Comtech EF Data SLM-5650A Installation And Operation Manual page 96

SLM-5650A Satellite Modem
Front Panel Operation
5.2.3.2 CONFIG: Rx
Rx: Demod DataRate Overhead Frequency
Acq Buffer Misc CnC Spreading
Use the arrow keys to select Demod, DataRate, Overhead, Frequency, Acquisition,
Buffer, Misc, CnC, or Spreading and then press [ENT]:
Submenu
Demod
DataRate
Overhead
Frequency
Acquisition
Buffer
Misc
CnC
Spreading
Note: Framing is applicable only when using externally framed data, with the following formats:
T1 or E1 G.704; T2 G.743, G.704, G.707; and E2 G.742, G.704, G.745.
CONFIG: Rx
Demod: FEC:VIT
RS:N/A
First, use the arrow keys to select FEC, Type, Rate, RS, Diff, or Descram, and then press
[ENT]. Then, for any option, use the  arrow keys to scroll through the available settings.
Press [ENT] once again when done.
Option
FEC
Option
Select FEC, Type, Rate, RS, Diff, or Descrambler.
Enter a selected data rate (see Appendix B. OPERATIONS GUIDE).
Select the overhead type, view the overhead rate, select the Reed-Solomon Code Word, and
depth.
Select desired frequency and spectral inversion.
Select acquisition range and reacquisition time period.
Select buffer reference clock source, recenter, the buffer size, Bit mode or millisecond mode
and external Framing for Plesiochronous operation.
Select Clk and Data Phase, BPSK Bit Ordering, and Eb/No Threshold.
Select Mode, Acquisition, or SearchDelay.
Select the Rx spreading factor and equation. View the Rx Chip Rate. This menu is selectable
only if the modem type has been set to LDPC.
Demod

Type:BPSK
Diff:On Descram:OM-73
Settings
VIT or NONE are standard; the remainder are optional.
Note the following:
• VIT (Viterbi) – K=7 convolutional encoder.
• NONE – Uncoded.
• TURBO – Turbo Product Code, which is a block code.
• SEQ – Sequential Encoder/Decoder.
• ULL – Ultra Low Latency LDPC
• LL – Low Latency LDPC
• HP – High Performance LDPC
(E)
Rate:3/4
5–14
Revision 8
MN-SLM5650A
(E)