Comtech EF Data SLM-5650A Installation And Operation Manual page 470

In a number of ways, CnC carriers behave similar to conventional carriers in satellite links. Both
are exposed to adjacent carriers, cross-polarization, and rain fade, and exhibit impairments when
any of these become too great. CnC additionally operates in an environment where:
•
Carriers intentionally occupy the same spectral slot, and
•
Performance depends upon desired and co-located interfering carrier. The interfering
carrier is canceled, leaving the desired carrier for demodulation.
G.2.1 Operational Recommendations
The rules for CnC operation are summarized as follows:
•
Both earth stations share the same footprint so each sees both carriers.
•
CnC carriers are operated in pairs.
•
One outbound with multiple return carriers is not allowed.
•
Asymmetric data rates are allowed (no restrictions).
•
The ratio of power spectral density is normally less than 11 dB.
•
CnC operates with modems – not modulators only or demodulators only.
Appendix H
Figure G-1. Conceptual Block Diagram
G–4
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A