Agilent technologies N2790A User Manual

N2790A Differential Voltage Probe

User’s Guide

For Safety, Regulatory, and publishing information, see the pages at the back of this book.

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Contents

Inspecting the Probe 3 Compatibility 4 Probe Parts Supplied 5 Characteristics and Specifications 6 Cleaning the Probe 8 Using the N2790A Probe 9 Service Strategy 10 Characterization Plots 11 Performance Verification Procedures 13

Inspecting the Probe

❏ Inspect the shipping container for damage.

Keep a damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the probe has been checked mechanically and electrically.

❏ Check the accessories.

Any accessories that were supplied with the probe are listed in the “Probe Parts Supplied” section of this manual.

• If the contents are incomplete or damaged, notify your Agilent Technologies Sales Office.

❏ Inspect the instrument.

• If there is mechanical damage or defect, or if the probe does not operate properly or pass calibration tests, notify your Agilent Technologies Sales Office.

• If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as your Agilent Technologies Sales Office. Keep the shipping materials for the carrier’s inspection. The Agilent Technologies office will arrange for repair or replacement at Agilent Technologies’ option without waiting for claim settlement.

Inspecting the Probe

N2790A Differential Voltage Probe

The N2790A differential probe allows you to safely measure high-voltage floating circuits with the oscilloscope grounded. It is ideal for many applications such as motor speed controls, power supply designs, and electronic high-power converters. The N2790A offers sufficient dynamic range and bandwidth for your application to make the floating measurements found in high-speed power electronic circuits safely and accurately.

With 100 MHz bandwidth, switchable attenuation of 50:1 and 500:1, and a maximum differential voltage input of 1400V (DC + peak AC), it provides the versatility for a broad range of applications including high-voltage circuits. Each probe comes with sharp browser probe tips for use on small components and in tight places, alligator clips for connecting to larger cables, and pincher clips.

The probe is powered by the autoprobe interface.

Compatibility

The N2790A differential probe is compatible with the following Agilent oscilloscopes:

• InfiniiVision Series 5000, 6000 (except 100 MHz), and 7000 with version 5.2 software or later

• Infiniium 9000 (with version 2.00 software or later), 8000 (with version 5.61 software or later), and 54830 Series (with version 5.61 software or later)

Inspecting the Probe

Probe Parts Supplied

The following diagram and table show the parts supplied with the N2790A Probe.

The probe tips you receive may look slightly different than the ones shown in this picture.

Parts for N2790A Probe Item Description Part Number

1 Differential voltage probe N2790-68701 2 Probe tips - browser tip (x2)

3 Probe tips - pincher clip (x2)

4 Probe tips - alligator plunger clip (x2)

5 Plastic pouch 6 Offset adjustment tool

To order the Probe Tip Accessory Kit (consisting of 2 browser tips, 2 pincher clips, and 2 alligator plunger tips), order part number N2790-68700. Probe tips are only for use with the N2790A differential voltage probe.

*Probe tips are not orderable separately.

(black and red pair)

A054*

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Characteristics and Specifications

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Characteristics and Specifications

Characteristics and specifications for the N2790A Differential Voltage Probe are shown below.

Electrical Characteristics

Attenuation ratios 50:1 and 500:1 (Selectable via switch on probe.) Bandwidth (-3 dB)* 100 MHz Gain Accuracy* \4% @ 0-20 oC, \2% @ 20-30 oC, \4% @ 30-

DC CMRR -70 dB @ 500VDC AC CMRR -80 dB @ 50/60 Hz

Input impedance Between inputs: 8 M , 3.5 pF Noise referenced to input < 300 mVrms @ 500:1

Propagation Delay 14.0 ns @ 50:1, 12.8 ns @ 500:1 Switch positions 500:1, 50:1 Internal power Autoprobe interface

*Denotes warranted specification after 20 minute warm-up

-50 dB @ 100 kHz

-50 dB @ 1 MHz

< 50 mVrms @ 50:1

Input Characteristics

Cable length 170 cm (66.9 inches) Length of input leads 40 cm (15.7 inches) Maximum common mode

operating voltage (rms or DC + peak AC)

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Maximum common mode operating voltage derating frequency

Maximum differential mode operating voltage

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(DC + peak AC)

Refer to the warnings on page 8 for further details on the input voltage safety rating

Refer to the derating plot on page 12

600V CAT III 1000V CAT II

2 MHz

1400 V @ 500:1 140 V @ 50:1

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