Keysight N2805A User's Guide

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Keysight N2804/5A Differential Probes

User’s Guide

Notices

CAUTION

WARNING

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Keysight Technologies, Inc. as governed by United States and international copyright laws.

Manual Part Number

N2804-97000

Edition

First Edition, November 2014

Published in USA

Published by: Keysight Technologies, Inc. 1400 Fountaingrove Parkway Santa Rosa, CA, 95403

Warranty

The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future ed itions. Further, to the maximum extent permitted by applicable law, Keysight disclaims all warranties, either express or implied, with regard to this manual and any information contained herein, incl uding but not l imited to the implied warranties of merchantability and fitness for a particular purpose. Keysight shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein. Should Keysight and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement shall control.

Technology Licenses

The hardware and/or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license.

Restricted Rights Legend

If software is for use in the performance of a U.S. Government prime contract or subcontract, Software is delivered and licensed as “Commercial computer software” as defined in DFAR 252.227-7014 (June 1995), or as a “commercial item” as defined in FAR 2.101(a) or as “Restricted computer software” as defined in FAR 52.227-19 (June 1987) or any equivalent agency regulation or contract clause. Use, duplication or d isclosure of Software is subject to Keysight Technologies’ standard commercial license terms, and non-DOD Departments and Agencies of the U.S. Government will receive no greater than Restricted Rights as defined in FAR

52.227-19(c)(1-2) (June 1987). U.S. Government users will receive no greater than Limited Rights as defined in FAR 52.227-14

(June 1987) or DFAR 252.227-7015 (b)(2) (November 1995), as applicable in any technical data.

Safety Notices

A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met.

A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could resul t in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.

2 N2804/5A Differential Probes User’s Guide

Introduction / 5

Inspecting the Probe / 6 Handling the Probe / 7 Oscilloscope Compatibility / 8 Channel Identification Rings / 9 To Clean the Probe / 9

N2804A Probe and Accessories / 10

N2805A Probe and Accessories / 12

Attaching Probe Accessories / 14

Probe Offset Adjustment / 15

Safety Information / 17

Specifications and Characteristics / 20

N2804A Performance Plots / 23

N2805A Performance Plots / 27

Performance Verification / 31

Performance Tests / 32 Performance Test Record / 34

IEC Measurement Category Definitions / 35

Measurement Category I (CAT I) / 35 Measurement Category II (CAT II) / 35 Measurement Category III (CAT III) / 35 Measurement Category IV (CAT IV) / 35

Returning the Probe for Service / 36

Contacting Keysight Technologies / 37

N2804/5A Differential Probes User’s Guide 3

Contents

Index

4 N2804/5A Differential Probes User’s Guide

Introduction

Keysight N2804/5A Differential Probes

User’s Guide

The N2804A and N2805A differential probes provide superior general-purpose differential signal measurements that are required for high-speed power measurements, vehicle bus measurements, and high-speed digital system designs. Both probes are powered by the oscilloscope’s AutoProbe interface. Both probes are designed for Measurement Category II (CAT II) as described in “IEC

Measurement Category Definitions" on page 35.

The N2804A 300 MHz differential probe offers 100:1 attenuation ratio, allowing it to be used for high voltage signal measurements. The differential probe has an differential input resistance of 4 MW and low input capacitance of 4 pF to minimize circuit loading. The probe comes with a pair of extension leads (30 cm long) with a damping resistor built in to damp out the in-band resonance and provide flat frequency response even with the extension leads and the probe tip accessories used.

The N2805A 200 MHz differential probe is designed to provide superior differential signal measurements especially in environments where extended cable length is required. This is due to the probe’s 5m long cable length.

Table 1 Quick Probe Comparison

Bandwidth 300 MHz 200 MHz

Attenuation Ratio 100:1 50:1

Differential Input Loading 4 M

Maximum Differential Input \300V (DC + peak AC) and ±200 V

Probe Cable Length 1.2 m 5 m

* Refer to “Specifications and Characteristics" on page 20 for the complete specifications.

N2804A N2805A

W ǁ 4 pF 4 MW ǁ 4 pF

rms

\100V (DC + peak AC) and ±100 V

rms

Introduction

Inspecting the Probe

Figure 1 Probes (Accessories Not Shown)

• Inspect the shipping container for damage. Keep the 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.

