Comtech EF Data SLM-5650A Installation And Operation Manual page 488

G.4.2.2 Estimating PSD Ratio from Satmaster
G.4.2.3 Estimating PSD Ratio Using Spectrum Analyzer
PSD Ratio or CnC Ratio can also be estimated using a Spectrum Analyzer capable of integrating
the signal power in a given bandwidth.
CnC Ratio (in dB) = Power
PSD Ratio (in dB) = (Power
BW (in Hz))
C2
If the two carriers have same Symbol Rate / Bandwidth, then the CnC Ratio is same as the PSD
Ratio.
Appendix H
(in dBm) – Power
C1
C1
= CnC Ratio – 10 log (BW
C2
– 10 log BW (in Hz)) – (Power
C1
/ BW )
C1 C2
G–22
SLM-5650A Satellite Modem
Revision 10
(in dBm)
– 10 log
C2
MN-SLM-5650A