CAUTION

ELECTROSTATIC DISCHARGE

SENSITIVE DEVICE

(THIS ELECTRONIC MEDIA VERSION 7/7/97, IS A REPRODUCTION BASED ON THE

PAPER VERSION AND IS TO BE USED FOR REFERENCE ONLY.)

INTERPRET DRAWING IN ACCORDANCE WITH

DOD-STD-100, ANSI Y14.5M-1982

DISPLAY, VIDEO, RIBBON WITH AUDIBLE ALARM BOX

NOTES:

1\. DESCRIPTION. THIS DRAWING ESTABLISHES THE PERFORMANCE AND DESIGN
REQUIREMENTS FOR THE RIBBON DISPLAY SUBSYSTEM PORTION OF THE DISPLAY
FUNCTION UNIT (DFU) FOR THE FEDERAL AVIATION ADMINISTRATION (FAA)
TERMINAL DOPPLER WEATHER RADAR (TDWR) SYSTEM.

1.1 COMMERCIALLY AVAILABLE EQUIPMENT. THE USE OF COMMERCIALLY AVAILABLE
EQUIPMENT TO PERFORM THE FUNCTIONS LISTED BELOW IS ACCEPTABLE PROVIDED
THAT THE FOLLOWING REQUIREMENTS ARE SATISFIED:

a.  THE PROPOSED COMMERCIALLY AVAILABLE DEVICE HAS PUBLISHED TECHNICAL
    DESCRIPTIONS AND OPERATIONAL ENVIRONMENTAL CHARACTERISTICS.

b.  THE RELIABILITY AND MAINTAINABILITY PROGRAM REQUIREMENTS ARE NOT
    DEROGATED.

c.  DOCUMENTATION REQUIREMENTS AS SPECIFIED IN FAA-D-2494 FOR
    INSTRUCTION BOOKS, SOFTWARE, HARDWARE, AND DATA FOR SPARE PARTS
    PECULIAR ITEMS SHALL BE SATISFIED.

d.  IDENTIFY THE IMPACT ON GENERAL REQUIREMENTS THAT MAY NEED TO BE
    RELAXED IN THIS DRAWING AND FAA-G-2100.

2\. REFERENCED DOCUMENTS. UNLESS OTHERWISE SPECIFIED, REFERENCED
DOCUMENTS OF

THE ISSUE IN EFFECT ON THE DATE OF THE PURCHASE ORDER OR SUBCONTRACT,
SHALL FORM A PART OF THIS DRAWING TO THE EXTENT SPECIFIED HEREIN.
WHENEVER REFERENCED DOCUMENTS CONFLICT WITH THIS DRAWING, THIS DRAWING
SHALL GOVERN.

3\. REQUIREMENTS

3.1 RIBBON DISPLAY DEFINITION. THIS SECTION CONTAINS THE DEFINITIONS OF
THE FUNCTIONAL CHARACTERISTICS OF THE RIBBON DISPLAY ASSEMBLY COVERED BY
THIS DRAWING AND FORMS PART OF THE DFU SUBSYSTEM IN THE TDWR SYSTEM. THE
RIBBON DISPLAY ASSEMBLY, HEREIN AFTER REFERRED TO AS THE DISPLAY UNIT
WILL BE REQUIRED TO DISPLAY ALPHANUMERIC MESSAGES CONTAINING HAZARDOUS
WARNING INFORMATION AND EQUIPMENT STATUS. THE DISPLAY UNIT SHALL BE
CAPABLE OF DECODING AND DISPLAYING MESSAGES AS WELL AS ACTIVATING THE
APPROPRIATE ALARMS AND INDICATORS.

