 Cl 1 INT. CRKT . BCD DECODER 7442N T

I

SN7442N

2 Z4-IC2 3 INT. CRKT. QUAD NOR • 74LS02N T

I

SN74LS02N

3 Z4-IC3 1 INT. CRKT. QUAD NAND 74LS00N T

I

SN74LS0 ON

4 Z4-IC4 1 INT. CRKT. QUAD LATCH 74LS175N T

I

SN74LS175N

5 Z4-IC5 4 INT. CRKT. ONE SHOT 7 4 12 IN T

I

SN74121N

6 Z4-IC6 SAME AS IC2 74LS02N I 7 Z4-IC7 SAME AS IC5 7 4 1 2 1

N

8 Z4-IC8 1 INT. CRKT. DUAL FF (D) 74LS74N T

I

SN74LS74N

9 Z4-IC9 SAME AS IC5 7 4 12 IN

10 24-IC10 SAME AS IC5 7 4 12 IN r 11 Z4-IC11 2 INT. CRKT. HEX INVERT 74LS04N T

I

SN74LS04N

12 Z4-IC12 SAME AS IC11 74LS04N

13 Z4-IC13 6 IC DUAL NAND OC DRIVE 75452B TI SN75452BP

14 Z4-IC14 SAME AS I Cl

3

75452B

15 Z 4-1 Cl

5

SAME AS IC13 75452B

16 Z4-IC16 SAME AS I Cl 3 75452B ft 17 Z4-IC17 SAME AS I Cl 3 75452B

18 Z4-IC18 SAME AS IC13 75452B '1 19 Z4-IC19 SAME AS IC2 74LS02N

20 Z4-IC20 1 IC DUAL NAND BUFFER 74LS38N TI SN74LS38N !

CATEGORY NO. 10- -HARDWARE

i( DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z4-B1 1 PC BRD FOR SWTCHG CRKT NBS PC -400

2 Z4-H1 8 SCREW NYLON 4-40 1/2

3 Z4-H2 8 NUT NYLON 4-40

4 Z4-H3 8 WASHER MICA INSULATOR

CATEGORY NO. 12 SUBASSEMBLIES J

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER''

1 RF SWITCHING PC CARD NBS Z400

I

|i

64

L

1 Z4
. D . D 1 DEC 77 PARTS LIST- RE LEVEL PROCESS CARD ( Z !30 0

)

DATA 6

I:Ai'EGORY DO. 1 RESISTORS

DSGN QTY DESCRIPTION VALUE MFG PAkT number

1 Z5-R1 1 RES FXD CARB 5% 1/4W 15K CI1M AB CB

2 Z5-R2 2 RES FXD MF 1% 1/4W 100 OHM CORG NC5

3 Z5-R3 4 RES FXD MF 1% 1/4W 10K OHM CORG NC5

4 Z5-R4 1 RES FXD MF 1% 1/4W 10 0 OK OIIM CORG NC 5

5 Z5-R5 1 RES FXD MF 1% 1/4W 5. IK OHM CORG NC 5

6 Z5-R6 3 RES VAR TRIM CERMET 10K OHM BRNS 30 06VJ-1-10 3

7 Z5-R7 1 RES VAR TRIM CERMET 20K OHM ERNS 3006W- 1-203

8 Z5-R8 SAME AS R6 10K OHM

9 Z5-R9 2 RES VAR TRIM CERMET IK OHM BRNS 3006Vi-l-102

10 Z5-R10 4 RES FXD MF 1% 1/4W 2 0 OK OHM CORG NC5

11 Z5-R11 SAME AS RIO 20 OK OHM

12 Z5-R12 SAME AS RIO 20 OK OHM

13 Z5-R13 SAME AS RIO 20 OK OHM

14 Z5-R14 SAME AS R6 10K OHM

15 Z5-R15 1 RES FXD MF 1% 1/4W 2K OHM CORG NC 5

16 Z5-R16 SAME AS R3 10K OHM

17 Z5-R17 SAME AS R3 10K OHM

18 Z5-R18 1 RES FXD MF 1% 1/4R 2 OK OHM CORG NC 5

19 Z5-R19 2 RES VAR TRIM CERMET 2K OHM BRNS 3006VI- 1-202

20 Z5-R20 SAME AS R19 2K OHM

21 Z5-R21 SAME AS R9 IK ohm

Z5-R22 1 RES FXD MF 1% 1/4W 511 OilM CORG NC5

23 Z5-R23 1 RES FXD MF 1% 1/4W IK OHM CORG NC5

24 Z5-R24 SAME AS R2 100 OHM

25 Z5-R25 1 RES FXD MF 1% 1/4W 10 OHM CORG NC5

26 Z5-R26 1 RES FXD CARB 5% 1/4W 100 OHM AB CB

27 Z5-R27 1 RES FXD CARB 5% 1/4W 2. 7K OHM AB CB

28 Z5-R28 SAME AS R3 10K OHM

29 Z5-R29 1 RES FXD CARB 5% 1/ 4V,1 4. 7K OIIM AB CB

30 Z5-R30 2 RES FXD CARB 5% 1/4W 3 9K OHM AB CB

31 Z5-R31 SAME AS R30 39K OHM

32 Z5-R32 1 RES FXD CARB 5% 1/4V5 27K OHM AB CB

33 Z5-R33 1 RES FXD CARB 5% 1/4Vi 10K OHM AB CB

34 Z5-R34 1 RES FXD CARB 5% 1/4W IK OHM AB CB

35 Z5-R35 1 RES FXD MF 1% 1/4W 2 4.3K OHM CORG NC5

j!

I

:

|

I

I

!

65
L.D.D. 1 DEC 77

CATEGORY NO. 2

RF LEVEL PROCESS CARD (Z500)

-CAPACITORS

PARTS LIST- DATA 6

DSGN QTY DESCRIPTION VALLE MFG PART NUMBER

1 Z5-C1 2 CAP DISK .001 UF * 2 Z5-C2 1 CAP CERAMIC .1 UF

3 Z5-C3 1 CAP POLYCARBONATE .1 UF SEAC CMK

4 Z5-C4 2 CAP DISK . 01 UF

5 Z5-C5 SAME AS C4 .01 UF

6 Z5-C6 4 CAP TANT 35V 22 UF i 7 Z5-C7 1 CAP DIP MICA 150 PF

8 Z5-C8 2 CAP TANT 20V 47 UF

9 Z5-C9 SAKE AS C8 47 UF

10 Z5-C10 SAME AS C6 22 UF

11 Z5-C11 SAME AS C6 22 UF

12 Z5-C12 SAME AS C6 22 UF

13 Z5-C13 1 CAP DIP MICA 100 PF I 14 Z5-C14 3 CAP HI -I< MONO 50V 1.0 UF SPRG 5C02 3105X0 250;

15 Z5-C15 SAME AS C14 1.0 UF i 16 Z5-C16 SAME AS Cl .001 UF

17 Z5-C17 SAME AS C14 1. 0 UF

i

'

1:

CATEGORY NO. . 4 DIODES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z5-D1 1 DIODE SILICON 100V 1N4153 MOT 1N4153

CATEGORY NO. 5 INTEGRATED CIRCUITS h DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z 5-1 Cl 1 INT. CRKT

.

OP AMP OP-05C MONO OP-05C

2 Z5-IC2 1 IC SAMPLE & HOLD SHN-LM-2 DATL S IIM- LM- 2

.3 Z5-IC3 1 INT. CRKT. FET OP AMP LH0 04 2C NATL LH0 04 2.C 4 Z5-IC4 1 INT. CRKT. LOG AMP 8048 I TSL I CL 8048 EC PI 5 Z5-IC5 1 INT. CRKT. OP AMP LM 7 4 1C NATL LM741C

6 Z5-IC6 2 INT. CRKT. TIMER LM 55 5 NATL LM5 5 5

7 Z5-IC7 SAME AS IC6 LM 555

8 Z5-IC8 2 INT. CRKT. ONE SHOT 7 4 12 IN T

I

SN74 12 IN

9 Z5-IC9 1 INT. CRKT. NAND DRIVE 75452B TI SN75452B

10 Z5-IC10 DELETED 74121N

11 Z5-IC11 1 INT. CRKT. HEX INVERT 74LS04N T

I

SN74LS04N

66
. D . D . 1

ATE CORY NO.

DEC

7-

77 PARTS LIST- RF LEV EL, PROCESS CARD (2500) DATA i

DSGN QTY DESCRIPTION VALUE M FG PART NUMBER

1 2 5 - K

1

n SOCKET ROUND DIP 8 PIN SAMT

94* 25-K2 1 SOCKET DUAL IN-LINE DP 16 PIN SAMT IC- 316-SGG

3 Z5-K3 SAME AS I< 1 8 PIN

4 Z5-J1 2 JACK JUMPER IC PIN 1 PIN GARY AA-C

5 Z5--J2 SAME AS J1 1 PIN

6 Z5-T1 1 TERM TEST POINT 1 PIN GARY AA-C

(ATE GORY WO. 10 HARDWARE

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 25-B1 1 PC BRD-RF PROCESS CRKT NBS PC-500

ATEGORY NO. 12 SUBASSEMBLIES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 2 5 1 RF PROCESS PC CARD NBS 250 0
L.D. D 1 DEC 77 PARTS LIST- NOISE ADD CARD (ZGOO) DATA 7

.

f

CATEGORY NO. 1 RESISTORS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z6-R11 6 RES FXD MF 1% 1/ 4W 10 OHM CORG NC5 •

2 Z6-R12 SAME AS Rll 10 OHM

3 Z6-R13 3 RES FXD MF 1% 1/4 W 150 OHM CORG NC 5

f 4 Z6-R14 3 RES FXD MF 1% 1/4W 2 7 OHM CORG NC5

5 Z6-R15 3 RES FXD MF 1% 1/ 4W 3 0 OHM CORG NC5 i

i 6 Z6-R21 SAME AS Rll 10 OHM 1

7 Z6-R22 SAME AS Rll 10 OHM

8 Z6-R23 SAME AS R13 150 OHM > 9 Z6-R24 SAME AS Rl

4

27 OHM

10 Z6-R25 SAME AS R15 30 OHM

11 Z6-R31 SAME AS Rll 10 OHM

12 ZC-R32 SAME AS Rll 10 OHM

13 Z6-R33 SAME AS Rl

3

150 OHM f 14 Z 6— R3 4 SAME AS R14 2 7 OHM

15 Z6-R35 SAME AS Rl

5

3 0 OHM

!

1

I

f ATTrADV Kin PAD Af TT>nDC

£

i

i U/il LiVaU X\JL 1NU* z UPu: X lUnu

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

f 1 Z6-C11 6 CAP CERAMIC 10 PF '.5 2 Z6-C12 SAME AS Cll 10 PF f 3 Z6-C21 SAME AS Cll 10 PF

4 Z6-C22 SAME AS Cll 10 PF

5 Z6-C31 SAME AS Cll 10 PF 1 6 Z6-C32 SAME AS Cll 10 PF

l

n ATrcc.r v Ki r\ (Z « P P M M P P TO P ^

f

LiU LbUhi HU* O

3 DSGN QTY DESCRIPTION VALUE MFG PART NUMBER 'p

l Z6-J1 5 JACK PANEL RECEPTACLE EFJ 142- 0296-00])

2 ZG-J2 SAME AS J1 c 3 ZG-J3 SAME AS J1 i

68
Id .D . 1 DEC 77 PARTS LIST- NOISE ADD CARD (Z600) DATA 7 1 4 Z6-J4 SAME AS J1

5 Z6-J5 SAME AS J1

6 Z6-P1 2 PLUG RIGHT ANGLE CLAMP EFJ 14 2-0222-001

7 Z6-P2 SAME AS PI

8 Z6-P3 3 PLUG RT ANGLE TO . 141 GSM OSM 221-1

9 Z6-P4 SAME AS P3

10 Z6-P5 SAME AS P3

11 Z6-P6 1 PLUG SMA TO .141 GSM OSM 201- 1A

jATE GORY NO. 10 HARDWARE

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

i Z6-H1 1 PLATE ALUM 4.25 X 5.5 1/16 NBS

2 Z6-H2 2 BRAKET RIGHT ANGLE 1/16 NBS

3 Z6-H3 SAME AS H2 1/16

4 Z6-H4 4 MINI BOXES (MODIFIED) POMA

5 Z6-H5 SAME AS- H4

6 Z6-H6 SAME AS H4

7 Z6-H7 SAME AS H4

[ATEGORY NO. 12- SUBASS EMBLIES

. DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z 6 1 NOISE ADD CARD NBS Z600

2 Z6-S1 1 3 WAY POWER DIVIDER MERR PDM-30-55

3 Z6-A1 1 AMP 10-500 MHZ AVNT UDP-531

4 Z6-T1 1 ATTENUATOR MINI PAD 5 dB MID MTT-33 3-5

5 Z6-T2 1 ATTENUATOR MINI PAD 10 dB MID MTT-33 3-10

,ATEGORY NO. 13 MISCELLANEOUS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z6-L11 3 INDUCTOR .15 UH DLVN 1537-00

2 Z6-L21 SAME AS Lll . .15 UH

3 Z6-L31 SAME AS Lll .15 UH

174/UG 4 Z6-X1 1 COAX MINI ( RG-174

)

3 BELD

5 Z6-X2 1 COAX SEMI-RIGID (.141) 4 UN IF

6 Z6-X3 1 COAX SEMI-RIGID (.141) 1.25 UN IF

I

l

69
L.D.D 1 DEC 77 PARTS LIST- INPUT CONTROL PC CARD (Z700)

CATEGORY NO. 1 RESISTORS

DSGN QTY DESCRIPTION VALUE MFG PART

1 Z7-R1 13 RES IXD CAR'S 5% 1/ 4 Vi 1.5K OHM AB CE

2 2 7 - R 2 SAME AS Rl 1 . 5K OHM

3 Z7-R3 SAME AS Rl 1.5K OHM

4 Z7-R4 SAME AS Rl 1.5K OHM

5 Z7-R5 SAME AS Rl 1.5K OHM

G Z 7- R6 SAME AS Rl 1.5K OHM

7 Z7-R7 SAME AS Rl 1 . 5K OHM

8 Z7-R8 SAME AS Rl 1. 5K OHM

9 Z7-R9 SAME AS Rl 1.5K OHM

10 Z7-R10 SAME A3 Rl 1 . 5K OHM

11 Z7-R11 SAME AS Rl 1.5K OHM

12 Z7-R12 SAME AS Rl 1.5K OHM

13 Z7-R13 2 RES IXD CARD 5% 1/ 4K 12. OK OHM AB CB

14 Z7-R14 SAME AS R13 12. OK OHM

15 Z7-R15 1 RES FXD CARD 5% 1/ 4v; 1 . 2K OHM AB CL

16 Z7-R16 SAME AS Rl 1.5K OHM

17 Z7-R17 4 RES FXD CARB 5% 1/4W 2. 2K OHM AB CB

18 Z7-R18 NOT USED

19 Z7-R19 2 RES. FXD WW 5% 3V7 2. 2K OHM

20 Z7-R20 SAME AS Rl

7

2. 2K OHM

21 Z7-R21 NOT USED

22 Z7-R22 SAME AS R19 2. 2K OHM

23 Z7-R23 12 RES FXD HF 1% 1/4W 30 .IK ATT f K Urir: CRNG NC 5

24 Z7-R24 SAME AS R23 30 . IK OHM

25 Z7-R25 SAME AS R23 30 .IK OHM

26 Z7-R26 SAME AS R23 30 . IK OHM

27 Z7-R27 SAME AS R23 30 .IK OHM

28 Z7-R28 SAME AS R23 30 .IK OHM

29 Z7-R29 SAME AS R23 30 . IK OHM

3u Z7-R30 SAME AS R23 30 . IK OHM

31 Z7-R31 SAME AS R23 . 30 . IK OHM

32 Z7-R32 SAME AS R23 30 .IK OHM

33 Z7-R33 SAME AS R23 30. IK OHM

34 Z7-R34 SAME AS R23 30 . IK OHM

I

70
Z . D . D . 1

CATEGORY NO.

