Select: Config: Transmit - Comtech EF Data SLM-5650 Installation And Operation Manual

SLM-5650 Satellite Modem
Front Panel Operation
4.3.1.1

Select: CONFIG: Transmit

Tx: Mod DataRate Overhead Frequency
Mod
DataRate
Overhead
Frequency
Power
Clocking
Misc
Select: CONFIG: Transmit: Mod
Mod: FEC:VIT
RS:Off
Select the Mod type using the
follows. The user should then press [E].
FEC
Type
(Modulation)
Rate
RS
Diff
Scram:
V.35
M-V.35
IBS
Turbo
OM73
Synch
Power Clocking Misc
Permits the user to select: FEC, Type, Rate, RS, Diff, and Scrambler.
Permits the user to enter a selected data rate and view the symbol rate.
(See Chapter 3.)
Permits the user to select the overhead type, view the overhead rate, select the
Reed Solomon Code Word, and depth.
Permits the user to select the desired frequency and spectral inversion.
Permits the user to select desired output power level and state of the output.
Permits the user to select the transmit clock source and SCT reference.
Permits the user to select CLK/DataPhase and BPSK Bit Ordering.
Type:QPSK
Diff:On Scram:OM-73
(Viterbi or None are standard), (TURBO optional) Viterbi is a K=7
convolutional encoder. None means Uncoded. Turbo means Turbo Product
Code, which is a block code. Trellis operation is supported in IESS-310 mode
and MIL-STD-188-165A mode, which for the encoder is just a specific mapping
of the constellation. 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. 8PSK stands for
8 Phase Shift Keying. 16QAM 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 Encoder)
On or Off (Differential Encoder)
V.35, M-V.35, IBS, TURBO, OM73, Synch, or Off
(Scrambling is for energy dispersal)
ITU standard
EF Data Closed Network with Reed Solomon compatible (modified V.35)
Used for IESS-309 and AUPC operation
Synchronous scrambler synchronized to the Turbo block
Linkabit OM-73 modem compatibility mode
Synchronous scrambler synchronized to the Reed-Solomon.
(
Rate:1/2
(
arrow keys to scroll through all the choices, as
4–8
Revision 2
MN/SLM5650.IOM
E)
E)