3.2 ELECTRICAL CHARACTERISTICS

3.2.1 GENERAL. EACH DISPLAY UNIT SHALL BE A FULLY SELF-CONTAINED
ASSEMBLY INCLUDING ALL ELECTRONICS, POWER SUPPLIES AND CONTROLS USING A
FLAT PANEL DISPLAY WITH THE NECESSARY INDICATORS AND AN AUDIBLE ALARM
BOX. THE INTEGRATED STRUCTURE SHALL ENABLE THE DISPLAY UNIT TO BE
MOUNTED IN A SUSPENDED CONFIGURATION OR ON A FLAT SURFACE. ADEQUATE
VENTILATION SHALL BE PROVIDED TO INSURE THAT MOUNTING OPTIONS DO NOT
DEGRADE OR REDUCE THE RELIABILITY OF THE DISPLAY UNIT. THE FABRICATION
AND ASSEMBLY OF THE DISPLAY UNIT SHALL BE IN ACCORDANCE WITH THE
FAA-G-2100e. THE ASSEMBLY SHALL BE COMPLIANT WITH THE EMI EMISSIONS
REQUIREMENTS OF MIL-STD-461.

3.2.2 START-UP CHARACTERISTICS. THE DISPLAY SHALL REQUIRE NO MORE THAN
ONE ACTION FOR POWER TURN-ON AND FULL OPERATION.

3.2.3 DISPLAY PRESENTATION (IN ACCORDANCE WITH MIL-STD-1472 AND ANSI
X3.4) AND THE FOLLOWING:

(a) 25 ALPHANUMERIC CHARACTERS PER LINE, 10 LINES.

(b) 8.12 INCHES BY 12.375 INCHES MINIMUM VIEWABLE DISPLAY AREA FOR -1
    PART.\
    6.1 INCHES BY 9.3 INCHES MINIMUM VIEWABLE DISPLAY AREA FOR -3 PART.

(c) 0.55 INCH MINIMUM CHARACTER HEIGHT FOR UPPER CASE CHARACTERS FOR -1
    PART.\
    0.45 INCH MINIMUM CHARACTER HEIGHT FOR UPPER CASE CHARACTERS FOR -3
    PART.

3.2.4 INTERFACE. A SINGLE RS232D COMPLIANT INTERFACE, 9600 BPS, FOR THE
TRANSMISSION OF ALPHANUMERIC CHARACTERS TO AND FROM THE DISPLAY.

3.2.5 INDICATORS SHALL HAVE A VISUAL ALARM, FULL SUNLIGHT READABLE AND
AN AUDIBLE ALARM WITH A CHIME TONE SOUND, CONTROLS LOCATED ON THE FRONT
PANEL, AND ADJUSTABLE BETWEEN 60 dBA and 85 dBA (AT A DISTANCE OF ONE
METER FROM THE DISPLAY) BY MEANS OF A HAND ADJUSTABLE CONTROL.

3.2.5.1 AN OPTIONAL STAND-ALONE AUDIBLE ALARM UNIT HAVING THE SAME
CHARACTERISTICS AS THE RIBBON DISPLAY ALARM BUT WITH DISTINGUISHABLE
(FROM DISPLAY ALARM) SOUND SHALL BE PROVIDED. THIS ALARM UNIT SHALL
INTERFACE WITH A SUN 386i WORKSTATION VIA CENTRONICS OR RS-232 PORTS
WHICH SHALL ENABLE/DISABLE ALARM SOUND THROUGH A SUN SOFTWARE COMMAND.
RS-232 PORT MAY MAKE USE OF THE DTR (PIN 20) LOGIC SIGNAL.

3.2.6 CONTROLS SHALL BE IN ACCORDANCE WITH MIL-STD-1472 AND FAA-G-2100
WITH THE FOLLOWING:

a.  DISPLAY POWER ON/OFF.

b.  AUDIBLE ALARM DISABLE SWITCH PROTECTED FROM ACCIDENTAL CHANGING OF
    STATUS.

c.  AUDIBLE ALARM PUSH BUTTON RESET SWITCH, PROTECTED FROM ACCIDENTAL
    CLEARING OF ALARM.

d.  AUDIBLE ALARM VOLUME CONTROL, PROTECTED FROM ACCIDENTAL ADJUSTMENT.

e.  DISPLAY BRIGHTNESS ADJUSTMENT.

f.  AUTO BRIGHTNESS/MANUAL BRIGHTNESS CONTROL SWITCH.

g.  DIP SWITCH OR OTHER PROVISION FOR SETTING IN A UNIQUE IDENTIFICATION
    UP TO 8 IDENTIFIERS.