DEC

2-

77 PARTS LIST- INPUT CONTROL PC CARD ( Z700 ) DATA 8

DOG LSI QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z7-C1 3 CAP HI -K LONG 50V 1.0 UF SPRG 5C023105XG2505

2 Z7-C2 SAME AS Cl 1.0 UF

3 Z7-C3 SAME AS Cl 1.0 UF

4 Z7-C4 1 CAP TANT 35V 1.0 UF

5 Z7-C5 2 CAP DISK .01 UF

6 Z7-C6 1 CAP TANT 25V 10.0 UF

7 Z7-C7 SAME AS C5 .01 UF

raTpnnpv Kin 3- QTPi F C

DSGN QTY DESCRIPTION

wJ X ivO

VALUE M FG PART NUMEER

i Z7-Q1 2 TRANSISTOR SILICON NPN 2N4922 RCA 2N4922

2 Z7-Q2 SAME AS Q1 2N4S22

rs'Frmcv Kin c;_ n T nf’TiT rnc

’ juvivi • 1 In 1 u 1 u JJ N-' X i\v^O 1 1 J

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Z7-IC1 2 INT. CRKT. QUAD NAND 74LS00N TI SN74LS00N

2 Z7-IC2 1 INT. CRKT. HEX INVERT 74LS04N T

I

SN74LS04N

nJ Z7-IC3 3 INT. CRKT. ONE SHOT 7 4 12 IN TI SN74 12 IN

4 Z7-IC4 SAME AS IC 3 7 4 12 IN

5 Z7-IC5 SAME AS IC3 7 4 12 IN

6 Z7-IC6 2 IC 4 BIT DATA MULTPLX 74LS157N TI S N74 LSI 57 N

7 Z7-IC7 SAME AS IC6 74LS157N

8 Z7-IC8 1 INT. CRKT. QUAD NOR 74LS02N TI SN74LS02N

Q-/ Z7-IC9 SAME AS IC1 74LS00N

10 Z7-IC10 1 INT. CRKT. QUAD LATCH 74LS74N TI SN74LS74N

11 Z7-IC11 1 IC HEX INVERT (NOT LS) 7404N TI SN7404N

12 Z7-IC12 1 IC HEX INVERTER (OC) 7406N TI SN7 406N

13 Z7-IC13 3 INT. CRKT. OP AMP OP-0 5 MONO GP-05

14 Z7-IC14 SAME AS IC13 OP-0 5

15 Z7-IC15 SAME AS IC13 OP-0 5
L.D.D. 1 DEC 77 FARTS LIST- INPUT CONTROL PC CARD (Z700) DATA 8

CATEGORY NO. 6 CONNECTORS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

Z7-J1

Z7-J2

NOT USED

JACK 1C DUAL IN-LINE 14 PIN S AMT I C-314-SGG

CATEGORY NO. 10-

DSGN QTY

HARDWAREDESCRIPTION VALUE

1 Z7-B1 1 PC BRD FOR CNTROL CRKT

2 Z7-H1 2 SCREW NYLON 4-40

3 Z7-H2 2 NUT NYLON 4-40

4 Z7-H3 2 WASHER MICA INSULATOR

MFG PART NUMEER

NBS PC-700

1/2

CATEGORY NO. 12 SUBASS EMBLI LS

DSGN QTY DESCRIPTION VALUE MFG

1 Z7 1 INPUT CONTROL PC CARD NBS

PART NUMBER

Z7G 0

72
5.10 WIRING LIST

C0NTR0L/RF UNIT

FRONT PANEL CONNECTIONS

D>

2

Z700-20 NA1 LED 3> Z500-26 METER X.01

Z700-28 PGM 64 32 +5V (POWER SUPPLY) AC ON LED

3 Z700-18 NA2 LED 33 FILTER BAND SWITCH IN

4 Z700-40 PGM 32 34 R.F. AMP 1 OUT

5 35 REF ATN OUT

6 Z700-34 PGM 16 36 TO PGM ATNR

7 37 R.F. AMP 2 IN

8 Z 700-33 PGM 8 38 R.F. AMP 2 OUT

9 39 XTAL DET. OUT

10 Z700-27 PGM 4 40 Z 500-28 METER X.1

11 * 41 Z500-30 METER XI

12 Z700-39 PGM 2 42 Z500-23 METER RANGE

13 43 Z 500-43 OFFSET POT

14 Z700-43 PGM 1 44 Z500-3 9 OFFSET POT

15 Z700-49 LOAD 45 Z500-41 METER XI

16 Z700-51 LOAD 46 Z500-27 METER RANGE

17 SIMUL. STAR OUT 47 Z500-32 METER18 GND (PWR SUPPLY) 48 Z500-34 METER*

19 Z700-48 HOLD/Bypass 49 Z400-44 "I" BUSS

20 PGM ATN S-8 (LED) 50 Z500-49 RESET

21 PGM ATN S-4 (LED) 51 Z400-47 OVERLOAD LED

22 PGM ATN S-2 (LED) 52 J650-8

23 PGM ATN S-1 ' (LED) 53 J 650-7

24 Z400-43 REF ATN LED 54 J650-6

25 Z400-48 RF ON LED 55 J 650-5

26 56 J650-1*

27 AC LINE FILTER 57 J 6 50-5

28 AC LINE FILTER 58 J650-2

29 FUSE BLOCK -B 59 J650-1

30 FUSE BLOCK -F 60 TO DIRECTIONAL-COUPLER IN

61 R.F. OUTPUT

* Front Panel connections listed above are designated on other

diagrams by a Triangular Flag * See also Figure 15.
WIRING LIST

J-400

ANALOG GND 1 2 ANALOG GND

+36V 3 4 +36V

+ 24V 5 6 + 24V

7 8 PGM ATN 8+

i 9 10 PGM ATN 8-

REF ATN -2 1

1

12 PGM ATN 4+

REF ATN -1 13 14 PGM ATN 4-

Z500 -50 15 16 PGM ATN 2+

R.F. ON -2 17 18 PGM ATN 2-

Z500 -52 19 20 PGM ATN 1 +

R.F. ON -1 21 22 PGM ATN 1-

1 23 24

25 26

27 28 i 29 30

'

31 32 1 Z500 -55 33 34

1

j

35 36

37 38 Z700 -31

4>

39 40 Z700 -25

FP 41 42 Z700 -37

FP 43 44 Z700 -41

Z500 -47 45 46 Z700 -46

FP 51 47 48 FP

Z700 -42 49 50 Z700 -50

Z700 -36 51 52 Z700 -30

Z700 -56 53 54 Z700 -54

J650 -20 55 56 J651 -13

+ 5V 57 58 +5V

GND 59 60 GND i

74
WIRING LIST

J-500

ANALOG GND 1 2

3 4

5 6

7 8

9 10

SHIELD XTAL DET. 11 12

XTAL DET, 13 14

15 16

17 18

19 20

21 22

FP 23 24

25 26

FP 27 28

29 30

31 32

33 34

-15V 35 36

+ 1 5V 37 38

FP 4?> 39 40

FP 4> 41 42

FP 4> 43 44

Z700 -52 45 46

d-p- Oo ^45 47 48

FP 49 50

51 52

53 54

Z400 -33 55 56

+5V 57 58

, GND

i 59 60

ANALOG GND

+ METER

-METER

Z400 -15

Z400 -19

+ 5V

GND

75
WIRING LIST

76
ETMS

CONNECTOR

WIRING

LIST

79

t yp

Figure 9. Z400 PC Assembly Drawing.

— - 15 V

.001 uF —I (

13 <-

<

j,R2 >IOO/t —r 4

3 OP-05/8 O•— A

R8 i I5K >

‘T R7

1 20K

“A" fOF

DETECTED RF OVERLOAD)

SET nj f'

— 15 V

R II, 200K

NOISE SOURCE ON 45^-

49

1C - 506 555

~T5

I CI3_ _ SR20 —1— 100

-p > IOK ~ pp J.%

LOG REFERENCE SOURCE

!?

IC-504 80 48 LOG CIRCUIT

->23

CI7 DELAY 'I JTAJ

S’ | -O...CL.TU..

| NATIONAL BUREAU OF STANDAXDS

SCHEMATIC , RF LEVEL PROCESS ScAB-D

’OK EARTH TESlMiWfll. acasv “» rsTe<»

-OO.L jH TTPt •CALt ,

"

.0 -ok kcaa. np«,hT!mu «o

0..0 .•

1 1 27^+90 -ZSOO

Figure 10, Z500 Schematic Circuits 83

Figure 11 Z500 PC Assembly Drawing.

NATIONAL BUREAU OF STANDARDS

ASSr, RF LEVEL PROCESS BoAfc-0

MOOIL •o.l« V/

°r*yr»‘rr>/*

/

c "“*** ~0"c '

• WSHlTffO •>

„INT"l,o

1 1 2766460 -Z SOO

85

Figure 12. Z700 Schematic Circuits.

ASSr, INPUT CONTROL CARD

MOD... •CAL.

C.C.C.

.““'TT'D *'

1 1 2766480- 7/00

Figure 13. Z700 PC Assembly Drawing.

NOISE

DIODE

l;Ii 1

=«= o ro

LU D_ (— »— <C ro

oo

9p 2: 2 O

uo

ac 1—'00

lu rj 2: 1— o ‘=t- <5-0-

ce:

<=C co ooc

r— oct: 1— < z 2T OO

00 o =tfc ocl

c ^o L

LU

OC9^ LU S 3 o o cc Od , =3 Lu t= O <

1/1 1

LT) 2:oC_J _l

CO

O 1 r

C\J 1 •~3 C\J 1 •~3 0 1 2: 0 O O r^ 2: O 2: QC 0 O

Lu C's! QC cc

Lu

M Lu

OsJI C\J •a1 oor-.

90

Figure

14.

Z600

Block

Diagram.

o 3

cuc

CO a.co

l- lb mvu3

CO

U.

91

ETMS

FRONT

PANEL

WIRING ’
Z700

Z700

Z700

Z700

Z700

Z700

19

21

It 1 M

O

S65? ©S' A- C\J LA ^ %

vO Eh <$

>15

•17

ii i

it -O

<3

°

^4/ o£C

" 0

" S656 ©

VO r- la

VO EH <

A> Eh S

See Wiring Table for J655

w

to 0 x

O h023 H (DS

C3 4-> E!H O

«aj O Eh >

12

14

t (\i • LTV 3*. T3 vO < -»-> *~3 a ^

IA

LAVO

A)

< 4-> ^ CO

AC Power

See Power Supply Diagram

0 O 3

< 01p

See Wiring Table for J 651 LA

vO

•“0

See Wiring Table for J 650

o

LA

vo

92
C\J c

oC\J

Lf>

tt

lo Qz ^i_i + C +1

Figure

17.

Control/RF

Unit

Primary

Power

Distribution.
6. MULTIPLEXER/DIGITAL VOLTMETER CONTROLLER

6.

1

Introduction

The digital voltmeter control circuits and input channel multiplexer are built into a flat package which is attached to the top of the digital voltmeter

(see fig. 18). This unit contains the control latches for the digital voltmeter

functions, the offset-voltage reference used with the power meter measurements

and the reed-relay analog multiplexer which provides 12 input channels for the

digital voltmeter.

The entire package is self-contained and replaces the top cover of the DVM.

No modifications to the DVM are required.

6.2

Specifications

Offset voltage reference

1 M.V. resolution programmed automatically by Channel #9.

Range. 3 ranges internally selected.

2.0 to 2.999 V for Type IV power meter

3.5 to 4.5 V for Type II power meter

4.5 to 5.5 V for HP 432 power meter

Analog Multiplexer

12 input channels

Analog channels Low Thermal EMF Reed Relay, 2 pole guarded.

Control commands are generated by the ETMS control/rf unit or ETMS calculator interface.

6.

3

Y 100 MUX/DVM Control Card (Schematic, Figure 20)

The control circuits are on the Y 100 printed circuit card. Incoming

command data from the ETMS control/rf unit on the four low-order bits are connected to three four-bit latches (IC-104, 105, and 106) which store the

function data. The DVM range is stored in IC-106*, the DVM function (dc

*Note: The D or "8" latch is not used to program Range, but instead actuates

the DVM "HOLD." This allows the DVM range control codes 16, and 19 thru 23

to program the DVM range but leave the DVM RATE in the free-running mode.

94
1

95

Figure

18.

Multiplexer

/DVM

Unit.
volts; filter) in IC-105 and the input multiplexer channel IC 104. The function

select data lines 5, 6, and 7 are decoded in IC 101. The output of this decoder

enables the CTL pulse to the selected latch strobe to store the output data on

the four data lines.

One gate of IC-103 acts as an OR gate to feed the decoded CTL pulse to

trigger the ready-flag one-shot, IC 107. Any one of the three decoded CTL

pulses cause the one-shot to return a ready-flag to the ETMS control/rf unit

where it is combined with the flags from that chassis. Note: This flag

circuit returns a flag for DVM control commands. The DVM DATA READY flag

circuitry is connected to input I/O select code #2. When the input channel

multiplexer function is selected, the enabled CTL pulse triggers the one-shot,

IC 108, which generates a pulse to disable the multiplex driver during the

time the MUX data latches are changing. This opens the previously selected

input channel relay a short time before the next selected input channel relay

closes thus avoiding shorting two input channels together.

Inverter driver IC's 110 and 111 drive the front panel LED indicator lights.

The range information from the voltmeter must be converted to a corresponding exponent digit to be compatible with the calculator interface. This is

accomplished by the adder, IC 120—which adds + 13 hexidecimal or modulo 16 to

the range data and ignores the carry bit in the result. The DVM interface, I/O

select code #2 has the decimal point code hard wired between DVM data digits 3

and 4 at the jack on the rear panel (J352). This arrangement permits inputing

the DVM data without any extra processing required.

6 . 4 Y 200 Offset Reference Voltage Card (Schematic Figure 22)

The offset voltage reference is a programmable D/A converter which accepts

DVM data when input channel #9 is selected so that the offset voltage is automatically set to the voltmeter reading.

6.4.1 Digital Circuits (See Also Figure 19)

The decoder IC-205 enables the DVM data ready signal in IC-206 when the

input channel multiplexer is set to channel #9. This data ready pulse triggers

the one-shot, IC-207 to strobe the three most significant digits of the DVM

reading currently on the data lines into the DAC.

96
33o

31O'

3300 o

_l

o

oI

CTi O

00 o

LO

97

Figure

19.

Data

Flow-
6.4.2 Reference Voltage Circuits (Schematic, Figure 22)

The reference voltage used as an offset voltage is the combination of

a fixed (coarse ref.) voltage and the programmed DAC voltage. The DAC voltage

is 0 to 10 volts output but is divided by 10 before being added to the coarse reference voltage thus giving 1 millivolt resolution.

The output from the internal voltage standard of the DAC is divided in the

resistive divider providing three jumper selectable voltages 4.5, 3.5, and 2.0

volts for use as the coarse reference voltage. Amplifier-follower IC-202 drives

the coarse reference circuits buffering them from the voltage standard. The

output of this buffer is added to the divide by 10 output of the DAC in R8 and

R9 and the summing amplifier IC-203. Inverter amplifier IC-204 drives the

offset voltage reference circuits.

When input channel #9 is selected, the coarse reference is connected to

the DVM "LO" input, and the rf power meter to the DVM "HI" input so that the

DVM reads the difference of the two voltages. This DVM reading is strobed into

the DAC so that the output voltage of the offset reference circuits matches the

power meter voltage within ± 1 millivolt. Normally the rf power is turned off

while the offset reference voltage (DAC) is set equal to the power meter voltage.

Then small voltage changes between the power meter input and the offset reference

can be measured with high resolution with a good 5 or 6 digit DVM. These readings

are made on input channel # 10.

6.4.3 Adjustment Y 200 Voltage Offset Reference (Refer to Figures 22 and 23)

The adjustment procedure for this circuit involves programming the digital

to analog converter (DAC) to zero and adjusting the dc offset to zero; grounding

the input to the course reference buffer and then "zeroing" the dc offset of the

buffer amplifier, summing amplifier and the inverting amplifier. Then programming the DAC to a known voltage and adjusting the DAC gain to obtain that voltage

out.

The following st^p-by-step procedure refers to an external voltmeter;

however, the procedure is arranged sc that the DVM can be used.

Adjustment Procedure:

1. Disconnect rear DVM input cable J-204. Disconnect the power bridge

cable J-354 on back of multiplexer.

98
2. Program input channel #9 using control code //102. Connect a test lead

to short together the HI and LO input terminals on the front of the

DVM. Place the DVM in manual control (but leave the data output button

on) and turn the Rate knob fully clockwise. Adjust the DVM dc offset

trimmer to obtain a zero reading on the DVM. Rotate the Rate knob

fully counterwise (Ext. position) to lock the zero reading on the DVM

display. Since input channel // 9 was selected, the DAC is r.ow programmed

to zero reading. Execute control code #96 to disable the multiplexer

and lock the DAC reading. Rotate the Rate control fully lockwise to

enable the DVM.

3. Connect external voltmeter to the HI and LO input terminals of the

multiplexer to read the DAC output voltage. Adjust the DAC dc offset,

R16, for a zero reading on the voltmeter.

4. Remove Jumper "C" power meter select and ground the common pin.

Connect the external voltmeter to TP-1 and ground. Adjust the buffer

amplifier dc offset, R18, to obtain a zero reading on the voltmeter.

5. Both inputs to the summing amplifier are now zero volts. Connect the

external voltmeter to TP-2 and adjust the summing amplifier dc offset,

R19, to obtain a zero reading on the voltmeter.

6. Move the external voltmeter to TP-3. Adjust the inverter amplifier dc

offset, R20, to obtain a zero reading on the voltmeter.

7. Set DVM to 10 volt scale and the Rate knob fully clockwise. Execute

control code #102 (input channel 9) to enable the DAC. Connect the

DVM LO input to ground with a test lead and the DVM HI input to + 5 volts

on the power supply. Rotate the Rate control fully counterclockwise

and then execute control code #96 to lock the DAC. Write down the DVM

reading. Rotate the DVM Rate control fully clockwise. Connect an external voltmeter to input channel #5 HI and LO inputs to read the

DAC output. Adjust the DAC gain, R17, to obtain the voltage written

down from DVM in the last measurement.

8. Repeat step numbers 2 and 3 to recheck the DAC zero.

9. Move the external voltmeter to TP-3 and verify that all amplifiers have

zero offset.

10. Remove test leads from DVM front panel input. Disconnect external

voltmeter if one was used.

11. Replace power-meter select off-voltage jumper to "C" (if Type IV power

meter is used). Reconnect J204 in rear of DVM. Reconnect J354 on rear

of mux.

99
12. Load equipment check program and run equipment checks.

6.5 Y 300 Input Channel Multiplexer (Schematic, Figure 24)

6.5.1

Control Circuits

This printed circuit board contains a one-of-sixteen decoder-driver, IC-301.

