User`s guide

N2891A Performance Verification Procedures

The following procedure can be used to test and verify the DC differential gain

accuracy and bandwidth of the N2891A high voltage 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.

Required Test Equipment



DC Differential Gain Accuracy

WARNING: Generator produces hazardous voltages. To avoid shock, do

not touch exposed metal parts after generator output is enabled.

WARNING: These procedures require the application of high voltage to

the inputs of the N2891A probe. Because this adapter has exposed metal

surfaces, only qualified personnel should perform any testing with

voltage levels exceeding 30 Vrms. All pertinent safety rules and

guidelines for elevated voltage measurements should be followed and

adhered to.

1 Set the volts/division on channel 1 of the oscilloscope to 20 mV/div. Set the

seconds/div to 200 s and the acquisition mode to average 32.

Description Critical Specifications Recommended Model

Part Number

Functions

Digitizing Oscilloscope Bandwidth: >50 MHz

1 M/50 selectable input

Agilent MSO9254A Display probe output

Signal Generator

Precision DC voltage source

Amplitude accuracy: less than or

equal to 0.25%

1 M/50 selectable load

Sine wave greater than or equal

to 25 MHz

Fluke 9500B Signal source for DC

gain and bandwidth

BNC Adapter BNC (f) to Dual Banana (m)

Adapter

Agilent 1251-2277 Interconnection

between probe and

generator

50  BNC Feed Through

Adapter

50  precision feed through Agilent 11048C Termination between

probe and calibrator

for bandwidth

verification