Keysight N2840A User Manual
  1. Manuals
  2. Brands
  3. Keysight Manuals
  4. Test Equipment
  5. N2840A
  6. User manual
Keysight N2840A User Manual

Keysight N2840A User Manual

High-impedance passive probes
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
N2840/1/2/3A and N2853A High-Impedance
Passive Probes
USER GUIDE

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the N2840A and is the answer not in the manual?

Questions and answers

Related Manuals for Keysight N2840A

Summary of Contents for Keysight N2840A

  • Page 1 N2840/1/2/3A and N2853A High-Impedance Passive Probes USER GUIDE...
  • Page 2 Notices © Keysight Technologies, 2012, 2017, 2018, writing elsewhere in the EULA. Keysight shall 2020, 2023 be under no obligation to update, revise or Technology Licenses otherwise modify the Software. With respect No part of this manual may be reproduced in...

  • Page 3: Table Of Contents

    Contents Contents Introduction Oscilloscope Compatibility Handling the Probe Accessories Cleaning the Probe Inspecting the Probe Using the Probe Channel Identification Tags Retractable Hook Ground Spring Alligator Ground Lead BNC Adapter Printed-Circuit Board Adapter Dual-Lead Adapter Insulating Cap IC Insulating Cap To Replace the Probe Tip Low-Frequency Compensation Safety Information...

  • Page 4: Introduction

    The N2840/1/2/3A and N2853A high-impedance passive probes and accessories are a great choice for high quality at a very reasonable price. With the exception of the N2840A, the probes include probe ID capability that allows most oscilloscopes, such as Keysight’s InfiniiVision and Infiniium series, to detect the probe’s impedance and attenuation ratio.

  • Page 5: Accessories

    The probes come with the accessories shown in Figure 1. A probe tip is pre-installed on the probe. N2840A probes do not include the BNC adapter. Two additional accessories not supplied with the probes are available: the PCB socket adapter and the dual-lead adapter. Refer to “Printed-Circuit Board...
  • Page 6 BNC Adapter 1250-3978 Low-Frequency Compensation Adjustment Tool — Channel Identification Tags (2 of each color: green, — yellow, purple, and pink) a Not supplied with N2840A. Table 3 Available Accessories Accessory Kit Order Dual-Lead Adapter 0960-2923 Printed Circuit Board (PCB) Adapter...

  • Page 7: Cleaning The Probe

    Keysight Technologies Sales Office. If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as your Keysight Technologies Sales Office. Keep the shipping materials for the carrier’s inspection. The Keysight Technologies office will arrange for repair or replacement at Keysight Technologies’...

  • Page 8: Using The Probe

    Using the Probe Using the Probe This section describes how to attach the various accessories as well as the channel ID tags. Before making measurements, compensate the probe as explained in “Low-Frequency Compensation" on page 17. Must be Grounded. Before making connections to the input leads of WARNING this probe, ensure that the probe’s output connector is attached to the channel input of the oscilloscope and that the oscilloscope is properly...

  • Page 9: Retractable Hook

    Using the Probe Retractable Hook Use the retractable hook tip to make quick connections for hands-free probing. To attach the retractable hook tip to the probe, gently slip the hook tip onto the end of the probe barrel. Once the tip is attached to the probe, push the tip’s collar towards the probe body to expose the hook.

  • Page 10: Alligator Ground Lead

    Using the Probe Figure 4 Ground Spring Placed on Probe Tip Alligator Ground Lead Use the alligator ground lead to reach circuit grounding points that are farther away from the probing location than can be reached by the ground spring. Because the longer lead increases the inductance in the ground return path, this solution results in slightly lower performance than using the ground spring.

