Config: Rx Freq (Frequency) - Comtech EF Data CDM-625A Installation And Operation Manual

Advanced satellite modem (18 kbps – 25 mbps)

Hide thumbs Also See for CDM-625A:

Table of Contents

CDM-625A Advanced Satellite Modem

Front Panel Operation

demodulator automatically synchronizes to either the normal time-ordering of

bits FEC codeword pairs, or the inverted ordering used by certain other

manufacturers.

Rxα (Rx Alpha Filter Rolloff Factor) – Use the

ENTER. Valid settings are:

Rxα (Rx Alpha rollout Factor) (%)

CONFIG: Rx Freq (Frequency)

Rx-IF Frequency:

Edit the Rx-IF Frequency by using the

arrow keys to change that digit. Press ENTER. Valid settings are:

IF Frequency

L-Band (FAST Option)

When you use the ODU menus to configure an LNB lockout frequency, this screen displays a

second line of information (this example uses low-sided mix):

Rx-IF Frequency:

(LO:12500 MHz

The Satellite frequency updates accordingly as you edit the IF frequency.

Satellite frequency = LO ± IF frequency

by the LO mix parameter:

Select Rxα = 0.35 if the Txα of the signal being received is 0.25 or 0.35.

Select Rxα = 0.12 if the Txα of the signal being received is 0.20, 0.15, 0.10, or

950-2250 MHz

Sat:13700.0000 MHz) ()

High-sided mix [–] (includes a spectral inversion);

Low-sided mix [+].

arrow keys to select the Txα. Press

0050.0000 MHz

arrow keys to select a digit, and then using the

1200.0000 MHz

Step Size (Increment)

, where the sign is determined

Chapters

Table of Contents