The data stored in the multiplexer latches on the Y 100 board is decoded to

energize the selected reed relay coil. When the data changes, the CTL pulse is

used to temporarily disable the decoder to avoid accidently shorting two multiplexer input channels together.

6.5.2

Analog Multiplexer

Each analog input channel is switched to the HI and LO inputs of the DVM

through a two-pole shielded reed relay having low thermal-emf contacts. The

inputs to each channel relay are pin and jack connections, so that the channel

assignments could be changed should a relay fail. Input channel //ll is an auxiliary input from J-357, but could be used as a spare input if needed. The

program input channel assignments would also have to be changed. (See Section 6.

6.5.3

Multiplexer Input Channel Assignments

The input channel assignments are given in the following table.

Control

Input Channel Function Code

0 Hi/Lo Shorted-DVM zero 111

1 Temperature 110

2 Dew point temperature 109

3 rf amp. power supply 108

4 Sim. Noise-Add Ref. Voltage 107

5 DAC output 106

6 XTAL Detector 105

7 DAC Ref. Voltage 104

8 Power Meter 103

9 *Hi-Pwr Meter, Lo Coarse Offset 102

10 AV Voltage Power Measurement 101

11 auxiliary channel 100

12 open circuit 99

13 open circuit 98

14 open circuit 97

15 open circuit 96

* Enables DAC programming.

100
6 . 6 Troubleshooting

Manually program each input channel with the DVM in manual mode through the

various control codes given in the previous table noting if the voltmeter reads

the correct voltage. Check that the input cables are connected to the correct

jacks on both ends. Check that the DVM rear panel input J204 is properly con- nected.

If a multiplexer relay fails to operate properly, the input channels can be

changed. The analog multiplexer input leads are plugged into pin-jacks at each

channel relay. These leads are long enough that they can be plugged into the

auxiliary input channel (#11, or #0 if necessary) if a particular channel relay

fails.

To substitute a multiplexer channel, move the two input leads to the new

channel pin-jacks and add these two program lines to the measurement program

after the program is loaded.

The program modifications are in the FNX(Q) function (line numbers refer

to the X.03 subroutines).

Add: 75 If Q# (old channel control code) then 80

76 Q = (new channel control code).

Then the system should operate normally. NOTE: If the program is saved with

the changes installed, the Program Revision Label (line number 50) should be

updated.

101
6.7 PARTS LIST - MUX/DVM CONTROLLER f L.D.D. 1 DEC 77 PARTS LIST- CONTRL/MULTPLX/REF UNIT (Y) DATA , 6

CATEGORY NO. 4 DIODES -

I DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

j

— ! 1 Y-Dl 12 LED INDICATOR LIGHTS 5 VOLT DIAL 550-0506

2 Y-D 2 SAME AS Dl

3 Y-D-3 SAME AS Dl

4 Y-D4 SAME AS Dl

5 Y-D5 SAME AS Dl

6 Y-D6 SAME AS Dl

7 Y-D 7 SAME AS Dl

8 Y-D8 SAME AS Dl

9 Y-D9 SAME AS Dl

10 Y-D10 SAME AS Dl

11 Y—Dll • SAM E AS Dl

12 Y-D12 SAME AS Dl

ATE GORY NO. 6- CONNECTORS-- —

if- DSGN QTY DESCRIP TION VALUE MFG

I PART NUMBER

if 1 Y-Pl 2 PLUG (FOR IC SOCKET) 14 PIN 3M 3406

2 Y-P2 WOT USED 11 3 Y-P3 SAME AS PI 14 PIN 1 4 Y-P4 23 PLUG WIRE WRAP 1 PIN SAMT TS- 120-G-A

5 Y-P 5 SAME AS P4 1 PIN I 6 Y-P6 SAME AS P4 1 PIN 11 7 Y-P7 SAME AS P4 1 PIN 1

8 Y-P8 SAME AS P4 1 PIN

9 Y-P9 SAME AS P4 1 PIN |

10 Y-P10 SAME AS P4 1 PIN ll ii ; Y—PI 1 SAME AS P4 1 PIN

12' Y-P12 SAME AS P4 1 PIN • I 13 Y-P13 SAME AS P4 1 PIN

14 Y-P14 SAME AS P4 1 PIN

15 Y-P15 SAM E AS P4 1 PIN

16 Y-P16 SAME AS P4 1 PIN j

17 Y-P17 SAME AS P4 1 PIN 11 18 Y-P18 SAME AS P4 1 PIN

19 Y-P19 SAM E AS P4 1 PIN ii 2u Y-P 20 SAM L AS P4 1 PIN

1 21 Y-P21 SAME AS P4 1 PIN ll

102
L.D .D. 1 DEC 77 PARTS LIST- CONTRL/MULTPLX/REF UNIT (Y) DATA

22 Y-P22 SAME AS P4 1 PIN

S 23 Y-P23 SAME AS P4 1 PIN

24 Y-P24 SAME AS P4 1 PIN

i 25 Y-P25 SAME AS P4 1 PIN

26 Y-P26 SAME AS P4 1 PIN

27 J1-J99 NOT USED

! is Y-J100 1 CONN PC EDGE (Y100) GO PIN AM PH 261-10030-2

29 Y-J200 1 CONN PC EDGE (Y200) 6 0 PIN AMPII 261-10030-2

30 Y-J 300 NOT USED ( J300-J 350)

31 Y-J 351 2 COimN BLUL RIBBON I/O 50 PIN AM PH 57-40500

32 Y-J 352 SAME AS J 351 50 PIN

33 Y-J 35

3

1 CONN BLUE RIBBON I/O 14 PIN AM PH 57-40140

34 Y-J 354 4 CONN PANEL RECEPTICLE 5 PIN VI KG VR5/4AB13

1 35 Y-J355 SAME AS J354 5 PIN

i 36 Y-J356 SAME AS J3 54 5 PIN

37 Y-J357 SAME AS J354 5 PIN

:ategory no. 7 “Terminals

DSGN CTY DESCRIPTION VALUE MFG PART NUMEER

1 Y-Tl 15 TERMINAL TEFLON I N S U L CAMS 45043520103

2 Y-T2 SAME AS Tl

3 Y-T3 SAME AS Tl

4 Y-T4 SAME AS Tl

5 Y-T5 SAME AS Tl

6 Y-T6 SAME AS Tl

7 Y-T7 SAME AS Tl

8 Y-T'8 SAME AS Tl

9 Y-T9 SAME AS Tl

10 Y-T10 SAME AS Tl

11 Y-Tll SAME AS Tl

12 Y-T12 SAME AS Tl

13 Y-T13 SAME AS Tl

14 Y-T14 SAME AS Tl

15 Y-T15 SAME AS Tl

16 Y-T16 3 TERM STRIP ft I RE WRAP 25 PIN SAMT SS-120-G-2

17 Y-T17 SAME AS Tl6 25 PIN

18

1

1

1

Y-T18 SAME AS T16 25 PIN

1

I

! .ATE GORY NO . 8- TOILS

DSGN OTY DESCRIPTION VALUE MFG PART NUMEER

i 1 Y-Sl 1 SWITCH AC POWER DPDT ALCO MSTL-20 6N

i

i

103
L.D.D. 1 DEC 77 PARTS LIST- CONTPL/MULTPLX/REF UNIT (Y) DATA 16

CATEGORY NO. 10 HARDWARE

DSGN C'TY DESCRIPTION VALUE MFG PART NUMBER

1 Y-Hl 1 PLATE MOUNTING .125 ALUM NBS 16W X 13

D

2 Y-H 2 1 PANEL INDICATOR .125 ALUM NBS 7.5W X . 25H

3 Y-H3 1 PLATE BACK UP (H2) .125 BAKL NBS 7.5W X . 2 5H

4 Y-H 4 1 PANEL REAR (CONNECTORS ) .125 ALUM NBS 1 5VJ X . 2 5H

, 5 Y-H 5 1 COVER FORMED METAL 1/16 ALUM MBS 16W XI 3 L XI

6 Y—II

G

1 STRIP REINFORCING (£15) .125 A.LUM NBS 16B X . 5W

7 Y-H 7 1 STRIP REIN FORCING (H5) .125 ALUM NB S 10L X . 5

W

8 Y-H 8 4 STAND-OFF (Y3U0 CARL) ALUM NBS . 5L CYBINBC

9 Y-H 9 SAME AS H8 ALUM

10 Y-II10 SAME AS HO ALUM

11 Y-Hll SAME AS H8 ALUM

61

CATEGORY NO. 12- SUBASS EMBLI USDS Ci>. rpv

/ 1 x DESCRIPTION VA] MFG PART NUMBER

1

2

3

4

5

Y-Ml

Y-M2

Y-Yl

Y-Y2

Y-Y3

1

1

1

1

POWER SUPPLY MODULAR

POWER SUPPLY MODULAR

CONTRL/MULT PLX PC CARD

BRIDGE REF PC CARD

ANALG MULT PLX PC CARD

5 VOLT EMI

+-1 5 VOLT ED

NBS

NBS

NBS

ES51000-K2

527

Y100

Y2 0 0

Y300

)

6

:

CATEGORY NO. 13- -MI SC ELL AN ECUS

DSGN QTY DESCRIPTION VALUE MFG PART NUP

1 Y-Al 1 SOCKET (FOR Ml) SEMI K2

2 Y-A2 1 FUSE/FILTER/AC SOCKET CROM 6J4

3/ Y-A3 1 CABLE RIBBON (P1-P3) 16 ALPH 3580/14

4 Y-A4 2 CABLE COAXIAL MIN. 2 4 BELD RG174/U

5 Y-A5 SAME AS A

4

24

i

104
I 1 DEC 77 PARTS LIST- CONTRL/MUT'PLX CARL (Y100) DATA 13

• D • D •

iiATEGORY NO. 1-

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1

1 1 Yl-Rl 1 RES FXD CARB 5% 1/4VJ IK OHM AB CB

i 2 Y1-R2 1 RES FXD CARB 5% 1/4W 3 3K OHM AE CB

| 3 Y1-R3 2 RES FXD CARB 5% 1/4W 13K OHM AB CB

4 Y1-R4 SAME AS R3 13K OHM

! 5

1 Y1-R5 1 RES FXD CARB 5% 1/4W 10K OHM AB CB

1

'

!

•

jjATEGORY NO. 2- —CAPACITORS

DSGN QTY DESCRIPTION VALUE MFG PARI NUMBER

1 Yl-Cl 3 CAP HI— K MONO SOV 1.0 UF SPRG 5C02 3105X0 2505

3

2 Y1-C2 SAME AS Cl ' 1.0 UF

3 Y1-C3 SAME AS Cl 1.0 UF

1 4 Y1-C4 1 CAP TANT 10

V

120 UF

5 Y1-C5 3 CAP CERAMIC .1 UF

6 Y1-C6 SAME AS C5 .1 UF

7 Y1-C7 SAME AS C5 .1 UF

8 Y1-C8 3 CAP TANT 25V 10 UF

9 Y1-C9 1 CAP TANT 35V 1.0 U E 10 Y1-C10 SAME AS C8 10 UF

11 Yl-Cll SAME AS C8 10 UF

n t crn t'pc Hi k

L

j U

K

x MU. 5 U 1 Uii J

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1

i i Yl-ICl 1 IC BCD TO DEC DECODER 7442N TI SN7442N

2 Y1-IC2 1 INT. CRKT. QUAD NOR 74LS02N T

I

SN74LS02N

! 3 Y1-IC3 1 IC TRIPLE INPUT NOR 74LS27N TI SN74LS27N

! 4 Y1-IC4 3 IC QUAD FF (D) OC 74LS175N TI SN74LS175N

5 Y1-IC5 SAME AS IC4 7 4LS175N

6 Y1-IC6 SAME AS IC4 74LS175N

7 Y1-IC7 3 INT. CRKT. ONE SHOT 74121N TI SN74 121N

18 Y1-IC8 SAME AS IC7 74121N

'

I

i 105
,D.D 1 DEC 77 PARTS LIST- CGNTRL/MUTPLX CARD ( Y100) DATA 13

9 Y1-IC9 SAME AS IC7 74121N

10 Y1-IC10 2 IC HEX INVERTER OC 7 40 6 N T

I

SN7406N

11 Y1-IC11 SAME AS IC10 7 406N

12 Y1-IC12 NOT USED

13 Y1-IC13 NOT USED

14 Y1-IC14 1 IC HEX INVERTER 74LS04N T

I

SN74LSC4N

15 Y1-IC15 NOT USED

16 Y1-IC16 NOT USED

17 Y1-IC17 NOT USED

18 Y1-IC18 NOT USED

19 Y1-IC19 NOT USED

20 Y1-IC20 1 IC BINARY FULL ADDER 74LS283N TI SN74LS283N

I

If

CATEGORY NO. 6 CONNECTORS j DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

j

1 Y

1 -J 2 1 JACK IC DUAL IN-LINE 14 PIN SAMT IC-314-SGG

CATEGORY NO. 10-

DSGN QTY

•HARDWARE- i

DESCRIPTION VALUE

Yl-Bl 1 PC BRD-DVM CON/MUX CI\T

MFG PART NUMBER : — —— —- — — — — —• — — — — — NBS PC-100

CATEGORY NO. 12- SUBASSEMBLIES---

DSGN QTY DESCRIPTION VALUE

1 Y1 1 DVM CONT/MUX PC CARD

MFG

NBS

PART NUMBER

* II

I Y100
j.D.D. 1 DEC 77 PARTS LIST- BRIDGE REFERENCE CARD (Y200) DATA 14

;ategory no. i- RESISTORSDSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Y2-R1 1 RES FXD MF 1% 1/ 4W 20. OK OHM CCRG NC5

1 2 Y2-R2 1 RES FXD MF 1% 1/4W 15. OK OHM CORG NC5

’! 3 Y2-R3 2 RES FXD MF 1% 1/4W 10. OK OHM CORG NC5

4 Y2-R4a 1 RES FXD MF 1% 1/4W 27. 4K OHM CORG NC5

! 5 Y2-R4 b 1 RES FXD MF 1% 1/4W SELECTED CCRG NC 5

-j 6 Y2-R5 1 RES FXD MF 1% 1/4W 11. 3K OHM CORG NC 5

7 Y2-R6 1 RES FXD MF 1% 1/4W 14. 3K OHM CORG NC5

8 Y2-R7 1 RES FXD MF 1% 1/4W 19. 6K OHM CORG NC5

! 9 Y2-R8 2 RES FXD WW .025% 1/4W 2. 00K OHM ULTX 2 05A

10 Y2-R9 3 RES FXD ww .025% 1/4W 20 . OK OHM ULTX 205A

111 Y2-R10 1 RES FXD MF 1% 1/4W 1. 0 0K OHM CORG NC5

12

13

14

15

16

17

18

19

20

21

Y2-R11

Y2-R12

Y2-R13

Y2-R14

Y2-R15

Y2-R16

Y2-R17

Y2-R18

Y2-R19

Y2-R20

SAME AS R8 2.0 OK OHM

SAME AS R9 20. OK OHM

SAME AS R9 20. OK OHM

SAME AS R3 10. OK OHM

1 RES FXD CARB 5% 1/4W 12K OHM

4 RES VAR TRIM CERMET 20K OHM

1 RES VAR TRIM CERMET 50 0 OHM

SAME AS R16 20K OHM

SAME AS R16 20K OHM

SAME AS R16 20K OHM

AB CB

ERRS 3006W-1-203

BRNS 3006W-1-501

ATEGORY NO. -CAPACITORSDSGN QTY DESCRIPTION VALUE MFG

i i Y2-C1 2 CAP HI -K MONC 50V 1.0 UF SPRG

1 2 Y2-C2 6 CAP ELECYLYC 25V 4.7 UF

r 3 Y2-C3 SAME AS C2 4.7 UF

! 4 Y2-C4 SAME AS Cl 1.0 UF

| 5 Y2-C5 SAME AS C2 4.7 UF

1 6 Y2-C6 SAME AS C2 4.7 UF

7 Y2-C7 1 CAP CERAMIC DISK .001 UF

8 Y2-C8 SAME AS C2 4.7 UF

9 Y2-C9 SAME AS C2 4.7 UF

107
i

j

L.D .D . 1 DEC 77 PARTS LIST- BRIDGE REF ERE NCE CARD (Y200) DATA l|

CATEGORY NO . 5 INTEGRATED CIRCUITS- 1

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Y2-IC1 1 CONVTR D-A 3 DIG BCD DAC40 BB

- DAC4 0-12B-BCD

2 Y2-IC2 3 INT. CRKT. OP AMP OP-05C MONO OP-05C

3 Y2-IC3 SAME AS IC2 OP-05C 1' 4 Y2-IC4 SAME AS IC2 OP-05C

5 Y2-IC5 1 INT. CRKT. ONE SHOT 7 4 12 IN T

I

SN74121N

6 Y2-IC6 1 IC QUAD NAND (OC) 74LS00N TI SN74LSOON

7 Y2-IC7 1 IC BCD TO DEC DECODER 7 4 42N T

I

SN7 44 2N

CATEGORY NO. 7 TERMINALS

DSGN QTY DESCRIPTION VALUE MFC PART NUMBER

1 Y2-K1 4 SOCKET IC SINGLE STRIP 20 PIN SAMT SS-120-G-2

2 Y2-K2 SAME AS K 1 20 PIN

3 Y2-K3 SAME AS K 1 (-4 PINS) 16 PIN

4 Y 2-K 4 SAME AS K 1 (-4 PINS) 16 PIN

5 Y2-J1 8 JACK WIRE Vs RAP SOCKET 1 PIN

6 Y2-J2 SAME AS J1 1 PIN

7 Y2-J3 SAME AS J1 1 PIN

8 Y2-J4 SAME AS J1 1 PIN

9 Y2-J5 SAM E AS J1 1 PIN

10 Y2-J 6 SAME AS J1 1 PIN

11 Y2-J7 SAME AS J1 1 PIN

12 Y2-J8 SAME AS J1 1 PIN

CATEGORY NO

DSGN

1 Y2-B1

10 HARDWARE

QTY DESCRIPTION VALUE

1 PC BRD-BRIDGE REF. CKT

j j.

