Comtech EF Data CDM-625, Инструкция по установке и эксплуатации

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CDM-625 Advanced Satellite Modem Revision 1
Front Panel Operation MN-0000036 (Ref MN/CDM625.IOM)
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 (None, Tx-Alm)
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
Æ
FEC
Encoder=Vit (None,Vit,TCM,TPC,LDPC)
Reed-Solomon=On (Off,On) (
34v
)
Select the parameter to edit using the
◄ ►
arrow keys. The Encoder options are shown in the
parentheses. Select using the
▲ ▼
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)
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) (
34v
)
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