Tektronix P7240 Service Manual

Service Manual

P7240 4 GHz
Active Probe

071-1056-00

Warning

The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.

www.tektronix.com

*P071105600*

071105600

Copyright © Tektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and
are protected by United States copyright laws and international treaty provisions.

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in T echnical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software – Restricted Rights clause at F AR 52.227-19, as applicable.

T ektronix 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.

T ektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX, TEK, T ekConnect, and KlipChip are registered trademarks of Tektronix, Inc.

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.

Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.

While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.

To Avoid Fire or
Personal Injury

Connect and Disconnect Properly . Do not connect or disconnect probes or test

leads while they are connected to a voltage source.
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.

Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.

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 .
Provide Proper Ventilation. Refer to the manual’s installation instructions for

details on installing the product so it has proper ventilation.

P7240 4 GHz Active Probe Service Manual

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General Safety Summary

Symbols and Terms

T erms 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.

CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.

T erms 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. The following symbols may appear on the product:

CAUTION

Refer to Manual

WARNING

High Voltage

Double

Insulated

Protective Ground

(Earth) Terminal

Not suitable for

connection to

the public telecom-

munications network

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P7240 4 GHz Active Probe Service Manual

Preface

Manual Structure

Related Documentation

This is the service manual for the P7240 4 GHz Active Probe. Read this preface
to learn how this manual is structured and where you can find other information
related to servicing this product.

This manual contains three sections – Description, Performance Verification,
and Adjustment Procedures, and is intended to be used by qualified service
personnel. Replaceable parts are limited to accessories and adapters, and are
described in the Instruction Manual that is shipped with the probe.

Be sure to read the introductions to all procedures. These introductions provide
important information needed to do the service correctly, safely, and efficiently.

The probe is shipped with the following manual:

H

P7240 4 GHz Active Probe Instruction Manual. Tektronix part number
071-0759-XX.

P7240 4 GHz Active Probe Service Manual

iii

Preface

Contacting Tektronix

Phone [phone]*

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: [e-mail]

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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P7240 4 GHz Active Probe Service Manual

Description

This document describes the Performance Verification and Adjustment Proce-
dures for the P7240 4 GHz Probe. There are no user-replaceable parts inside the

probe. If the probe fails the performance verification procedure, and adjusting the
probe cannot compensate for the failure, contact your Tektronix service center.

Performance Verification

Use the performance verification procedures to verify the warranted specifica­tions of the P7240 probe. The recommended calibration interval is one year. No
software is required to complete a performance verification of the probe.

The performance verification procedures check the following specifications:

H

H

H

Output zero
DC attenuation accuracy
Rise time

Adjustments

The P7240 probe has two electronically-adjusted controls that rarely need
adjusting unless a performance verification yields a specification that is out of
tolerance, or the probe fails an oscilloscope probe calibration utility.

If you must make adjustments to the probe, you need the TekConnect Adjust­ment Software for the P7240 4 GHz Probe. Refer to Equipment Setup in the
Adjustment Procedures, step 7, for instructions on finding and loading the
adjustment software on your instrument.

The adjustment procedures describe the following adjustments for the probe:

H

Offset zero

H

Offset gain

P7240 4 GHz Active Probe Service Manual

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Description

Equipment Required

Refer to Table 1 for the equipment required to perform the service procedures.

T able 1: Equipment required for performance verification and adjustment procedures

Item description Performance requirement Recommended example

T ekConnect adjustment software

Sampling Oscilloscope ≥12.5 GHz bandwidth T ektronix TDS8000
Sampling head, with extension cable ≥12.5 GHz bandwidth Tektronix 80E0X with 012-1568-00 cable
Oscilloscope T ekConnect Interface T ektronix TDS7404
T ekConnect calibration adapter T ekConnect Interface 067-0422-00
Calibration Step Generator 250 mV step, ≤30ps rise time 067-1338-0X
Adapter TekConnect-to-SMA TCA-SMA
Adapter Probe tip with 50Wterminator 015-0678-00
DC Power Supply 1 VDC at 1 mA T ektronix PS280
DMM (2) with leads 0.05% accuracy, 0.1mV resolution Fluke 87 or equivalent
Feedthrough T ermination 50W ±0.05
BNC-to-BNC coaxial cable (2) 50W coaxial cable 012-0057-01
Coaxial cable Male-to-Male SMA 012-0649-00
Adapter SMA Male-to-Male 015-101 1-00
Adapter SMA Female-to-Female 015-1012-00
Adapter SMA Male-to-BNC Female 015-0554-00
Adapter (2) BNC Female-to-Dual Banana 103-0090-00
Adapter Y -lead adapter 196-3456-00
Adapters (2) KlipChip adapter 206-0364-00
SMA torque wrench 5/16-in, 7 in-lb.
SMA adapter wrench 7/32-in

1

Required for adjustment procedures only

1

P7240 Probe Optional Applications for Windows-Based

Oscilloscopes CD

W

011-0129-00

Special Adapters Required

Some of the adapters listed in Table 1 are custom-made and available only from
Tektronix. The adapters are described on the following pages.

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P7240 4 GHz Active Probe Service Manual

Description

TekConnect-to-SMA

Adapter

Probe Tip Adapter

The TekConnect-to-SMA Adapter, Tektronix part number TCA-SMA, allows
signals from an SMA cable or probe to be connected to a TekConnect input.
See Figure 1. Connect and disconnect the adapter the same way as you do the
P7240 Probe.

Figure 1: TekConnect-to-SMA adapter

The probe tip adapter, Tektronix part number 015-0678-00, provides a low-noise
method for connecting the P7240 to signals present on SMA cables. The adapter
has a test point for the probe and two SMA connectors. A 50 ohm termination is
included with the adapter, and is connected to the SMA connector nearest the
probe test point to minimize relections. Connect the cable from the test circuit to
the other SMA connector. See Figure 2.

NOTE. When taking measurements, do not touch the probe tip adapter. Measure­ment accuracy is degraded when the probe tip adapter is handled.

SMA connector for test circuit

Probe test point

Terminator

Figure 2: Probe tip adapter

P7240 4 GHz Active Probe Service Manual

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