30
Keysight N2791A/N2891A High-Voltage Differential Probes User Guide
N2791A Performance Verification Procedures
7 Connect the output of the N2791A probe to channel 1 of the
oscilloscope.
8 Attach the BNC adapter to the Fluke channel 1 active head.
9 Attach the differential probe input leads by clipping the alligator clamp
to the BNC adapter banana post.
10 Set the probe to 100:1. Set the Fluke calibrator to 10 V and 1 KHz
standard amplitude output (channel 1, square wave, 1 M
Ω
load).
11 Enable the output of the calibrator.
12 Record the DC amplitude of the square wave and divide 100 into just
the amplitude of the oscilloscope. Verify that the probe gain accuracy
is ±2% + scope gain accuracy.
13 Set the calibrator to 1 V output and set the attenuation button on the
probe to 10:1.
14 Record the DC amplitude of the square wave and divide 10 into just the
amplitude of the oscilloscope. Verify that the probe gain accuracy is
±2% + scope gain accuracy.
15 Disable the calibrator output and leave the setup connected for the
next procedure.
Bandwidth
1 Connect the 50
Ω
BNC feed through adapter to the calibrator’s active
head channel 1.
2 Attach the BNC (f)-to-banana post adapter to the BNC feed through
adapter.
3 Attach the differential probe input leads by clipping the alligator clamp
to the BNC adapter banana post.
4 Set the probe to 10:1 attenuation.
5 Set the volts/division on channel 1 of the oscilloscope to 50 mV/div
and seconds/division to 50 ns/div. Set the trace to the center of the
oscilloscope. Input impedance should be set to 1
ΜΩ
. Set the average
mode to 16 points.
6 Set the calibrator to sine wave, 3 V peak-to-peak amplitude. Set the
frequency to 25 MHz, 50
Ω
load.
7 Write down the peak-to-peak amplitude measured by the
oscilloscope. It should be greater than or equal to 210 mV - scope
vertical accuracy.
8 Disable the generator output and disconnect the probe input.