32 Keysight N2791A/N2891A High-Voltage Differential Probes User Guide
N2891A Performance Verification Procedures
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.
Table 7 Required Test Equipment
DC Differential Gain Accuracy
Description Critical Specifications Recommended Model Part Number Functions
Digitizing
Oscilloscope
Bandwidth: >50 MHz
1 MΩ/50Ω selectable input
Keysight MSO9254A Display probe output
Signal Generator
Precision DC voltage
source
Amplitude accuracy: less than or equal
to 0.25%
1 MΩ/50Ω 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 Keysight 1251-2277 Interconnection between probe and
generator
50 Ω BNC Feed
Through Adapter
50 Ω precision feed through Keysight 11048C Termination between probe and
calibrator for bandwidth verification
Generator produces hazardous voltages. To avoid shock, do not touch
exposed metal parts after generator output is enabled.
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.
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