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4 config: tx ( fec, Config: tx  power  mode  cnc-apc mode, 4 config: tx  fec – Comtech EF Data CDM-625 User Manual

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CDM-625 Advanced Satellite Modem

Revision 15

Front Panel Operation

MN-CDM625

5–15

Selection

Function

Nom-Pwr (Nominal Power)

The output level reverts to the nominal power level set under Manual.

Max-Pwr (Maximum Power)

The output level changes to the maximum permitted.

Press ENTER when done.

CONFIG: Tx Power Mode CnC-APC Mode

Chapter 10. Double Talk Carrier-in-Carrier Option

Selecting CnC Automatic Power Control (CnC-APC) mode displays the following menu:

Output Power Mode = CnC-Auto-Power-Control

Level=-25.0dBm MaxPwrIncrease=2.5dB ()

On the bottom line – To edit the power output level and the maximum permitted increase in

power level when in APC Mode, use the

◄ ►

arrow keys to select a digit to edit, and then use

the

▲▼

arrow keys to change that digit. Press ENTER when done.

Note that, when APC is in an active state, the power level values display in the bottom left as

‘AUTO’.

5.2.1.3.4 CONFIG: Tx FEC

Enc=Vit (Vit,Seq,TCM,TPC,LDPC,VFEC,ULL)

Reed-Solomon=On (Off, On) ()

Use the

◄ ►

arrow keys to select Encoder or Reed-Solomon / Diff Encoder, and then press

ENTER.

On the top line – Use the

▲▼

arrow keys to select an available Encoder option (shown in

parentheses), and then press ENTER. The choices are:

► None (i.e., uncoded)

► Vit (Viterbi)

► Seq (Sequential)

► TCM (Trellis Coded Modulation)

8-PSK Rate 2/3 only (FAST option)

► TPC (Turbo)

(Hardware option)

► LDPC (Low Density Parity

Check) (Hardware option)

► VFEC

(VersaFEC Hardware option)

► ULL (Ultra-Low Latency)

(VersaFEC Hardware option)