Premier Mounts CDM-600 specifications Config TX Encoder, TPC Turbo Hardware option

CDM-600 Satellite Modem	Revision 7
Front Panel Operation	MN/CDM600.IOM

If ALARM ACTION is selected, the following menu will be displayed:

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.

CONFIG: TX: ENCODER

ENCODER = TPC (NONE,VIT,SEQ,TCM,TPC,LDPC)

REED-SOLOMON= OFF (ON,OFF)

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

•Sequential

•Trellis Coded Modulation - 8-PSK Rate 2/3 only (FAST option)

•TPC (Turbo) (Hardware option)

•None (uncoded)

•LDPC (Hardware option) Note: This option of encoding is only displayed if the TPC/LDPC Codec is installed.

Select ON or OFF for Reed-Solomon using the [↑] [↓] arrow keys, then press ENTER. If Reed-Solomon is ON, proceed to the next menu.

If None is selected, the bottom line of the display will change from the R-S selection to the Differential Encoding selection, as shown below:

ENCODER = NONE (NONE,VIT,SEQ,TCM,TPC,LDPC)

DIFF-ENCODER= OFF (ON, OFF)

IMPORTANT

If the user selects Differential Encoding=OFF, there is no way for the modem to resolve the phase ambiguities associated with PSK modulations. For BPSK there is a 1 in 2 chance that the polarity of the data will be correct. IN QPSK there is a 1 in 4 chance the data will be correct.

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