Trimmer Tool - Keysight N2791A User Manual

Offset Zero Calibration Procedure
The N2791A/N2891A differential probe can be adjusted for zeroing out the
probe's offset voltage using the trimmer tool supplied with the probe. Follow this
procedure to perform the offset zero calibration.
1 Connect the N2791A/N2891A probe to channel 1 of the scope. Turn on the probe
power. You may use the USB power code or batteries to power the probe. Select
the probe attenuation ratio to 10:1 (for N2791A) or 100:1 (for N2891A).
2 Short the + and - probe inputs together with the hook tips.
3 Turn on power to the oscilloscope and the probe, and leave them on for > 30
minutes so they can stabilize.
[Default Setup]
4 Press
5 Press the channel 1 button, then press the Probe softkey, and then set the units
to Volt and the probe attenuation to 10:1 (for N2791A) or 100:1 (for N2891A).
6 Set the scope to DC coupled mode and the scope offset to 0 Volt.
7 Set the oscilloscope to Averaging mode (x8 or higher) or high-resolution mode
to reduce oscilloscope noise.
8 Using the trimmer tool that comes with the probe, adjust the probe offset voltage
to 0 volts.
[Auto Scale]
and
Offset Zero Calibration Procedure
on the oscilloscope.
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