Tektronix TekScope THS 710 User manual

Form 080/01
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THS 710 & THS 720
TekScope
User Manual
070-9247-02
This document applies to firmware version 1.00
and above.

Copyright Tektronix, Inc. 1995. 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 this product will be free from defects in materials and
workmanship for a period of three (3) years from the date of shipment. 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.
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; or c) 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 THIS
PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED 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 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

THS 710 & THS 720 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 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Meter Mode 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensating the Oscilloscope Probes 2–8. . . . . . . . . . . . . . . . . . .
Taking Floating Measurements 2–10. . . . . . . . . . . . . . . . . . . . . . . . .
Application Examples 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying an Unknown Signal 2–14. . . . . . . . . . . . . . . . . . . . . . . . .
Measuring Resistance 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measuring the Frequency of a Clock Signal 2–18. . . . . . . . . . . . . . .
Measuring Propagation Delay 2–20. . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on a Missing Data Pulse 2–22. . . . . . . . . . . . . . . . . . . . .
Detecting Narrow Glitches 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing a Switching Transistor Drive Circuit 2–26. . . . . . . . . . . . . .
Measuring Instantaneous Power Dissipation
in a Switching Transistor 2–28. . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering at a Specific Motor RPM 2–30. . . . . . . . . . . . . . . . . . . . .
Using the Oscilloscope and DMM at the Same Time 2–32. . . . . . . .
Monitoring for Power Surges and Dropouts 2–34. . . . . . . . . . . . . . .
Triggering on a Video Field 2–36. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on a Video Line 2–38. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii THS 710 & THS 720 User Manual
Reference
Introduction to Reference 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACQUIRE 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUTORANGE 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CURSOR 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISPLAY 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HARD COPY 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HOLD 3–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HORIZONTAL Controls 3–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MEAS 3–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
METER Mode 3–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAVE/RECALL 3–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCOPE Mode 3–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRIGGER Controls 3–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UTILITY 3–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VERTICAL Controls 3–59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
Glossary
Index

THS 710 & THS 720 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.
Only qualified personnel should perform service procedures.
Injury Precautions
Use Proper Power Cord. To avoid fire hazard, use only the power cord
specified for this product.
Avoid Electric Overload. To avoid injury or fire hazard, do not apply
potential to any input, including the common inputs, that varies from
ground by more than the maximum rating for that input.
Avoid Electric Shock. To avoid injury or loss of life, do not connect or
disconnect probes or test leads while they are connected to a voltage
source.
Do Not Operate Without Covers. To avoid electric shock or fire hazard,
do not operate this product with covers or panels removed.
Do Not Operate in Wet/Damp Conditions. To avoid electric shock, do not
operate this product in wet or damp conditions.
Do Not Operate in an Explosive Atmosphere. To avoid injury or fire
hazard, do not operate this product in an explosive atmosphere.
Product Damage Precautions
Use Proper Power Source. Do not operate this product from a power
source that applies more than the voltage specified.
Do Not Operate With Suspected Failures. If you suspect there is damage
to this product, have it inspected by qualified service personnel.

General Safety Summary
iv THS 710 & THS 720 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:
ProtectiveGround
(Earth)Terminal ATTENTION Refer to Manual Double Insulated
DANGER
High Voltage
Certifications and Compliances
CSA Certified AC Adapter. CSA Certification includes the AC adapters
appropriate for use in the North America power network. All other
AC adapters supplied are approved for the country of use.
Compliances. Consult the product specifications for Overvoltage
Category and Safety Class.

THS 710 & THS 720 User Manual v
Preface
This User Manual describes the capabilities, operation, and
applications of the THS 710 and THS 720 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 Application Examples on page 2–13
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 3–17
Technical specifications Specifications appendix on page A–1
Recommended accessories Accessories appendix on page C–1

Preface
vi THS 710 & THS 720 User Manual
Conventions
TekScope instrument setups are shown in tables. The Application
Examples and Performance Verification sections use tables to show
specific setups. The Reference section uses similar tables to show the
complete contents of the menu system.
The header of each table contains icons that represent the controls
and menu items used to set up the instrument. To make a specific
setup, read the table from left to right and then from top to bottom as
shown below. The table contains the symbol “—” if no action is
required.
1. Choose
scope mode
or meter
mode.
2. Press this
button on the
front panel.
3. Press this
bezel button. 4. Press the bezel button
again until
this selection
is highlighted.
5. Use the
+/– rocker to
set the value
for a parame-
ter.
6. 7. —
8. 9. 10.

