Use Satmaster - Comtech EF Data CDM-425 Installation And Operation Manual

F.3.2.3

Use Satmaster

F.3.2.4 Use a Spectrum Analyzer
You may use a Spectrum Analyzer capable of integrating the signal power in a given bandwidth
to estimate PSD Ratio or CnC Ratio:
CnC Ratio (in dB) = Power
PSD Ratio (in dB) = (Power
= CnC Ratio – 10 log (BW
If the two carriers have the same Symbol Rate / Bandwidth, then the CnC Ratio is same as the
PSD Ratio.
Appendix F
(in dBm) – Power (in dBm)
C1 C2
– 10 log BW (in Hz)) – (Power
C1 C1
/ BW )
C1 C2
F–21
CDM-425 Advanced Satellite Modem
– 10 log BW (in Hz))
C2 C2
MN-CDM-425
Revision 0