Tektronix P6248 Bedienungsanleitung

Instructions

P6248

1.7 GHz (Typical)

Differential Probe

071-0566-03

Tektronix products are covered by U.S. and foreign patents, issued and

pending. Information in this publication supercedes that in all previously

published material. Specifications and price change privileges reserved.

Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077

TEKTRONIX, TEK, and TEKPROBE are registered trademarks of

Tektronix, Inc.

KlipChip, TwinFoot, TwinTip, and VariTip are trademarks of Tektronix, Inc.

WARRANTY

Tektronix warrants that the products that it manufactures and sells will be free from defects

in materials and workmanship for a period of one (1) year from the date of shipment. If a

product proves defective during this warranty period, Tektronix, at its option, either will

repair the defective product without charge for parts and labor, or will provide a

replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect

before the expiration of the warranty period and make suitable arrangements for the

performance of service. Customer shall be responsible for packaging and shipping the

defective product to the service center designated by Tektronix, with shipping charges

prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to

a location within the country in which the Tektronix service center is located. Customer

shall be responsible for paying all shipping charges, duties, taxes, and any other charges for

products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or

improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish

service under this warranty a) to repair damage resulting from attempts by personnel other

than Tektronix representatives to install, repair or service the product; b) to repair damage

resulting from improper use or connection to incompatible equipment; c) to repair any

damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a

product that has been modified or integrated with other products when the effect of such

modification or integration increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER

WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS

DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY

TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND

EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF

THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE

FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR

HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

P6248 1.7 GHz Differential Probe Instructions i

Table of Contents

General Safety Summary iii............................

Preface v............................................

Contacting Tektronix vi.................................

Getting Started 1.....................................

Features and Accessories 1..............................

Installation 8.........................................

Instruments with the TEKPROBE Interface (Tektronix TDS 400,

500, 600, and 700 Series Oscilloscopes) 9...............

Instruments without the TEKPROBE Interface 9............

Operating Basics 11...................................

Input Voltage Limits 11.................................

Maximum Input Voltage 11..............................

Common-Mode Signal Range 11..........................

Differential-Mode Signal Range 12........................

Attenuation Settings 12.................................

Probe Grounding 12....................................

Input Impedance and Probe Loading 14.....................

Common-Mode Rejection 15.............................

Probing Techniques to Maximize CMRR 15.................

Reference 17.........................................

Problems with Single-Ended Measurements 17...............

Differential Measurements 17............................

Common-Mode Rejection Ratio 18........................

Assessing CMRR Error 18...............................

Input Impedance Effects on CMRR 19.....................

Extending the Input Leads 19.............................

Extending the Ground Lead 20............................

Extending the Probe Output 20...........................

Terminating the Probe 20................................

Effect of Extending the Output Cable 21....................

Using the Probe with Other Instruments 21..................

Specifications 23......................................

Warranted Characteristics 23.............................

Typical Characteristics 25...............................

Nominal Characteristics 28..............................

Table of Contents

ii P6248 1.7 GHz Differential Probe Instructions

List of Figures

Figure 1: Input connector of TEKPROBE interface 8......

Figure 2: Using the short ground contact 13...............

Figure 3: Typical probe input model 14...................

Figure 4: Using the input lead accessories to achieve

high CMRR 15.....................................

Figure 5: Using the TwinFoot adapter 16..................

Figure 6: Simplified model of a differential amplifier 18.....

Figure 7: Twisting the Input Leads 20....................

Figure 8: Typical Common-Mode Rejection Ratio

(B1 and B10 attenuation) 26..........................

Figure 9: Typical differential input impedance versus

frequency 26.......................................

Figure 10: Probe head and compensation box dimensions 27.

P6248 1.7 GHz Differential Probe Instructions iii

General Safety Summary

Review the following safety precautions to avoid injury and prevent

damage to this product or any products connected to it. To avoid

potential hazards, use this product only as specified.

Only qualified personnel should perform service procedures.

To Avoid Fire or Personal Injury

Connect and Disconnect Properly. Connect the probe output to the

measurement instrument before connecting the probe to the circuit

under test. Disconnect the probe input and the probe ground from the

circuit under test before disconnecting the probe from the measure-

ment instrument.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all

ratings and markings on the product. Consult the product manual for

further ratings information before making connections to the product.

Connect the ground lead of the probe to earth ground only.

Do Not Operate Without Covers. Do not operate this product with

covers or panels removed.

Do Not Operate With Suspected Failures. If you suspect there is damage

to this product, have it inspected by qualified service personnel.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Safety Terms and Symbols

Terms in This Manual. These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that

could result in injury or loss of life.

General Safety Summary

iv P6248 1.7 GHz Differential Probe Instructions

CAUTION. Caution statements identify conditions or practices that

could result in damage to this product or other property.

Terms on the Product. These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you

read the marking.

WARNING indicates an injury hazard not immediately accessible as

you read the marking.

CAUTION indicates a hazard to property including the product.

Symbols on the Product. These symbols may appear on the product:

CAUTION

Refer to Manual

Protective Ground

(Earth) Terminal

P6248 1.7 GHz Differential Probe Instructions v

Preface

This manual contains instructions and specifications for using the

P6248 differential probe.

Related Manuals

For performance verification procedures, adjustment procedures, a

list of replaceable parts, and other service information, refer to the

P6248 Service Manual (071-0573-XX).

Preface

vi P6248 1.7 GHz Differential Probe Instructions

Contacting Tektronix

Phone 1-800-833-9200*

Address Tektronix, Inc.

Department or name (if known)

14200 SW Karl Braun Drive

P.O. Box 500

Beaverton, OR 97077

USA

Web site www.tektronix.com

Sales

support

1-800-833-9200, select option 1*

Service

support

1-800-833-9200, select option 2*

Technical

support

Email: techsupport@tektronix.com

1-800-833-9200, select option 3*

6:00 a.m. -- 5:00 p.m. Pacific time

*This phone number is toll free in North America. After office

hours, please leave a voice mail message.

Outside North America, contact a Tektronix sales office or

distributor; see the Tektronix web site for a list of offices.

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