Tektronix THS720P, THS730A, THS720A, THS710A Service Manual

Service Manual

THS710A, THS720A, THS730A & THS720P TekScopet

070-9752-02

This document applies to to serial number B010100 and above and firmware version 1.00 and above.

First printing: February 1998

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.

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

Tektronix products are covered by U.S. and foreign patent s, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.

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.

Pursuant to DFARS 252.227-7013(e), Tektronix Inc. hereby grants to the Government a nonexclusive, paid-up license throughout the world of the scope set forth therein for Government purposes for any commercial manuals provided by Tektronix Inc. under this contract.

Contacting Tektronix

Tektronix, Inc. 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA

For product information, sales, service, and technical support:

H In North America, call 1-800-833-9200.

H Worldwide, visit www.tektronix.com to find contacts in your area.

Warranty 16

Tektronix warrants that the product will be free from defects in materials and workmanship for a period of thre e (3) years from the date of original purchase from an authorized Tektronix distributor. If the 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. Parts, modules and replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.

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 integra tion increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT 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.

General Safety Summary v...................................

Service Safety Summary vii....................................

Preface ix...................................................

Related Manuals ix.................................................

Conventions x....................................................

Specifications 1.............................................

Operating Information 15.....................................

Internal and External Power Sources 15.................................

Understanding the Front Panel 17......................................

Connecting and Using the Probes 22...................................

Theory of Operation 25.......................................

Main Board 25.....................................................

Inverter Board 25...................................................

Display Module 26.................................................

Switch Assembly 26................................................

Performance V erification 27...................................

Test Record 28.....................................................

Performance Verification Procedures 30.................................

Adjustment Procedures 51.....................................

Required Equipment 51..............................................

Overview of the Adjustment Process 52.................................

Accessing the Adjustment-Lockout Jumper 53...........................

Oscilloscope Adjustment 55..........................................

Meter Adjustment 58................................................

Replacing the Adjustment-Lockout Jumper 61............................

Maintenance 63..............................................

Preparation 63.....................................................

Preventing ESD 63.................................................

Inspection and Cleaning 64...........................................

Removal and Installation Procedures 67.................................

Troubleshooting 90.................................................

Unpacking and Repacking Instructions 102...............................

Options 103..................................................

Electrical Parts List 105........................................

Diagrams 107.................................................

Mechanical Parts List 109......................................

Parts Ordering Information 109.........................................

Using the Replaceable Parts List 110....................................

THS710A, THS720A, THS730A & THS720P Service Manual

Table of Contents

List of Figures

Figure 1: Removing and replacing the battery 16..................

Figure 2: AC adapter attachment 16.............................

Figure 3: Typical scope-mode display 17.........................

Figure 4: Typical meter-mode display 18.........................

Figure 5: Connector locations 22................................

Figure 6: Module-level block diagram 26.........................

Figure 7: Location of adjustment-lockout jumper 54...............

Figure 8: Oscilloscope adjustment setups 56......................

Figure 9: Meter adjustment setups 59...........................

Figure 10: Relocating the adjustment-lockout jumper 61...........

Figure 11: Removing the tilt stand 70............................

Figure 12: Installing the tilt stand 71............................

Figure 13: Installing a new front-panel label 72...................

Figure 14: Removing the battery door 74.........................

Figure 15: Assembling a new front cover 75......................

Figure 16: Installing the gasket 76..............................

Figure 17: Installing the handle 77..............................

Figure 18: Removing the display module 79......................

Figure 19: Opening the display cable connector 80................

Figure 20: Routing cables to the inverter board 81.................

Figure 21: Lifting the chassis 82................................

Figure 22: Foam pad and hole plug locations on the back cover 83...

Figure 23: Routing the battery wires 84..........................

Figure 24: Removing the main board and switch flex-circuit

assembly 86..............................................

Figure 25: Foam pad locations on the chassis 87...................

Figure 26: Reassembling the chassis 89..........................

Figure 27: Battery connector location 91.........................

Figure 28: Bypassing the ON/STBY switch 93....................

Figure 29: Exploded diagram 113................................

THS710A, THS720A, THS730A & THS720P Service Manual

List of Tables

Table of Contents

Table 1: Oscilloscope specifications 1..........................

T able 2: DMM specifications 8................................

T able 3: General specifications 10..............................

Table 4: Summary of oscilloscope adjustment steps 55.............