MFG PART NUMBER

NBS PC-200 it

CATEGORY NO. 12 SUBASSEMBLIES

DSGN QTY DESCRIPTION VALUE

1 Y 2 1 BRIDGE REF. PC CAPD

MFG PART NUMBER

NBS Y200

108
.D.D. 1 DCC 77 PARTS LIST ’ANALOG MULTIPLEXER CARD (Y300 D15

ATEGORY NO.

1

2

3

4

5

6

7

8

9

^0

11

2

DIODESDSGN QTY DES<CRIPTION VALUE MFG

Y3-D1 12 DIODE ;SILICON 1N4153 MOT

Y3-D2 SAME AS D

1

1N4153

Y3-D3 SAME AS D

1

1N4153

Y3-D4 SAME AS Dl 1N4153

Y3-D5 SAME AS D1 1N4153

Y3-D6 SAME AS Dl 1N4153

Y3-D7 SAME AS Dl IN 4 1 5 3

Y3-D8 SAME AS Dl 1N4153

Y3-D9 SAME AS Dl 1N4153

Y3-D10 SAME AS Dl 1N4153

Y3-D11 SAME AS Dl IN 4 153

Y3-D12 SAME AS Dl 1N4153

PART NUMBER

1N4 153

Ktegcry NO. 5-

DSGN QTY

1 Y3-IC1 1

INTEGRATED CIRCUITS

DESCRIPTION VALUE MFG

IC DECODE/DEMULTPLX OC SN74159N TI

PART NUMBER

SN74159N

ATEGORY NO. 6 CONNECTORS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Y3-J1 JACK IC DUAL IN-LINE 14 PIN SAMT I C-314-SGG

109
L.D.D. 1 DEC 77 PARTS LIST- ANALOG MULTIPLEXER CARD (Y300) D15

CATEGORY NO. 7 TERMINALS j DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Y3-J2 39 JACK WIRE WRAP SOCKET 1 PIN

2 Y3-J3 SAME AS J 2 1 PIN

3 Y3-J4 SAME AS J 2 1 PIN

4 Y3-J5 SAME AS J 2 1 PIN

5 Y3-J6 SAME AS J 2 1 PIN

6 Y3-J7 SAME AS J 2 1 PIN

7 Y3-J8 SAME AS J 2 1 PIN

8 Y3-J9 SAME AS J 2 1 PIN

9 Y3-J10 SAME AS J 2 1 PIN

10 Y3-J11 SAME AS J 2 1 PIN

11 Y3-J12 SAME AS J 2 1 PIN

12 Y3-J13 SAME AS J 2 1 PIN

13 Y3-J14 SAME AS J 2 1 PIN

14 Y3-J15 SAME AS J 2 1 PIN

15 Y3-J16 SAME AS J 2 1 PIN

16 Y3-J17 SAME AS J 2 1 PIN

17 Y3-J18 SAME AS J 2 1 PIN

18 Y3-J19 SAME AS J 2 1 PIN

19 Y3-J20 SAM E AS J 2 1 PIN

20 Y3-J21 SAME AS J 2 1 PIN

21 Y3-J22 SAME AS J 2 1 PIN

22 Y3-J23 SAME AS J 2 1 PIN

23 Y3-J24 SAME AS J 2 1 PIN

24 Y3-J25 SAME AS J 2 1 PIN

25 Y3-J26 SAME AS J 2 1 PIN

26 Y3-J27 SAME AS J 2 1 PIN

27 Y3-J28 SAME AS J 2 1 PIN

28 Y3-J29 SAME AS J 2 1 PIN

29 Y3-J 30 SAM E AS J 2 1 PIN

30 Y3-J31 SAME AS J 2 1 PIN

31 Y3-J32 SAME AS J 2 1 PIN

32 Y3-J33 SAME AS J 2 1 PIN

33 Y3-J34 SAME AS J 2 1 PIN

34 Y3-J35 SAME AS J 2 1 PIN

35 Y3-J36 SAME AS J2 1 PIN

36 Y3-J37 SAME AS J 2 1 PIN

37 Y3-J 38 SAME AS J 2 1 PIN

38 Y3-J39 SAME AS J 2 1 PIN

39 Y3-J40 SAME AS J 2 1 PIN

CATEGORY NO. 10 HARDWARE J

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER j

1 Y3-B1 1 PC BRD ANALG MLTPX CKT NBS PC-300
Dl 5

|; D.D. 1 DEC 77 PARTS LIST- ANALOG MULTIPLEXER CARD (Y300)

jYTEGORY NO. 11 RELAYS

I DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Y3-K1 12 RELAY ELECTRICAL DPST 5 VOLT COTO CR- 320 2- 5-7 0

1

! 2 Y3-K2 SAME AS K

1

3 Y3-K3 SAME AS K

1

4 Y3-K4 SAME AS K

1

5 Y3-K5 SAME AS Kl

6 Y3-K6 SAME AS Kl

7 Y3-K7 SAME AS Kl

8 Y3-K8 SAME AS Kl

|9 Y3-K9 SAME AS Kl

^0 Y3-K10 SAME AS Kl

u Y3-K11 SAME AS Kl

L2 Y3-K12 SAME AS Kl

VTEGORY NO. 12 SUEASS EMBLI ES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 Y3 1 ANALOG MULT IPLXER CARD NBS Y300

i

111
6.8 WIRING LIST

MUX/DVM FRONT PANEL

FUNCTION CONNECTED TO

+ 5V 5V PWR SUPPLY

MUX D ”8” LED ZIOO-5

MUX C "4" LED Z 100-7

MUX B "2" LED Z 100-9

MUX A "1" LED Z1 00-11

+ 5V 5V PWR SUPPLY

DVM FUNCTION D "8" LED Z100-1

5

DVM FUNCTION C "4" LED zioo-13

DVM FUNCTION B "2" LED Z1 00-1

7

DVM FUNCTION A "I" LED Z100-19

+ 5V 5V PWR SUPPLY

DVM RANGE D "8" LED Z1 00-21

DVM RANGE C "4” LED Z 100-27

DVM RANGE B "2" LED Z1 00-25

DVM RANGE A "1" LED Z 100-23

112
WIRING LIST

J-100

INPUT CHANNEL LED I INPUT CHANNEL LED C INPUT CHANNEL LED E INPUT CHANNEL LED A

FUNCTION LED C

FUNCTION LED D

FUNCTION LED B

FUNCTION LED A

RANGE LED D

RANGE LED A

RANGE LED B

RANGE LED C

J353 -4

J353 -3

J353 -1

J353 -2

J353 -12

J353 -5

J353 -6

J353 -8

J353 -13

J351 -23

J352 -25

J351 -22

+ 5V

GND

1 2

3 4

5 6 Y200 -29

7 8 Y200 -31

9 10 Y200 -33

1

1

12 Y200 -35

13 14 J351 -48

15 16

17 18 J351 -50

V9 20 J351 -49

21 22 J351 -45

23 24 J351 -42

25 26 J351 -43

27 28 J351 -44

29 30

31 32

33 34

35 36 J352 -44

37 38 J352 -28

39 40 J351 -45

41 42 J352 -27

43 44 J351 -24

45 46

47 48

49 50

53 54

55 56

57 58 +5V

59 60 GND

113
WIRING LIST

J-200

GND 1 2 GND

J351 -9 3 4

J351 -10 5 6

J351 -11 7 8

J351 -12 9 10

J351 -13 11 12

J351 -14 13 14

J351 -15 15 16

J351 -16 17 18

J351 -17 19 20

J351 -18 21 22

J351 -19 23 24

J351 -20 25 26

J352 -48 27 28

Y100 -6 29 30

Y100 -8 31 32

Y100 -10 33 34

Y100 -12 35 36

Y300 -7HI 37 38

Y300 -5HI 39 40

41 42

Y300 9L0 43 44

45 46

Y300 -10L0 47 48

49 50

ANALOG GND 51 52 ANALOG G

-15V 53 54 -15V

+ 15V 55 56 + 15V

+5V 57 58 +5V . ANALOG GND 59 60 ANALOG G

114
WIRING LIST

PIN NO. Y-300 SIGNAL

0 HI Y300 -0 GRD

Y300 -0 LO DVM ZERO

0 LO Y300 -0 HI

1 HI J356 -B TEMP

1 LO J356 -C

2 HI J356 -D DEW POINT

; 2 LO J356 -E

3 HI J355 -B + 20V

3 LO J353 -A

4 HI J355 -C + 12V

4 LO Y300 -3 LO

5 HI Y200 -39 DAC

5 LO Y200 -51/52

6 HI J335 -E XTAL DET.

6 LO J355 -D

7 HI Y200 -39 DAC REF

7 LO Y200 -31/52

8 HI J354 -E FWR METER

8 LO Y200 -51/52 ANLG GND

9 HI Y300 -8 HI SET DAC

9 LO Y200 -43

10 HI Y300 -9 HI V PWR

10 LO Y200 -47

1

1

HI J357 -B AUXILIARY

1

1

LO J357 -C

HIGH

LOW

GAURD

DVM J204-7

DVM J204-3

DVM J204-2.

DVM HI

DVM LO

DVM GAURD

J1-1 Y100 -J2/1

J1-7 Y100 -J2/7

Jl-8 Y100 -J2/8

Jl-9 Y100 -J2/9

J1-10 Y100 -J2/1

0

J1-11 Y100 -J2/11

J1-14 Y100 -J2/14

MUX RESET

GND

DATA A

DATA B

DATA C

DATA D

+ 5V
WIRING

LT

ST
117

J
WIRING LIST

J353 J354

1 Y1 00-35 A

2 Y1 00-37 B

3 Y1 00-33 C

4 Y1 00-31 D Y200-51/52

5 Y 100-41 E Y300-8HI

6 Y1 00-43

7 GND J355

8 A Y300-3LO

9 . B Y300-3HI

10 C Y300-4HI

1

1

D Y300-6L0( SHIELD)

12 Y1 00-39 E Y300-6HI

13 Y1 00-47

14 J356

A GND

B Y300-1HI

C Y300-1L0

D Y300-2HI

E Y300-2L0

J357

A GND

B Y300-11HI

C Y300-1 1L0

D

E

118
fi ^eure20. Y100 Schematic Circuits 119

| -O-.NCUTU,. |.S. NATIONAL BUREAU Of STANDARDS

ASST, DVWC0WTROL MUX BoAft.0

'OX EARTH TERMUslAU MEASUREMENT STSFEW

-oo.c jr •CAL.

py» *'/+

" „

*" “ MINIMUM .......

1

1 276^0-i\DO

Figure 21 Y100 PC Assembly Drawings 121



R8 R9 Y_\J

ic-r4-^ Rll RI2 fCn RI3

.025% .025% .025% .025% D .025% op "5 =

RI6 20H JJa

RI7

- © ©-

(!) IT

*Q Q Q Q Q Q Q Q

10^7 7

| 7442 S ® 6 6 (i 6 <J ©Ia

T0 Q Q Q Q Q Q^

I 1C -5 V

1 74! 21 S e© C> 6 © © © ©i«

CIRCUIT SI0E

I "

COMPONENT SIDE

NATIONAL RUREAU Of STANDARDS

A55Yj BRIDGE REF BOARD

' EARTH TERMINAL

-OO.L TYP« •C*L«

mtr D-l.,„

my me. P.IMT

T |HU.D

1 1 ZIG^BO -Y200

Figure 23. Y200 PC Assembly Drawing. 125



-Figure 25. Y300 PC Assembly Drawing 129

7. POWER DETECTOR INSTRUMENT MANUAL

7 .

Description: (Figure 26)

The rf detector is a commercial thermister type rf detector mount surrounded

by insulation foam. This mount has a dc isolation block on the input and a stainless steel coaxial feed line for thermal isolation. The NBS Type IV power

meter is connected to the rf detector in a four wire measurement configuration to

eliminate lead resistance errors. The power meter self-balances the thermister

detector to 200 A. The dc output from the Type IV power meter is connected to

the digital voltmeter via input channel #8.

The normal measuring sequence is: (1) Switch rf off in ETMS control/rf unit

(2) Measure and record zero rf power meter voltage on DVM channel #8; (3) Switch

DVM input to channel #9 to enable DAC. Read difference between power meter and coarse reference voltage and automatically set DAC to difference voltage; (4)

Switch to DVM channel //10 and read and record offset voltage residual; (5) Switch

on rf power and read and record voltage change AV on DVM channel #10; (6) Switch

rf off and recheck offset voltage residual for any reference voltage drift or power meter "zero" drift; and (7) Calculate rf power as described elsewhere.

7 .

Specifications

RF thermister mount : Specification frequency from 1 MHz to 1000 MHz at 0 to

10 milliwatts power. (See manufacturer's instruction manual for details.)

Power meter : The NBS Type IV power meter is a self-balancing dc measurement

of rf power by dc substitution. The accuracy of the power measurement is

determined by the accuracy and resolution of the auxiliary voltmeter used

to measure the bridge voltage.

7. 3 RF Power Detector Mount

Refer to the manufacturer's instruction manual included with the system for

information on this unit.

7.4 NBS Type IV Power Meter

Refer to the NBS Type IV power meter instrument manual included with the

system.

131
I

132

Figure

26.

Power

Detector

Unit.
Figar

7 . 5 PARTS LIST - POWER PETEH TOR

Ld.d. 9 FEE 78 PARTS LIST- POKER DETECTOR UNIT (U) DATA 18

I

ILate gory no. •CONNECTORS

DSGN

1 U-Jl

l 2 U-J 2

•g

j 3 U-J3

QTY DESCRIPTION VALUE MFG PART NUMBER

2 JACK TYPE N TO .141 COAX OSM . OSN 402-1

SAME AS J1 COAX

1 CONNECTOR THERM,. MOUNT 6 PIN HP 1251-0152

u

ou

U

II a

«Q

U

»

3

0b

fATE GORY NO

DSGN

10

QTY

HARDWARE

DESCRIPTION VALUE MFG PART NUMBER

1 U-Hl

, 2 U-H2

i 3 U-H3

1 INSTRUMENT CASE

1 FACE PANEL FOR HI

1 REAR PANEL FOR HI

BUD BB-1801-RB

.09375 AL NBS

.09375 AL NBS

ATE GORY NO. 12 SUBASSE FELIES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 U-Ml 1 NBS TYPE IV POKR METER NBS TYPE IV

2 U-Tl 1 THERMISTOR MOUNT HP 4 78A- H55

3 U-Nl 1 NOISE SUPPRESS/DC BLK KEIN 9 3 6N

CATEGORY NO. 13 — MISCELLANEOUS" ' DSGN QTY DESCRIPTION VALUE MFG PART NUMEER

1 U-Kl 1 COAX MIN SEMI-RIGID SS 4 UT UT/.141SS

133
7.6 WIPING LIST

F-101 REMOTE

1

2

3

4

5

6

7

8

F.VR METER OUT

PWR METER OUT

(-) J354-E

(4) J354-D

1

2

3

4

5

6

7

8

P-102 BOLOM.

J478A-H55-4 (E-)

J478A-H55-4 (I-)

J478A-H55-1 (I+ )

J478A-H55-1 (E+)

134
8. CLOCK AND TEMPERATURE/DEW POINT INSTRUCTION MANUAL

(FIGURE 27)

8 .

1

Introduction

This unit contains a commercial digital clock having a crystal-oscillator

time base, four thumb-wheel switches which are used to enter date (month/day)

information into the calculator, and temperature and dew point meters which are connected by long cables with remote probes to monitor outside conditions.

These probes are enclosed in an environmental enclosure to shield them from the

direct effects of the sun and breezes. The enclosure case can be extended in

normal operation, but should be left closed if windy conditions exist.

The dc outputs of the temperature and dew point meters are connected to the

DVM via input channels 1 and 2, respectively.

8 . 2 Specifications

Time : The clock is a commercially manufactured model with a crystal time base.

It has a power-outage clock-failure signal that is used to initiate a program

warning message. (See manufacturer’s instruction manual.)

Date : The manual thumb-wheel switches on the front panel are used to input

month and date information to calculator.

Temperature monitor : The temperature monitor is a thermister sensor type meter

with a range of 0 to 100°F. Extended ranging is available on the DVM reading only.

Dew point monitor : The dew point monitor is a heated lithuim-cloride element

containing a thermister sensor type meter with a range of 12° to 96°F. (See

manufacturer’s instruction manual.)

Thirty-meter (100-ft.) extension cables are supplied to remotely locate the

temperature and dew point sensors to monitor outside conditions.

8 . 3 Digital Clock

The commercial digital clock provides parallel BCD data to the calculator

on I/O select code // 3. These data are combined with the BCD data for month and

day from the thumb-wheel switches. When the calculator requests time from the

clock, the clock is "locked" to prevent updating while the data are transferred.

If a one-second "tick" occurs during this time, it is stored in the clock input

circuit until data transfer is completed. Then the time is updated.

Refer to the manufacturer’s instruction manual for information on this unit.

135
136

Figure

27.

