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CDM-600L Satellite Modem
Summary of Specifications
BUC Reference (10
MHz):
Phase Noise
Output Phase
Noise
Output Power
Power Accuracy
Output Connector
Clocking Options
External TX
Carrier Off
BUC Supply
Voltage
Suppplied through
Tx IF center
conductor and
selectable ON/OFF
via M&C control.
BUC Current
Monitor
Tx Carrier ON
Delay
BUC Monitoring
(FSK ON)
BUC Power
Leveling (FSK ON)
On center conductor of L-Band output connector; 10.0 MHz ± 0.02 ppm (Optional 1ppm)
0.0 dBm, ± 3 dBm; programmable ON/OFF
Source: 1. Internal Modem Reference
2. External Reference (10 MHz)
dB/Hz
Frequency Offset
-80
1 Hz
-110
10 Hz
-135
100 Hz
-140
1 kHz
-150
10 kHz
-150
100 kHz
dB/Hz
Frequency Offset
-63.0
100 Hz
-73.0
1 kHz
-83.0
10 kHz
-93.0
100 kHz
Fundamental AC line spurious is -42 dBc or lower
The sum of all other single sideband spurious, from 0 to 0.75 x symbol rate, is -48 dBc or lower
0 to -40 dBm, 0.1 dB steps - manual mode. See Automatic Uplink Power Control section also.
±1.5 dB over frequency and temperature
Type N female
Internal, ±1ppm or 0.02 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.
By TTL 'low' signal or external contact closure - hardware function automatically over-rides
processor
Standard unit has no BUC supply.
Optional BUC Supply
•
24VDC, 4.0 Amps maximum, 100W
•
48VDC, 3.75Amps maximum, 180W
Min/Max programmable current alarm thresholds.
Delay from power on to Tx IF output allowing BUC to warm up. Programmable 0 to 200 sec.
Power level, temperature, power class, PLL lock.
Modem levels BUC output power by increasing or decreasing carrier output to match
programmed target level.
15–3
Revision 2
MN/CDM600L.IOM
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