T able 5: Summary of meter adjustment steps 58..................

T able 6: Internal inspection check list 65........................

Table 7: Removal and installation procedures 68..................

Table 8: TekScope instrument options 103........................

T able 9: Replaceable standard accessories 114.....................

THS710A, THS720A, THS730A & THS720P Service Manual

iii

Table of Contents

THS710A, THS720A, THS730A & THS720P Service Manual

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.

Connect and Disconnect Properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source.

Ground the Product. This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded.

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 specified type and rating.

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 Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

THS710A, THS720A, THS730A & THS720P Service Manual

General Safety Summary

Terms in this Manual

Symbols and Terms

on the Product

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.

These terms may appear on the product:

H DANGER indicates an injury hazard immediately accessible as you read the

marking.

H WARNING indicates an injury hazard not immediately accessible as you

read the marking.

H CAUTION indicates a hazard to property including the product.

The following symbol(s) may appear on the product:

CAUTION

Refer to Manual

WARNING

High Voltage

Double

Insulated

Protective Ground

(Earth) Terminal

THS710A, THS720A, THS730A & THS720P Service Manual

Service Safety Summary

Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any 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.

Use Care When Servicing With Power On. Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components.

To avoid electric shock, do not touch exposed connections.

THS710A, THS720A, THS730A & THS720P Service Manual

vii

Service Safety Summary

viii

THS710A, THS720A, THS730A & THS720P Service Manual

Preface

Related Manuals

This is the Service Manual for the THS710A, THS720A, THS730A, and THS720P TekScope instruments. This manual provides information to troubleshoot and repair the instrument to the module level.

Additional documentation for the instrument is contained in the related manuals listed below.

User Manual

Language

English 070-9731-XX 070-9741-XX 070-9751-XX

French 070-9732-XX 070-9742-XX

German 070-9733-XX 070-9743-XX

Italian 070-9734-XX 070-9744-XX

Korean 070-9735-XX 070-9745-XX

Portuguese 070-9736-XX 070-9746-XX

Spanish 070-9737-XX 070-9747-XX

Simplified Chinese 070-9738-XX 070-9748-XX

Traditional Chinese

Japanese 070-9740-XX 070-9799-00

Part Number

070-9739-XX 070-9749-XX

Reference Part Number

Programmer Manual Part Number

THS710A, THS720A, THS730A & THS720P Service Manual

Preface

Conventions

In the Performance Verification, Adjustments,andMaintenance chapters of this manual, TekScope instrument setups are shown in tables similar to the one shown below.

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.

6. 7. —

8. 9. 10.

4. Press the bezel button again until this selection is highlighted.

5. Use the

the value for a parameter.

/-- rocker to set

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

BNC

This chapter contains the oscilloscope, DMM, and general specifications for the THS710A, THS720A, THS730A, and THS720P TekScope instruments. All specifications are guaranteed unless noted “typical.” Typical specifications are provided for your convenience but are not guaranteed. Specifications that are marked with the n symbol are checked in the chapter Performance Verification.

All specifications apply to all four instruments unless noted otherwise. All specifications assume horizontal MAG is off, unless noted otherwise. To meet specifications, two conditions must first be met:

H The TekScope instrument must have been operating continuously for ten

minutes within the operating temperature range specified.

H You must perform the Compensate Signal Path operation, accessible through

the utility menu, if the ambient temperature changes by more than 5° C.

Table 1: Oscilloscope specifications

Acquisition

Acquisition Modes Sample (Normal), Peak detect, Envelope, and Average

Acquisition Rate, typical

Single Sequence Acquisition Mode Acquisition Stops After

Up to 25 waveforms per second (2 channels, sample acquisition mode, MAG on, no measurements)

Sample, Peak Detect Single acquisition, one or two

channels simultaneously

Average, Envelope N acquisitions, one or two chan-

nels simultaneously, N is settable from 2 to 256 or ∞

Inputs

Input Coupling DC, AC, or GND

Input Impedance, DC Coupled

Maximum Voltage Overvoltage Category Maximum Voltage Between Signal and Common at Input

THS710A, THS720A, THS730A & THS720P Service Manual

1MΩ ±1% in parallel with 25 pF ±2pF

CAT II Environment (refer to page 13)

CAT III Environment (refer to page 13)

For steady-state sinusoidal waveforms, derate at 20 dB/decade above 100 kHz to 13 V Category description on page 13.

at 3 MHz and above. Also, refer to Overvoltage

300 V

150 V

RMS

Specifications

peBa

lopeBandwidth

Table 1: Oscilloscope specifications (Cont.)

