Comtech EF Data SDM-650B User Manual
Page 30
Introduction
SDM-650B Satellite Modem
1–6
Rev. 5
Additional Demodulator Specifications
Input Power:
Desired Carrier
Composite
-30 to -55 dBm.
+30 dB power within 20 MHz from desired carrier.
+40 dB power outside of 20 MHz from desired
carrier.
0 dBm maximum composite.
Input Impedance
75
Ω
.
Input Return Loss
20 dB.
Carrier Acquisition Range
±
25 kHz minimum.
Clock Acquisition Range
±
100 PPM.
Remote Control Specifications
Serial Interface
RS-232-C, or RS-485.
Baud Rate
300 to 9600 bit/s.
Signals Controlled/Monitored
Transmit Frequency.
Receive Frequency
Transmit Power.
Transmitter ON/OFF.
Data Rate Select.
RF Loopback.
IF Loopback.
Data Loopback.
Scrambler ON/OFF.
Descrambler ON/OFF.
Raw Error Rate.
Corrected BER.
Receive E
b
/N
0
.
TX Clock Internal/External.
RX Clock Normal/Invert.
Receive Signal Level.
Receive Carrier Detect.
Power Supply Voltages.
Stored Fault Status.
Configuration Retention
Will maintain current configuration for 30 days
minimum without power.
Addressing
Programmable to 1 of 255 possibilities. Address 0
reserved for global addressing.
Local control of all remote functions included via push-button entry.