PSM-500/500L/500LT SCPC Satellite Modem Operation
PSM-500/500L/500LT - Rev. 0.91
Modulator Parameter Detail
2.100000Mbps
Numeric 1.200 to 20,000.000 kbps
in 1 bps resolution. Entered
in kbps to 1bps increments.
Modulator Bit Rate – The max
and min are determined by
settings and options.
Viterbi
Selection 0 – None
1 = Viterbi,
2 = TCM (8PSK only)
3 = TPC Short
4 = TPC (Legacy)
5 = TPC (CT)
TPC Encoder - Only available
if installed. Reed-Solomon is
enabled below.
Legacy in Rate ¾, 7/8 only.
CT compatibility Rate ¾ only.
Normal
Selection 0 = Normal,
1 = Swap C0/C1,
FEC Optional Modes. May
change depending on FEC
options installed.
Rate 1/2
Selection 0 = ½, 1 = ¾, 2 = 5/6
3 = 7/8.
0 = 2/3 in 8PSK TCM
FEC Code Rate. The options
may change depending on
FEC installed and selected
IESS-308
Selection 0 = Disabled,
1 = IESS-308
2 = IESS-309
4 = IESS Custom
Reed-Solomon column and
options only available if not
disabled. Entry is not shown
when TPC enabled.
126
Numeric In Custom Mode only:
Available n values
Read only in other modes
Block size
n = 22 to 255
112
Numeric In Custom Mode only:
Available k values
Read only in other modes
k = 20 to 253,
k must be 2 to 20 less than n
4
Selection In Custom Mode only:
0 = 4, 1 = 8, 2 = 16
Read only in other modes
Interleave depth factor
Enabled
Not
Shown
0 = Disable, 1 = Enable Differential Encoder Not
shown or settable except in
special modes.
Auto
Selection 0 = Disable,
1 = Auto
2 = V.35,
3 = Intelsat, ,
4 = Alt V.35,
5 = Alt. Intelsat
6 = EFD
7 = TPC Sync
Scrambler types. Types are
added if optional hardware is
installed. The Auto mode
uses IESS 308 & 309
standards to automatically
switch to use synchronous
scramblers part of R-S and
TPC.
Internal
Selection 0 = Internal,
1 = TT Clock,
2 = External,
3 = RCV Clock
Transmit Data Clock Source.
Type 1, 2 or 3 will fall-back to
Internal if clock is not present
in these modes.
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