Comtech EF Data CDM-760 - Manual (Page 383)

Appendix J Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
J–5
the version of the near end carrier on the downlink side and then passes the desired carrier to
the demodulator for normal processing.
To further illustrate in Figure J-4, without CnC, the two carriers in a typical full duplex satellite
link are adjacent to each other. With CnC, only the composite signal is visible when observed on
a spectrum analyzer. Carrier 1 and Carrier 2 (shown here for reference only) are overlapping,
thus sharing the same spectrum.
Figure J-2. Conventional FDMA Link
Figure J-3. Same Link Using CDM-760 and DoubleTalk Carrier-in-Carrier