HP 5328A User Manual

Model 5328A
Operation
SECTION Ill
OPERATION
3-1. INTRODUCTION
3-2.
This section containsoperating information necessary to understand operation and control
of the instrument. A description of basic counter operation
is provided, followed by a front panel
operation summary for the standard mainframe (Figure 3-8) and a separate operation summary
for each option (Figures 3-10 through 3-13). Rear panel controls and connectors aredescribed in
Figure 3-9. Detailed information is provided on the use of controls and indicators. Information
on how to make measurements in the various measurement modes
is provided in Section IV.
3-3. BASIC COUNTER OPERATION
3-4. The operation of the frequency counter is best understood by describing how thecounter
performs a frequency measurement.
if n is the number of cycles of a signai that occurs in a time
period t, the average frequency
f of that signal over the time period t is given by
3-5. Frequency
3-6.
The counter measures the frequency
f by accumulating the number of cycles n of the input
signal that occurs over the time period t. The basic counter elements necessary to perform this
measurement are shown in Figure 3-1.
MAIN GATE
FLIP FLOP
ASSEMBLIES
I
$.
DISPLAY
TIME BASE
DIVIDERS
I
Figure 3-7. Basic Elements of the Frequency Counter
3-7. INPUT AMPLIFIER AND TRIGGER
- essentially conditions the input signal to aform that is
compatible with the internal circuitry of the counter. As Figure 3-1 indicates, the output of the
amplifier/trigger
is a pulse train where each pulse corresponds to one cycle or event of the input
signal.
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HP 5328A Specifications

General

Brand	HP
Model	5328A
Category	Cash Counter
Language	English