Comtech EF Data CDM-Qx, Инструкция по установке и эксплуатации

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CDM-Qx Satellite Modem Revision 6
Summary of Specifications MN/CDMQx.IOM
Power accuracy ±1.0 dB over frequency, temperature, and number of modulators installed in the chassis
Output Connector Type BNC Female (70/140MHz IF)
Type N Female (L-Band)
Output Return Loss
≥
19 dB (70/140MHz IF)
≥
10 dB (L-Band)
Clocking Options Internal, ±1ppm or 0.06 ppm (SCT)
External, locking over a ±100 ppm range (TT)
Loop timing (Rx satellite clock) - supports asymmetric operation - Rx and Tx data rates do not
need to be identical
External Clock at transmit data rate.
External TX
Carrier Off By TTL 'low' signal or external contact closure - hardware function automatically over-rides
processor
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50
CDM-Qx Modulator
typically < -50 dB, and
guaranteed to be
< -45 dB at offsets
> 0.75 Rs
Comtech EF Data
CDM-Qx Transmit
Power Spectral Density,
referred to symbol rate
Symbol Rate, R s
Spectral
density,
dB
Intelsat
IESS 308/309
Limit
Intelsat
IESS 308/309
Limit
Figure A-1. Power Spectral Density Chart
A–2