Keysight Technologies E2655C Manuel utilisateur

Keysight E2655C Probe

Deskew and Performance

Verification Kit

User Guide

2E2655C Probe Deskew and Performance Verification Kit User’s Guide

Notices

2016

No part of this manual may be reproduced in

any form or by any means (including elec-

tronic storage and retrieval or translation

into a foreign language) without prior agree-

ment and written consent from Keysight

Technologies as governed by United States

and international copyright laws.

Manual Part Number

E2655-92004

Edition

Fifth Edition, August 2016

Available in electronic format only

Keysight Technologies

1900 Garden of the Gods Road

Colorado Springs, CO 80907 USA

Warranty

THE MATERIAL CONTAINED IN THIS DOCU-

MENT IS PROVIDED "AS IS," AND IS SUB-

JECT TO BEING CHANGED, WITHOUT

NOTICE, IN FUTURE EDITIONS. 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, INCLUDING BUT NOT LIMITED TO

THE IMPLIED WARRANTIES OF MERCHANT-

ABILITY AND FITNESS FOR A PARTICULAR

PURPOSE. KEYSIGHT SHALL NOT BE LIABLE

FOR ERRORS OR FOR INCIDENTAL OR CON-

SEQUENTIAL DAMAGES IN CONNECTION

WITH THE FURNISHING, USE, OR PERFOR-

MANCE OF THIS DOCUMENT OR ANY

INFORMATION CONTAINED HEREIN.

SHOULD KEYSIGHT AND THE USER HAVE A

SEPARATE WRITTEN AGREEMENT WITH

WARRANTY TERMS COVERING THE MATE-

RIAL IN THIS DOCUMENT THAT CONFLICT

WITH THESE TERMS, THE WARRANTY

TERMS IN THE SEPARATE AGREEMENT WILL

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 accor-

dance with the terms of such license.

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Regulation ("FAR") 2.101. Pursuant to FAR

12.212 and 27.405-3 and Department of

Defense FAR Supplement ("DFARS")

227.7202, the U.S. government acquires

commercial computer software under the

same terms by which the software is cus-

tomarily provided to the public. Accordingly,

Keysight provides the Software to U.S. gov-

ernment customers under its standard com-

mercial license, which is embodied in its

End User License Agreement (EULA), a copy

of which can be found at http://www.key-

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forth in the EULA represents the exclusive

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therein, does not require or permit, among

other things, that Keysight: (1) Furnish tech-

nical information related to commercial

computer software or commercial computer

software documentation that is not custom-

arily provided to the public; or (2) Relinquish

to, or otherwise provide, the government

rights in excess of these rights customarily

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commercial computer software or commer-

cial computer software documentation. No

additional government requirements beyond

those set forth in the EULA shall apply,

except to the extent that those terms, rights,

or licenses are explicitly required from all

providers of commercial computer software

pursuant to the FAR and the DFARS and are

set forth specifically in writing elsewhere in

the EULA. Keysight shall be under no obliga-

tion to update, revise or otherwise modify

the Software. With respect to any technical

data as defined by FAR 2.101, pursuant to

FAR 12.211 and 27.404.2 and DFARS

227.7102, the U.S. government acquires no

greater than Limited Rights as defined in

FAR 27.401 or DFAR 227.7103-5 (c), as

applicable in any technical data.

Safety Notices

CAUTION

A CAUTION notice denotes a hazard. It

calls attention to an operating proce-

dure, 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 pro-

ceed beyond a CAUTION notice until

the indicated conditions are fully

understood and met.

WARNING

A WARNING notice denotes a hazard.

It calls attention to an operating pro-

cedure, practice, or the like that, if not

correctly performed or adhered to,

could result in personal injury or

death. Do not proceed beyond a

WARNING notice until the indicated

conditions are fully understood and

met.

