Agilent Technologies 54657A, User Manual

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To create a mask template using Autostore
An envelope of the passing region can be generated using the Autostore
function. Then the Automask function can read the Autostore screen
information and take the maximum and minimum limits of it as the limit lines
of the mask template. This process allows you to create a mask template
from a known good signal, allowing certain tolerance margins.
1
Connect a known good signal to the oscilloscope.
2
Set up the oscilloscope with the settings that are required to test the
signal.
3
Press
Display
, then toggle the
Grid
softkey to the None
position.
4
Press
Autostore
.
Make sure that STORE is displayed in the status line. If STORE is not
displayed, press Autostore again.
5
Set the voltage tolerance by moving the waveform up and down with
the vertical position knob, creating a vertical envelope.
6
Set the time tolerance by moving the waveform back and forth with
the horizontal delay knob, creating a horizontal envelope.
You may need to repeat steps 5 and 6 to fine tune the envelope. Cursors can
be used to accurately measure the margins.
An alternative method is to vary the input signal amplitude (level) and
frequency (time) by the desired amount.
7
Press ±
.
8
Press the Mask Test softkey.
9
Press the
Use Mask
softkey to select the desired mask number (1 or 2).
10
Press the Define Mask Automask softkey.
Operating the Measurement/Storage Module
To create a mask template using Autostore
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