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

• Inspect the probe. If there is mechanical damage or defect, or if the probe does not operate properly or pass calibration tests, notify your 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’ option without waiting for claim settlement.

6 N2804/5A Differential Probes User’s Guide

Handling the Probe

CAUTION

Handle the probe with care and refer to the safety notices in this manual. 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. You should also avoid any mechanical shocks to this product in order to guarantee accurate performance and protection.

Always wear an ESD wrist strap when working with active probes. Not doing so can result in the probe becoming permanently damaged.

Observe all of the product limits noted on the products labels and listed in “Safety

Information" on page 17 and “Specifications and Characteristics" on page 20.

Introduction

N2804/5A Differential Probes User’s Guide 7

Figure 2 N2805A Product Labels

Figure 3 N2804A Product Labels

Introduction

NOTE

Oscilloscope Compatibility

The N2804A and N2805A probes are compatible with the Keysight oscilloscopes shown in Table 2. Up to four probes can be connected to the oscilloscope at the same time. The table also lists the minimum required firmware version for the oscilloscope.

Is Your Oscilloscope Software Up-to-Date? Keysight periodically releases software updates to support your probe, fix known defects, and incorporate product enhancements. To download the latest firmware, go to www.keysight.com, locate the Technical Support page, and search by your oscilloscope model number.

The N2804A and N2805A probes are designed for oscilloscopes with 50W AutoProbe-interface channel inputs. The AutoProbe interface provides the power to the probe.

Table 2 Compatible Oscilloscopes and Support

Required

Oscilloscope

Infiniium Oscilloscopes

Firmware Version Adapter Required

90000 Q-Series ¡ 5.20 N5442A

90000 X-Series ¡ 5.20 N5442A

90000A ¡ 5.20 —

9000A/H-Series ¡ 5.20 —

S-Series ¡ 5.20 —

InfiniiVision Oscilloscopes

4000 X-Series ¡ 4.00 —

3000 X-Series ¡ 2.38 —

8 N2804/5A Differential Probes User’s Guide

Channel Identification Rings

When multiple probes are connected to the oscilloscope, use the channel identification rings to associate the channel inputs with each probe. Place one colored ring near the probe’s channel connector and place an identical color ring near the probe head. The channel identifications rings are shown in “N2804A in

Case" on page 10 and “N2805A in Case" on page 12.

To Clean the Probe

Disconnect the probe from the oscilloscope and clean the probe with a soft cloth dampened with a mild soap and water solution. Make sure that the probe is completely dry before reconnecting it to an oscilloscope. Avoid using abrasive cleaners and chemicals containing benzene or similar solvents.

Introduction

N2804/5A Differential Probes User’s Guide 9

N2804A Probe and Accessories

WARNING

N2804A Probe and Accessories

Figure 4 shows the N2804A probe with accessories in the product case. A

description of each accessory is provided in Tab le 3 on page 11. These accessories are not compatible with N2805A probes. Replacements can be ordered with the N2816A replacement kit. The quantity for each accessory in the kit is the same as listed in the table and originally provided with the probe.

For IEC Category definitions, refer to “IEC Measurement Category Definitions" on page 35.

The measurement category of a combination of a PROBE ASSEMBLY and an accessory is the lower of the measurement categories of the PROBE ASSEMBLY and of the accessory.

10 N2804/5A Differential Probes User’s Guide

Figure 4 N2804A in Case

N2804A Probe and Accessories

Table 3 N2804A Accessories Supplied With Probe (Order N2816A for Replacement Accessories)

Accessory Description

Alligator Clips (1 red and 1 black) Rating: 600V, 10A (CAT III) BW: 300 MHz

Pincer Clips (1 red and 1 black) Rating: 300V, 1A (CAT II) BW: 300 MHz

Extension Leads (1 red and 1 black) Approximately 30 cm length BW: 120 MHz

Probe Offset Adjustment Tool (Qty. 1)

N2804/5A Differential Probes User’s Guide 11

N2805A Probe and Accessories

WARNING

N2805A Probe and Accessories

Figure 5 shows the N2805A probe with accessories in the product case. A

description of each accessory is provided in Tab le 4 on page 13. These accessories are not compatible with N2804A probes. Replacements can be ordered with the N2817A replacement kit. The quantity for each accessory in the kit is the same as listed in the table and originally provided with the probe.

