Performance Verification
VX4792 User Manual
F-25
Clock Frequency and Amplitude Checks
These procedures check the accuracy of the clock frequency and the clock output
amplitude.
This procedure checks the CLOCK OUTPUT signal frequency accuracy.
Electrical Characteristic Checked: Clock Generator, Accuracy, on page E–2.
Equipment Required: A 50 coaxial cable and a frequency counter.
Prerequisites: The instrument must meet the prerequisites listed on page F–3.
Procedure:
1. Install test setup and set test equipment controls (see Figure F–12):
Figure F-12: Clock Frequency Accuracy Initial Test Setup
a. Connect frequency counter: Connect the CLOCK OUTPUT to the
frequency counter input through a coaxial cable.
b. Set frequency counter controls:
CHANNEL A
Termination 50
Slope Negative
Attenuation X5
Coupling DC
FREQ A
Check Clock Frequency
Accuracy
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