Iq-Tp; (Config: Rx) Dem Pilot (Dvb-S2 Mode Only); (Config: Rx) Dem Scr (Descrambler)( Dvb-S2 Mode Only); (Config: Rx) Code - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Front Panel Operation
(CONFIG: Rx) Dem
Rx IQ TPs (J2-11,J2-3):
Pre-EQ
This selection determines whether the IQ test point located on the Alarm Connector samples the
IQ signal before or after the Adaptive Equalizer. J2-11 and J2-3 refer to the Alarms Connector
pins to which an oscilloscope is connected, for the purpose of monitoring I and Q.
Select Pre-Eq or Post-Eq using the
(CONFIG: Rx) Dem
Rx Demodulation Pilot:
Off On
This screen is 'status only' as the demodulator automatically determines if the pilots are Off
or On.
Press
ENTER
(CONFIG: Rx) Dem
Rx Descrambling Index:
Gold-n = 000000
The Gold-n Index indicates the Physical Layer spreading sequence number.
To edit the index, use the
arrow keys to change the value of that digit. The index can be set from 000000 to 262,141 – the
default setting is all 0s. Press

(CONFIG: Rx) Code

Code Rate: 1/2 3/5 2/3
3/4 4/5 5/6 7/8 8/9 9/10
Refer to the Data Rate menu for valid code rates. The cursor only lands on valid code rates
depending upon the mode and purchased options. If the Mode is set to DVB-S2, this screen is
'status only' and the demodulator automatically resolves the code rate.
Prior to synchronization of the Rx path, the cursor may reside in any position.
• All possible choices are presented at all times.
• If an option is not installed (either Hardware or FAST) or is not valid, or if a
IMPORTANT
Select the code rate by using the ◄ ► arrow keys, then press

IQ-TP

Post-EQ (

Pilot (DVB-S2 mode only)

or to return to the previous menu.
CLEAR

Scr (Descrambler)( DVB-S2 mode only)

(
arrow keys to select the digit to be edited, then use the
ENTER
code rate is not available for the Mode selected, the ◄ ► arrow keys will
force the cursor to skip past the unavailable choice.
E)
arrow keys, then press
( E)
▲ ▼ E)
when done.
ENTER
5–21
Revision 11
MN/CDM710.IOM
.
ENTER
.