h.  BY-PASS SWITCH WHICH CAN BE ACTIVATED UPON UNIT FAILURE TO ROUTE THE
    SERIAL INPUT CHANNEL TO THE SERIAL OUTPUT CHANNEL. BY-PASS CIRCUITRY
    MUST PROVIDE FULL RS-232D DRIVE CAPABILITY.

i.  TEST SWITCH LOCATED ON THE FRONT PANEL THAT PROVIDES FOR
    COMPREHENSIVE SYSTEM DIAGNOSTICS AS DESCRIBED IN 3.2.8.

j.  PROVISION FOR OPERATING IN A REVERSE VIDEO MODE SELECTABLE BY THE
    OPERATOR ON THE DISPLAY UNIT FRONT PANEL. (OPTIONAL)

3.2.7 OPTICAL REQUIREMENTS (IN ACCORDANCE WITH MIL-STD-1472). THE USE OF
A HOOD SHALL NOT BE ALLOWED TO MEET THE FOLLOWING REQUIREMENTS.

a.  PIXEL LUMINANCE THROUGH A CIRCULARLY POLARIZED FILTER (IF USED)
    SHALL BE 50 FOOT-LAMBERT ± 4 PERCENT AT 2000 FOOT CANDLES AMBIENT
    ILLUMINATION.

b.  MINIMUM CONTRAST RATIO OF 3:1 AT 2000 FOOT CANDLES AMBIENT
    ILLUMINATION.

c.  MINIMUM VIEWING ANGLE OF ± 60 DEGREES HORIZONTAL AND ± 20 DEGREES
    VERTICAL AT 10 FEET.

d.  FULL SUNLIGHT READABLE.

e.  AMBIENT LIGHT SENSOR WHICH INCREASES DISPLAY BRIGHTNESS WITH
    INCREASE IN AMBIENT LIGHT LEVEL, DEFEATABLE TO ALLOW MANUAL
    BRIGHTNESS CONTROL.

3.2.8 DIAGNOSTICS. RESIDENT STAND ALONE DIAGNOSTIC PROGRAM SHALL BE
EMBEDDED WITHIN THE DISPLAY UNIT, AND CAPABLE OF BEING EXECUTED VIA
FRONT PANEL SWITCH REFERENCED IN 3.2.6. THE DIAGNOSTICS SHALL VERIFY THE
INTERNAL PROCESSORS, CONTROLLERS, MEMORY AND DISPLAY. THE DISPLAY SHALL
ALSO INCLUDE PATTERN GENERATION OF VISUAL VERIFICATION OF PATTERNS.

3.2.9 POWER. 120 ± 18 VOLTS AC, 60 ±3 HERTZ, SINGLE PHASE, 200 WATTS
PEAK MAXIMUM, AND SHALL MEET THE REQUIREMENTS OF FAA-STD-020.

3.2.10 MICROPROCESSOR/MICROCONTROLLER. THE DISPLAY UNIT SHALL BE
DESIGNED USING A MICROPROCESSOR/MICROCONTROLLER OF THE 68XXX FAMILY.

3.2.11 FUNCTIONAL CHARACTERISTICS SHALL BE AS FOLLOWS:

a.  THE DISPLAY SHALL RECEIVE AND DISPLAY MESSAGES

b.  EACH MESSAGE SHALL BE 25 DISPLAYABLE CHARACTERS OR LESS IN LENGTH.

c.  EACH MESSAGE SHALL BE ASSIGNED A LINE NUMBER FROM 1 TO 10.

d.  THE VISUAL ALARM SHALL BE EVIDENCED BY THE BLINKING OF THE
    ASSOCIATED MESSAGE OR CHARACTER FROM 0 PERCENT BRIGHTNESS TO FULL
    BRIGHTNESS AT A RATE OF 2-4 Hz.

e.  EACH MESSAGE SHALL HAVE AN IDENTIFIER THAT INDICATES WHICH OF THE
    EIGHT DISPLAYS THE MESSAGE SHALL BE TRANSMITTED TO. EACH RIBBON
    DISPLAY SHALL ACCEPT ITS ASSIGNED MESSAGE AND PASS ALONG ALL OTHERS.