For IEC Category definitions, refer to “IEC Measurement Category Definitions" on page 35.

The measurement category of a combination of a PROBE ASSEMBLY and an accessory is the lower of the measurement categories of the PROBE ASSEMBLY and of the accessory.

12 N2804/5A Differential Probes User’s Guide

Figure 5 N2805A in Case

N2805A Probe and Accessories

Table 4 N2805A Accessories Supplied With Probe (Order N2817A for Replacement Accessories)

Accessory Description

Alligator Clips (1 red and 1 black) Rating: 300V, 10A (CAT II) BW: 200 MHz

Hook Clips (1 red and 1 black) Rating: 1000V, 3A (CAT III) BW: 200 MHz

Pincer Clips (1 red and 1 black) Rating: 1000V, 5A (CAT III) BW: 100 MHz

Browser Leads (1 red and 1 black) Rating: 1000V, 10A (CAT III) BW: 200 MHz

Probe Offset Adjustment Tool (Qty. 1)

N2804/5A Differential Probes User’s Guide 13

Attaching Probe Accessories

WARNING

CAUTION

N2804A

300 MHz Dierential Probe Terminate wit h 50 Ω

300V (Peak,

200V rms)

CAT II

N2805A

200 MHz Dierential Probe Terminate wit h 50 Ω

200V (Peak,

rms)

CAT II

N2805A

Attaching Probe Accessories

Before you can use the probe, gently push one of the supplied accessory tips onto the probe leads as shown in Figure 6. For N2804A probes, extension leads can be inserted between the tip and probe leads.

Must be Grounded. Before making connections to the input leads of this probe, ensure that the probe’s output connector is attached to the channel input of the oscilloscope and the oscilloscope is properly grounded.

To protect against electrical shock, use only the accessories supplied with this probe or in the accessory kit.

This probe is to carry out differential measurements between two points on the circuit under test. This probe is not for electrically insulating the circuit under test and the measuring instrument.

N2804A

14 N2804/5A Differential Probes User’s Guide

Figure 6 Attaching an Accessory Tip

Probe Offset Adjustment

NOTE

The N2804A/N2805A differential probes can be adjusted for zeroing out the probe's offset voltage using the trimmer tool supplied with the probe. Follow the procedure shown below to perform the offset zero calibration.

Allow the oscilloscope and probe to warm up for 20 minutes before performing the adjustment.

1 Connect the probe to an oscilloscope channel input. Turn on the oscilloscope and

wait 20 minutes to allow the oscilloscope and probe to warm up.

2 If the oscilloscope needs calibration, perform a user calibration before the probe

calibration.

3 Using the probe’s hook tips, short the + and - probe inputs together as shown in

Figure 7.

Probe Offset Adjustment

Figure 7 Adjusting the Offset Using the Supplied Tool

4 Press Default setup and AutoScale of the oscilloscope.

5 Press the channel button for the probe, and set the oscilloscope channel to DC

coupled mode.

N2804/5A Differential Probes User’s Guide 15

Probe Offset Adjustment

6 Set the oscilloscope to Averaging mode (x8 or higher) to reduce oscilloscope

7 Set the vertical scale of the oscilloscope to 100 mV/div (for N2804A) and

8 Using the offset adjustment tool that comes with the probe, adjust the probe

noise.

50 mV/div (for N2805A).

offset voltage to zero volts.

16 N2804/5A Differential Probes User’s Guide

Safety Information

WARNING

This manual provides information and warnings essential for operating this probe in a safe manner and for maintaining it in safe operating condition. Before using this equipment and to ensure safe operation and to obtain maximum performance from the probe, carefully read and observe the following warnings, cautions, and notes.

This product has been designed and tested in accordance with accepted industry standards, and has been supplied in a safe condition. The documentation contains information and warnings that must be followed by the user to ensure safe operation and to maintain the product in a safe condition.

Note the external markings on the probe that are described in this document.

To avoid personal injury and 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 probe assembly in a manner not specified, the protection this product provides may be impaired.

Observe Maximum Working Voltage. To avoid injury, do not use the N2804A probe above ±300V between each input lead and earth or ±300V between the two input leads. Refer to “Specifications and Characteristics" on page 20 for more information.

