How [Auto Scale] Works
The
[Auto Scale]
key turns off all math waveforms, reference waveforms, and power analyses. It
then executes the following procedure to autoscale only those waveforms currently showing on
the display:
1.
The instrument selects the appropriate hardware measurement range for each signal.
2.
The instrument selects the vertical scale and offset for each signal.
3.
The instrument analyzes the signals in the following order to determine whether they have
frequency content: V1, V2, I1, I2, P1, P2. If one or more of these signals is displayed and has
frequency content, the instrument sets the horizontal timebase to display approximately
two cycles of the first displayed signal with frequency content.
4.
If a signal with frequency content was identified in the previous step, the instrument
configures the trigger to use the signal that defined the timebase to also define the trigger
level. The trigger level is set halfway between the signal's minimum and maximum values. If
no such signal was identified, the instrument sets the trigger mode to Autotrigger.
5.
The instrument sets the horizontal offset (delay) to 0.
After all of these steps have completed, the instrument sets the CWA Sync Offset for V1, V2, I1,
and I2, regardless of whether these signals are displayed.
The results of autoscaling are shown below.
Before Autoscale
After Autoscale
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Keysight IntegraVision PA2200 Series Power Analyzers Operating and Service Guide
