N2791A Performance Verification Procedures - Keysight N2791A User Manual

N2791A Performance Verification Procedures

The following procedure can be used to test the DC differential gain accuracy
and bandwidth of the N2791A differential probe. Please note that these
procedures do not indicate that these characteristics are warranted. Instead,
these procedures are meant to give you an idea of how your probe performs.
Description
Digitizing Oscilloscope
Signal Generator
Precision DC voltage
source
BNC Adapter
50 Ω BNC Feed Through
Adapter
DC Differential Gain Accuracy
1 Set the volts/division on channel 1 of the oscilloscope to 20 mV/div. Set the
seconds/div to 200 μs and the acquisition mode to average 64.
2 Set the volts/division on channel 2 of the oscilloscope to 500 mV/div. Trigger on
channel 2, select 50 Ω impedance.
3 Set the calibrator 9500B's channel 2 as the trigger channel (50 Ω load). Connect
the calibrator's channel 2 active head to channel 2 of the oscilloscope.
4 Connect the active head channel 1 from the Fluke 9500B to channel 1 of the
oscilloscope. Set the calibrator channel 1 to 0.1V peak-to-peak amplitude and
1 KHz (square wave, 1 MΩ load), enable the output.
5 Select the amplitude measurement on the oscilloscope and record the DC
amplitude (approximately 100 mV) of the square wave. This measurement is only
the oscilloscope.
6 Disable the Fluke calibrator output, disconnect the channel 1 active head from
channel 1 of the oscilloscope.
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.
Critical Specifications
Bandwidth: >50 MHz
1 MΩ/50Ω selectable input
Amplitude accuracy: less than
or equal to 0.25%
1 MΩ/50Ω selectable load
Sine wave greater than or
equal to 25 MHz
BNC (f) to Dual Banana (m)
Adapter
50 Ω precision feed through Keysight 11048C
N2791A Performance Verification Procedures
Required Test Equipment
Recommended Model
Part Number
Keysight MSO9254A
Fluke 9500B
Keysight 1251-2277
Functions
Display probe output
Signal source for DC gain
and bandwidth
Interconnection between
probe and generator
Termination between
probe and calibrator for
bandwidth verification
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