Datasheet

12 | Keysight | InniiVision Oscilloscope Probes and Accessories - Data Sheet
High-voltage Differential
Active Probes
– 25 to 800 MHz bandwidth
– Switchable attenuation
– Measure up to 1,400 V CAT II and 7 kV
CAT I
N2790A/91A and N2891A high
voltage differential probes
Oscilloscope users often need to make
oating 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 oating measurements with
an oscilloscope. The N2790A, N2791A,
and N2891A high voltage differential
probes allow conventional earth-grounded
Keysight oscilloscope to be used for
oating signal measurements.
Each probe offers user-selectable
attenuation settings that make 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.
1141A 200 MHz differential
probe
The 1141A is a 1x FET differential probe
with 200-MHz bandwidth and a 3000:1
CMRR. The probe has a high-input
resistance and low-input capacitance of 7
pF to minimize circuit loading. The 1141A
must be used with 1142A probe control
and power module, which controls input
coupling modes dc, dc with variable offset,
and dc reject. Two attenuators, 10x and
100x are provided to expand the linear
differential input range to ±30 V. This
probe works with any 50-Ω input
oscilloscope including 3000 X-, 4000 X-,
5000, 6000X, 6000 300 MHz - 1 GHz, and
7000 Series.
1141A 200-MHz differential probe with 1142A probe
control and power module
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
–50 dB at 1 kHz
-–50 dB at 1 MHz
–80 dB at 50/60 Hz
–40 dB at 1 MHz
–80 dB at 50/60 Hz
–60 dB at 20 kHz
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)
±600 V (CAT III)
±700 V at 100:1
±70 V at 10:1
±7000 V at 1000:1
±700 V at 100:1
Max input voltage
between two
inputs
±1400 V at 500:1
±140 V at 50:1
±700 V at 100:1
±70 V at 10:1
±7000 V at 1000:1
±700 V at 100:1
Max number of
probes supported
by 3000 X-/4000
X-/ 5000/6000
/7000 Series
4 4 4
1141A
Bandwidth 200 MHz
Risetime 1.75 ns
Attenuation ratio 1:1 without attenuator,
10:1 and 100:1
with attenuater
CMRR 3000:1 at 1 MHz
10:1 at 100 MHz
Input
impedance
Between inputs:
1 MΩ//7 pF
Max input voltage 200 Vdc + peak ac
(probe alone)
500 Vdc + peak ac
(with attenuator)
Max number
of probes
supported by
3000 X-/4000 X-
/6000 X-
/5000/6000/7000
Series
4
Characteristics for N2790A, N2791A and N2891A differential probe
Characteristics for 1141A
differential probe