SLM-3650 Satellite Modem
Revision 3
Options
MN/SLM3650.IOM
A–55
A.1.7.2
IBS Modem Defaults
Refer to Table A-18 for IBS modem defaults.
Table A-18. 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
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
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
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