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MODEL 8559A
ADJUSTMENTS
ADJUSTMENTS
5
-
19.
LOG AMPLIFIER LOG AND LINEAR ADJUSTMENTS
REFERENCE:
A14 and A1 5 Schematics
DESCRIPTION:
Step attenuators are used to change the level of the input signal to the spectrum analyzer in calibrated steps. The
output of Vertical Driver and Blanking Assembly A15 is monitored, and adjustments are performed to calibrate
Log Amplifier Assembly A14.
SIGNAL QENERATOR
DlQlTAL VOLTMETER
Dl SPLAY
1
CABLE
RF OUTPUT
I
A
S
S
E
M
B
L
Y
ADAPTER
ADAPTER
65
1
AtOWl
EXTENDER
CABLE
-'OZ~~
SPECTRUM
@@@
ANALYZER
I
STEP
ATTENUATORS
ADAPTER
FIGURE
53.
LOG AMPLIFIER LOG AND LINEAR ADJUSTMENTSTEST SETUP
EQUIPMENT:
Signal Generator
.........................................................
HP 8640B
Digital Voltmeter
........................................................
HP 3456A
Step Attenuator (10-dB/step)
......................................
HP 355D, Opt. H82
Step Attenuator
(1-dB/step)
.......................................
HP 355C, Opt. H80
Cable Assembly, Banana Plug to BNC (m)
...................................
HP 1-1001A
Adapter, Type N (m) to BNC
(f)
.........................................
HP 1250
-
0780
Adapter, SMC
(m)
to BNC
(f)
...........................................
HP 1250
-
0832
Extender Cable Assembly
..............................................
HP 5060
-
0303