Config: Rx Fec; Config: Rx Demod - Comtech EF Data CDM-Qx Installation And Operation Manual

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier®
Front Panel Operation
5.4.3.1 CONFIG: Rx
Rx FEC: Vit Vit+RS TCM+RS
TPC
For the Transmit FEC type, select Vit, Vit+RS, TCM+RS, or TPC using the
then press
ENTER
All possible choices are presented at all times. If an option is not installed (either
Hardware, or FAST) or not valid, the ◄ ► arrow keys will force the cursor to
skip past the unavailable choice.
Note the following:
FEC TYPE
Vit (Viterbi)
Vit+RS (Viterbi +Concatenated
Reed-Solomon)
TCM+RS (Trellis Coded Modulation
+ Concatenated Reed-Solomon)
TPC (Turbo)
SelectingVIT+RS or TCM+RS displays the following submenu:
Rx Rs (n/k)
IESS-310 network
5.4.3.2 CONFIG: Rx
Demodulation: BPSK
16-QAM
For the Receive Demodulation Scheme, select BPSK, QPSK, 8-PSK, or 16-QAM using the
arrow keys, then press
All possible choices are presented at all times. If an option is not installed (either
Hardware, or FAST) or not valid, the ◄ ► arrow keys will force the cursor to
skip past the unavailable choice.
Note the following:
CASE
BPSK
QPSK
8-PSK
16-QAM
FEC
(◄ ►,ENT)
.
RULES
Always valid
Always valid
If 8-PSK FAST is enabled
If the TPC codec is installed
Demod
QPSK
.
ENTER
RULES
Valid for all FEC types except TCM+R-S
Valid for all FEC types except TCM+R-S
Valid for TCM+R-S, TPC (Turbo) requires 8-PSK FAST option
Valid for Viterbi + R-S, TPC (Turbo) requires 16-QAM FAST option
(◄ ►,ENT)
(219/201)
8-PSK
(◄ ►,ENT)
5–22
Revision 7
MN/CDMQX.IOM
arrow keys,
◄ ►
COMMENT
Fixed at 8-PSK and Rate 2/3
◄ ►