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4. IF Amplitude Adjustments
Equipment
Frequency synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A
Adapters
Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476
Cables
BNC,122cm(48in)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A
Test cable
. . . . . . . . . . . . . . . . . . . . . .
. . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
85680-60093
A5 IF A4 LOG AMP/CAL OSC
(REVIS
CONNEC
J9
J5
J8
ION
TOR
J7
J6
J4
J3
c707
R445
JIO
(REVISION
CONNECTOR)
Jll
J5
Jl
fd’J4
R53l-
sjlle
Figure 2-8. IF Amplitude Adjustment Locations
Note
The 15 dB reference attenuator adjustment is preset at the factory and need
not be done if the entire A5 IF assembly is replaced.
Procedure
1. Press
luNE)
to turn the spectrum analyzer off. Remove the spectrum analyzer cover and
place the spectrum analyzer in the service position as illustrated in Figure 2-7.
2. Disconnect W29, violet coax cable, from
A5J3.
Connect the test cable between A5J3 and
the 50
R
output of the HP 3335A. Press
m
to turn the spectrum analyzer on.
Adjustment Procedures 2-27