CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Front Panel Operation MN/CDM570L.IOM
6–13

6.7.2 (CONFIG, TX) MODULATION

IMPORTANT NOTE: 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.
CASE RULES
BPSK Valid for all FEC types except TCM+RS
QPSK Valid for all FEC types except TCM+RS
OQPSK Valid for all FEC types except TCM+RS
8-PSK Requires TCM+RS OR Turbo OR TPC/LDPC AND requires
8-PSK/8-QAM FAST option
8-QAM Requires Turbo OR TPC/LDPC
AND requires 8-PSK/8-QAM FAST option
16-QAM Requires Viterbi+RS OR Turbo OR TPC/LDPC
AND requires 16-QAM FAST option

6.7.3 (CONFIG, TX) CODE RATE

IMPORTANT NOTE: 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.
CASE RULES
5/16 Requires BPSK AND Turbo
21/44 Requires BPSK or QPSK/OQPSK AND Turbo
1/2 Valid for BPSK, QPSK and OQPSK
2/3 Requires TCM AND 8-PSK AND RS codec installed OR
TPC/LDPC codec installed
3/4 Valid for QPSK, OQPSK, 8-PSK, 8-QAM and 16-QAM
7/8 Valid for QPSK, OQPSK, 8-PSK, 8-QAM and 16-QAM
0.95 Valid for QPSK, OQPSK, 8-PSK and 8-QAM
Unc (uncoded) Valid only for ‘Uncoded’ in FEC choice

Modulation: BPSK QPSK

OQPSK 8-PSK 16-QAM 8-QAM

Tx Code Rate: 5/16 21/44

1/2 2/3 3/4 7/8 0.95 Unc
IMPORTANT
IMPORTANT