Comtech EF Data SLM-5650B - CONFIG: Tx

SLM-5650B Satellite Modem
Revision 2
Front Panel Operation 5–10 MN-SLM-5650B
5.2.3.1 CONFIG: Tx
Tx: Mod DataRate Overhead Frequency
Power Clocking Misc Spreading (E)
Use the  arrow keys to select a Tx configuration submenu, and then press [ENT]:
Submenu
Option
Mod Select: FEC, Type, Rate, RS, Diff, and Scrambler.
DataRate
Enter a selected data rate and view the symbol 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 the desired frequency and spectral inversion.
Power
Select desired output power level and state of the output.
Clocking Select the transmit clock source and SCT reference.
Misc
Select CLK/DataPhase and BPSK Bit Ordering.
Spreading
Select the Tx spreading factor, polynomial, and GSN. View the Tx Chip Rate.
This menu
is selectable only if the modem type has been set to LDPC.
CONFIG: Tx  Mod
Mod: FEC:VIT Type:QPSK Rate:1/2
RS:Off Diff:On Scram:OM-73 (E)
Use the  arrow keys to select FEC, Type, Rate, RS, Diff, or Scram, and then press
[ENT].
Use the arrow keys to scroll through the available settings. Press [ENT] once again
when done.
Option
Setting
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