Comtech EF Data SLM-5650B, Installation And Operation Manual

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SLM-5650B Satellite Modem
Revision 2
Front Panel Operation 5–12 MN-SLM-5650B
CONFIG: Tx

DataRate
Tx Data Rate: 020000.000 kbps
Sym Rate: 0266666.666 ksps(

E)
Use Method 1 or Method 2 to enter the desired Tx Data Rate (in kilobits per second):
Method Procedure
1 Use the number keypad and enter the desired data rate.
(See Appendix B. OPERATIONS GUIDE.)
2 Use the

arrow keys to scroll through and select the desired data rate or symbol
rate. When scrolling through the data rates the symbol rate is automatically recalculated
and displayed.
When entering the data rate, the following interactions need to be
taken into account:
If the modulation type selected is 8PSK, 8QAM, or 16QAM the
minimum data rate allowed is 256 kbps.
When changing certain parameters like modem type, the data rate
will default to 64 kbps or 256 kbps.
The calculated symbol rate is displayed for the user. This is
helpful for determining the occupied bandwidth required for the
selected modulation type, code rate and overhead.
CONFIG: Tx

Overhead
Tx: Overhead:None Rate: N/A
RS-CW:N/A Depth:N/A (

E)
Use the

arrow keys to select Overhead , Rate , RS-CW , and Depth , and then press
[ENT] .
Use the

arrow keys to scroll through the available settings. Press [ENT] once again
when done.
Option Setting
Overhead IESS-308, IESS-309 are standard. AUPC is optional.
Rate 96 kbps (IESS-308); 1/15 (IESS-309); N/A (None), 1/15 (AUPC).
RS-CW
Reed-Solomon Code Word, N/K: 126/112, 194/178, 208/192, 219/201, 220/200,
225/205.
Depth Interleaving depth: 4, 8 or 16.
Some selections will only be visible if the modem is set to a compatible mode, or
if an option is installed or enabled.