Safety Information

N2804/5A Differential Probes User’s Guide 17

Observe Maximum Working Voltage. To avoid injury, do not use the N2805A probe above ±500V between each input lead and earth or ±100V between the two input leads. Refer to “Specifications and Characteristics" on page 20 for more information.

Must be Grounded. Before making connections to the input leads of this probe, ensure that the probe is connected to the oscilloscope’s channel input and the oscilloscope is properly grounded.

The measurement category of a combination of a PROBE ASSEMBLY and an accessory is the lower of the measurement categories of the PROBE ASSEMBLY and of the accessory.

Do Not Operate Without Covers. To avoid electrical shock or fire hazard, do not operate this probe with the covers removed.

Safety Information

WARNING

CAUTION

Do Not Operate in Wet / Damp Cond itions. To avoid electrical shock, do not operate this probe in wet or damp cond itions.

Do Not Operate in an Explosive Atmosphere. To avoid injury or fire hazard, do not operate this probe in an explosive atmosphere.

Avoid Exposed Circuit. To avoid injury, remove jewelry such as rings, watches, and other metallic objects. Do not touch exposed connections and components when power is present.

For Indoor Use Only. Only use this probe indoors.

Do Not Operate With Suspected Failures. If you suspect there is damage to this probe, have it inspected by a qualified service personnel.

Connect and Disconnect 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.

18 N2804/5A Differential Probes User’s Guide

Do not use a probe which is cracked, damaged or has defective leads.

Do not install substitute parts or perform any unauthorized modification to the probe.

Do not use the probe or oscilloscope in a manner not specified by the manufacturer.

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 this product in order to guarantee accurate performance and protection.

Safety Information

WARNING

Concerning the Oscilloscope or Voltage Measuring Instrument to Which the Probe is Connected

Whenever it is likely that the ground protection is impaired, you must make the instrument inoperative and secure it against any unintended operation.

If you energize the instrument by an auto transformer (for voltage reduction or mains isolation), the ground pin of the input connector terminal must be connected to the earth terminal of the power source.

Before turning on the instrument, you must connect the protective earth terminal of the instrument to the protective conductor of the (mains) power cord. The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. You must not negate the protective action by using an extension cord (power cable) without a protective conductor (grounding). Ground ing one cond uctor of a two-conductor outlet is not sufficient protection.

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuse holders. To do so could cause a shock or fire hazard.

N2804/5A Differential Probes User’s Guide 19

Capacitors inside the instrument may retain a charge even if the instrument is disconnected from its source of supply.

Specifications and Characteristics

The following tables list the characteristics for the N2804A and N2805A differential probes. Bandwidth and DC gain accuracy are the only warranted specifications. Connect the probe to a powered-on oscilloscope for at least 20 minutes before any testing to allow the probe to warm up. Ensure that the environmental conditions do not exceed the probe’s specified limits.

Table 5 N2804/5A Safety and Regulatory Information

Description

CEI/IEC 61010-031 CAT II

This symbol indicates the Environmental Protection Use Period (EPUP) for the product’s toxic substances for the China RoHS requirements.

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 ind icates product compliance with the Canadian Interference-Causing Equipment Standard.

This product complies with the WEEE Directive (2002/96/EC) marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as a “Monitoring and Control instrumentation” product. Do not dispose in domestic household. To return unwanted products, contact your local Agilent office, or refer to www.agilent.com for more information.

Table 6 Environmental Specifications

Description Specification

Temperature Operating: –10 °C to +40 °C

Non-operating: –30 °C to +70 °C

Altitude Operating: 3,000 m (9,842 feet)

Non-operating: 15,300 m (50,196 feet)

Humidity Operating: 25 – 85% room humidity

Non-operating: 25 – 85% room humidity

Pollution Degree Pollution Degree 2

20 N2804/5A Differential Probes User’s Guide

Table 7 Electrical Specifications and Characteristics

Specifications and Characteristics

Description

Bandwidth

† ‡

(–3 dB) 300 MHz (without extension leads)

N2804A N2805A

200 MHz

120 MHz (with extension leads)

DC Gain Accuracy

†

±1% ±1%

Rise Time (10% – 90%) 1.167 ns 1.75 ns

Attenuation 100:1 50:1

Input Impedance

Each Side to Ground: 2 MW ǁ 8 pF 2 MW ǁ 8 pF

Between Inputs: 4 MW ǁ 4 pF 4 MW ǁ 4 pF

Maximum Differential Input

±300V (DC + peak AC) and ±200 V

rms

±100V (DC + peak AC) and ±100 V

Voltage

Maximum Common Mode Input Voltage

Absolute Maximum voltage (each side to ground)

