Estimating Psd Ratio From Satmaster; Estimating Psd Ratio Using Spectrum Analyzer - Comtech EF Data CDM-625 Installation And Operation Manual

CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
10.5.2.2

Estimating PSD Ratio from Satmaster

10.5.2.3

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
= CnC Ratio – 10 log (BW
If the two carriers have same Symbol Rate / Bandwidth, then the CnC Ratio is same as the PSD
Ratio.
(in dBm) – Power (in dBm)
C1 C2
– 10 log BW (in Hz)) – (Power
C1 C1
/ BW )
C1 C2
10–19
– 10 log BW (in Hz))
C2 C2
Revision 13
MN-CDM625