Clock

and

Temperature

/Dew-Point

Unit.
8.4 X3 Clock Inhibit/Flag Card (Schematic, Figure 28)

This printed circuit card preforms the control interfacing between the

clock and calculator. It also has pull-up resistors used in the thumb-wheel

switch data lines.

|l When the CTL pulse from the calculator requests clock data, it triggers the

one-shot, IC-1. This one-shot pulse inhibits clock updating on pin 33 of J3 and

returns a ready-flag to the calculator on pin 34 of J3.

The calculator can take as long as 55 milliseconds to read in the data;

therefore, this hold pulse is approximately 70 ms in duration.

I The maximum repetitive rate that time can be read into the calculator is 10

to 12 times per second.

8.4.1 Troubleshooting

Check that the interface cable is properly connected. Verify that a control

pulse CTL is arriving at the one-shot and that the return flag pulse and the

inhibit pulse are being generated. Use the Enter (3,*)Q1,Q command to interrogate the clock date/time.

8 . 5 XI Temperature and Dew-Point Sensors (Schematic, Figure 30)

This printed circuit card is the temperature bridge and amplifier and the

dew-point bridge and amplifier circuits.

The two circuits are identical with the exception of the resistance values

in the bridge and the composite resistors R1 and R31.

The remote thermister probes form one leg of the bridge. The thermister

elements of the temperature and dew-point probes are identical; however, the dewpoint probe is surrounded by a spool of wicking soaked in lithium chloride

(LiCl) solution. The LiCl absorbs moisture from the atmosphere, decreasing its

electrical resistance. An ac current passing through the LiCl heats it up,

drying the spool until equilibrium is reached. The thermister element measures

the elevated temperature of the probe. Dew-point temperature is indicated as a

function of this temperature.

The temperature probe has a metal guard frame around it but senses the

atmospheric temperature. The output of the bridge circuit is connected to a

I 137
I

differential input instrument amplifier circuit having a gain of 10 formed by

three of the amplifiers in IC-1 (or IC-2 in the dew-point circuit). The output

buffer amplifier offsets the signal to establish the "zero degree" point on the

temperature scale.

The output of the amplifiers are connected to the DVM and also to front

panel digital meters. The front panel meter scales can be changed to read above

99° by switching DIP switches SI and S2 (or S3 and S4) off. The front panel

meters do not read below zero degrees nor above 99.9; however, the DVM temperature data are correct outside this range.

8.5.1 Alignment of Temperature Sensor (Refer to Figures 30 and 31)

Procedure

:

(1)

Disconnect the temperature probe and place XI card on pc extension.

Note: The adjustment of R40 is not critical and is set to approximately

midrange.

(2) Short TP-6 and TP-7 together and connect TP-6 to ground (TP-5) . Monitor TPwith a voltmeter and adjust R52, for a zero reading on the voltmeter. Keeping

the shorting jumper between TP-6 and TP-7, remove the ground TP-6 connection.

Adjust common mode rejection, R48, for a zero reading on the voltmeter.

Remove shorting jumper between TP-6 and TP-7.

(3) Connect a high Z dc voltmeter to test points TP-6 and TP-7.

(4) Connect an 8085-ft resistor between pins 2 and 3 of the rear panel temperature jack. Adjust bridge balance, R33, for a zero reading on the voltmeter.

(5) Change the input resistor on pins 2 and 3 to 39,965 ft and adjust range, R36

to obtain 108 millivolts reading on the voltmeter.

(6) Move the voltmeter to TP-8 and ground and adjust the gain trimmer R41 for a voltmeter reading of 1.08 volts.

(7) Change the input resistor to 12,248 ft. Connect the voltmeter to TP-9 and

adjust the offset, R52, to obtain a voltmeter reading of +770 millivolts.

138
The output voltage will be in degrees fahrenheit and will be scaled to 10

millivolts per degree.

8.5.2 Alignment of Dew-Point Sensor

Procedure:

(1) Disconnect the dew-point probe and place X—1 cord on the pc extension.

Note: The adjustment of RIO is not critical and is set to approximately

midrange.

(2) Short TP-1 and TP-2 together and connect TP-1 to ground (TP-5) . Monitor

test point 4 with a voltmeter and adjust R22 for a zero reading on the voltmeter.

Keeping the shorting jumper between TP-1 and TP-2, remove the ground from TP-1.

Adjust the common mode rejection potentiometer, R18, for a zero reading on

the voltmeter. Remove shorting jumper between TP-1 and TP-2.

(3) Connect a high Z dc voltmeter between TP-1 and TP-2.

(4) Connect a 1715-ft resistor between pins 2 and 3 of the dew-point jack on the

rear panel. Adjust bridge balance control, R3, for zero volts on the voltmeter.

(5) Change the input resistor on pins 2 and 3 to 10566 0, and adjust Range R6

for 108 millivolts on the voltmeter.

(6) Move the voltmeter to TP-3 and adjust the gain trimmer Rll for a voltmeter

reading of 1.08 volts.

(7) Change the input resistor to 8898 fl. Connect the voltmeter to TP-4 and

adjust offset adj .

,

R22 for a voltmeter reading of +180 millivolts.

The output voltage is scaled 10 millivolts per degree on dew-point temperature.

8.5.3 Troubleshooting

Note: Refer to the caution warning on the manufacturer's data sheets for

the dew-point probe.

139
The dew-point sensor will cycle several times and can require an hour

before stabilizing.

Check that all cables are properly connected and that the temperature and

dew-point probes are not interchanged.

If the temperature and dew-point readings seem to vary randomly, ascertain

that the remote probes are not located close to the exhaust fans of air condition

equipment or other heat sources.

8 . 6 X2 Temperature/Dew-Point Power Supply (Schematic, Figure 32)

I

This card furnishes regulated 6.5 volts and 5.0 volts for the temperature/

dew-point sensors and digital panel meters respectively.

8. 7 AC Power Distribution (Schematic, Figure 34)

All power supplies are the divided primary type and are switched between

115 and 230 volts by changing the pc card switch in the fuse module on the rear

'

panel

.

X

i X

5 X

X
8 . 8 PARTS LIST-CLOCK/TEMPERATURE/DEW-POINT

D.D. 1 DEC 77 PARTS LIST- TEMP/LEW PT. /CLOCK CHASSIS (X) DATA 4

i

1

TEGORY NO. 1 —

DSGN

1 QTY DESCRIPTION VALUE MFG PART NUMEER

1' X2-R3

i 1 RES FXD WW 5% 12W 125 OHM

9t?rr^Dv Kin c. 1 Lj VaU i\ X lh\J 9 o

“ "" ” " ” " 1 “ ' UUiSl hi j_j lUKkj ~

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

|1 X-Jl 1 CONN PC EDGE (XI CARD) 60 PIN AMPH 261-10030-2

2 X-J2 1 CONN PC EDGE (X2 CARD) 60 PIN AMPH 261-10030-2

3 X-J 3 1 CONN PC EDGE ( X3 CARD) 60 PIN AM PH 261-10030-2

4 X-J4 1 CONN JACK (TEMP PROBE) 4 FIN SWCT C4F

5 X-J 5 1 CONN JACK (D.P. PROBE) 4 PIN SWCT C4F

6 X-J 6 1 CONN JACK (ANALOG) 5 PIN VI KG VP.5/4AB13

7 X-J 7 1 CONN JACK TOP (CLOCK) 30 PIN SAE SAC 15 D/1-

2

8 X-J 8 1 CONN JK BOTTOM (CLOCK) 4 4 PIN SAE SAC 22D/1-2

9 X-J 9 1 CONN JACK (TEMP DPM) 2 0 PIN VIKG 2 VH 10/1AN5

.0 X-J10 1 CONN JACK (D.P. DPM) 20 PIN V IKG 2VH 10/1AN-5

.1 X-J 11 1 CONN BLUE RIBBON I/O 5 0 PIN AMPH 57-40500

TEGORY NO. mrDMTMAT C7

-

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 X-T'l

I

i

!

1 MINIATURE TERM BLOCK 14 PIN CNCH 14-140

Ltegory no. 8 —

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

|'l X-Sl 1 THUMB WHEEL SWITCH 4 DECADE UNMX SF-22A

2 X-S2 1 SWITCH AC POWER SPST ALCO MSTL-206N

141
L D . D . CATEGORY

1 DEC

NO. < 77 PARTS LIST- TEMP/DEW PT. /CLOCK CHASSIS (X)

METERS ' DATA

DSGN QTY DESCRIPTION

X-Ml

X-M2

DIG PANL MTR (D.P.)

DIG PANL MTR (TEMP)

VALUE MFG PART NUMBER

3 DIGIT NLS PM3 39-250-

3 DIGIT NLS PM 3 39-250-

CATEGORY NO. 10- HARDWARE

DSGN QTY DESCRIPTION VALUE MFG

1 X-Hl 1 INSTRUMENT CASE BUD

2 X-H2 1 FACE PANEL FOR Hi .09375 AL NBS

3 X-H3 1 SHELF BRACKET .06250 AL NBS

4 X-H4 1 L-BRACKET (PR SUPPLY) . 09375 AL NBS

5 X-H5 1 SUPPORT BRKT (CLOCK) .06250 AL NBS

6 X-H 6 2 SUPPORT BRKT (DPM'S) .06250 AL NBS

7 X-H 7 4 SHELF POSTS NBS

8 X-H 8 1 PC CARD CAGE 4 CARD SCBE

9 X-H 9 1 RESISTOR CLIP

PART NUMBER

H

9 1/2X7 1/2;

1.7 5W X2.5I1 XI!

2 3/4H

iTEG

i 3

5 l

J )

I X

It i i

i

j CATEGORY NO, 12- SUBASS EMBL I ESJ

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

I l

3 X

J X 1

2

3

4

5

6

7

X-Ml

X-M2

X-PR1

X-PR2

X-Xl

X-X2

X-X3

1

1

1

1

1

1

1

DIGITAL PANEL CLOCK

MODULAR POWER SUPPLY

TEMPERATURE PROBE

DEW POINT PROBE

TEMP/DEW PT. PC CARD

POWER SUPPLY PC CARD

CLOCK INHIBIT PC CARD

24 HR

H—15V.

NEPT

EB

YSI

YSI

NBS

NBS

NBS

670 OS (+OPTIOF

527

7 05

9101

XI

XI

X3

J X

CATEGORY NO. 13- MISCELLANEOUS

DSGN QTY DESCRIPTION VALUE ME'G PART NUMBER

1 X-Ll 1 LAMP CURRENT LIMIT 12 V GE #55

2 X--A1 1 SOCKET FOR Ll LCFT 07-20

3 X-A2 ,JL LENSE FOR Ll CHGM 6063-000-634

4 X-Pl 1 F US E/F I LTER/AC SOCKET CROM 604

5 X-Tl 1 TRANS FORI* ER DUAL PRIM 115/2 20 V YSI B-09125

5 X

142
D. D 1 DEC 77 PARTS LIST- TEMP/DEW POINT PC CARD (XI) DATA 1

.TEGORY NO. 1 RESISTORS

DSGN QTY DESCRIPTION

1 XI- R1 1 RES FXD MF 1% 1/ 4ft 2 X1-R2 1 RES FXD MF 1% 1/4ft 3 X1-R3 1 RES VAR TRIM CERMET

4 X1-R4 2 RES FXD MF 1% 1/ 4ft 5 X1-R5 SAME AS R4

6 X1-R6 6 RES VAR TRIM CERMET

7 XI- R7 1 RES FXD MF 1% 1/ 4ft 8 X1-R8 2 RES FXD MF 1% 1/ 4ft

I 9' X1-R9 2 RES FXD MF 1% 1/ 4 ft 10 XI- RIO 3 RES VAR TRIM CERMET

1 Xl-Rll SAME AS R6

12 X1-R12 2 RES FXD MF 1% 1/4ft .3 X1-R13 4 RES FXD MF 1% 1/ 4ft

14 X1-R14 SAME AS R13

.5 X1-R15 12 RES FXD MF 1% 1/ 4ft

.6 X1-R16 SAME AS R15

17 X1-R17 2 RES FXD MF 1% 1/ 4ft

[8 X1-R18 2 RES VAR TRIM CERMET

r s X1-R19 SAME AS R15

0 X1-R20 SAME AS R15

1 X1-R21 SAME AS R15

2 X1-R22 SAME AS R6

3 X1-R23 SAM E AS R15

4 X1-R24 2 RES FXD MF 1% l/4ft

5 X1-R25 2 RES FXD MF 1% 1/ 4ft

6 X1-R31 1 RES FXD MF 1% 1/ 4ft 7 X1-R3 2 1 RES FXD MF 1% 1/ 4ft 8 X1-R3 3 SAME AS RIO

S X1-R34 2 RES FXD MF 1% 1/4 ft 0 X1-R35 SAME AS R34

1 X1-R36 SAME AS R6

2 X1-R37 1 RES FXD MF 1% 1/ 4ft

•'3 X1-R38 SAME AS R8

(4 X1-R39 SAME AS R9

5 X1-R40 SAME AS RIO

6 X1-R41 SAME AS R6

7 X1-R42 SAME AS R12

8 X1-R43 SAME AS R13

9 X1-R44 SAME AS R13

0 X1-R45 SAME AS R15

.1 X1-R46 SAME AS R15

t2 X1-R4 7 SAME AS R17

VALUE MFG PART NUMBER

6 . 6 5K OHM CORG NC5

1.6 2K OHM CORG NC5

500 OHM BRNS 3006W-1-501

3. 48K OHM CORG NC5

3.48K OHM

5. 0 0K OHM BRNS 30 06ft-l-50 2

24 . 9K OHM CORG NC 5

100 OHM CORG NC5

2 . 00K OHM CORG NC5

1 . 0 OK OHM BRNS 30 06W-1-10 2

5 . 00K OHM

7 . 5 OK OHM CORG NC5

39. 2K OHM CORG NC 5

39. 2K OHM

100 K oiim CORG NC5

100 K OHM

90. 9K OHM CORG NC5

20. OK OHM BRNS 30 06ft-l- 20 3

100 K OHM

100 K OHM

10 0 K OHM

5. 00K OHM

100 K OHM

20 . OK OHM CORG NC5

2. 21K OHM CORG NC5

14. 7K OHM CORG NC5

7 . 6 8 K OHM CORG NC5

1. 00K OHM

6 . 98K OHM CORG NC 5

6. 98K OHM

5. 0 0K OHM

21. OK OHM CORG NC5

100 OHM

2. 0 0K OHM

1 . 0 OK OHM

5. 00K OHM

7 . 5 OK OHM

39. 2

K

OHM

39. 2K OHM

100 K OHM

100 K OHM

90. 9K OHM
L. D. D. 1 DEC 77 PARTS LIST- TEMP/DEW POINT PC

43 X1-R48 SAME AS Rl 8 20 . OK OHM

44 X1-R49 SAME AS Rl 5 100 K OHM

45 X1-R50 SAME AS Rl 5 100 K OHM

46 X1-R51 SAME AS Rl 5 100 K OHM

47 X1-R52 SAME AS R6 5.0 OK OHM

48 X1-R53 SAME AS Rl 5 100 K OHM

45 X1-R54 SAME AS R24 20. OK OHM

50 X1-R55 SAME AS R25 2. 2 IK OHM

CARD (XI) DATA 1

i'E

CATEGORY NO. -CAPACITORSDSGN QTY DESCRIPTION VALUE MFG

1 Xl-Cl 2 CAP HI -K MONO 50V 1.0 UF SPRG

2 X1-C2 SAME AS Cl 1.0 UF

3 X1-C3 4 CAP CERAMIC 0.1 UF SPRG

4 X1-C4 SAME AS C3 0.1 UF

5 X1-C5 SAME AS C3 0.1 UF

6 X1-C6 SAME AS C3 0.1 UF

7 X1-C7 3 CAP TANT 25V 10 UF

8 X1-C8 2 CAP ELECTLYC 50V 50 UF SPRG

9 X1-C9 NOT USED

10 X1-C10 SAME AS C7 10 UF

11 C11-C37 NOT USED

12 X1-C38 SAME AS C8 50 UF

13 X1-C40 SAME AS C7 10 UF

PART NUMBER

;e(

r peg CATEGORY NO.

DSGN

5-

QTY

INTEGRATED CIRCUITSDESCRIPTION VALUE MFG PART NUMBER

1 X1-IC1

2 XI-IC2

I.C. QUAD OP AMP

SAME AS I Cl

A , B , C , &D

E ,F ,G , &H

NATL LM 3 24

CATEGORY NO. TERRI NALSDSGN QTY DESCRIPTION

1 Xl-Tl 9 TEST POINT JACK

2 X1-T2 SAME AS Tl

3 X 1-T3 SAME AS Tl

4 X1-T4 SAME AS Tl

VALUE MFG PART NUMBER

144
. . D . 1 DEC 77 PARTS LIST- TEMP/DEW POINT PC CARD (XI) DATA 1

5 X1-T5 SAME AS Tl

> X1-T6 SAME AS Tl

f X1-T7 SAME AS Tl

i X1-T8 SAME AS Tl

9 X1-T9

!

