HP 8920A Application Handbook page 226

Using the Tracking Generator
50 Ω Load
Input
226
Measure/Adjust Return Loss as follows:
30. Measure and record return loss
31. Reverse the Pass Cavity output and input as shown.
RF IN/OUT DUPLEX OUT
POWER
OFF ON
MAX POWER 60 W
!
CONTINUOUS
Output
Pass Cav-
ity
Load
32. Measure and record return loss.
33. Repeat step while adjusting the Pass Cavity coupling loops for maximum
(but balanced) return loss in both directions.
MIC/ACC VOLUME
ANT IN
!
MAX POWER 200 mW
µV
MEM ORY
CARD
SQUELCH AUDIO OUT AUDIO IN
HI
MAX MAX
! !
12 v Pk 42 v Pk
LO