Comtech EF Data CDM-710G - Manual (Page 93)

CDM-710G High-Speed Satellite Modem Revision 1
Front Panel Operation MN-CDM710G
6–17
If TX Power Æ Imped(ance) is selected (this menu selection is available/displayed only when
the 70/140 MHz Modulator card is installed):
TX Impedance (Ohms):
50 75 ( E)
Note the following:
70/140 MHz Select 50 or 75( Ω) using the arrow keys, then press ENTER.
L-Band Not applicable.
(CONFIG:) Tx Æ Scram
Tx Scrambling Index:
Gold-n = 000000 (▲ ▼ E)
The Gold-n Index indicates the Physical Layer spreading sequence number, and can be set from 0
to 262,141. The default setting is all 0s. To edit, use the
W X arrow keys to select the digit to be
edited, then use the ST arrow keys to change the value of the digit. Press
ENTER
when done.
6.3.1.3 CONFIG: Rx
Rx: FEC Dem Code SymRate
Freq EbNo PLL (E)
Select FEC, Dem(od), Code, SymRate, Freq, EbNo, or PLL using the W X arrow keys, then
press
ENTER . Note the following:
IMPORTANT
The CDM-710G operates only in DVB-S2 mode; this makes several Rx
parameters read-only. These parameters are resolved automatically and do not
need to be configured:
• Rx: Dem (Demodulation Type)
• Rx Dem Æ Inv (Spectrum Invert)
• Rx Dem Æ Pilot
• Rx: Code Rate
(CONFIG:) Rx
Æ FEC
If Rx Æ FEC is selected:
Rx FEC:
LDPC + BCH (E)
This is a read-only status message. Press
ENTER
or
CLEAR
to return to the previous menu.