M7/M7L/M7LT Modular Satellite Modem Maintenance
M7/M7L/M7LT - Rev. 0.05 3-43
0 = 1/2, 1 = 3/4, 2 = 5/6
3 = 7/8.
0 = 2/3 in 8PSK TCM
(Vit) Sets the code rate of the
Viterbi FEC encoder.
0 = Disabled,
1 = IESS-308
2 = IESS-309
3 = CT 200-220
5 = Custom
(Vit + R-S) Reed-Solomon
column and options only
available if enabled. Entry is not
shown when TPC enabled.
In Custom Mode only:
Available n values
Read only in other modes
(Vit + R-S) Block size
n = 22 to 255
In Custom Mode only:
Available k values
Read only in other modes
(Vit + R-S) k = 20 to 253,
k must be 2 to 20 less than n
In Custom Mode only:
0 = 4, 1 = 8, 2 = 16
Read only in other modes
(Vit + R-S) Interleave depth
factor
(Vit + R-S) Differential Encoder
Not shown or settable except in
special modes.
0 = Disable,
1 = Auto
2 = V.35,
3 = Intelsat,
4 = EFD,
5 = Alt V.35
6 = Alt Intelsat
7 = Alt RS EFD**
8 = RS Sync**
(Vit + R-S) Scrambler types.
Types are added if optional
hardware is installed. The Auto
mode uses IESS standards to
automatically switch to use
synchronous scramblers part of
R-S and TPC.
** only when R-S = Enabled
(TPC) Sets the compatibility
mode for the TPC FEC encoder
Data FEC Code Rate
3/4-4k
0 = 0.452-16k,
1 = 1/2-16k, 2 = 1/2-4k
3 = 3/4-16k, 4 = 3/4-4k
5 = 7/8-16k, 6 = 7/8-4k
7 = 0.922-16k,
8 = 0.950-4k
(TPC) Sets the code rate of the
TPC FEC encoder.
0 = Disable,
1 = Auto
2 = V.35,
3 = Intelsat,
4 = EFD,
5 = Alt V.35
6 = Alt Intelsat
7 = FEC Sync
8 = FEC Sync
(TPC) Scrambler types. Types
are added or removed
depending on the selected FEC
mode. The Auto mode uses
IESS standards to automatically
switch to use synchronous
scramblers part of R-S and TPC.
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