±300V (DC + peak AC) and 200 V

rms

±1000V (DC + peak AC) and 1000 V

±300V (DC + peak AC) and 200 V

rms

±1000V (DC + peak AC) and 1000 V

CATII

CATI

rms

CATII

CATI

rms

±200V (DC + peak AC) and 200 V ±500V (DC + peak AC) and 500 V

±300V (DC + peak AC) and 200 V ±500V (DC + peak AC) and 500 V

Output Termination 50W AutoProbe interface 50W AutoProbe interface

Output Offset < \2 mV (adjustable) < \2 mV (adjustable)

Offset Adjustable Range –80 mV to +80 mV or larger –80 mV to +80 mV or larger

rms rms

rms

CATII CATI

CMRR –80 dB at 60 Hz

–50 dB at 10 MHz

Noise Referenced to Probe Input 90 mV

rms

–80 dB at 60 Hz –50 dB at 10 MHz

30 mV

rms

Power Requirements AutoProbe Interface AutoProbe Interface

* All entries are typical unless otherwise noted. † Warranted specification ‡ Calculated 0.35/Tr

N2804/5A Differential Probes User’s Guide 21

Specifications and Characteristics

Table 8 Mechanical Characteristics

Description N2804A N2805A

Approximate Weight

Not Including Accessories 170g (6 oz) 160g (5.64 oz)

Including Accessories 1.01 kg (35.6 oz) 1.83 kg (64.6 oz)

BNC Cable Length 1.2 m (47 inches) 5 m (197 inches)

Length of Input Leads 39 cm (15.4 inches) with extension leads

12 cm (4.7 inches) without extension leads

Housing Dimensions (L x W x H)

350 mm x 270 mm x 80 mm (13.8 in x 10.6 in x 3.15 in)

16.5 cm (6.5 inches)

410 mm x 365 mm x 65 mm (16.1 in x 14.4 in x 2.56 in)

22 N2804/5A Differential Probes User’s Guide

N2804A Performance Plots

Figure 8 N2804A Derating Curve

N2804/5A Differential Probes User’s Guide 23

N2804A Performance Plots

Figure 9 N2804A Frequency Response

Figure 10 N2804A Frequency Response when Inputs Driven in Common Mode (CMRR)

24 N2804/5A Differential Probes User’s Guide

Figure 11 N2804A Input Impedance (Between Inputs, Actual)

N2804A Performance Plots

Figure 12 N2804A Input Impedance (Between Inputs, Simulated)

N2804/5A Differential Probes User’s Guide 25

N2804A Performance Plots

Figure 13 N2804A Normalized Differential Step Response (50W)

26 N2804/5A Differential Probes User’s Guide

N2805A Performance Plots

Figure 14 N2805A Derating Curve

N2804/5A Differential Probes User’s Guide 27

N2805A Performance Plots

Figure 15 N2805A Frequency Response

Figure 16 N2805A Frequency Response when Inputs Driven in Common Mode (CMRR)

28 N2804/5A Differential Probes User’s Guide

Figure 17 N2805A Input Impedance (Between Inputs, Actual)

N2805A Performance Plots

Figure 18 N2805A Input Impedance (Between Inputs, Simulated)

N2804/5A Differential Probes User’s Guide 29

N2805A Performance Plots

Figure 19 N2805A Normalized Differential Step Response (50W)

30 N2804/5A Differential Probes User’s Guide

Performance Verification

NOTE

The following procedure can be used to test the N2804A or N2805A probe’s DC differential gain accuracy and bandwidth, which are warranted specifications.

The recommended test interval is 1 year.