Inputs

Maximum Voltage Between Common and Earth Ground at BNC

600 V

RMS

accessories

30 V

, 42.4 Vpk, using noninsulated connectors and acessories

RMS

(CAT II) or 300 V

(CAT III), using rated connectors or

RMS

Maximum Voltage,

30 V

, 42.4 Vpk, using noninsulated connectors and acessories

RMS

Channel-to-Channel Commons

Channel-to-Channel Common Mode Rejection, typical

100:1 at frequencies ≤50 MHz, measured on MATH Ch1 -- Ch2 waveform, with test signal applied between signal and common of both channels, and with the same VOLTS/DIV and coupling settings on each channel

Channel-to-Channel Crosstalk, typical

≥100:1 at 50 MHz, measured on one channel, with test signal applied between signal and common of the other channel, and with the same VOLTS/DIV and coupling settings on each channel

Common to Chassis

55 pF

Capacitance, typical

Vertical

Number of Channels 2

Digitizers 8 bit resolution, separate digitizers for each channel sample

simultaneously

VOLTS/DIV Range 5 mV/div to 50 V/div at input BNC

Polarity Normal and Invert

Position Range ±10 divisions

n Analog Bandwidth THS710A THS720A THS720P THS730A at BNC, DC Coupled (typical at 5 mV/div, guaranteed at all other settings)

Peak Detect or Envelo

ndwidth,

, typical (25 MS/s or slower)

60 MHz at input BNC

100 MHz at input BNC

(90 MHz above 35° C)

100 MHz at input BNC

(90 MHz above 35° C)

200 MHz at input BNC

(180 MHz above 35° C)

THS710A THS720A THS720P THS730A

50 MHz

75 MHz 75 MHz 85 MHz

Analog Bandwidth

Selectable between 20 MHz or full

Limit, typical

Lower Frequency Limit, AC Coupled,

≤10 Hz at BNC, reduced by a factor of ten when using a 10X passive probe

typical

Rise Time at BNC, THS710A THS720A THS720P THS730A typical

5.8 ns 3.5 ns 3.5 ns 1.75 ns

THS710A, THS720A, THS730A & THS720P Service Manual

Table 1: Oscilloscope specifications (Cont.)

forms

ggy

Vertical

Peak Detect or Envelope Pulse Response, typical

DC Gain Accuracy ±2% for Sample or Average acquisition mode

Position Accuracy ±[0.4% × |(position × volts/div)| + (0.1 div × volts/div)]

n DC Measurement Measurement Type Accuracy Accuracy, Average Acquisition Mode Using ≥16 Wave-

Captures 50% or greater amplitude of pulses ≥ 8nswide(≥ 20 ns wide at 500 ns/div)

Absolute voltage measurements ±[2% × |reading +

(position × volts/div)| + (0.1 div × volts/div)]

Specifications

Delta voltage between any two waveforms acquired under same setup

DC Measurement Accuracy, Sample Acq. Mode, typical

Horizontal

Sample Rate Range THS710A THS720A THS720P THS730A

Record Length 2500 samples for each channel

SEC/DIV Range THS710A THS720A THS720P THS730A (including MAG)

n Sample Rate and Delay Time Accuracy

Delay Time Range Zero to 50 s

Internal Trigger

n Trigger Sensitivity, Coupling Sensitivity Edge Trigger Type (THS710A, THS720A, and THS720P)

±[2% × |reading + (position × volts/div)| + (0.15 div × volts/div) +

0.6 mV]

5 S/s to 250 MS/s, in a

1.25, 2.5, 5 sequence

10 ns/div to 50 s/div

±200 ppm over any ≥1 ms time interval

5 S/s to 500 MS/s, in a

1.25, 2.5, 5 sequence

5 ns/div to 50 s/div

±[2% × |reading| + (0.05 div × volts/div)]

5 S/s to 500 MS/s, in a

1.25, 2.5, 5 sequence

5 ns/div to 50 s/div

0.35 div from DC to 50 MHz, increasing to 1 div at 100 MHz (90 MHz above 35° C)

5S/sto1GS/s, in a 1.25, 2.5, 5 sequence

2 ns/div to 50 s/div

n Trigger Sensitivity, Coupling Sensitivity Edge Trigger Type (THS730A)

THS710A, THS720A, THS730A & THS720P Service Manual

DC 0.35 div from DC to 50 MHz,

increasing to 1.5 div at 200 MHz (180 MHz above 35° C)

Specifications

ggy

ypica

Table 1: Oscilloscope specifications (Cont.)

