Comtech EF Data CDM-750 - Manual (Page 110)

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Front Panel Operation MN-CDM750
5–32
First, use the W X arrow keys to select the parameter to update. Then, use the ST arrow keys
to edit the value for that setting (factory default for all settings is 0.0). Press ENTER when done.
Degradation figures can be used to further ensure that switching to higher order Modulation
will not cause errors, as may be the case in systems with higher levels of phase noise or non‐
linearities that can impact higher‐order modulation schemes (e.g., 16APSK and 32APSK
operation) more dramatically than QPSK or 8PSK operation.