Comtech EF Data SDM-300A - Manual (Page 261)

SDM-300A Satellite Modem Revision 6
Open Network Operations MN/SDM300A.IOM
10–5
10.2.2 IBS Modem Defaults
Table 10-2. IBS Modem Defaults
Modulator Demodulator
Data Rate A Data Rate A
TX Rate A 64 kbps, QPSK 1/2 RX Rate A 64 kbps, QPSK 1/2
TX Rate B 256 kbps, QPSK 1/2 RX Rate B 256 kbps, QPSK 1/2
TX Rate C 768 kbps, QPSK 1/2 RX Rate C 768 kbps, QPSK 1/2
TX Rate D 2048 kbps, QPSK 1/2 RX Rate D 2048 kbps, QPSK 1/2
TX Rate V 128 kbps, QPSK 1/2 RX Rate V 128 kbps, QPSK 1/2
IF Frequency 70 MHz IF Frequency 70 MHz
IF Output OFF Decoder Type Viterbi
Mod Power Offset 0 dB Differential Decoder ON
Power Output -10 dBm (see Note) Demodulator Type Intelsat Open Net
Differential Encoder ON IF Loopback OFF
Modulator Type Intelsat Open Net RF Loopback OFF
Encoder Type Viterbi Sweep Center Freq. 0 Hz
CW Mode Normal (OFF) Sweep Range 60000 Hz
Mod Power Fixed 0 dB Sweep Reacquisition 0 seconds
Mod Spectrum Normal BER Threshold NONE
Demod Spectrum Normal
Interface
TX Clock Source TX Terrestrial Buffer Size 384
Buffer Clock Source Receive Satellite IBS Scrambler ON
TX Clock Phase Auto IBS Descrambler ON
RX Clock Phase Normal Frame Structure T1 Data G.704
External Reference Freq. 1544 kHz Frame Structure E1 Data G.704
Baseband Loopback OFF Frame Structure T2 Data G.743
Interface Loopback OFF Frame Structure E2 Data G.742
TX Coding Format AMI Loop Timing OFF
RX Coding Format AMI TX Overhead Type IBS
TX 2047 OFF RX Overhead Type IBS
RX 2047 OFF TX Terr Interface G.703
TX Data/AIS Fault NONE RX Terr Interface G.703
RX Data/AIS Fault NONE TX Data Phase Normal
Buffer Programming Bits RX Data Phase Normal