Datum Systems PSM-500L Bedienungsanleitung Seite 31
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Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification
Rev. 0.86
A-31
Alarm, Monitor and Control Signals
All monitor and control functions are controllable via the front panel and the remote RS-232/RS-
485 serial control port.
During station setup and normal operation the modem can output either the AGC, receive Eb/No or
transmit power level to the rear panel via a digital to analog converter.
Alarm:
Summary:......................................................... Two summary form-C dry contact alarms, each
.......................................................... represents the OR'd condition of individually
.......................................................... programmed on-board fault sensors.
Indicator .......................................................... Front panel LED indicator.
Timing .......................................................... Alarm activated by any fault condition with 1/2
.......................................................... second hold before removal.
Monitor
AGC Level........................................................ Front Panel and via Remote Control port.
Carrier Lock .....................................................Green LED on internal PWB.
Demodulator Lock:........................................... Front panel LED indicator.
Transmit Bit Rate Synthesizer Fault: ............... Internal LED indicator.
Transmit RF Synthesizer Fault: ....................... Internal LED indicator.
Receive RF Synthesizer Fault: ........................ Internal LED indicator.
Eb/No:............................................... Front Panel and via Remote Control.
Operating LED indicators................................. 12 Front Panel LED indicators:
Unit
Power ............................................... Green - Lit when power applied
Summary Alarm................................ Red - if summary fault condition
Local................................................. Green - Unit set to accept local (front panel)
.......................................................... commands.
Remote............................................. Green - Unit set to accept remote commands.
Modulator
Transmit On...................................... Green - Lit when transmit output is on.
.......................................................... Green Flashing – Indicates carrier off, but
.......................................................... internal carrier on only for loop-back test.
Major Alarm ...................................... Red - Indicates transmit traffic is lost.
Minor Alarm ...................................... Yellow - Warning - Indicates a marginal
.......................................................... condition.
Test Mode ........................................ Yellow Flashing - Modulator currently in test
.......................................................... mode.
Demodulator
Lock.................................................. Green - Indicates RCV lock to incoming CXR.
Major Alarm ...................................... Red - Indicates receive traffic is lost.
Minor Alarm ...................................... Yellow - Warning - Indicates a marginal
.......................................................... condition.
Test Mode ........................................ Yellow Flashing - Demodulator currently in test
.......................................................... mode.
Control
All parameters are controllable from either the front panel or via the remote control interface.
Information and control access to the on-board processor is provided by an asynchronous serial
- SYSTEMS 1
- Modulator Specifications 5
- IF Output 5
- Transmit Synthesizer 5
- Transmit Baseband Processing 6
- Demodulator Specifications 7
- IF Input 7
- Receive Synthesizer 7
- Receive Baseband Processing 7
- Bit Error Rate Performance 9
- Viterbi BPSK/QPSK/OQPSK 10
- Viterbi 16QAM 11
- TCM 8PSK 12
- M5 Compatible TPC Modes 14
- TPC Advanced QPSK 15
- TPC Advanced 8PSK 16
- TPC Advanced 8QAM 17
- TPC Advanced 16QAM 18
- TPC-CT QPSK 19
- TPC-CT 8PSK 20
- TPC-CT 8QAM 21
- TPC-CT 16QAM 22
- Acquisition Performance 27
- Data Input 28
- Data Output 28
- Modem Bit Delays 28
- Modulator Transmit Delays 28
- Demodulator Receive Delays 29
- Monitor 31
- Control 31
- General Unit Specifications 32
- Mechanical 32
- Environmental 32
- Burst Mode Operation 32
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