Comtech EF Data SLM-5650A Installation And Operation Manual page 117

(CONFIG:) Tx  DataRate
Tx Data Rate:
Sym Rate:
Use Method 1 or Method 2 to enter the desired Tx Data Rate (in kilobits per second):
Method
1 Use the number keypad and enter the desired data rate. Press [ENT].
(See Appendix B. OPERATIONAL REFERENCES.)
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. Press
[ENT].
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
RS-CW:N/A
Use the  arrow keys to select Overhead, Rate, RS-CW, and Depth. Press [ENT]. Use the
 arrow keys to scroll through the available settings. Select your setting. Press [ENT] to finish.
Option
Standard settings: IESS-308; IESS-309
Overhead
Optional setting: AUPC
96 kbps (IESS-308); 1/15 (IESS-309 or AUPC); N/A (None).
Rate
Reed-Solomon Code Word, N/K:
RS-CW
126/112; 194/178; 208/192; 219/201; 220/200; 225/205.
Interleaving depth:
Depth
4; 8; 16.
Some selections will only be visible if the modem is set to a compatible mode, or if an option is
installed or enabled.
Front Panel Operation
020000.000 kbps
0266666.666 ksps(E)
Rate: N/A
Depth:N/A (E)
See Appendix J. OVERHEAD AND SYMBOL RATE CALCULATIONS for Overhead rate
information.
7–11
SLM-5650A Satellite Modem
Procedure
Setting
Revision 10
MN-SLM-5650A