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The Keysight N2140A 200 MHz and N2142A 75 MHz passive
probes are high impedance probes with switchable attenuation
ratio (1:1 and 10:1). These are compatible with the Keysight
InfiniiVision EDUX1002A/G and DSOX1102A/G digital storage
oscilloscopes or similar oscilloscopes with 1 Mohm BNC input.
The BNC connector of these probes has a
pin hole without a pin. This is as per the
design and does not indicate any damage
or fault in the probe.
Pin hole
without
a pin
Table 1 - Probe and its Supplied Accessories
Quantity
ID
Part
For N2140A
Passive probe
2
Ground Spring
2
Ground Lead
2
Adjustment Tool
1
Hook Tip
2
Protective Cap
1
Channel
2 sets of each color with
Identification rings
two rings in each set
These accessories are provided in the N2141A kit for the
N2140A probe and the N2143A kit for the N2142A probe.
These probes have been designed and calibrated for use
with instruments having an input impedance of 1M Ω
paralleled by 20pF. However, these may be recalibrated for
use with instruments having an input capacitance of
15 to 40pF.
Adjusting Probes for Low-Frequency (LF) Compensation
The probe should be adjusted for LF compensation when it is
connected to an oscilloscope input for the first time. LF
compensation matches the probe cable capacitance to the
oscilloscope input capacitance. This matching assures good
BNC
amplitude accuracy from DC to the upper bandwidth limit
Connector
frequencies. A poorly compensated probe clearly influences
the overall system performance (probe and oscilloscope)
and introduces measurement errors resulting in inaccurate
readings and distorted waveforms.
To perform LF compensation:
1 Connect the probe to the oscilloscope's front-panel
For N2142A
calibration output (a square wave label is usually seen near
2
this output).
-
2 Use the supplied adjustment tool to adjust the LF
2
compensation to an optimum square wave response as
1
shown in the figure below.
2
1
Undercompensated
Overcompensated
Optimum
Table 2 - Electrical Characteristics
Characteristic
Value
1:1 / 10:1
Attenuation Ratio
Input Capacitance
1:1 - 100pf
Compensation range
15pf - 40pf
(when terminated
into 1 Mohm)
Input Resistance
1:1 - 1MΩ
Maximum Input
1:1 - 150V rms CAT II
Voltage
10:1 - 300V rms CAT II
Current Rating
0.15mA
(DC, 1:1, & maximum voltage)
For N2140A
Bandwidth
1:1 - 6 MHz
10:1 - 200 MHz
Table 3 - Physical & Environmental Characteristics
Value
Characteristic
Probe Body
95mm
Cable Length
1200mm
Weight
55g
Temperature
-10 °C to +55 °C (Operating)
-40 °C to +70 °C (Non-operating)
3,000 m (9,842 ft) (Operating)
Altitude
12200 m (40,026 ft) (Non-operating)
Humidity
5% to 95% RH up to 30 °C (Operating)
5% to 65% RH above 30 °C up to 55 °C
10:1 - 15pf
10:1 - 10MΩ
For N2142A
1:1 - 6 MHz
10:1 - 75 MHz
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