Comtech EF Data CDM-570A Installation And Operation Manual page 578

Carrier-in-Carrier link design involved trying different Modulation & FEC Code Rates to find the
optimal combination (the CDM-570A/AL also offers 5% to 35% transmit filter rolloffs that can be
used in addition to Modulation and FEC for link optimization):
•
QPSK, VersaFEC 0.706 with Carrier-in-Carrier
•
QPSK, VersaFEC 0.631 with Carrier-in-Carrier
•
QPSK, VersaFEC 0.533 with Carrier-in-Carrier
Link parameters and LST summary, for QPSK, VersaFEC 0.533 with Carrier-in-Carrier, is as
follows:
DoubleTalk Carrier-in-Carrier Option
CDM-570A/570AL Satellite Modem with Optional Packet Processor
Includes IF-RF Margin and CnC Margin
G–12
Revision 5
MN-CDM570A