CDM-600 Satellite Modem Revision 7
Front Panel Operation MN/CDM600.IOM
6–12
CONFIG: TX: MODULATION
Select one of the parameters using the [←] [→] arrow keys, and then edit using the [↑]
[↓] arrow keys. Edit the Modulation type and the FEC rate.
The Encoder type dictates the Modulation Type and FEC rate choices:
No Encoder: BPSK Fixed at 1/1
QPSK, OQPSK Fixed at 1/1
Non-Turbo Encoder: BPSK fixed at Rate 1/2
TCM 8-PSK fixed at Rate 2/3 (FAST option)
QPSK, OQPSK 1/2, 3/4 or 7/8
16-QAM 3/4 or 7/8 (Viterbi + Reed-Solomon only)
Turbo (with the 5 Mbps
Codec Installed):
BPSK 5/16 or 21/44
QPSK, OQPSK, fixed at 3/4
8-PSK, 16-QAM fixed at 3/4 (FAST option)
Turbo (with the 20 Mbps
Codec Installed, or the
TPC/LDPC Codec
installed):
BPSK 5/16 or 21/44
QPSK, OQPSK, 1/2, 3/4, 7/8 or 0.95
8-PSK 3/4, 7/8 , and 0.95 (FAST option)
16-QAM 3/4 and 7/8 (FAST option)
LDPC (with TPC/LDPC
Codec installed):
BPSK 1/2
QPSK, OQPSK, 1/2, 2/3, 3/4
8-PSK, 8-QAM 2/3, 3/4 (FAST Option)
16-QAM 3/4 (FAST option)
The following window will appear if the TPC/LDPC Codec is installed:

MODULATION= QPSK (B,Q,OQ-PSK)

FEC RATE = 1/2 (1/2,3/4,7/8)

MODULATION= QPSK (B,Q OQ,8PSK,16Q,8QAM)

FEC RATE = 1/2 (1/2,3/4,7/8)