5
N7026A 150 MHz AC/DC High Sensitivity Current Probes
User’s Guide
Introduction
The N7026A is a wide-band, DC to 150 MHz, clamp-on active current probe. It is ideal for
acquiring high transient time signals such as those found in motor controllers, in switching
power supplies, and in current amplifiers driving inductive loads.
This high bandwidth, high sensitivity (1V/A), and low noise probe enables you to achieve a
high degree of precision even while measuring very low-current waveforms.
The following sections briefly describe the key features of this probe.
AutoProbe Interface
The probe’s output connector has the AutoProbe interface that allows it to connect directly
to a Keysight InfiniiVision or Infiniium oscilloscope that has 1 M
Ω
AutoProbe connector. The
oscilloscope’s AutoProbe interface provides the probe power, probe offset, and auto
configuration of probe type and attenuation setting on connection.
External Power Supply
The probe also comes with an external power supply adapter that allows you to use this
probe to measure large amplitude currents (upto
±
30A
RMS
).
Operating Modes
The probe can operate in the following two modes as per the attenuation setting
automatically configured and switched by the oscilloscope.
-
High-sensitivity mode
- The probe’s attenuation is 1V/A with 10x gain amplifiers to enable
higher sensitivity current measurements. The oscilloscope automatically switches the
probe’s attenuation to high-sensitivity if the Amps/division scale of the channel is equal
to or less than 200mA/div.
-
Low-sensitivity mode
- The probe’s attenuation is 0.2V/A without any modifications to the
signal. The oscilloscope automatically switches the probe’s attenuation to
low-sensitivity if the Amps/division scale of the channel is greater than 200mA/div.
Auto Demagnetization (Degauss) and Calibration
The probe’s auto demagnetization (degauss) and calibration features remove any residual
magnetism and unwanted DC offset in the probe.
