LESSON 2.
MODEL 5345A OPERATION
ACCP Subcourse MM0462
Model
5345A
Frequency
Time
Measurement System
LESSON OBJECTIVE
Given supportive text and diagrams;
1.
Explain/demonstrate
operation
of the 5345A.
2.
Explain each of the operating
modes.
3.
Explain
operating
considera-
tions.
4.
Correctly answer all exercise
questions.
CREDIT HOURS
Two
TEXT
1.
DESCRIPTION
a. General.
The Model 5345A Electronic Counter (figure 1) is a
reciprocal counter capable of direct measurements from dc to 500 MHz. High
speed digital logic circuits are incorporated to give a true direct counting
and totalizing capability.
Frequency coverage can be extended to 18 GHz
with the use of the 10590A plug-in adapter and the Model 5257A Transfer
Oscillator. On the other end of the spectrum, the direct coupled amplifiers
allow frequencies as low as 50 uHz to be displayed full scale.
The instrument measures frequency, period, period average, single-shot
time interval, time interval average, and ratio.
It also provides a
totalize function, whereby two signals can be simultaneously totalized with
the displayed result being the sum of difference in the total number of
counts.
Both frequency and period are measured by measuring the total elapsed
time for an integral number of cycles of the input waveform. This results
in a direct readout of frequencies between 50 uHz - 500 MHz, and period
readouts from 2 nsec to 20,000 seconds.
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