3.2.12 SOFTWARE FUNCTIONAL DEFINITIONS:

a.  BLINK LINE: BLINK ALL CHARACTERS ON SPECIFIED LINE.

b.  BLINK CHARACTER.

c.  DISPLAY SELECT: ABILITY TO SELECT 1 OF 8 DISPLAYS.

d.  DISPLAY DESELECT: ABILITY TO DESELECT 1 OF 8 DISPLAYS.

e.  BYTE MODE: BUILT IN DISPLAY DIAGNOSTICS.

f.  BYTE MODE ACK: DISPLAY DIAGNOSTICS OK.

g.  LINE SELECT: SELECTION OF LINE TO DISPLAY CHARACTERS.

h.  ALARM ACK: ACKNOWLEDGE THAT ALARM HAS BEEN SERVICED.

i.  ALARM ENABLE: RS-232 COMMAND TO ACTIVATE ALARM.

j.  ALARM DISABLE: RS-232 COMMAND TO DEACTIVATE ALARM.

k.  ALARM STATUS: REPORTS STATUS OF ALARM DISABLE SWITCH, ENABLED OR
    DISABLED.

l.  INVOKE WATCHDOG TIMER: THE DISPLAY WILL BE CLEARED, AN ERROR MESSAGE
    DISPLAYED ON LINE #10 (COMMUNICATION FAILURE), AND THE AUDIBLE ALARM
    MOMENTARILY ACTIVATED IF NO HOST SERIAL DATA HAS BEEN DETECTED AFTER
    A GIVEN AMOUNT OF TIME. IF DATA IS DETECTED BEFORE THE END OF THE
    TIME INTERVAL, THE TIMER IS RESET. IF DATA IS DETECTED AFTER THE
    TIME INTERVAL, THE TIMER IS RESET AND THE MONITOR WILL ACCEPT
    COMMANDS AND DATA PER STANDARD OPERATION.

m.  WATCHDOG TIMER INTERVAL: THE TIMER INTERVAL IS PROGRAMMABLE OVER 256
    INCREMENTS FROM 18.25 SECONDS TO 77.8 MINUTES WHERE 0h IS MINIMUM
    AND FFh IS MAXIMUM. POWER OF DEFAULT IS APPROXIMATELY 1 MINUTE AND
    12 SECONDS.

n.  DISABLE WATCH DOG TIMER: TERMINATES WATCHDOG TIMER FUNCTION.

3.3 MECHANICAL

3.3.1 DESIGN AND CONSTRUCTION. DISPLAYS SHALL BE IN ACCORDANCE WITH
FAA-G-2100e AND FIGURE 1 OR 1A, OUTLINE DRAWING. MOUNTING PROVISIONS
SHALL BE INCLUDED SUCH THAT THE UNIT MAY BE SUPPORTED OFF A SURFACE
ORIENTED IN ANY PLANE, SEE FIGURE 3. OUTLINE DRAWING FOR STAND-ALONE
AUDIBLE ALARM IS SHOWN IN FIGURE 2.

3.3.2 CONNECTORS. THE RIBBON DISPLAY INPUT AND OUTPUT CONNECTORS ARE TO
BE SUCH THAT THE ASSOCIATED CABLES MAY BE MATED IF UNIT IS REMOVED FOR
REPAIR.

3.4 ENVIRONMENTAL CONDITIONS. DISPLAY(S) SHALL MEET THE ENVIRONMENTS
SPECIFIED IN FAA-G-2100e FOR ENVIRONMENT 1.

3.4.1 AMBIENT TEMPERATURE

3.4.1.1 OPERATING. RANGE SHALL BE +10 TO +50 DEGREES C.

3.4.1.2 NONOPERATING. RANGE SHALL BE -50 TO +70 DEGREES C.

3.4.2 ALTITUDE

3.4.2.1 OPERATING. RANGE SHALL BE SEA LEVEL TO 10,000 FEET.

3.4.2.2 NONOPERATING. RANGE SHALL BE SEA LEVEL TO 50,000 FEET.

3.4.3 HUMIDITY

3.4.3.1 OPERATING. 10 PERCENT TO 80 PERCENT, ABOVE 40 DEGREES THE
RELATIVE HUMIDITY SHALL BE BASED ON A DEW POINT OF 40 DEGREES C.

