Datasheet

Page 15
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High-voltage Differential Active Probes
– 25 to 800 MHz bandwidth
– High common mode rejection ratio
– Measure up to 1,400 V CAT II and 7 kV mains isolated
N2790A/91A and N2891A high voltage differential probes
Oscilloscope users often need to make floating measurements where neither point
of the measurement is at earth ground. Use N2790A, N2791A, or N2891A high
voltage differential probes to make safe and accurate floating measurements with an
oscilloscope. The N2790A, N2791A, and N2891A high voltage differential probes allow
conventional earth-grounded Keysight oscilloscopes to be used for floating signal
measurements.
Each probe offers user-selectable attenuation settings that makes it highly versatile,
allowing it to be used for a broad range of applications. The probe comes with probe tip
accessories for use with small and large components in tight spaces.
The N2791A and N2891A are compatible with any oscilloscope with 1 MΩ BNC input.
The N2791A and N2891A probe power is supplied by included 4x AA batteries or USB
host port of the scope or PC via a supplied USB power cable. The N2790A is compatible
with the Keysight’s AutoProbe interface where the probe power is supplied by the
Keysight oscilloscope’s probe interface.
N2790A N2791A N2891A
Bandwidth 100 MHz 25 MHz 70 MHz
Risetime 3.5 ns 14 ns 5 ns
Attenuation ratio 50:1 / 500:1 10:1 / 100:1 100:1 / 1000:1
CMRR —80 dB at 50/60 Hz —80 dB at 50/60 Hz –80 dB at 50/60 Hz
—50 dB at 1 kHz —40 dB at 1 MHz –60 dB at 20 kHz
—50 dB at 1 MHz
Input impedance
(between inputs)
8 MΩ / 3.5 pF 8 MΩ / 8 pF 100 MΩ / 5 pF
Max input voltage to
ground
± 1000 V (CAT II) ± 700 V at 100:1 ± 7000 V at 1000:1
± 600 V (CAT III) ± 70 V at 10:1 ± 700 V at 100:1
Max input voltage
between two inputs
± 1400 V at 500:1 ± 700 V at 100:1 ± 7000 V at 1000:1
± 140 V at 50:1 ± 70 V at 10:1 ± 700 V at 100:1
Max number of probes
supported by 3000
X-/4000 X-/6000 X-/
5000/6000/7000 Series
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