I

SAME AS Tl

i [.GORY NO . 8 —SWITCHES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

I Xl-Sl 1 SW SPST 8 ROCKER DIP ROCKER 1 GRAY 76B08

2 X1-S2 SECTION OF SI ROCKER 2

8 X1-S3 SECTION OF SI ROCKER 3

1 X1-S4 SECTION OF SI ROCKER 4

^REGORY NO. 10- -HARDWARE

Ill DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

L Xl-Bl 1 PC BRD FOR T/D.P. CRKT NBS PC-1

IITEGORY NO

DSGN

IL XI

12 SUBASS EMBLI ES

QTY DESCRIPTION VALUE

1 TEMP/DEW PT. PC CARD

MFG PART NUMBER

NBS XI

145
L.D.D. 1 DEC 77 PARTS LIST- TEMP/DEW PT. PWR SUPPLY (X2) DATA 2

(

CATEGORY NO. 1 RESISTORS

DSGN QTY DESCRIPTION VALUE MFG PART

1 X2-R1 1 RES FXD MF 1% 1/4W 26 7 OHM CORN NC 5

2 X2-R2 1 RES FXD MF 1% 1/4W 1.10K OHM CORN NC5

3 X2-R3 1 CHASSIS MOUNTED 125 OHM

4 X2-R4 1 RES FXD CARS 5% 1/4W 2. 70K OHM AB CB

CATEGORY NO. 2 - CAPACITORSDSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 X2-C1 1 CAP ELECTLYC 50V 500 UF CD VJBR 50 0-50

2 X 2 -C 2 1 CAP HI —K MONO 50V 1 UF SPRG 5C0 23105X0 250

3 X2-C3 2 CAP CERAMIC . 1 UF SPRG

4 X2-C4 1 CAP ELECTLYC 50V 50 UF SPRG 30 D TE-1307

5 X2-C5 SAME AS C3 . 1 UF

CATEGORY NO

DSGN

1 X2-CR1

4 DIODES

QTY DESCRIPTION VALUE MFG PART NUMBER

1 DIODE SILICON 1A 4QCV 1 AMP RCA 1N4004

CATEGORY NO. 5 INTEGRATED

DSGN QTY DESCRIPTION

1 X2-IC1 1 V OLTACE R EG U LATOR

2 X 2 - 1 C 2 1 VOLTAGE REGULATOR

CIRCUITS

VALUE MFG

6.5V NATL

5.0V MOT

PART NUMBER

LM 317T

MC7805CP

146
b.D. 1 DEC 77 PARTS LIST- TEMP /DEW PT . PWR SUPPLY ( X 2 DATA 2

)

?EGORY NO. 10- HARDWARE

. DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

X2-B1 1 PC BRD- PWR SPLY CRKT

X2-H1 2 SCREW 4-40

X2-H2 2 NUT 4-40

X2-H3 2 WASHER FLAT 4-40

NBS PC-2

1/4

FEGORY NO. 12-

DSGN QTY — SUBASSEMBLIES

DESCRIPTION VALUE MFG PART NUM3ER

X2 1 POWER SUPPLY PC CARD NBS X2

147
L.D.D 1 DEC 7 7 CLOCK FLAG/INHIBIT PC CARD (X3) DATA 3

CATEGORY NO. 1 RESISTORS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 X3-R1 17 RES FXD CARB 5% 1/4W 1. OK OHM AB CB

2 X3-R2 SAME AS Rl 1. OK OHM

3 X3-R3 DELETED 1. OK OHM

4 X3-R4 1 RES FXD CARB 5% 1/4W 510 OHM AB CB

5 X3-R5 1 RES FXD CARB 5% 1/4W 10 K OHM AB CB

6 X3-R6 SAME AS Rl 1. OK OHM

7 X3-R7 SAME AS Rl 1. OK OHM

8 X3-R8 SAME AS Rl 1. OK OHM I 9 X3-R9 SAME AS Rl 1. OK OHM

10 X3-R10 SAME AS Rl 1. OK OHM

11 X3-R11 SAME AS Rl 1. OK OHM

12 X3-R12 SAME AS Rl 1. OK OHM | 13 X 3 - R 1

3

SAME AS Rl 1. OK OHM

14 X3-R14 SAME AS Rl 1. OK OHM

15 X3-R15 SAME AS Rl 1 . OK OHM

16 X3-R16 SAME AS Rl 1. OK OHM

17 X3-R17 SAME AS Rl 1. OK OHM

18 X3-R18 SAME AS Rl 1. OK OHM

19 X3-R19 SAME AS Rl 1. OK OHM
1 DEC 77 CLOCK FLAG/INI1 1BIT PC CARD ( X 3

)

DATA 3

i

|d.d.

I

IVTEGORY NO.

DSGN

1 X3-B1

^TEGORY NO

1 DSGN

1 X3

10 HARDWARE

QTY DESCRIPTION VALUE KFG FART NUMBER

1 PC BRD- CLK IHBT CRKT NBS PC-3

12 SUBASSEMBLIES

QTY DESCRIPTION VALUE MFG PART NUMBER

1 CLK INHIBIT PC CARD NBS X3
8.-9 CLOCK WIRING LIST

J-2

GND X3-60

J11-15

J11-18

J 1 1—19

J1 1-23

J11-26

J1 1-2?

J 1

1 -30

J11-31

J 1 1 -34

J11-35

J 1 1 -38

J11-39

1

2

3

4

5

6

7

8

9

10

11

12

13

14

13

16

17

18

19

20

21

22

GND X3-60

X3-34 (DSBL)

J11-17

J11-16

J 1 1 -21

J1 1-20

J 1 1 -25

J11-24

j 1 1 -29

J 1 1 -28

J 1

1 -33

J11-32

J 1

1 -37

J1 1-36

150
WIRING LIST

J-X1

J456 -C

GND J/f -3

GND J5 -3

1 2 X2 -59 GND

J456 - D 3 4 COm 1 5VPS/=5VPS

+ 6.5V X2 -55 5 6

7 8

9 10

J4-2 11 12

J4-1 13 14

15 16

J5-2 17 18

J5-1 19 20

21 22

23 24

25 26

27 28

-15 VPS 29 30

31 32

+15 VPS 33 34

35 38

39 40

41 42 D.P. DPM-1

D.P. + Jif56 -D 43 44

45 46 D.P. DPM-B

TEMP + J456 -B 47 48 TEMP DPM-1

49 50

TEMP DPM-H 51 52 TEMP DPM-B

D.P. DPM-H 53 54

55 56

57 58

59 60

151
WIRING LIST

J-X2

",

2

3 4

5 6

7 8

9 10

1

1

12

2/fV AC

TO #55 LAMP 13 14

J 5-4

TO #55. LAMP 15 16

17 18

TO R3 19 20

21 22

23 24

25 26

27 28

29 30

31 32

33 34

35 36

TEMP DPM-9

D.P. DPM-9 37 38

39 40

41 42

43 44

45 46

47 48

49 50

TO R3 51 52

53 54

XI -5 55 56

24V AC 57 58 TEMP DPM GND

X1-2/GND 59 60 D.P. DPM GND

152
WIRING LIST

J-X3

CLOCK J1-B +5V 1 2 +5V CLOCK J1-B

XI 0 DAY TWS C 3 4 J11-1 C 8

XI 0 DAY TWS B 5 6 «J 11 —2 B8

XI 0 DAY TWS A 7 8 J11-3 A8

XI DAY TWS D 9 10 J11-4 D7

XI DAY TWS C 11 12 J11-5 C7

XI DAY TWS B 13 14 J11-6 B7

XI DAY TWS A 15 16 J11-7 A7

XI 0 MONTH TWS B 17 18 J 1 1 —8 BIO

XI 0 MONTH TWS A 19 20 J11-9 A10

XI MONTH TWS D 21 22 J11-10 D9

XI MONTH TWS C 23 24 J11-11 C9

XI MONTH TWS B 25 26 J

1

1—12 B9

XT MONTH TWS A 27 28 Jll-13 A9

XI 0 DAY TWS D 29 30 J11-14 D8

XI 0 MONTH TVS D 31 32 j 1 1 -43 DIO

FLAG J 1 1 -41 33 34 CLOCK J2-F (DSBL)

CTL J 1 1 -40 35 36

37 tA OO

XI 0 MONTH TWS C 39 40 J 1 1 -44 CIO

41 42

J11-45 43 44 J11-46 "1" BUSS

45 46

47 48

49 50

51 52

53 54

55 56

57 58

TWS-COMMON

J11-49&50 59 60

CLOCK J2-2&D

GND

153
DPM WIRING LIST
-11

CLOCK

o

-4 uo VD Os O y— OJ uo NO OJ O NO -4 CO

«— r— t=> EH r— r— x =5 T— OJ OJ >-• OJ OJ NO NO NO -4 -4 -4- uo

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 » O 1 OJ OJ OJ OJ OJ OJ OJ OJ OJ OJ OJ OJ OJ NO NO NO NO NO NO X NO

*3 *"3 •“D NO NO NO •“0 No No X X X X X X O X

VD CV OO CO 0 OJ NO -4- uo VO CO- 00 CO 0 OJ NO -4 UO VD IV CO CO O

OJ OJ OJ OJ no NO NO NO NO NO NO NO NO NO -4 -4 -4 -4" -4 -4 -4 -4 -4 -4 UO

O OJ -4 VD 00 O OJ -4 VD CO O

Cs

0 r- OJ -4 VD 00 f—' OJ OJ OJ Ol OJ NO V X T— s s CO Ph

I | 1 I I | 1 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 NO NO NO NO NO NO NO NO NO NO NO NO NO NO Ol OJ Ol OJ OJ OJ OJ OJ 01 OJ OJ X X X X X X X X X X X X X X •"C •"O *”3 0 Tmmm OJ NO -4 uo VD tv CO co 0 _ OJ NO -4 uo

01 NO -4 uo VD cv CO ON r* r” r— OJ OJ OJ OJ Ol OJ

I

1

1 155A
.
8 . 10 Drawings

REVISIONS

0 FLAG

Q

^]| A7 BCD OUT

NOMENCLATURE NATIONAL BUREAU OF STANDARDS

WASHINGTON. D. C 20234 SCHEMATIC, CLOCK INHI&lT BOAKD

'OR EARTH ternmnal

MEASUREWENJT S/ST£M

MODEL TYPE SCALE

DIMENSIONS IN INCHES

TOLERANCES

1 CnUm atXrrmu* mh/M 1 DECIMALS ± .009 FRACTIONS ±OI« ANGLES ± H'

CHECKER

PROJECT ENOR PROJECT ENOR

’ Y

DO MOT KAU TMI MMT

WV IK. THIS PRINT ISSUED c„ 1 1 27&6q-SO-X 3

Figure 28. X3 Schematic Circuits. 157

S'l |.B. NATIONAL BUREAU Of STANDARDS

ASST, CLOCK INHIBIT BOARD

"ok eartm tebkiwal

fAEA.<,URE«\£WT 5arsrew\

-COIL TTF« •out °n7^>

~OJ “'

•° -a, .cu, r» ot

p«imtT.u«d TM"

1 1 - X3

Figure 29, X3 PC Assembly Drawing, 159

0.,.TM. ...... .—

,0 e.«•> ii-ii-V

: vTM.:irf;":,t'."”

ii-i6.il

6.5 VDC

+ 15 VDC <£

GND (£

-15 VDC <<

Figure 30. XI Schematic Circuits.

NATIONAi MJRKAU Of STANDARDS

SCHEMATIC, TEMP £ Dtw poiWT S6W$0*

MeAsuRtf'tur srtT

-ootc 3H mCAij

'~*c '

f .,„ - “t

| p.,kt

T7.u«o c.,„

II 1 Z1M80 XI

S’ -O..HCL.TU.. .So NATIONAL BUREAU Of STANDARDS

4SSY, TEMP, t DEW P OIKT SfcWSOR

»0« tAPTl-l TEftMIkJftL M£AS'jfc6MfcK/T SYSTtfA

-OOIL HE. •C*Lt

ld’p

•o men tcut nm mmi

mi^nuiB

1 1 276 6 4 80 -XI

Figure 31. XI PC Assembly Drawing, 163

NOMENCLATURE NATIONAL BUREAU OF STANDARDS

WASHINGTON. D. C. 20234 SCHEMATIC, i/dp power supply

fob E/\RTH TERMINAL

MEASUREMENT 'SYSTEM

MODEL TYPE SCALE

OIMKNSlONS IN INCHES

(UaJaaa oOtamnsa fwn/iHi TOLMUNCB

1 Unimm aiXrrwiaa rpaci/iadl DECIMALS ±008 FRACTIONS ±Oi8 ANGLES

OSAFTSMAN /Y\/w>&CHKCKIA

PdOJKT INQK PROJECT moo

2 1 l1 1 CM 1 CP aMO l N SB A * 1i THIS PRINT ISSUED

• FNfOYlO SY

1 1 276&480-X2.

Figure 32. X2 Schematic Circuits.

165

-!S'| -o«hcu,u« -0 NATIONAL BUREAU Of STANDARDS

WASHINGTON. 0 C 20234 ASSr, T/DP PWR SUPPLY

»ok EARTH TERMINAL

MEASUREMENT S^sreM

-OO.L •"Ll

c "“'"

,n "t- NIINT

>inulO

1 i

Figure 33, X2 PC Assembly Drawing, 167
I

)
FILTER 5

i^ii

v:

c_> o

_joo

DFigure

34.

Clock/Temperature

AC

Power

Distribution.
9. NOISE-ADD STANDARD AND POWER SUPPLY INSTRUCTION MANUAL

9.1

Introduction

The noise-add standard is a stable dual-diode noise generator module which

is mounted at the throat of the antenna to inject a known level of added noise

into the receiver system of the earth terminal under ETMS calculator control.

This noise-add signal is injected during each measurement to provide informatior

needed to correct for receiver system gain changes.

The noise-add module is powered by a constant power supply which is

controlled remotely from the ETMS via two coaxial control cables.

9.

2

Specifications

Dual diode noise-add standard : The 7.0 to 7.4 GHz frequency noise-diode output

level is approximately 3 dB less than diode No. 2.

Noise-add current supply : This external module contains a long-term stability

voltage reference which is used to determine the constant-current to each

noise-add diode.

Input power: 115/230 V 50/60 Hz.

Input control: Two coaxial lines from ETMS control console.

9.

3

Noise-Add Module (Figure 35)

The X-band noise-add module combines the noise outputs of two solid-state

noise diodes. The output of this module is injected at the directional-coupler

immediately ahead of the low-noise amplifier via a short semi-rigid coaxial

cable.

The two noise diodes are remotely switched via the bias power supply from

the ETMS control/rf console. The signals from the diodes are combined through

two, 3 dB hybrid couplers in a manner which reduces the output level of #1

diode to approximately 3 dB below the output level of diode // 2 (see fig. 36).

Each noise add diode is a dual source. If one diode should become defective, the diode substrate can be reversed to utilize the spare diode; however,

all previous calibration history will be lost.

Note: Avoid connecting or disconnecting the bias current supply cables

without first turning the ac power switch "off" on the bias power supply.

170
171

Figure

35.

Noise-Add

Standard

Unit.
9.4 Noise-Add Power Supply (Schematic, Figure 37)

The noise-add power supply furnishes constant current bias to the noise-add

module. The constant current generators [9] for the noise diodes are referenced to a 10 volt standard reference. The circuits in the generator are symetrical to eliminate output variation with temperature change.

The output current is switched (shunted) to ground to turn the noise diode

off.

These switch transistors Q1 and Q2 are controlled from the remote input

lines via optical isolators IC-3 and IC-4. When the input to the optical

coupler is open circuited or at + 15 volts the noise diode is turned on. Conversely, when the input is shorted the noise diode is off.

The resistance values in the current sources were selected to adjust the

outputs of the diodes to approximately 3 dB difference in noise power level at

the combined output of the two, 3 dB hybrid couplers.

9 . 5 Troubleshooting

Note: Ascertain that the par-amp connected to the noise-add unit is

switched to the down-link. Initially verify that each noise-add diode is

working by observing the output of the down-link on a spectrum analyzer and

manually switch noise-add //I and //2 off and on. Determine that noise-add //2 injects a larger noise power. Reverse the control cables at the ETMS control/rf

console if necessary. If the remote cables are suspected, open and short circui

the BNC control inputs to the noise-add power supply observing the results on

the spectrum analyzer.

These noise-add and power supply modules have matching serial numbers and

have been checked on the NBS noise calibration system before being shipped. If

the noise-add module is to be used as a reference standard for continuity of

data over long time spans, it should be rechecked periodically.

172
D.D.

9 . e PART LIST - NOISE ADD UNIT & POWER SUPPLY

1 DEC 77 PARTS LIST- NOISE ADD PWR SUPPLY (V) DATA 12

TEGORY NO. ILLS GN QTY

V8-R23 1

RESISTORS

DESCRIPTION VALUE MFG

RES FXD CARE 5% 1/2 W 910 OHM AB

PART NUMBER

EB

TEGORY NO. 4 DIODESDSGN QTY DESCRIPTION

1 V-Dl 1 LED (INDICATOR LAMP)

VALUE MFG PART NUMBER

HP 5082-4655

TEGORY NO< 'ONNECTORSDSGN QTY DESCRIPTION VALUE MFG PART NUMBER

V-Jl 2 JACK BNC PAN EL AMPH UG-1094/u

V-J2 SAME AS J1

V-J3 2 JACK SMA PANEL OSM 220

V-J4 SAME AS J3

TEGORY NO. 8-

DSGN QTY

1 V-Sl 1

•SWITCHESDESCRIPTION

SWITCH DPDT LOCKING

VALUE MFG FART NUMEER

3 AMP ALCO MSTL-206N

173
L.D.D. 1 DEC 77 PARTS LIST- NOISE ADD PWR SUPPLY (V) DATA 12

CATEGORY NO. 10 HARDWARE

174
*A 12

UMBER

USEER

P*^* ^ ^7 PALTS LIST- DUAL NOISE-ADD STANDARD ( V« LATA 17

UMBER

IE GORY NO. 6- Pfvjf.1 rrT-np c DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

11 Vv-Jl 1 CONN PANEL N-SMA (JKS) COAX OSM 21011

12 W-J2 2 CONN PANEL SMA-SMA COAX CSM 209A

3 W—«J 3 SAME AS J2 COAX

|4 N“P1 2 CONN SMA- .141 SEMI RIG COAX OSM 20 1-1

A

5 W-P2 SAME AS PI COAX

16 N-P3 2 CONN EL SMA- .141 S-RIG COAX OSM 221-1

7 Vv-P4 SAME AS P3 COAX

8 W--P5 4 CONN SMA- SKA (PLUGS) COAX CSM 218

9 K-P6 SAME AS P5 COAX

0 W-P7 SAME AS P5 COAX

1

\ W-P8 SAME AS P5 COAX

|i

• r*.