Getting Started

THS 710 & THS 720 User Manual 1–1
Getting Started
In addition to a brief product description, this chapter covers the
following topics:
HHow to change the battery pack
HHow to use external power
HHow to use the tilt stand
HHow to perform a quick functional check
Product Description
The THS 710 and THS 720 TekScope instruments combine a
two-channel oscilloscope and a digital multimeter (DMM) in a
rugged, handheld package.
General Features
HBattery power or external power
HHigh-resolution, high-contrast display with temperature
compensation for clear visibility over a wide temperature range
HOnboard waveform, data, and setup storage
HRS-232 communication port to load setups, download wave-
forms, and make hard copies
HFully programmable through the RS-232 communication port

Getting Started
1–2 THS 710 & THS 720 User Manual
OscilloscopeFeatures
The TekScope instrument is a powerful, two-channel oscilloscope
with the following features:
HAutoranging for quick setup and hands-free operation
H100 MHz (THS 720) or 60 MHz (THS 710) bandwidth with
selectable 20 MHz bandwidth limit
H500 MS/s (THS 720) or 250 MS/s (THS 710) sample rate and
2,500 point record length
HSeparate digitizers for each channel (both channels always
acquire simultaneously)
HWaveform averaging and enveloping with hardware peak
detection
HDigital Real Time digitizing (up to five-times oversampling),
sin(x)/x interpolation, and peak-detect acquisition to limit the
possibility of aliasing
HIndependently isolated channels to allow improved safety for
measurements to 1000 VRMS while floating up to 600 VRMS
using P5102 probes
HCursors and 21 continuously updated, automatic measurements
HSimultaneous oscilloscope and meter operation on the same or
on separate signals
HAdvanced pulse and video trigger capability

Getting Started
THS 710 & THS 720 User Manual 1–3
Meter Features
The TekScope instrument is also a full-featured DMM with the
following features:
HTrue RMS VAC, VDC, , continuity, and diode-check functions
HAutoranging or manual ranging
HData logger plot of meter measurements over a period of time
HMax, min, delta max-min, relative-delta, and average statistics in
the readout
HBar graph for an “analog meter” feel
HCapability to float independently to 600 VRMS
HOvervoltage indicator warns when an overvoltage is applied to
the input

Getting Started
1–4 THS 710 & THS 720 User Manual
Input and Output Connectors
All input and output connectors are located on the top and side
panels as shown below.
NOTE. See the back of the instrument for maximum voltage ratings.
Top panel
Side panel

Getting Started
THS 710 & THS 720 User Manual 1–5
Replacing the Battery Pack
For portable operation, use the rechargeable battery pack.
You can replace the battery pack without losing any saved informa-
tion. The current setup, saved setups, saved waveforms, and saved
data are all stored in nonvolatile memory that does not depend on
battery power.
CAUTION. To prevent loss of saved information, set the ON/STBY
switch to STBY before removing the battery back.
Battery pack

Getting Started
1–6 THS 710 & THS 720 User Manual
Battery Life
From a full charge, you can operate the TekScope instrument
continuously for approximately two hours. You can extend the
battery life by using automatic Power Off Time-out or Backlight
Time-out. Refer to page 3–56 for a description of these features.
The TekScope instrument turns off automatically when the battery
runs low. A low-battery message appears in the display about ten
minutes before the automatic shutdown.
Nickel-cadmium batteries can lose capacity permanently if not
allowed to discharge completely. Whenever possible, allow the
battery to discharge completely before you recharge it to minimize
this capacity loss.
Charging the Battery Pack
Before using the battery for the first time, it must be charged. You
can use external power to charge the battery pack while it is in the
TekScope instrument. Or you can charge the battery pack with the
optional external battery charger. Typical battery charging times are
listed below.
Configuration Typical Charging Time
Battery pack in TekScope instrument 20 hours
Battery pack in external charger 1.5 hours
CAUTION. To avoid loss of saved information when a battery pack is
not installed, set the ON/STBY control to STBY before disconnecting
external power.

Getting Started
THS 710 & THS 720 User Manual 1–7
Using External Power
Using external power from the AC adapter or cigarette lighter
adapter has the following advantages:
HSaves internal battery power for portable operation later
HCharges internal battery pack
HAllows extended operation; the Standby Time-out and Backlight
Time-out features are automatically disabled when external
power is used
HMaintains floating measurement capability of the oscilloscope
channels and DMM
Attach the external power source as shown below.
The DC INPUT disconnects itself if an overvoltage is applied. If this
occurs, disconnect and then reconnect the AC adapter or cigarette
lighter adapter to resume operation from external power.
External power to
DC INPUT
CAUTION. To avoid overheating, do not connect external power while
the instrument is in a confined space, such as in the soft case.