Config: Tx: Mode; Config: Tx: Frequency; Config: Tx: Pwr - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Front Panel Operation

Config: Tx: Mode

Transmission Mode:
DVB-S2 DVB-S DVB-DSNG
The Mode is a key parameter for setting all modem parameters, and it is generally easier if it is
set first. The Mode determines which modulation, code rates, FEC type and symbol rate range are
available and also if Pilots or Gold Code settings are available. Changing the Mode will change
one or more of these.
After changing modes, check the modulation, code, and data rate selections.

Config: Tx: Frequency

TX Freq: 0140.0000 MHz
Edit the TX IF Frequency. This is accomplished by selecting the digit to be edited, using the

arrow keys. The value of the digit is then changed using the arrow keys. The user
should then press
70/140 MHz
L-Band
The bandwidth of the modulated Tx carrier must stay within the IF
frequency range. The modem disallows settings that exceed the range.
CAUTION

Config: Tx: Pwr

TX Power: Level
On/Off Imped
The Imped(ance) selection is only available when the 70/140 MHz Modulator
card is installed.
IMPORTANT
Select On or Off using the
(E)
.
ENTER
The ranges of frequencies are from 52 to 88 MHz and from 104 to 176 MHz with
a resolution of 100 Hz.
The range is 950 to 1950 MHz with 100 Hz resolution.
(E)

arrow keys. The user should then press
5–17
Revision 9
MN/CDM710.IOM
ENTER .