Tektronix TekScope THS710A User manual

Form 080/01
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THS710A, THS720A,
THS730A & THS720P
TekScope
User Manual
070-9731-05
This document applies to serial number B010100
and above and firmware version 1.13 and above.
First printing: February 1998

Copyright Tektronix, Inc. All rights reserved.
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.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Tek Secure is a registered trademark of Tektronix, Inc.
TekTools, TekScope, and IsolatedChannel 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 three (3) years from the date of purchase
from an authorized Tektronix distributor. If any such 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. Batteries are excluded from this warranty.
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, shipping charges prepaid,
and with a copy of customer proof of purchase. 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 WITH RESPECT TO THE
LISTED PRODUCTS 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.

Service Assurance
If you have not already purchased Service Assurance for this product, you may
do so at any time during the product’s warranty period. Service Assurance
provides Repair Protection and Calibration Services to meet your needs.
Repair Protection extends priority repair services beyond the product’s
warranty period; you may purchase up to three years of Repair Protection.
Calibration Services provide annual calibration of your product, standards
compliance and required audit documentation, recall assurance, and reminder
notification of scheduled calibration. Coverage begins upon registration; you
may purchase up to five years of Calibration Service.
Service Assurance Advantages
HPriced well below the cost of a single repair or calibration
HAvoid delays for service by eliminating the need for separate purchase
authorizations from your company
HEliminates unexpected service expenses
For Information and Ordering
For more information or to order Service Assurance, contact your local
Tektronix representative and provide the information below. Service Assurance
may not be available in locations outside the United States of America.
Name VISA or Master Card expiration date or
Company purchase order number
Address Repair Protection (1,2 or 3 years)
City, State, Postal code Calibration Service (1,2,3,4 or 5 years)
Country Instrument model and serial number
Phone Instrument purchase date
To learn the location of your nearest Tektronix representative, please call
1-800-TEK-WIDE in North America, 1-503-627-7111 elsewhere, or look us up
on the World Wide Web at http://www.tek.com.

THS710A, THS720A, THS730A & THS720P User Manual i
Table of Contents
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In This Manual v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Battery Pack 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using External Power 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Tilt Stand 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Check 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics
Functional Overview 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Understanding the Front Panel 2–1. . . . . . . . . . . . . . . . . . . . . . . . .
Using Scope Mode 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Meter Mode 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensating the Oscilloscope Probes 2–10. . . . . . . . . . . . . . . . . . .
Compensating the Oscilloscope Signal Path 2–11. . . . . . . . . . . . . . .
Taking Floating Measurements 2–12. . . . . . . . . . . . . . . . . . . . . . . . .
General-Purpose Application Examples 2–15. . . . . . . . . . . . . . . .
Displaying an Unknown Signal 2–16. . . . . . . . . . . . . . . . . . . . . . . . .
Measuring Resistance 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measuring the Frequency of a Clock Signal 2–20. . . . . . . . . . . . . . .
Measuring Propagation Delay 2–22. . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on a Missing Data Pulse 2–24. . . . . . . . . . . . . . . . . . . . .
Detecting Narrow Glitches 2–26. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on a Third Signal 2–28. . . . . . . . . . . . . . . . . . . . . . . . . . .
Analyzing a Serial Data Communication Link 2–30. . . . . . . . . . . . .
Triggering on a Video Signal 2–32. . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Measurement Application Examples 2–35. . . . . . . . . . . . .
Testing a Switching Transistor Drive Circuit 2–36. . . . . . . . . . . . . .
Measuring Instantaneous Power Dissipation
in a Switching Transistor 2–38. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii THS710A, THS720A, THS730A & THS720P User Manual
Monitoring for Power Surges and Dropouts 2–40. . . . . . . . . . . . . . .
Detecting a Missing Power Cycle 2–42. . . . . . . . . . . . . . . . . . . . . . .
Measuring Harmonic Current (THS720P) 2–44. . . . . . . . . . . . . . . . .
Taking Power Measurements (THS720P) 2–46. . . . . . . . . . . . . . . . .
Measuring Motor Start-Up Current 2–48. . . . . . . . . . . . . . . . . . . . . .
Triggering at a Specific Motor RPM 2–50. . . . . . . . . . . . . . . . . . . . .
Triggering on a Motor Drive Waveform (THS720P) 2–52. . . . . . . .
Reference
Introduction to Reference 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACQUIRE 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUTORANGE 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CURSOR 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISPLAY/HARMONICS 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HARD COPY 3–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOLD 3–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HORIZONTAL Controls 3–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MEAS 3–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
METER Mode 3–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAVE/RECALL 3–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCOPE Mode 3–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRIGGER Controls 3–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UTILITY 3–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VERTICAL Controls 3–68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
Appendix A: Specifications A–1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Factory Setup B–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix C:Accessories C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix D: Performance Verification D–1. . . . . . . . . . . . . . . . .
Test Record D–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedures D–4. . . . . . . . . . . . . . . . . . . .
Appendix E: General Care and Cleaning E–1. . . . . . . . . . . . . . .
General Care E–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning E–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary and Index

THS710A, THS720A, THS730A & THS720P User Manual 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. 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.
Replace Batteries Properly. Replace batteries only with the proper type
and rating specified.
Recharge Batteries Properly. Recharge batteries for the recommended
charge cycle only.
Use Proper AC Adapter. Use only the AC adapter specified for this
product.
Do Not Operate Without Covers. Do not operate this product with
covers or panels removed.
Avoid Exposed Circuitry. Do not touch exposed connections and
components when power is present.
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 an Explosive Atmosphere.
Do Not Operate in Wet/Damp Conditions.

General Safety Summary
iv THS710A, THS720A, THS730A & THS720P User Manual
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.
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 WARNING High Voltage Double
Insulated ProtectiveGround
(Earth) Terminal
Battery Recycling
This product contains a Nickel Cadmium (NiCd) battery, which must
be recycled or disposed of properly. For the location of a local
battery recycler in the U.S. or Canada, please contact:
RBRC (800) BATTERY
Rechargeable Battery Recycling Corp. [phone]
P.O. Box 141870 www.rbrc.com
Gainesville, Florida 32614

THS710A, THS720A, THS730A & THS720P User Manual v
Preface
This User Manual describes the capabilities, operation, and
applications of the THS710A, THS720A, THS730A, and THS720P
TekScope instruments.
In This Manual
The following table shows you where to find information in this
manual.
If you are looking for: Turn to:
Product overview Product Description on page 1–1
Details about a product feature Reference on page 3–1
Look up the front-panel button for the
feature
Application examples General-Purpose Application Exam-
ples on page 2–15 and Power-Mea-
surement Application Examples on
page 2–35
Operation instructions Understanding the Front Panel on
page 2–1
Information about battery operation Changing the Battery Pack on
page 1–5
Information about using external
power Using External Power on page 1–7
Information about making a hard copy HARD COPY on page 3–22
Technical specifications Specifications appendix on page A–1
Recommended accessories Accessories appendix on page C–1