3.4.3.2 NONOPERATING. UP TO 100 PERCENT CONDENSING.

3.4.4 THE DISPLAY SHALL MEET THE ELECTROMAGNETIC SUSCEPTIBILITY AND
EMISSIONS REQUIREMENTS AS SPECIFIED IN MIL-STD-461.

3.5 MARKING. SHALL BE IN ACCORDANCE WITH MIL-STD-1285 AND SHALL INCLUDE
THE MANUFACTURER'S NAME OR SYMBOL, PART NUMBER, LOT CODE OR SERIAL
NUMBER, TERMINAL IDENTIFICATION, AND CIRCUIT DIAGRAM WHERE SPACE
PERMITS. ADDITIONAL MARKING AT MANUFACTURER'S OPTION. MARKING SHALL BE
ELECTRICALLY NONCONDUCTIVE AND CONFORM TO MIL-STD-202, METHOD 215,
SOLUTIONS a, b, AND c.

3.6 WORKMANSHIP. DEVICES SHALL BE MANUFACTURED AND PROCESSED IN A
CAREFUL AND WORKMANLIKE MANNER IN ACCORDANCE WITH GOOD DESIGN AND SOUND
PRACTICE AND SHALL BE FREE FROM DEFECTS THAT WILL AFFECT LIFE,
SERVICEABILITY, OR APPEARANCE.

3.7 LIFE EXPECTANCY. DISPLAY SHALL HAVE A MINIMUM SERVICE LIFE OF 7
YEARS.

3.7.1 MEAN TIME BETWEEN FAILURES (MTBF). THE RIBBON DISPLAY SHALL HAVE
AN MTBF OF 9,000 HOURS MINIMUM WHEN COMPUTED IN ACCORDANCE WITH
MIL-HDBK-217E FOR A GROUND FIXED ENVIRONMENT AND A 50 °C AMBIENT
TEMPERATURE.

4\. QUALITY ASSURANCE PROVISIONS

4.1 QUALITY CONFORMANCE INSPECTION. SHALL BE PERFORMED ON 100 PERCENT OF
THE PRODUCT IN ACCORDANCE WITH TABLE I HEREIN. ALL TEST PROCEDURES
GENERATED BY THE MANUFACTURER FOR ELECTRICAL TESTS SPECIFIED HEREIN
SHALL BE APPROVED BY THE PROCURING ACTIVITY PRIOR TO TEST PERFORMANCE.
DISCRETE TEST DATA FOR THE INSPECTION AND TESTS SHALL BE SUPPLIED TO THE
PROCURING ACTIVITY FOR THEIR APPROVAL.

4.2 MANUFACTURER'S CHANGES. SUBSEQUENT TO THE MANUFACTURER'S ASSIGNMENT
OF A PART NUMBER TO A DEVICE, DEFINED HEREIN, ALL DEVICES SUPPLIED
AGAINST THE PART NUMBER SHALL BE IDENTICAL WITH RESPECT TO DESIGN,
MATERIALS, FINISHES, CONSTRUCTION AND MANUFACTURING PROCESSES UNLESS
PRIOR WRITTEN AGREEMENT OF THE CHANGE HAS BEEN OBTAINED FROM THE
PROCURING ACTIVITY. FAILURE OF A MANUFACTURER TO COMPLY WITH THIS
REQUIREMENT SHALL BE SUFFICIENT CAUSE FOR WITHDRAWAL OF APPROVAL OF THE
MANUFACTURER FOR THE DEVICE AND FOR REJECTION OF ALL DEVICES AFFECTED BY
SUCH CHANGES.

4.3 PROCESS CONTROL. THE MANUFACTURER SHALL MAINTAIN A PROGRAM FOR THE
CONTROL OF ALL MANUFACTURING PROCESSES WHICH COULD HAVE A EFFECT UPON
THE QUALITY AND RELIABILITY OF THE END PRODUCT. PROCESS INSPECTION
PROCEDURES SHALL BE PREPARED WHENEVER NECESSARY TO SUPPLEMENT PROCESS
SPECIFICATIONS.

