Comtech EF Data SLM-5650A - Manual (Page 93)

SLM-5650A Satellite Modem Revision 8
Front Panel Operation MN-SLM5650A
5–11
CONFIG: Tx  Overhead
Tx: Overhead:None Rate: N/A
RS-CW:N/A Depth:N/A (E)
First, use the  arrow keys to select Overhead, Rate, RS-CW, and Depth, and then press
[ENT]. Then, 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 or AUPC); N/A (None).
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.
CONFIG: Tx  Frequency
Tx Frequency: 1955.0000 MHz
Spectrum: Normal (E)
First, use the  arrow keys to select Tx Frequency or Spectrum, and then press [ENT].
Use Method 1 or Method 2 to enter the desired Tx Frequency:
Method Procedure
1 Use the number keypad and enter the desired frequency. Press [ENT] when done.
2
Select the digit to be edited using thearrow keys, and then change the value of that digit by
using the  arrow keys. Press [ENT] when done. Note the following:
For 70/140 MHz: Valid range is 52
– 88, 104 – 176 MHz (in 100 Hz steps).
For L-Band: Valid range is 950 – 2000 MHz (in 100 Hz steps).
When entering an IF frequency, the M&C will check the occupied bandwidth
calculated from the data rate, modulation type, code rate and overhead and will
not allow an IF frequency to be entered if the occupied bandwidth falls outside of
the minimum or maximum IF frequencies.
Select Spectrum to counteract frequency converters that invert the spectrum. Use the  arrow
keys to select Normal or Invert, and then press [ENT] when done.