Comtech EF Data SLM-5650A Installation And Operation Manual page 487

G.4.2 Estimating PSD Ratio
PSD can be estimated from a link budget using Downlink EIRP and Symbol Rate:
PSD = Downlink EIRP – 10 * Log (Symbol Rate)
PSD Ratio Example:
Carrier
A to B
B to A
PSD Ratio (@ A) = -29.99 – (-31.74) = 1.75 dB
PSD Ratio (@ B) = -31.74 – (-29.99) = -1.75 dB
G.4.2.1 Estimating PSD Ratio from LST
Appendix H
Downlink EIRP
27 dBW 500 ksps
24 dBW 375 ksps
G–21
SLM-5650A Satellite Modem
Symbol Rate Power Spectral Density
-29.99 dBW/Hz
-31.74 dBW/Hz
Revision 10
MN-SLM-5650A