Comtech EF Data SLM-5650B, Инструкция по установке и эксплуатации

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SLM-5650B Satellite Modem
Revision 2
Front Panel Operation 5–16 MN-SLM-5650B
5.2.3.2 CONFIG: Rx
Rx: Demod DataRate Overhead Frequency
Acq Buffer Misc CnC Spreading (

E)
Use the

arrow keys to select Demod , DataRate , Overhead , Frequency , Acq , Buffer ,
Misc , CnC , or Spreading, and then press [ENT] :
Submenu Option
Demod Select FEC, Type, Rate, RS, Diff, or Descrambler.
DataRate Enter a selected data rate (see Appendix B. OPERATIONS GUIDE).
Overhead
Select the overhead type, view the overhead rate, select the Reed-Solomon Code Word, and
depth.
Frequency Select desired frequency and spectral inversion.
Acq
Select the acquisition range.
Buffer
Select buffer reference clock source, recenter, the buffer size, Bit mode or millisecond mode
and external Framing for Plesiochronous operation.
Misc Select Clk and Data Phase, BPSK Bit Ordering, and Eb/No Threshold.
CnC This feature is a future option and not available at this time.
Spreading Select the Rx spreading factor, polynomial, and GSN. View the Rx Chip Rate. This menu is
selectable only if the modem type has been set to LDPC.
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
Demod: FEC:VIT Type:BPSK Rate:3/4
RS:N/A Diff:On Descram:OM-73 (

E)
Use the

arrow keys to select FEC, Type, Rate, RS, Diff, or Descram , and then press
[ENT] .
Use the

arrow keys to scroll through the available settings. Press [ENT] once again
when done.
Option Settings
FEC VIT, NONE, and TURBO 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
Type
BPSK, QPSK, or OQPSK are standard; 8PSK, 8QAM, or 16QAM are optional. Note