Comtech EF Data Vipersat SLM-5650A, Installation And Operation Manual

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SLM-5650A Satellite Modem
Revision 10
Front Panel Operation 7–11 MN-SLM-5650A
(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. 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 Rate: N/A
RS-CW:N/A Depth:N/A (

E)
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 Setting
Overhead Standard settings: IESS-308; IESS-309
Optional setting: AUPC
Rate
96 kbps (IESS-308); 1/15 (IESS-309 or AUPC); N/A (None).
See Appendix J. OVERHEAD AND SYMBOL RATE CALCULATIONS for Overhead rate
information.
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; 16.
Some selections will only be visible if the modem is set to a compatible mode, or if an option is
installed or enabled.