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SLM-5650 Satellite Modem
Front Panel Operation
Note: Framing is applicable only when using externally framed data, with the following
formats:
Select: CONFIG: Receive: Demod
Demod: FEC:VIT
RS:N/A
Select the Demod, Type, RS, Diff, and Descram. Use the
through all the choices. The user should then press [E].
FEC
Type
(Modulation)
Rate
RS
Diff
Descram:
V.35
M-V.35
IBS
Turbo
OM73
Synch
IMPORTANT
T1 or E1 G.704
T2 G.743, G.704, G.707
E2 G.742, G.704, G.745
Type:BPSK
Diff:On
Descram:OM-73
(Viterbi or None are standard), (TURBO optional) Viterbi is a K=7
convolutional decoder. None means Uncoded. Turbo means Turbo Product
Code, which is a block code. Trellis operation is supported in IESS-310 or MIL-
STD-188-165A mode which a different front end is applied the Viterbi decoder.
Trellis is not a displayed choice.
(BPSK, QPSK, OQPSK standard), (8PSK, or 16QAM optional) BPSK stands
for Bi Phase Shift Keying. QPSK stands for Quadrature Phase Shift Keying.
OQPSK stands for Offset Quadrature Phase Shift Keying. 8-PSK stands for
8 Phase Shift Keying. 16-QAM stands for 16 Quadrature Amplitude Modulation.
Viterbi: 1/2, 2/3, 3/4, 5/6, or 7/8
Uncoded: 1/1
Turbo: 5/16, 21/44, 3/4, 7/8, or 17/18
On or Off (Reed Solomon Decoder)
On or Off (Differential Decoder)
V.35, M-V.35, IBS, TURBO, OM73, Synch, or Off
ITU standard
EF Data Closed Network with Reed Solomon compatible (modified V.35)
Used for IESS-309 operation
Synchronous descrambler synchronized to the Turbo block
OM-73 Linkabit modem compatibility mode
Synchronous descrambler synchronized to the Reed-Solomon frame.
When changing Modulation type the data rate must be set to a rate
supported by the modulation type or the change to the modulation type
will not be allowed. Some choices will only be visible if the modem is
set to a compatible mode or if an option is installed or enabled.
Rate:3/4
4–12
Revision 2
MN/SLM5650.IOM
(
E)
arrow keys to scroll
(Descrambling)
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