Operator’s Manual
923064-00 Rev A
9
Making Measurements
Ensure the probe is fitted with four high-quality, AA cells. These should be cells that are
protected from leakage which could damage the power supply contacts in the probes.
Before making any measurements or connections refer to the safety information contained
in this document.
Connect the probe to one of the oscilloscope input channels ensuring the BNC connector is
fully mated, and the safety ground lead to the oscilloscope CAL BNC connection.
Select the proper range setting on the probe using the slide-switch on the probe body.
Adjust the input coupling impedance and attenuation of the oscilloscope channel to which
the probe is connected using the Probe tab of the Channel (Vertical) setup dialog.
Ensure 1 M
input impedance ( ‘DC1M
’ or ‘AC1M
’ ) is selected. The use of 50
input
impedance will unduly load the output of the differential probe resulting in reduced
amplitude output and incorrect scaling.
To ensure the oscilloscope correctly interprets the vertical waveform scale be sure to adjust
the probe attenuation setting using the ‘Probe Atten’ menu controls. The example shown,
x100 probe attenuation, would achieve correct vertical scaling AP031 operating with a
maximum range of ± 700 V.
Finally, adjust the vertical sensitivity and offset of the oscilloscope channel to which the
probe is connected to achieve an optimum display.
Range Setting
Probe Operating Range (DC + Peak AC)
1/10
± 70 V
1/100
± 700 V
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