E2655C Probe Deskew and Performance Verification Kit User’s Guide 3

4E2655C Probe Deskew and Performance Verification Kit User’s Guide

Introduction

Calibration for the Solder-in and Socketed Probe Heads 7

Calibration for Hand-held Browser Probe Heads 14

Calibrating the InfiniiMax probes (1168B, 1169B, 1130B, 1131B, 1132B, 1134B)

and the InfiniiMode differential probes (N2750A, N2751A, N2752A) is done using

the E2655C Probe Deskew and Performance Verification Kit. The kit contains the

following parts:

• SMA (male) to SMA (male) adapter

• SMA (male) to BNC (female) adapter

• BNC (male) to SMA (male) adapter

• 50 ΩSMA Terminator

• De-skew Fixture

Figure 1 E2655C Probe Deskew and Performance Verification Kit

6E2655C Probe Deskew and Performance Verification Kit User’s Guide

This document contains procedures showing vertical and skew calibration for the

InfiniiMax (1160B series and 1130B series probes) solder-in differential probe head

and the differential browser probe head. However, the procedures also apply to all

of the different InfiniiMax probe configurations.

For use with the probe calibration and verifications, we highly recommend using

the N2787A 3D probe positioner.

E2655C Probe Deskew and Performance Verification Kit User’s Guide 7

Calibration for the Solder-in and Socketed Probe Heads

Calibration of the solder-in and socketed probe heads consists of a vertical

calibration and a skew calibration. The vertical calibration should be performed

before the skew calibration. Both calibrations should be performed for best probe

measurement performance.

Connecting the Probe for Calibration

The calibration procedure requires the following parts.

• BNC (male) to SMA (male) adapter

•Deskewfixture

• 50 ΩSMA terminator

For the following procedure, refer to Figure 2.

1Connect BNC (male) to SMA (male) adapter to the deskew fixture on the

connector closest to the pincher.

2Connect the 50 ΩSMA terminator to the connector farthest from the pincher.

3Connect the BNC side of the deskew fixture to the Aux Out BNC of the Infiniium

oscilloscope.

4Connect the probe to an oscilloscope channel.

5To minimize the wear and tear on the probe head, the probe head should be

placed on a support to relieve the strain on the probe head cables.

6Push down on the back side of the pincher. Insert the probe head resistor lead

underneath the center of the pincher and over the center conductor of the

deskew fixture. The negative probe head resistor lead or ground lead must be

underneath the pincher and over one of the outside copper conductors

(ground) of the deskew fixture. Make sure that the probe head is approximately

perpendicular to the deskew fixture.

7Release the pincher.

NOTE

Before calibrating the probe, verify that the Infiniium oscilloscope has been calibrated recently

and that the calibration Δtemperature is within ±5 °C. If this is not the case, calibrate the

oscilloscope before calibrating the probe. This information is found in the Infiniium Calibration

dialog box.

NOTE

For the socketed probe head, insert two properly trimmed 82 Ωresistors into the sockets.

8E2655C Probe Deskew and Performance Verification Kit User’s Guide

NOTE

To ensure contact, pull up on the back side of the pincher to ensure good contact between

resistor leads and the deskew fixture.

Figure 2 Connecting the Probe for Calibration

BNC to SMA Connector

nfiniiMax Probe

Pincher

Deskew Fixture

50 W SMA Terminator

E2655C Probe Deskew and Performance Verification Kit User’s Guide 9

Verifying the Connection

1On the Infiniium oscilloscope, press the [Auto Scale] key on the front panel.

2Set the volts per division to 100 mV/div.

3Set the horizontal scale to 1.00 ns/div.

4Set the horizontal position to approximately 3ns. You should see a waveform

similar to that in Figure 3.

If you see a waveform similar to that of Figure 4 then you have a bad connection

and should check all of your probe connections.

Figure 3 Good Connection

10 E2655C Probe Deskew and Performance Verification Kit User’s Guide

Running the Probe Calibration and Deskew

1On the Infiniium oscilloscope in the Setup menu, select the channel connected

to the probe.

2In the Channel Setup dialog box, select the Probe Config... button.

3Select the Probe head model from the drop-down menu.

4In the Probe Configuration dialog box, select the Calibrate Probe... button.

5In the Probe Calibration dialog box, select the Start Atten/Offset Calibration...

button and follow the on-screen instructions for the vertical calibration

procedure.

6Once the vertical calibration has successfully completed, select the Start Skew

Calibration... button and follow the on-screen instructions for the skew

calibration.

At the end of each calibration the oscilloscope will inform you if the calibration

was or was not successful.

Figure 4 Bad Connection

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