5\. PREPARATION FOR DELIVERY

5.1 PRESERVATION AND PACKAGING. SHALL BE SUFFICIENT TO AFFORD ADEQUATE
PROTECTION AGAINST CORROSION, DETERIORATION AND PHYSICAL DAMAGE DURING
SHIPMENT FROM THE MANUFACTURER TO POINT OF DELIVERY AND MAY CONFORM TO
THE MANUFACTURER'S COMMERCIAL PRACTICE WHEN SUCH MEETS THESE
REQUIREMENTS.

5.2 SPECIAL PRECAUTIONARY PROCEDURES. IN ORDER TO PROVIDE ASSURANCE THAT
ELECTROSTATIC SENSITIVE DEVICES ARE ADEQUATELY PROTECTED AGAINST
ELECTROSTATIC DAMAGE, THE FOLLOWING REQUIREMENTS SHALL APPLY.

5.2.1 MANUFACTURERS SHALL PROTECT THE DISPLAYS BY UTILIZING SHORTING
DEVICES SUCH AS, BUT NOT LIMITED TO, CONDUCTIVE FOAM,
CONDUCTIVE/ANTISTATIC TUBING, CONDUCTIVE/ANTISTATIC BAGS, SHORTING BARS,
SHORTING RINGS, SHORTING CLIPS, FOIL, ETC.

5.2.2 MANUFACTURERS SHALL AFFIX "CAUTION" LABELS TO THE EXTERNAL
SHIPPING CONTAINER, AND WHERE USED, TO ANY INTERMEDIATE CONTAINER.

SUGGESTED SOURCE(S) OF SUPPLY:

DALE ELECTRONICS, INC.

CAGE CODE 91637

COLUMBUS, NE 68601

MFR. PART NUMBER: SEE TABLE II

IDENTIFICATION OF THE SUGGESTED SOURCE(S) OF SUPPLY HEREON IS NOT TO BE
CONSTRUED AS A GUARANTEE OF PRESENT OR CONTINUED AVAILABILITY AS A
SOURCE OF SUPPLY FOR THE ITEM(S).

INCOMPLETE: ELECTRICAL TESTS (TABLE I) MISSING.

VTS: VENDOR TO SPECIFY

APPLICABLE DOCUMENT:

G502215

TABLE I. 100 PERCENT INSPECTION

+-------------------------------------+--------------------------------+
| REQUIRED TEST                       | REQUIREMENTS                   |
|                                     |                                |
| OR INSPECTION                       |                                |
+-------------------------------------+--------------------------------+
| VISUAL AND MECHANICAL               | SEE 3.2.1, 3.2.3, 3.2.5,       |
|                                     |                                |
|                                     | 3.2.6, 3.3.1,                  |
|                                     |                                |
|                                     | 3.3.2, 3.5 AND 3.6             |
+-------------------------------------+--------------------------------+
| ELECTRICALS                         | AT 25°C                        |
+-------------------------------------+--------------------------------+

TABLE II

+----------+-----------------+-----------+----------------+-----------+
| RAYTHEON | UNIT            | OUTLINE   | MGR. PART      | FIRMWARE  |
|          |                 |           | NUMBER         |           |
| PART     |                 | DRAWING   |                | REV (OR   |
|          |                 |           | \-\-\-\-\-\    |           |
| NUMBER   |                 |           | -\-\-\-\-\-\-\ | GREATER)  |
|          |                 |           | -\-\-\-\-\-\-\ |           |
|          |                 |           | -\-\-\-\-\-\-\ |           |
|          |                 |           | -\-\-\-\-\-\-- |           |
|          |                 |           |                |           |
|          |                 |           | DALE ELECT.    |           |
+==========+=================+===========+================+===========+
| G        | RIBBON DISPLAY  | FIGURE 1  | APD-250M060    | 1.4       |
| 432302-1 |                 |           |                |           |
+----------+-----------------+-----------+----------------+-----------+
| G        | AUDIBLE ALARM   | FIGURE 2  | PDS-85         | NA        |
| 432302-2 | BOX             |           |                |           |
+----------+-----------------+-----------+----------------+-----------+
| G        | RIBBON DISPLAY  | FIGURE 1A | APD-250M045    | 1.4       |
| 432302-3 |                 |           |                |           |
+----------+-----------------+-----------+----------------+-----------+

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