J- rrnpv LOviVl IIM rO. ® Jli nU DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 I* —II

1

1 HOUSING MILLED OUT ELK ALUM NBS CL X3.25W X2.63D

2 IT— II

2

1 HOUSING FRONT PANEL .125 ALUM nES 6L X 3.25W

3 H3-H6 4 SCREW ( PAN L CONN) 4-40 . 25

4 E7-H24 18 SCREW (FACE P AN L ) 4-40 .375

VIE GORY NO. 12 SUEASS EMELI LS

i DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 W-Nl 2 DUAL NOISE DIODE ASS 'Y NBS 2766480

2 W-N2 SAME AS Nl

3 W-Ml 2 COUPLER 3dB QUADRATURE COAX MERE QHM-2-6AG

4 W-M2 SAME AS Ml COAX

5 W-M3 203356 2 TEE/DC BLK/MONITOR SMA COAX OSM

6 W-M4 SAME AS M3 COAX

7 W-M'5 3 TERMINATION MIN SMA 50 OHM OSM 20020P

8 W-M6 SAME AS M5 50 OHM

9 W-M7 SAME AS M5 50 OHM

175
L.D.D 1 DEC 77 PARTS LIST- DUAL NOISE-ADD STANDARD (W) DATA

CATEGORY NO

DSGN

1 ft-Al

2 ft- A 2

13 MISCELLANEOUS

QTY DESCRIPTION VALUE KFG PART NUMBER

1 CABLE .14 1 S-RIG COAX 3 UN IF

1 CABLE .141 S-RIG COAX 1 UN IF

176
M

1EER

D.D. 1 DEC 77 PARTS LIST- NOISE ADD CONST I CARD (VCOO) DIO

VTEGORY NO. •RESISTORSDSGN OTY DESCRIPTION VALUE MFG PART

1 V8-R1 16 RES FXD WW .025% 1/4W SELECTED ULTX 205A

2 V8-R2 SAME AS Rl SELECTED

3 V8-R3 SAME AS Rl SELECTED

, 4 V8-R4 SAME AS Rl SELECTED

1 5 V8-R5 SAME AS Rl SELECTED

i 6 V8-R6 SAME AS Rl SELECTED

7 V8-R7 SAME AS Rl SELECTED

8

' V8-R8 SAME AS Rl SELECTED

9 V8-R9 2 RES FXD CARB 5% 1/ 4W 10K OHM AB CB

10 V8-R10 2 RES FXD CARB 5% 1/4W 510 OHM AB CE

11 V8-R11 SAME AS Rl SELECTED

12 V8-R12 SAME AS Rl SELECTED

13 V8-R13 SAME AS Rl SELECTED

L4 V8-R14 SAME AS Rl SELECTED

L5 VB-P.15 SAME AS Rl SELECTED

1C V8-R16 SAME AS Rl SELECTED

17 V8-R17 SAME AS Rl SELECTED

18 V8-R18 SAME AS Rl SELECTED

19 V8-R19 SAME AS R9 10K OHM

20 V3-R20 SAME AS R10 510 OHM

AB EE

21 V8-R21 z RES FXD CARB 5% 1/2V, 1.5K OHM

22 V8-R22 SAME AS R21 1.5K OHM

hTEGGRY NO. CAPACITORSDSGN CTY DESCRIPTION VALUE MFG

i V8-C1 3 CAP HI-K MONO 50V 1.0 UF

1.0 UF

1.0 UF

SPRG

! 2 V8-C2 SAME AS Cl

1 3 V8-C3 SAME AS Cl

PART NUMBER

5C 023105X025053

177
L.D.D. 1 DEC 77 PARTS LIST- NOISE ADD CONST I CARD (V800) DIO

CATEGORY NO. 3 TRANSISTORS

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 V8-Q1 2 TRANSISTOR SILICON PNP 2N3906 MOT 2N3906

2 V8-Q2 SAME AS Q1

4

2N3906

CATEGORY NO. 4- DIODESDSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 V8-CR1 2 DIODE ZENER 12.7V IN 5 2 4 2 A MOT IN 5 24 2

A

2 V8-CR2 SAME AS D1 1N5242A

r*

L< tja rp1

r*

J-j n\j C\U x\t> vX wnlSl U • 0 “ 1

1

IX ^ K/X 1 lx L> dhL U 1 1 j

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

l V8-IC1 2 INT. CRKT . OP AMP GP-05C MONO OP-G5

2 V8-IC2 SAME AS I Cl OP-05C

3 V8-IC3 z I.C. OPTICAL COUPLER LIT-5 LTI-5

4 V8-IC4 SAME AS IC3 LIT5

5 V8-IC5 1 VOLTAGE-REF. PREC 10V CV PVSN 10G

i

l

1

1

n T\rw n r\T>\T at r\ r rmi>t r h T'O. p c*

i

1 b* c\ X lx \j x\ X IN \ta/ • D UU1N IN L*v^ lb 1\wj |

DSGN QTY DESCRIPTION VALUE MFG PART • NUMBER

i V8-J1 1 JACK IC DUAL IN-LINE 14 PIN SAMT I C-314-SGG

2 V8-J2 2 CONNECTOR COAXIAL BNC AMPH UG-1094/u

3 V8-J 3 2 CONNECTOR COAXIAL SMA OSM 220

4 V8-J4 SAME AS J2 BNC

5 V8-J5 SAME AS J3 SMA

i

178
10 1 DEC 77 D.D. DIO

""fLEGORY NO.

DSGN

1 V 8-El

2 V8-H1

j

’* 'fl'EGCRY NO

DSGN

jL V8

PARTS LIST- NOISE ADD CONST I CARD (V800)

10 HARDWARE

QTY DESCRIPTION VALUE MFG PART NUMBER

1 PC BRD - CONST. I CRKT NBS PC-800

2 SCREW (CERTA-VOLT)

12 — SUBASSEMBLIES

QTY DESCRIPTION VALUE MFG PART NUMEER

1 CONST. CURRENT PC CARD NBS V800
L. D. D 1 DEC 77 PARTS LIST- NOISE ADD PWR SUPPLY CARD (V900) di:

CATEGORY NO. 6 CONNECTORS

DSGK QTY DESCRIPTION VALUE MFG PART NUMBER

1 V9-J1 2 JACK IC DUAL IN-LINE 14 PIN SAMT IC-314-SGG

2 V9-J2 SAME AS J1 14 PIN

CATEGORY NO. 10 HARDWARE

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

1 V 9-El

2 V9-H1

3 V9-H2

4 VS-H3

5 V9-H4

1 PC BRD-PWR SUPPLY CRKT NBS PC-900

1 BRACKET - PWR SUPPLYS .062 AL

4 SCREW 4-40 3/4

4 NUT 4-40

4 WASHER LOCK 4-40

CATEGORY NO. 12 SUBASSEMBLIES

DSGN QTY DESCRIPTION VALUE MFG PART NUMBER

V 9 1 POWER SUPPLY CARD NBS V900

V9-M1

V9-M2

2 MODULAR POWER SUPPLY

SAME AS Ml

+-15V

+-15V

BB 527

180

*
9 . 7 D rawings

NOISE

OUTPUT

#2

CONTROL

#1

Figure 36. Noise-Add Schematic.

181

4 PIN DIP SOCKET POWER IN

SCHEfAATIC. NOISE ADO , (OU5TAM

CUfcRST <i-6 >-» E ttftTO R C4R.Q

-oo.L 3E.

UMHTTU) • • —wii’—

•" “t- miffTwiD

1 ! Z7U*So - V8oo

Figure 37. V800 Noise-Add Constant Current Schematic.

R9

Q | IOK ? £ £ £

£

SELECTED

1C - I OP- 05 £££

© © 6

£

6 o

JUMPER

A b

-

IL-5 999

)lC-4

J4 o

jO

,0 0 0

ledO

MR22

I.5K

-I5VO ©

£

CR2 R2 °

IN5242 510

N*L DATE OF DRAW I f

NOMENCLATURE utoo NATIONAL BUREAU OF STANDARDS

WASHINGTON. D. C. 20234 AS5T, NOISE ADD. C0KIS7ANT CURRENT GE (0

fob eARTH TERMINAL

MEASURE WiEWT SYSTEM

MODEL ~T/~ TYPE SCALE D»«mHAN

/rittiMiff*-

CHCCKCB

DECIM FRACT

OLUANCD MOJICT INO* aaoJBCT iho»

ALS ±.OOS ONS ±.OIS

SUBMITTID BY

ANGLES ±H‘

CMIBF KMOINISB DO WOT tCAU TWt MJWT

WV. *K. THIS PRINT ISSUED

1 1 27U180-V80O

Figure 38. V800 PC Assembly Drawing.

185

r

15V

POWER

SUPPLY r

15VL

r

15VL

POWER

SUPPLY

15VL

J2-2

J 2 -13

J2-4

+I5VDC

GND

J2~6 -15 VDC

-< GND

-< -30 VDC

NOMENCLATURE NATIONAL BUREAU OF STANDARDS

WASHINGTON, D. C. 20234

SCHEMATIC, NOISE ADD POW^ SUPPCy BD

FOR £AS?TH TtRAAlWAl

MtA^Ukc/.>£KJT SYS T&AA

• e(JL tpmdlfd I DECIMALS

FRACTIONS ANGLES

WKXJECT (NO*

276 M80 -V90O

Figure 39. V900 Power Supply Schematic.

187

. DATE OF ORA*

- POWER SUPPLYS MOUNTED ON BACK SIDE

ASSY, NOISE ADD PWR SUPPLY SOAfcD

NOMENCLATUR NATIONAL BUREAU OF STANDARDS

WASHINGTON. D. C 20234

for earth terminal

measurement system

MODEL TYPE SCALE

DIMKNRlONR IN INCHES

1 VmUm olArrwu* W1/1N

I

DECIMALS tool FRACTIONS ±.OIR ANGLES ±H*

DRAFTSMAN CHKCKKR

PROJECT INQR PROJECT INQR

SURMITTSO Y

OO MOT KAU THU FSMfT

THIS

MV. UC

PRINT ISSUED

APPROVED RY

1 1 z7G(o^eo-\j^oo

Figure 40. V900 PC Assembly Drawing.

189

10. INTERCONNECTION CABLES

10.1 CABLE LIST

QTY

RQD

DESCRIPTION FROM/ TO

5 15 cm (6 inch) BNC Coax

1 60 cm (2 ft.) Type "N" RF Det. Input

1 120 cm (4 ft.) Type "N" Coax

1 15 cm (6 inch) Type "N" to Term. IF Adaptor

2 6 meter (20 ft.) BNC with BNC to Type "N" Adaptor J-653/J-654

and Type "N" Female Plug

1 45 cm (18 inch) Rigid SMA to Type "N" Coax

2 90 cm (3 ft.) BNC with BNC to Type "N" Adaptor

1 10 cm (4 inch) Adaptor Type BNC to Viking 5 Pin J357

(Aux Voltage Input)

1 BCD I/O Cable No. 3 J400/9830

1 BCD I/O Cable No. 2 J352/9830

1 TTL I/O Cable No. 4 J650/9830

1 Cassette I/O Cable No. 5 9865A/9830

1 Printer I/O Cable

i A.C. Power Interconnect 9866B/9830

1 RF Unit to MUX Control J651/J653

1 RF Unit Analog Voltages J655/J355

1 Bridge Voltage J654/Pwr. Det.

Remote

1 Temp. Dew. Pt. from MUX J356/J456

1 . DVM to MUX Control J351/ J201-202

1 DVM Input J204/MUX

7 A.C. Power Cords

2 1.5 meter (5 ft.) Noise Add. SMA

1 Dew Point Sensor

1 Temperature Sensor

1 30 meter (100 ft.) Dew. Pt. Sens. Ext. Cable

2 15 meter (50 ft.) Temp. Sens. Ext. Cables

191
1

or

CLZDO

192

i

Figure

41.

System

Interconnection

Cables.
10.2 Cable Wiring List

MULTIPLEXER/DVM BCD I/O CABLE 1 1 203A

Signal Source

1 0OK J351-21

10K J351-17

IK J351-13

100K J351-4

10K J351-5

IK J351-1

GND

20K J351-18

2K J351-14

200K J351-10

20K J351-6

2K J351-2

GND

40K J351-19

4K J351-15

400K J351-11

40K J351-7

4K J351-3

GND

80K J351-20

8K J351-16

800K J351-12

8OK J351-8

8K J351--4

1 Y1 00-58

2 Y1 00-51

3 Y1 00-42

4 Y1 00-38

DC J351-26

AC J351-27

Ohms J351-28

NC

til 11 Y1 00-3

HI n Y1 00-3

it} n Y 100-3

11 1 11 Y 100-3

GND

Overrange J351-30

Carry Y1 00-3

Direct Command J351-46

Data Ready J351-34

GND

Polarity( ) J351-29

J352

12

3

4

5

6

7

8

9

10

1

1

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

NC

NC

NC

Wire # BCD I/O Card

_925 D4-1 - 5 D5-1 - 4 D6-1 - 3 D7-1 - 2 D8-1 - 1 D9-1

—934 D4-2 - 91 D5-2 - 7 D6-2 _ 8 D7-2 - 9 D8-2 - 90 D9-2

- 938 D4-4

_902 D5-4 - 93 D6-4 . - 94 D7-4 - 95 D8-4 - 96 D9-4

-956 D4-8

-912 D5-8

-904 D6-8

-905 D7-8

_ 906 D8-8

-907 D9-8 - 0 EXP-1

-913 EXP-2 - 97 EXP-4

-908 EXP-8 - 6 Function-1 - 92 Function-2 - §8 Function-4

- 903 Func tion-8

- 91 8 D1 -1 _ 923 D2-1

-924 D3-1

-928 D3-2

-948 D3-8

-937 D3-4

-926 D1-2

- 927 D2-2

-935 D1-4

-936 D2-4

-914 Overrange

-916 EXP Sign

- 946 D1-8

-947 D2-8

-958 Control 1 - 967 Flag

-968 GND

-901 Polarity(—

)

-917 Logic Select(—

)

-915 Logic Selec t(+)

- 945 H/L

- 957 CTL 2

193
CLOCK I/O CABLE 1 1 203A

Signal Source P400/J11

c 10's Day X3-4 1 B

11 ii X3-6 2

A 11 n X3-8 3

D 11 1 11 Day X3-10 4

C

11 it X3-12 5

B

11 it X3-14 6

A

11 11 X3-16 7

B 10«s Month X3-18 8

A

It II X3-20 9

D 11 1 11 Month X3-22 10

C

11 11 X3-24 1

1

B

11 it X3-26 12

A

11 11 X3-28 13

D 10's Day X3-30 14

Pwr Fail J2-7 15

A 11 ^ n Second J2-L 1

6

B

If 11 J2-K 17

C

11 11 J2-9 18

D

it it J2-1 0 19

A 10's Second J2-N 20

B

ti 11 J2-M 21

C

n 11 J2-1

1

22

D

1: it J2-1

2

23

A "1" Minutes J2-5 24

B

If it J2-R 25

C

11 11 J2-14 26

D

It It J2-15 27

A 10's Minutes J2-U 28

B

11 11 J2-T 29

C

ti it J2-16 30

D

ti n J2-17 31

A 11 ^

11 Hours J2-X 32

B

it It J2-W 33

C

11 ti J2-19 34

D

11 n J2-20 35

A 10»s Hours J2-2 36

B

11 11 J2-Y 37

C

11 11 J2-21 38

D

11 11 J2-22 39

Command X3-35 40

Ready Flag X3-33 41

42

D 10*s Month X3-32 43

C

11 11 X3-40 44

n ^11 X3-43 45

11 1

11 X3-44 46

GND 47

48

X3-59/GND 49

GND 50

NC

NC

NC

Wire # BCD I/O Card

936 D2-4

927 D2-2 T •923 D2-1

948 D3-8 „ 937 D3-4 F 928 D3-2

924 D3-1 F] - 92 Function-2

6 Function-1 ri .946 D1-8

-935 D1

r, 926 D1 -2 F, 918 D1-1

947 D2-8 FI 914 Overrange

- 1 D9-1

FI -90 D9-2

-96 D9-4

907 D9-8 FI - 2 D8-1

-9 D8-2 FI -95 D8-4

906 D8-8 7 , -3 D7-1

-8 D7-2

-94 D7-4 Zr 905 D7-8

4 D6-1

i' - 7 D6-2 Lr

- 93 D6-4 nr 904

Cl D6-8 p

s • D5-1

- 91 D5-2 ttc 902 D5-4

912 D5-8

jj^ 925 DF-1 ^

934 D4-2

938 D4-4 ' m

956 D4-8

958 CTL-1

967 Flag

: 903 Function-8 p*

98 Function -4

916 EXP Sign

913 EXP-2

917 Logic Select(f3^

963 GND

7 901 Polarity

0 EXP-1

97 EXP-4

908 EXP-8

957 CTL-2

945 H/L

if

915 Logic Select(f'

I

194
jto Break Point Switch

59

58

57

56

55

54

53

52

Ip 1 00-45

15700-47

Sffl 15700-29

5700-35

5700-32

15700-38

5700-26

Bf(i d 5700-23

d

15700-55 Mm

Funct ii* m

Lojr, 700-53

.400-55

PollI

Zffl SO? - Effll;:ND

$

RF UNIT INTERFACE CABLE

1 1 202A

Cable

J650 H.P. wire #

0

1

2

3

4

5

6

7

1

2

4

8

16

32

64

NC

NC

logic) ;ND

1

2

3

4

5

6

7

8

9

10

n

12

13

14

15

16

17

18

19

20

21

22

23

24

0 -

1 -

2 -

3

-

4 -

5 -

6 -

7

-

90

91

92

93

94

95

96

97

98

902

901

8 -

9 -

903

904

NC

Output Bits

u

8 Eit I/O Card

0 Input Bits

1

2

"

