Aeroflex 3500A - Page 151

Subject to Export Control, see Cover Page for details. 2-111
2-5-6. MEASURING REVERSE POWER (cont)
10. Key the Transmitter and record the RSSI Meter reading.
11. Calculate Forward and Reverse Power:
FWD PWR (dBm) = T/R RSSI (dBm) + FWD Coupling
REV PWR (dBm) = ANT RSSI (dBm) + REV Coupling + Coupler Insertion Loss
20 92 128 164 200
Coupling (dB)
30.5
30.0
29.5
Fre
q
uenc
y
(
MHz
)
56
12. Calculate Power in Watts and Return Loss:
Power (Watts) = 10
(PWR (dBm)/10)
* 0.001
Return Loss = REV PWR (dBm) - FWD PWR (dBm) + 10 dB
20 56 92 128 164 200
)Bd(sso
L
noit
r
esnI
0.5
0.25
0
Frequency (MHz )