Table 9 Required Test Equipment

Performance Verification

Description Critical Specifications Recommended Model Part

Number

Digitizing Oscilloscope Bandwidth: >200 MHz

W/50W selectable input

1 M

Signal Generator Precision DC voltage source

BNC Adapter BNC (f) to Dual Banana (m) Adapter Keysight 1251-2277 Interconnection

W BNC Feed Through

50 Adapter

Amplitude accuracy: less than or equal to 0.25%

W / 50W selectable load

1 M Sine wave greater than or equal to 200 MHz

50W precision feed through terminator

Keysight DSOS204A Display probe output

Fluke 9500B High Performance Oscilloscope Calibrator or Keysight E8257D+1EU option

Keysight 0960-0301 Termination between

Functions

Signal source for DC gain and bandwidth

between probe and generator

probe and calibrator for bandwidth verification

N2804/5A Differential Probes User’s Guide 31

Performance Verification

Performance Tests

1 Configure the oscilloscope to the following settings:

2 On the 9500B calibrator, configure CH2 to the following settings:

3 On the 9500B, connect the CH2 active head to channel 2 on the oscilloscope.

4 On the 9500B, set CH1 to the following settings and enable the output:

5 On the oscilloscope, select the amplitude measurement and record the square

Amplitude Scale (Channel 1): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mV/div

Amplitude Scale (Channel 2):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mV/div

Time Scale: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 μs/div

Acquisition mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 averages

Input impedance: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50W.

Trigger: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 2

Type: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRIGGER

Load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50W

Connect the CH1 active head to channel 1 on the oscilloscope

Waveform:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . square wave

Load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 MW

Amplitude:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1V pk-pk

Frequency:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz

wave’s DC amplitude (approximately 100 mV):

: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ____________ mV

cal

DC Differential Gain

6 Disable the 9500B’s output and disconnect the active head from channel 1 of the

oscilloscope.

7 Connect the probe’s output to channel 1 of the oscilloscope.

8 Attach the BNC adapter to the 9500B’s CH1 active head.

9 Attach the differential probe input leads by clipping the alligator clamp to the BNC

adapter banana post.

10 On the 9500B, change the CH1 amplitude setting to:

N2804A: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10V pk-pk

N2805A: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V pk-pk

11 Enable the output of the calibrator.

32 N2804/5A Differential Probes User’s Guide

Performance Verification

Probe Gain Accuracy (%)

probe outVcal

–

cal

----------------------------------------

100×=

12 On the oscilloscope, note the measured DC amplitude for the square wave input to

the probe. For N2804A probes, divide this value by 100 and record the voltage below as the probe’s output (V

probe out

). For N2805A probes, divide the measured

value by 50.

probe out

:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ____________ mV

13 Calculate the probe gain accuracy. Vcal was recorded in step 5 and V

probe out

was

recorded in step 12.

14 Verify that the probe gain accuracy is ±1% + scope gain accuracy. Record the test

results as DC Differential Gain Accuracy in Table 10 on page 34.

Bandwidth

15 Disable the 9500B’s output.

16 Connect the 50W BNC feed through adapter to the N9500B’s CH1 active head.

17 Attach the BNC (f)-to-banana post adapter to the BNC feed through adapter.

18 Attach the differential probe input leads by clipping the alligator clamp to the BNC

adapter banana post.

19 Enable the 9500B’s output.

20 Configure the oscilloscope to the following settings:

Amplitude Scale (Channel 1):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mV/div

Time Scale: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ns/div

Acquisition mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Peak Detect

21 Center the trace on the oscilloscope.

22 On the 9500B, configure CH1 to the following settings:

Waveform:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sine wave

Load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 MW

Amplitude:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3V pk-pk

Frequency (N2804A): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 MHz

Frequency (N2805A): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 MHz

N2804/5A Differential Probes User’s Guide 33

Performance Verification

23 Measure the peak-to-peak amplitude on the oscilloscope. It should be greater

than or equal to 210 mV – scope vertical accuracy. Record the test results as Bandwidth in Table 10 on page 34.

24 Disable the 9500B’s output and disconnect the probe input.

Performance Test Record

Serial Number: Certification Date: Certification Temperature: Tested By:

Table 10 N2804A Performance Test Record

Test Test Limits Test Results

DC Differential Gain Accuracy

Bandwidth ¡ (210 mV – scope vertical accuracy)

±1% (99 mV – scope vertical accuracy to 101 mV + scope vertical accuracy)

34 N2804/5A Differential Probes User’s Guide

IEC Measurement Category Definitions

Definitions and Examples (Clause 6.5.2).

