PTR50‘CW’ Tracking Receiver

The PTR50 is a next generation beacon tracking receiver, designed specifically to track and measure CW beaconsfrom commercial satellites. Primarily an L-Band input receiver, the unit can be provided with a range of optional
SHF input modules.
The PTR50 is designed to be used for telemetry and control, typically in earth stations using large antennae.
Outdoor compact versions with fast acquisition as standard are also available for smaller antenna & SOTM /mobileapplications (see RTR50).
For satellites without beacon signals (or beacon signals that are modulated), Peak can provide a CW pilot
generator option which is applied to the uplink signal (after UPC compensation) and subsequently received on thedownlink instead of the normal satellite beacon signal.
The receiver is designed as a versatile and easy-to-use unit utilising a graphic display module that can display adigital representation of the received beacon spectrum. This feature provides a convenient visual display of thereceived signal which can be used for system fault location, routine maintenance and can be an effective
alternative to a fully functional spectrum analyser, which may not be necessary for these tasks.
The tracking band center frequency can be set accurately using the 1kHz step size synthesiser system. The unit
uses a 300Hz /2kHz phase locked loop (PLL) system to perform signal acquisition and level measurement throughcoherent detection. The search facility sweeps the frequency to locate a signal in the acquisition band and if asignal is detected the frequency is locked immediately to this beacon. A secondary search is then initiated to look
for a more intense signal within the search band. If one is detected then the locked tracking frequency is modified.
The process repeats until the largest signal is found in the search band and the anti-sideband device is thendisabled.
A log amplifier is used to provide an output voltage representing the input power in logarithmic scale, in effectmaking the input power to output voltage log-conformal. The sensitivity of the logarithmic output is user selectablefrom the front keypad menu.
The PTR50 unit achieves lock acquisition times of typically 6s, for combinations of lower search ranges (searchbandwidths) and higher sweep rate settings. It is also offered with a fast signal acquisition option achieving lock
times of typically 1s, for combinations of lower search ranges (search bandwidths) and higher sweep rate settings.
For redundancy the PTR series units are fully compatible with the Peak B1000L (1+1) system.

Peak Features
Graphical display of beacon signal
Fast signal acquisition and locking (6s typical, optionally <1s)
Pilot ‘CW’ signal generation option for ‘self-test’ & use when no satellite CW beacon is present
Sophisticated sideband rejection system
Standard L-Band or SHF input options
Logarithmic output range, user selectable

PTR50 – Typical Specification
L-Band Input
Option 12;
Frequency range

Dual polarisation inputs, with local & remote userselection
925-2,150MHz

Note; wider ranges to 2450MHz available (please contact factory).

Connector
Option 4;
Option 4b;
Option 4c;
Input return loss
Beacon input level
Aggregate input level
User input level control;N-type (f), 50Ω
F-Type (f), 75Ω
BNC (f), 75Ω
BNC (f), 50Ω
15dB typical-70dBm nom., -50dBm max.
-20dBm max.
0-30dB range, 0.5dB step attenuator, to increase
the above composite L-Band input levels.

L-Band Monitor for SHF inputs (option 2)
Connection
Level

Pilot ‘CW’ Generator Output (option 14)
For ‘self-test’ & for use when satellite has no useable beacon signal
Frequency range
850-2,150MHz, user settable
Step size
125kHzLevel-50 to -80dBm
Control range
30dB, stepped 0.5dB
Connector
SMA (f), 50Ω

Internal Reference
Frequency
Adjustment

C-Band; 3.4-4.2GHz
X-Band; 7.25-7.75GHz
Full Ku-Band; 10.7-12.75GHz (unreferenced LNB)
Ka-Band (consult factory for band availability).
-90dBm nom., -70dBm max.
-40dBm max.
0-30dB range, 0.5dB step attenuator, to increase
the above composite SHF input levels.

