HP 5384A Service Manual

HP 5384A and HP 5385A
Adjustments
5-13. HP 5384A/HP 5385A Channel A Input
Amplifier Adjustment Procedure
5-14. To perform the sensitivity adjustment, proceed
as follows:
a. Remove the HP 5384A/HP 5385A top and
bottom covers; locate variable resistor A1R43 as
shown in Figure 5-1, Assembly Adjustment locator.
b. Cycle the power switch from STBY to ON.
Allow 30 minutes warm-up time.
c. Connect the HP 8656A Signal Generator as
shown in Figure 5-2.
d. Set the HP 8656A to output a 10 MHz sinewave
at 10 mV rms.
e. Connect the scope probe at the junction of
A1R19 and A1R65E. See Figure 5-1 for probe con-
nection point.
f. Adjust A 1R43 for a 50150 duty cycle. Refer to the
waveform in Figure 5-3.
g. Vary the frequency of the signal generator from
10 MHz to 100 MHz, and verify that the counter shows
a
stable display throughout.
h. Connect a suitable generator (such as the HP
3325A) to input A that can provide a 25 mV rms sine
wave
between 10 Hz and 50 Hz. Vary the generator
frequency between 10 Hz and 50 Hz and verify that
the displayed counts are stable.
Figure 5-1. Assembly Adjustment Locator
5-2
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HP 5384A Specifications

General

Brand	HP
Model	5384A
Category	Cash Counter
Language	English