3

4

5

6

"

7

"

0

1

2

3

4

5

6

7

CTL

STP

I/O

FLG

ECH

GND

GND

195
CONTROL

CABLE

•H a- lA V=“ VO <\J O VO VO

£> -d- (A (\l (A fA -d~ fA -d" lA

I 1 1 1 I l 1 1 t Ip O . O O O O O O O O

K O O o o O o O O o

A- A- A- A- A~ A- A- A- -dts3 tsJ ts3 tS3 tsi ts3 CO CvJ ts3

/*A ^—

s

A) S

/^s /-> /^S W o S O to < PQ o Q v-' W 0. p

'w' >— VO rvj -d- O iH

r~ <\J -d- OO f~ (A vo p

<3 O

> P P p -p P -p P P

•H •P •P •P •P •P SQ •H O o O Eh 5 LA

PQ PQ PQ CQ PQ PQ O PQ S3 !3 S5 O +
RF POWER DETECTOR

Multiplexer

alog GND

Hi

Hi

Hi

P

874A-H55

Cables

PI 02

197

Remote

Emitter

Error Flag

Collector

-DVM

DVM

EI1 +

E+
TEMPERATURE/DEV/

POINT

ANALOG

CABLE

KW

X

MUX MUX

=

_

OJ

TS 5 *» =& 2^ £

o Xi % si =tfc bO bo bO •H O •H O

o « t-3 tsj h! iH «- •* •*

Ctf C O o o o

< EH Eh EH Eh

ft ft 'CJ c s £ a £

o © o © C5

Eh B

EH g •P fi B

a o -p O

© o a O

•H •H

,Q O

a ft

tC©

n

198
RF

UNIT

ANALOG

CABLE

x x

psH

*d

c

cdtoo

rH

ttf fl <

o

E-t

K"\ %

X!

bO H

K

O

Eh

4"%

&

bn

•HW

o

Eh

T3a

CD

too

rH

ctf rt <

o

Eh

vO

43

hO •HW

o

Eh

PS

'd

a

CD o

OJ+

>

aj+

•drH

•H

43

CO

3

-pX

199
HX

PQ<UH

13XX$x>—i xD

<:

piHXwX

Ph

i—) H

-1X

=B= XwXXchHu
ACKNOWLEDGMENTS

This measurement system was developed through the combined efforts of a

large number of people. This author is indebted especially to William C. Daywitt,

Lanny D. Driver, and David F. Wait for the development of the theory and extensive software; to Gerome R. Reeve for the initial equipment design; and to

Thomas H. Bremer and Douglas P. Kremer for their efforts in the packaging design

and assembly.

201
REFERENCES

[1] Larsen, N. T. , "A New Self-Balancing D-C Substitution RF Power Meter," IEEE

Transactions on Instrumentation and Measurement, Vol. IM-25, No. 4, pp. 343-347,

Dec. 1976.

[2] Wait, D. F., "ETMS Operations Manual," NBSIR 78-879, Dec. 1977.

[3] Wait, D. F., W. C. Daywitt, M. Kanda, and C. K. S. Miller, "A Study of the

Measurement of G/T Using Cassiopeia A," NBSIR 74-382, June 1974.

i

[4] Dent, W. A., H. D. Aller, E. T. Olsen, "The Evolution of the Radio Spectrum

of Cassiopeia A," The Astrophysical Journal, 188, PPLll-13, Feb. 1974.

I [5] Daywitt, W. C., "Error Equations Used in the NBS Precision G/T Measurement

System,," NBSIR 76-842, Sept. 1976. '

ft

[ 6 ] Daywitt, W. C., "Error Equations Used in the NBS Earth Terminal Measurement

System," NBSIR 78-869, Dec. 1977.

j

] 1 1

:

; i [7] Kanda, M. , "An Improved Solid-State Noise Source," IEEE Transactions on •!

5 Microwave Theory and Techniques, Vol. MTT-29, No. 8 , pp. 990-995, Dec. 1976. '1 1

I!

* I

[ 8 ] Larsen, N. T., "NBS Type IV RF Power Meter Operation and Maintenance,"

NBSIR 77-866, Oct. 1977. }

[9] Smith, J. I., Modern Operational Circuit Design, pp. 155-160, Wiley InterScience, New York (1971)

.

'

[ 10 ] The Fahrenheit temperature scale is used instead of the Celcius scale

because it is easier to implement a temperature scale which is non-negative

i over the measurement range.

202
APPENDIX A: SPARE PARTS AND SUPPLIES

3 Boxes Paper

1 Box Prog. Cassettes

I Box Blank Cassettes

1 Logic Probe

1-15V Power Supply

1-5V Power Supply

1-12V Power Supply

1-20 Power Supply

1-Type IV Power Meter

1-Temp/DP Enclosure/W Probes

1-11202A Card

1-11203A Card

1-Aertech Amplifier

1-1C Test Clip

1 -Dew-point Bobbin

1-Coax Relay

1-Aux Mux Adapter

1-HP 478A-H55

1-

PC ext. Card.

2

Mux Relays

2 -LED

1-SN 74159N

1-

MC 201 Noise Diode

2-

0P-05 Amp.

1-7824 Voltage Regulator

1-15 meter (50 ft.) Probe Ext. Cable Red

1-15 meter (50 ft.) Probe Ext. Cable Blue

1-30 meter (100 ft.) Probe Ext. Cable

60 meter (200 ft.) Nylon Cord

1-Fan

1-X1 PC Card

1-X2 PC Card

1-X3 PC Card

1-Y100 PC Card

1-Y200 PC Card

1-Z400 PC Card

1-Z500 PC Card

1-Z700 PC Card

203
APPENDIX B

PARTS LIST MANUFACTURER’S CODE TABLE

3M

3M Company, Electronics Products Division

3M Center

St. Paul, Minnesota 55101

AB

Allen-Bradley Company

1201 S. Second Street

Milwaukee, Wisconsin 53204

AERT

Aertech Industries

825 Stewart Drive

Sunnyvale, California 94086

ALCO

Alcoswitch Division of Alco Electronic Products, Inc.

P.0. Box 1348

Lawrence, Massachusetts 01842

ALPH

ALPHA Wire Corporation

711 Lidgerwood Avenue

Elizabeth, New Jersey 07207

AMER

American Microwave Connector Division

Omni Spectra, Inc.

Waltham, Massachusetts 02154

AMPH

Amphenol Connector Division

Bunker-Ramo Corporation

Broadview, Illinois 60153

AVNT

Avantek Incorporated

3175 Bowers Avenue

Santa Clara, California 95051

Burr-Brown Research Corporation

6730 South Tucso^ Blvd.

Tucson, Arizona 85734

BELD

Beldon Corporation, Electronic Division

P.0. Box 1331

Richmond, Indiana 47374

204
BRNS

Bourns, Incorporated, Trimpot Division

1200 Columbia Avenue

Riverside, California 92507

BUD

Bud Radio Incorporated

4605 East 355th Street

Willoushby, Ohio 44094

CAMB

Cambridge Thermionic Corporation

445 Concord Avenue

Cambridge, Massachusetts 02138

CD

Cornell-Dubilier Electronics Division

Federal Pacific Electric Company

Newark, New Jersey 07101

CHGM

Chicago Miniature Lamp Company

4433 North Ravenswood Avenue

Chicago, Illinois 60640

CIRQ

Ciratel Incorporated

10504 Wheatley Street

Kensington, Maryland 20795

CNCH

CINCH/TRW Electronic Components Div.

1501 Morse Avenue

Elk Grove Village, Illinois 60007

C0RG

Corning Glass Works

Electronic Products Division

Corning, New York 14830

CORM

Corcom, Incorporated

2635 North Kildare Avenue

Chicago, Illinois 60639

i CORN

Corning Glass Works

Electronic Products Division

Corning, New York 14830

I COTO

Coto-Coil, Incorporated

65 Pavilion Avenue

Providence, Rhode Island 02905

205
CROM

Corcom, Incorporated

2635 North Kildare Avenue

Chicago, Illinois 60639

CY

Codi Semiconductor Corporation

Pollitt Drive

Fair Lawn, New Jersey 07410

DATL

Datel Systems, Incorporated

1020 Turnpike Street

Canton, Massachusetts 02021

DEST

Destek Industries

P.0. Box 24163

Los Angeles, California 90024

DIAL

Dialight Corporation

Division of North American Phillips Corporation

Brooklyn, New York 11237

DLVN

Devalon Electronics, Inc.

14605 North 73rd Street

Scottsdale, Arizona 85260

DUNC

Duncan Electric Company, Incorporated

2865 Fairview Road

Lafayette, Indiana 47902

EFJ

E. F. Johnson Company

299 10th Avenue

Waseca, Minnesota 56093

GARY

Garry Manufacturing, Inc.

1010 Jersey Avenue

New Brunswick, New Jersey 08902

GE

General Electric Company

Electronic Components Division

Hudson Falls, New York 12839

GRAY

Grayhill, Incorporated

569 Hillgrove Avenue

La Grange, Illinois 69525

206
HP

Hewlett Packard Company

1501 Page Mill Road

Palo Alto, California 94304

INIF

Uniform Tubes, Incorporated

Microdelay Division

Collegeville, Pennsylvania 19426

ITSL

Intersil, Incorporated

10900 North Tantau Avenue

Cupertino, California 95014

LAMB

Lambda Electronics Corporation

Division of Veeco

Melville, New York 11746

LCFT

Leecraf t Mfg. , Inc,

21-16 44th Road

Long Island City, N.Y. 11101

MALL

P. R. Mallory & Company, Incorporated

P.0. Box 372

Indianapolis, Indiana 46206

MERR

Merrimac Industries, Incorporated

41 Fairfield Place

West Caldwell, New Jersey 07006

MID

Midwest Microwave, Incorporated

3800 Packard Road

Ann Arbor, Michigan 48104

MIDW

Midwest Microwave, Incorporated

3800 Packard Road

Ann Arbor, Michigan 48104

M0DT

Modutec, Incorporated

18 Marshall Street

Norwalk, Conneticut 06854

MONO

Precision Monolithics, Incorporated

1500 Space Drive

Santa Clara, California 95050
MOT

Motorala Semiconductor Products, Incorporated

2002 West 10th Place

Tempe, Arizona 85281

NATL

National Semiconductor Corporation

2900 Semiconductor Drive

Santa Clara, California 95051

NBS

National Bureau of Standards

Division 723.05 325 South Broadway

Boulder, Colorado 80303

NEPT

Newport Laboratories, Incorporated

630 East Young Street

Santa Clara, California 92705

NLS

Non-Linear Systems, Incorporated

533 Stevens Avenue

Solana Beach, California 92075

OSM

Omni Spectra, Incorporated

21 Continental Blvd.

Merrimack, New Hampshire 03054

PANM

Pamotor, Incorporated

770 Airport Blvd.

Burlingame, California 94010

POMA

Pomona Electronics, Incorporated

P.0. Box 2767

Pomona, California 91766

RCA

Radio Corporation of America

Front & Cooper

Camden, New Jersey 08102

SAE

Stanford Applied Engineering, Incorporated

340 Mar tain Avenue

Santa Clara, California 95050

SAMT

Samtec, Incorporated

2652 Charlestown Road

New Albany, Indiana 47150

208
SCBE

Scanbe Canosa Industries

3445 Fletcher Avenue

El Monte, California 91731

SEAC

Seacor, Incorporated

598 Broadway

Norwood, New Jersey 07648

|l SEMI

Semiconductor Circuits, Incorporated

306 River Street

Haverhill, Massachusetts 01830

SPRG

Sprague Electric Company

481 Marshall Street

North Adams, Massachusetts 01247

SWCT

Switchcraft, Incorporated

5555 North Elston

Chicago, Illinois 82389

3 TELC

Telonic Altair, Incorporated

P.0. Box 277

Laguna Beach, California 92652

TELD

Teledyne Microwave, Incorporated

1290 Terra Bella Avenue

Mountain View, California 94040

TI

Texas Instruments, Incorporated

P.0. Box 5012

Dallas, Texas 75222

TR0M

Trompter Electronics, Incorporated

8936 Comanche

Chatsworth, California 91311

I

j ULTX

Ultronix, Incorporated

P.0. Box 1090

Grand Junction, Colorado 81501

| UNIF

Uniform Tubes

Microdelay Division

Collegeville, Pennsylvania 19426

209
UT

Uniform Tubes

Microdelay Division

Collegeville, Pennsylvania 19426

VIKG

Viking Industries, Incorporated

9324 Topanga Cyn Blvd.

Chatsworth, California 91311

WAKE

Wakefield Engineering, Incorporated

Teal & Audobon Road

Wakefield, Massachusetts 01880

WEIN

Weinschel Engineering Company

P.0. Box 577

Gaithersburg, Maryland 20760

YSI

Yellow Springs Instrument Company

P.0. Box 279

Yellow Springs, Ohio 45387

210
APPENDIX C

CONTROL CODES

Program Switches and WBYTE

24 DVM AUTO RANGE

27 DVM 0.1 RANGE

28 DVM 1 . 0 RANGE

29 DVM 10.0 RANGE

30 DVM 100.0 RANGE

31 DVM 1000.0 RANGE

32 DVM DC VOLTS FILTER OUT

33 DVM DC VOLTS FILTER IN

34}

35

J DVM RATIO-NOT USEDi IN E' 48 PROG ATTNR 15 dB

47 PROG ATTNR 14 dB

62 PROG ATTNR 1 dB

63 PROG ATTNR 0 dB

64 RF OFF/ 6 dB STEP IN

65 RF ON/ 6 dB STEP OUT

66 RF OFF

67 RF IN

68 6 dB IN

69 6 dB OUT

80 NOISE ADD ON

81 NOISE ADD OFF

82 NOISE ADD #1 ON

83 NOISE ADD #1 OFF

84 NOISE ADD #2 ON

85 NOISE ADD #2 OFF

100 INPUT CHANNEL #11 DVM

101 INPUT CHANNEL #10 DVM

102 INPUT CHANNEL # 9 DVM

103 INPUT CHANNEL # 8 DVM

104 INPUT CHANNEL # 7 DVM

105 INPUT CHANNEL # 6 DVM

106 INPUT CHANNEL # 5 DVM

107 INPUT CHANNEL # 4 DVM

108 INPUT CHANNEL # 3 DVM

109 INPUT CHANNEL # 2 DVM

110 INPUT CHANNEL # 1 DVM

111 INPUT CHANNEL # 0 DVM

211

NBS-1 14A (REV. 7-73)

"u.S. DEPT, ot- COMM.

BIBLIOGRAPHIC data

SHEET

1. PUBLIC ATION OR REPORT NO. NBSIR 78-895

2. Gov't Accession

No.

3. Recipient '& Accession No.

4. TlTLli ANL) SUM i 1 1 LiEarth Terminal Measurement System Maintenance Manual

5. Publication Date September 1978

6. Performing Organization C ode 723.05

7. AUTHOR(S) John P. Wakefield

8. Performing Organ. Report No.

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Project/Task/Work Unit No. 723-5481

11. Contract/Grant No. &CC-414-74, Amendment

CC-025-76 , NBS #2765481

12. Sponsoring Organization Name and Complete Address (Street, City, State, ZIP)

United States Army Communications Command

Fort Huachuca, Arizona 85613

13. Type of Report & Period Covered

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

16. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here.)

This manual describes the equipment and maintenance procedures to support the earth

terminal measurements system (ETMS) developed by the National Bureau of Standards for

making measurements of earth terminal and satellite parameters such as figure of merit

(G/T) , antenna gain relative to a reproducible reference level, ratio of carrier power

to the operating noise temperature (C/kT) , and satellite effective isotropic radiated

power (EIRP) . System equipment specifications, site set-up instructions, equipment

theory of operation, troubleshooting and maintenance are included. This manual does not

include measurement theory nor measurement operating procedures that are described in

the Earth Terminal Measurement System-Operation Manual.

7. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper

name; separated by semicolons)

Earth terminal measurement system; effective isotropic radiated power, figure of merit

noise temperature; satellite communication.

8. AVAILABILITY [2? Unlimited

19. SECURITY CLASS

(THIS REPORT)

21. NO. OF PAGES

[ For Official Distribution. Do Not Release to NTIS UNCL ASSIFIED

223

Cl] Order From Sup. of Doc., U.S. Government Printing Office Washington, D.C. 20402, SD Cat. No. 03 —

20. SECURITY CLASS

(THIS PAGE)

22. Price

$9.25

USCOMM-DC 2904 2- P7

4

Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151

UNCLASSIFIED
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