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CDM-625 Advanced Satellite Modem
Front Panel Operation
Selecting Target-EbNo-Range displays the following menu:
Minimum EbNo of Remote Modem = 5.0dB
Max Permitted Power Increase = 9dB (34v)
Edit the Target Eb/No of the remote modem. The default value is 3.0 dB; the upper limit is 14.9
dB. Edit the maximum permitted increase in power level when in AUPC mode. The default value
is 1dB' the upper limit is 9 dB. The user should then press ENTER.
Selecting Alarm-Action displays the following menu:
Max Tx Pwr Action= None
Rem Demod Unlock Act= Nom-Pwr (Nom,Max)
Select the action that will occur if the AUPC causes the maximum output power level to be
reached: either None or Tx Alarm.
Select the action that will occur if the remote demod is unlocked. The choices are:
•
Nom-Pwr (Nominal Power), where the output level will revert to the nominal power
level set under Manual, or
•
Max-Pwr (Maximum Power), where the output level will change to the maximum
permitted. The user should then press ENTER.
5.4.3.4
CONFIG: Tx
Encoder=Vit (None,Vit,TCM,TPC,LDPC)
Reed-Solomon=On (Off,On)
Select the parameter to edit using the
parentheses. Select using the
•
•
•
•
•
Note: The options of TPC (Turbo) and LDPC encoding are only displayed if a TPC/LDPC Codec
is installed.
If None is selected for the Encoder setting, the bottom line of the display will change from the
Reed-Solomon selection to a Differential Encoding selection, as shown:
Encoder=None (None,Vit,TCM,TPC,LDPC)
Diff Encoder=On (Off,On)
FEC
◄ ►
arrow keys, then press ENTER. The choices are:
▲ ▼
Viterbi
Trellis Coded Modulation (TCM) - 8-PSK Rate 2/3 only (FAST option)
TPC (Turbo) (Hardware option)
LDPC (Hardware option)
None (i.e., uncoded)
MN-0000036 (Ref MN/CDM625.IOM)
(None, Tx-Alm)
arrow keys. The Encoder options are shown in the
5–12
Revision 1
(34v)
(34v)
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