Keysight Technologies TN2870A Series Manuale utente

Quick Start Guide

1900 Garden of the Gods Road

Colorado Springs, CO 80907 USA

N2140-92003, November 2020,

Available in electronic format only

If your probe requires cleaning, disconnect

it from the instrument and clean it with

mild detergent and water. Make sure the

probe is completely dry before connecting

it to the instrument.

Safety and Regulatory Information

The CE mark is a registered trademark of the

European Community. ISM GRP 1-A denotes the

instrument is an Industrial Scientific and Medical

Group 1 Class A product. ICES/NMB-001

indicates product compliance with the Canadian

Interference-Causing Equipment Standard.

IEC Measurement category II is for measurements

performed on circuits directly connected to the

low voltage installation. Example. Household

appliances portable tools, and similar equipment.

CSA is the Canadian certification mark to

demonstrate compliance with the Safety requirements.

CAT II

Indoor Use Only. Do not operate in wet / damp /

explosive environments. Keep product surfaces

dry and clean.

To avoid personal injury or to prevent fire or

damage to this product or products connected to

it, review and comply with the following safety

precautions. Be aware that if you use this product

in a manner not specified, the protection

that the product provides may be impaired.

The probe cable is a sensitive part of the probe

and, therefore, you should be careful not to

damage it through excessive bending or pulling.

Avoid any mechanical shocks to the product to

guarantee accurate performance and protection.

Some of the probe tips / accessories are very

sharp. You should handle these with care to

avoid personal injury.

Use only Grounded instruments. Do not connect

the probe’s ground lead to a potential other than

earth ground. Always make sure that the probe

and oscilloscope are grounded properly.

Connect the probe to the oscilloscope and

connect the ground lead to earth ground before

connecting the probe to the circuit under test.

Disconnect the probe input and the probe ground

lead from the circuit under test before

disconnecting the probe from the oscilloscope.

Do not use the probe assembly if the red wear

indicator in the cable has become visible.

Keysight N2140A and N2142A

Passive Probes

This symbol indicates the Environmental Protection

Use Period (EPUP) for the product’s toxic

substances for the China RoHS requirements.

Repair and Service

For technical assistance, you can contact your local Keysight

Technologies Call Center.

>In the Americas, call 1 (800) 829- 4444

>In other regions, visit http://www.keysight.com/find/assist

For all repair or service needs, we recommend sending the probe

to a Keysight authorized service center.

Visit http://www.keysight.com/find/assist to find a service

location near you.

Do not install substitute parts or perform any

unauthorized modification to the product. Only

Keysight authorized service centers should

perform repair/maintenance on the product.

Before returning the probe for service, you must first call the

Call Center at 1 (800) 829- 4444.

*N2140-92003*

www.prbtek.com

DATA SHEE TN2870A Series Passive Probes and Accessoriesÿÿÿÿÿwww.prbtek.com ÿÿÿÿÿ4000-029-016

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 x-series oscilloscopes or similar oscilloscopes with

1 Mohm BNC input.

Table 3 - Physical & Environmental Characteristics

Characteristic Value

Probe Body

Cable Length

Weight

95mm

1200mm

55g

Table 2 - Electrical Characteristics

Characteristic Value

Attenuation Ratio

Input Capacitance

Compensation range

(when terminated

into 1 Mohm)

1:1 / 10:1

1:1 - 100pf

15pf - 30pf

Input Resistance

Maximum Input

Voltage

1:1 - 150V rms CAT II

1:1 - 1MΩ

Temperature

Humidity

Altitude

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.

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 30pF.

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

amplitude accuracy from DC to the upper bandwidth limit

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.

10:1 - 15pf

10:1 - 10MΩ

Table 1 - Probe and its Supplied Accessories

ID Part Quantity

For N2140A For N2142A

Hook Tip

Ground Spring

Ground Lead

Adjustment Tool

Protective Cap

Channel

Identification rings

1 1

16 rings total

(4 rings of each color)

These accessories are provided in the N2141A kit for the

N2140A probe and the N2143A kit for the N2142A probe.













Undercompensated Overcompensated Optimum

10:1 - 300V rms CAT II

3,000 m (9,842 ft) (Operating)

12200 m (40,026 ft) (Non-operating)

Bandwidth For N2140A

1:1 - 6 MHz

10:1 - 200 MHz

For N2142A

1:1 - 6 MHz

10:1 - 75 MHz

5% to 90% RH up to 30 °C (Operating)

5% to 65% RH above 30 °C up to 55 °C

(Non-operating)

-10 °C to +55 °C (Operating)

-40 °C to +70 °C (Non-operating)



Passive probe

2 2

BNC

Connector

Pin hole

without

apin

Current Rating

(DC, 1:1, & maximum voltage)

0.15mA

To perform LF compensation:

1 Connect the probe to the oscilloscope’s front-panel

calibration output (a square wave label is usually seen near

this output).

2 Use the supplied adjustment tool to adjust the LF

compensation to an optimum square wave response as

shown in the figure below.

For optimal probe compensation:

- Allow the oscilloscope (with the probe connected) to warm

up for at least 30 minutes.

- Repeat the compensation steps if the ambient temperature

in the area in which the oscilloscope is being used changes

by more than 5 degrees C.

- Do NOT push down on the adjustment screw when engaging

or turning this screw.

To securely engage the hook tip with the

probe, ensure that you push the hook tip

onto the probe completely until it stops

and then release it.

www.prbtek.com

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