Measurement Category I (CAT I)

Measurement category I is for measurements performed on circuits not directly connected to a mains supply. For example, measurements in circuits not derived from a mains supply and specially protected (internal) circuits derived from a mains supply. In the latter case, transient stresses are variable. For that reason, it is required that the transient withstand capability of the equipment is made known to the user.

Measurement Category II (CAT II)

Measurement category II is for measurements performed on circuits directly connected to the low voltage installation. For example, household appliances, portable tools, and similar equipment.

Measurement Category III (CAT III)

IEC Measurement Category Definitions

Measurement category III is for measurements performed in the building installation. For example, measurements on distribution boards, circuit breakers, wiring including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation and equipment for industrial use like, for example, stationary motors with permanent connections to the fixed installation.

Measurement Category IV (CAT IV)

Measurement category IV is for measurements performed at the source of the low-voltage installation. For example, electricity meters and measurements on primary over-current protection devices and ripple control units.

N2804/5A Differential Probes User’s Guide 35

Returning the Probe for Service

NOTE

Returning the Probe for Service

If the probe is found to be defective we recommend sending it to an authorized service center for all repair and calibration needs. Perform the following steps before shipping the probe back to Keysight Technologies for service.

1 Contact your nearest Agilent 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.

• Name and address of owner

• Product model number (for example, N2804A)

• Product Serial Number (for example, MYXXXXXXXX)

Figure 20 Location of Serial Number Label

• Description of failure or service required.

Include probing and browsing heads if you feel the probe is not meeting performance specifications or a yearly calibration is requested.

3 Protect the probe by wrapping in plastic or heavy paper.

4 Pack the probe in the original carrying case or if not available use bubble wrap or

packing peanuts.

5 Place securely in sealed shipping container and mark container as "FRAGILE".

If any correspondence is required, refer to the product by serial number and model number.

36 N2804/5A Differential Probes User’s Guide

Contacting Keysight Technologies

For technical assistance, contact your local Keysight Call Center.

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

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

• Before returning an instrument for service, you must first call the Call Center at 1 (800) 829-4444.

Returning the Probe for Service

N2804/5A Differential Probes User’s Guide 37

Returning the Probe for Service

38 N2804/5A Differential Probes User’s Guide

Index

accessories

N2804A, 10

N2805A, 12 alligator clips, 11, 13 altitude, 20

bandwidth, 21 browser leads, 13

care, probe, 7 CE mark, 20 channel identification rings, 9 characteristics, 20 cleaning, 9 compatible oscilloscopes, 8

electrical specifications, 21 Environmental, 20 environmental specifications, 20 ESD, 7 extension leads, N2804A, 11

grounding probe, 14

hook clips, 13 humidity, 20

Infiniium oscilloscope, 8

InfiniiVision oscilloscope, 8 input resistance, 21 inspecting, 6

Keysight Technologies, contacting, 37

labels, 7

measurement category, 10, 12, 20 mechanical characteristics, 22

Offset Adjust, 15 oscilloscope

compatibility, 8 Infiniium, 8 InfiniiVision, 8

performance plots

N2804A, 23

N2805A, 27 performance verification, 31 pincer clips, 11, 13 probe

cable care, 7

cleaning, 9

grounding, 14

inspecting, 6

offset adjust, 15

service, 36 product labels, 7

repair, 36 replacement kit

for N2804A, 10 for N2805A, 12

returning for service, 36

safety, 17 Safety Considerations, 17 safety specifications, 20 safety warnings, 17 service, 36

temperature, 20 test interval, recommended, 31

WEEE Directive, 20

N2804/5A Differential Probes User’s Guide 39

Index

40 N2804/5A Differential Probes User’s Guide

Keysight N2805A User's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Introduction

Inspecting the Probe

Handling the Probe

Oscilloscope Compatibility

Channel Identification Rings

To Clean the Probe

N2804A Probe and Accessories

N2805A Probe and Accessories

Attaching Probe Accessories

Probe Offset Adjustment

Safety Information

Specifications and Characteristics

N2804A Performance Plots

N2805A Performance Plots

Performance Verification

Performance Tests

Performance Test Record

IEC Measurement Category Definitions

Measurement Category I (CAT I)

Measurement Category II (CAT II)

Measurement Category III (CAT III)

Measurement Category IV (CAT IV)

Returning the Probe for Service

Contacting Keysight Technologies

Index