Comtech EF Data SLM-5650B Installation And Operation Manual page 105

This sets an Eb/No threshold such that, when the received carrier Eb/No is less than
the set value, the Rx threshold alarm is set. The valid range is 0.1–20 dB (in 0.1 dB
steps). Press [ENT] when done.
CONFIG: Rx  CnC
This feature is a future option and not available at this time.
CONFIG: Rx  Spreading
Rx Spreading: Factor:0001 Polyn:0 GSN:0000
Use the  arrow keys to select Factor or Polyn, and then press [ENT].
Use the  arrow keys to select GSN, and then press [ENT].
Use Method 1 or Method 2 to configure these options:
Method
1
2
Note the following:
Option
Factor
Polyn
GSN
Front Panel Operation
You must first go to the (CONFIG
type as LDPC in order to select this menu.
ChipRate: 000065.881kcps
Procedure
Key in the desired value using the numbered keypad. Press [ENT] when done
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.
Settings
Rx Spreading Factor, which is settable from 1 to 512 in integer steps.
Select 0 or 1.
Select 0 to 9999.
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MODE submenu and set the modem
(E)
5–21
SLM-5650B Satellite Modem
Revision 2
MN-SLM-5650B