Config:) Tx; Tx: Mod - Comtech EF Data CDM-700 Installation And Operation Manual

CDM-700 High Speed Satellite Modem
Front Panel Operation
6.3.1.2

(CONFIG:) Tx

Tx: Mod Code Freq Data
Sym Pwr Scram
The modem symbol rate is a function of the modulation type, code rate, and data rate. If a change
to one of these parameters produces a value outside the allowable symbol rate range, the invalid
symbol rate is not programmed into the modem.
For example: If the data rate is increased at one of the interfaces and the symbol rate exceeds the
limit it is possible that changing the modulation type or code rate will bring the symbol rate
within range.
All possible choices are presented at all times, If an option is not installed
(either Hardware or FAST) or valid, the ◄►arrow keys will force the cursor to
skip past the unavailable choice.
IMPORTANT
Tx: Mod
Tx Modulation: Type
α
Select Type, Inv, or α using the ◄ ► arrow keys. Press
If Tx Modulation
Tx Mod: Q
Select the Transmit Modulation Type by using the ◄ ► arrow keys. Press
are as follows:
Modulation Type (Symbol Rate) Selection
Q (QPSK)
8P (8-PSK)
16Q (16-QAM)
64Q (64-QAM)
( E)
Inv
(
Type is selected:
8P 16Q 64Q
(
6–12
E)
.
ENTER
E)
Description
Valid for all FEC types
Valid for all FEC types
Valid for all FEC types
Valid for all FEC types
Revision 5
MN/CDM700.IOM
. The choices
ENTER