  • Page 11: Printed-Circuit Board Adapter

    Using the Probe The BNC adapter is not provided with N2840A probes but can be N OT E ordered (part number 1250-3978 Figure 6 BNC Adapter Printed-Circuit Board Adapter The Printed-Circuit Board (PCB) socket adapter provides a stable, permanent probing location, which minimizes the effects of a longer ground connection.
  • Page 12 Using the Probe Figure 7 PCB Socket Adapter Soldered on PC Board N2840/1/2/3A and N2853A User Guide...
  • Page 13 Using the Probe Figure 8 PCB Socket Adapter Plugged onto Breadboard N2840/1/2/3A and N2853A User Guide...

  • Page 14: Dual-Lead Adapter

    Using the Probe Dual-Lead Adapter The dual-lead adapter allows you to connect the probe to common probing test clips and hooks that have 0.025-inch (0.635 mm) pins. Insert the probe’s tip into the adapter as shown in Figure 9. The adapter’s leads are approximately 60 mm long.

  • Page 15: Ic Insulating Cap

    Using the Probe IC Insulating Cap The IC insulating cap fits over the probe tip and provides a convenient self-aligning connection to an IC’s pins. This helps to maintain contact on small fine-pitch pins and prevents shorting adjacent pins by preventing the probe tip from sliding between the legs of the component.

  • Page 16: To Replace The Probe Tip

    Using the Probe To Replace the Probe Tip A dull probe tip can make it more difficult to obtain a reliable connection. If this happens, replace the tip with one of the replacement probe tips that are provided with the probe. The probe tip screws onto the end of the probe barrel. Do not over tighten the replacement probe tip.

  • Page 17: Low-Frequency Compensation

    Low-Frequency Compensation Low-Frequency Compensation The probes can be adjusted for low-frequency (LF) compensation. 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 influences the overall system performance (probe and oscilloscope) and introduces measurement errors resulting in inaccurate readings and distorted waveforms.
  • Page 18 Low-Frequency Compensation 4 If you are using a 2000X, 3000X, or 4000X InfiniiVision oscilloscopes, use the guided probe compensation: a Press the Probe softkey. b Press the Probe Comp softkey to run the compensation. If the probe is already properly adjusted, the guided N OTE compensation will not prompt you to make the adjustment.

  • Page 19: Safety Information

    Safety Information Safety Information To avoid personal injury and to prevent fire or damage to this product WARNING or products connected to it, review and comply with the following safety precautions. Be aware that if you use this probe assembly in a manner not specified, the protection this product provides may be impaired.
  • Page 20 Safety Information Observe Probe Ratings. Do not apply any electrical potential to the WARNING probe input which exceeds the maximum rating of the probe. Make sure to comply with the voltage versus frequency derating curve (Figure 14). This probe has a cable with a built-in wear indicator. When the WARNING insulation of the cable deteriorates, the wear indicator becomes visible.

  • Page 21: Characteristics

    20 minutes before any testing and the environ- mental conditions should not exceed the probe’s specified limits. Table 4 Electrical Characteristics Probe Description N2840A N2841A N2842A N2843A N2853A Bandwidth (–3 dB) 50 MHz...
  • Page 22 Characteristics Figure 14 Typical Voltage Derating Curve (Measurement CAT II) The maximum input voltage rating of the probe decreases as the WARNING frequency of the applied signal increases. Refer to the oscilloscope documentation for the oscilloscope’s CAUTION acceptable input range and do not exceed this limit when using the probes.

  • Page 23: Returning The Probe For Service

    Perform the following steps before shipping the probe back to Keysight Technologies for service. 1 Contact your nearest Keysight sales office for information on obtaining an RMA number and return address. 2 Write the following information on a tag and attach it to the malfunctioning equipment.
  • Page 24 Returning the Probe for Service N2840/1/2/3A and N2853A User Guide...
  • Page 25 8, 21, Safety Information, cable length, service, care, probe, supplied accessories, 5, channel identification tags, N2840A 50 MHz probe, 4, characteristics, N2841A 150 MHz probe, 4, cleaning, N2842A 300 MHz probe, 4, compensation range, temperature, operating and storage,...
  • Page 26 Index N2840/1/2/3A and N2853A User Guide...

This manual is also suitable for:

N2841aN2842aN2843aN2853a

Table of Contents