Specifications

SDM-300L3 Satellite Modem Revision 0
Open Network Operations MN/SDM300L3.IOM
10–17
10.4.3 D&I Modem Defaults
Table 10-3
. D&I Modem Faults
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 Demodulator Type 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 1 mS
Buffer Clock Source Insert Frame Structure T1 Data G.704
TX Clock Phase Auto Frame Structure E1 Data G.704
RX Clock Phase Normal Frame Structure T2 Data G.743
External Reference Freq. 1544 kHz Frame Structure E2 Data G.742
Baseband Loopback OFF Loop Timing OFF
Interface Loopback OFF TX Overhead Type D&I
TX Coding Format AMI RX Overhead Type D&I
RX Coding Format AMI TX Terr Interface G.703
TX 2047 OFF RX Terr Interface G.703
RX 2047 OFF
IBS Scrambler ON IBS Descrambler ON
Drop Data Format T1 Insert Data Format T
TX Data/AIS Fault NONE
RX Data/AIS Fault NONE TX Data Phase Normal
Buffer Programming MS RX Data Phase Normal
Note: When selecting E1_CAS or E1_CCS D&I data format, the defaults in the D&I data
channels are offset by 1 from 16 and up. When programming from E1_CAS or E1_CCS to any
other format, the D&I channels are defaulted to straight through.