DC Output
Voltage range
Slope settings
Connector
Impedance
Adjustment range±10VDC, ±5VDC, 0 to 10VDC, -10 to 0VDC, user
selectable
Logarithmic, 0.5, 1, 2, 5 & 10dB/V, user settable
BNC (f)0Ω (ideal voltage source, maximum current 5mA)
Output adjustable to 0V for input level between -60& -100dBm

Auxiliary Buffered DC Output (option 13)
BNC (f), 0Ω (ideal voltage source, 5mA max)Connector

Transfer Characteristics
Post-detection time const.
Step size
Search range
Sweep rate
Option 11;
Level thermal stability

150mS
1kHz
±20, ±50, ±100, ±200 & ±500kHz, user selectable
2.5 & 5kHz/s, user selectable
2.5, 5, 10, 20, 40, 80, 120 & 240kHz/s-0.04dB/0C

Allan deviation
AgeingTemp stability

Option 11;

300Hz, fixed
2kHz, fixed
35dBHz, for sweep rates ≤10kHz/s
6s, for search range ±20kHz and sweep rate
5kHz/s (see application note AN0025)<1s, for search ranges of ≤±50kHz and sweep
rates ≥80kHz/s

Video Section Display (Beacon frequency ±25MHz max.)
Resolution bandwidth
Display

6kHz
GraphicalBlock Down Converter/ LNB Drive
Fed on L-Band input, user selectable (on/off);
Range select;
DC voltage level (13-15/ 18-20VDC)Power;
500mA max. (300mA per output for option 12)<5 x 10-12 over 1s<3 x 10-10 per day, <3 x 10-8 per year
<2 x 10-9 over -10 to 500C

Mechanical
Width
HeightDepth
Construction
Weight19”, standard rack mount1U (1.75”)
534mm (21”), plus connectors
Stainless steel chassis
Approx. 8kg (18lbs)

Environmental
Operating temp
EMC
Safety00 to +500C
ETSI EN 301 489-1: V2.2.1& ETSI EN 300 673: V1.2.1
IEC/EN 62368-1:2014 (second edition)

Power Supply
VoltageFrequency
PowerOption 10;

90-264VAC
47-63Hz
50 Watts max (configuration dependant)
Redundant PSU’s with separate prime power
inputsControl System
Remote control
Option 9;
AlarmsTracking Parameters
PLL noise (IF) bandwidth
Option 11;
Threshold lock reacqu.
Average search time10MHz±0.45ppm, stepped 0.01ppm

Stability

SHF-Band Input (option 1)
Input frequency options;
Option 1a;
Option 1b;
Option 1d;
Option 1e;
Beacon input level
Aggregate input level
Option 16;

BNC (f), 50Ω-20dBc ±3dB

RS232/RS485 port
Ethernet; embedded web server & SNMP network
management support
LO lock failure
PSU failure
External alarm inputs
Summary failure relay (form C)
Out of lock alarm (form C)

Options
1a)
1b)
1d)
1e)
2)
4)
4b)
4c)
9)
10)
11)
12)
13)
14)
16)

C-Band beacon input.
X-Band beacon input.
Full Ku-Band beacon input.
Ka-Band beacon input.
L-Band monitor (for SHF input options).
F-Type, 75Ω, input connection
BNC, 75Ω, input connection
BNC, 50Ω, input connection
Ethernet interface with embedded web server & SNMP
Redundant power supplies
Fast lock acquisition to <1s
Dual polarisation inputs
Auxiliary buffered receiver DC output
Pilot ‘CW’ signal output
SHF input level control (only valid with option 1)

Note; the addition of options can modify the typical performance,for details please consult the factory

Rear panel view (sample)

Peak Communications reserves the right to alter the specifications of this equipment without prior notice. PTR50-021222.
Peak Communications Ltd., Unit 1, The Woodvale Centre, Woodvale Road, Brighouse, West Yorkshire, HD6 4AB, U.K.
Tel; +44 (0)1484 714200 Sales; +44 (0)1484 714229 Fax; +44 (0)1484 723666 Email; sales@peakcom.co.uk Web; www.peakcom.co.uk