Agilent Technologies 54657A, User Manual

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The following procedure can be used to setup a mask template for testing the
frequency of a sine wave or a square wave. Similar methods can be used to
generate masks for testing the frequency of signals of other shapes.
In the oscilloscope setup, the vertical sensitivity and position should be
adjusted so that the amplitude is almost full scale. The trigger level should
be adjusted to the middle of the input signal. The mask template can be
created by using a function generator to generate a signal of variable
frequency but of similar shape and amplitude to the one that is going to be
tested.
1
Connect the output of a function generator to the oscilloscope.
2
Set the function generator to generate a waveform with a similar
shape to the one that you are going to test.
3
Adjust the amplitude of the output until it is similar to the signal that
you are going to test.
4
Press
Time
on the oscilloscope, then press the
Freq
softkey to
turn on the automatic measurement for frequency.
5
Adjust the frequency of the output of the function generator to the
lower test limit.
The frequency can be verified by the automatic measurement.
6
Press
Autostore
.
7 Adjust the frequency of the output of the function generator to the upper test
limit.
An envelope of the test limit is generated.
8
Create a mask in the Define Automask menu with a tolerance of 0.0%.
For more information, refer to "To Create a Mask Template Using Autostore"
in this chapter.
9
Specify your test region in the Mask Editor menu.
Operating the Measurement/Storage Module
Creating a frequency testing mask
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