Internal Trigger

Trigger Sensitivity, Coupling Sensitivity Edge Trigger Type,

Trigger Level Range ±4 divisions from center of screen

Motor Trigger Level Range (THS720P)

Trigger Level Accuracy, typical

SET LEVEL TO 50%, typical

Width Range, Pulse Trigger Type, typical

Width Tolerance Range, Pulse Trigger Type, typical

NOISE REJ 3.5 times the DC-coupled limits

HF REJ 1.5 times the DC-coupled limit

from DC to 30 kHz, attenuates signals above 30 kHz

LF REJ 1.5 times the DC-coupled limits

for frequencies above 1 kHz, attenuates signals below 1 kHz

0.1 to 5 divisions from center screen, polarity depends on slope selection

±0.2 divisions, for signals having rise and fall times ≥20 ns

Operates with input signals ≥50 Hz

99 ns to 1 s, with resolution of 33 ns or approximately 1% of setting (whichever is greater)

5%, 10%, 15%, or 20%

Sensitivity, Video Trigger Type, typical

Signal Formats and

Composite video signal with negative sync pulse amplitude from 0.6 to 2.5 divisions

Broadcast systems Supports NTSC, PAL, and Field Rates, Video Trigger Type

Interlaced

Non-interlaced Trigger on selected line or any line

Line Rates 15 kHz to 65 kHz, in five ranges

Holdoff Range 495 ns to 10 s

External Trigger

External Trigger, Max-

600 V

CAT II or 300 V

RMS

imum Input Voltage

External Trigger

DC only Coupling

External Trigger

+0.2 V or +2 V, selectable Levels

External Trigger Sensitivity

500 mV

fromDCto1MHz,increasingto1V

p-p

signal centered at selected trigger level

SECAM

Trigger on selected line of odd field, selected line of even field, or any line

CAT III (refer to page 13)

RMS

at 5 MHz, with

p-p

THS710A, THS720A, THS730A & THS720P Service Manual

Table 1: Oscilloscope specifications (Cont.)

Measurements

Cursors Voltage difference between cursors (ΔV)

Time difference between cursors (ΔT) Reciprocal of ΔTinHertz(1/ΔT) Phase difference between cursors (ΔDegrees)

Specifications

Automated Measurements

Amplitude, Burst Width, Cycle Mean, Cycle RMS, Fall Time, Frequency, High, Low, Max, Mean, Min, Negative Duty Cycle, Negative Overshoot, Negative Width, Pk -- Pk, Period, Positive Duty Cycle, Positive Overshoot, Positive Width, Rise Time, and RMS

Voltage and Current Harmonics (THS720P)

Number of Harmonics First 31 harmonics of signal with fundamental frequency between

30 Hz and 450 Hz

Harmonics Amplitude Accuracy

Accuracies below are stated as a percent of the fundamental amplitude and are valid only if peak-to-peak amplitude is ≥4 di v isions and number of averages ≥16

Fundamental 2--11 12 -- 21 22 -- 31

±2.5% ±2.5% ±4% ±4%

Harmonics Phase Fundamental 2--11 12 -- 21 22 -- 31 Accuracy

— ±4 ° ±8 ° ±8 °

THD-F Measurement Total harmonic distortion relative to the fundamental amplitude

THD-F =

Ꭹ

RMS

− V

Ꭹ

RMS

− A

THD-F Accuracy ±4%

THD-R Measurement Total harmonic distortion relative to the RMS amplitude

THD-R =

Ꭹ

RMS

− V

RMS

Ꭹ

RMS

− A

RMS

THD-R Accuracy ±4%

Frequency Accuracy ±0.2% of reading

Power Measurements (THS720P)

True Power Measurement

W =

ᒑ

Vn× A

measured over an integral number of cycles that contain n sample points

Apparent Power

VA = V

RMS

× A

RMS

Measurement

Reactive Power Measurement

Power Measurements

VAR = (VA)2− W

Ꭹ

±4% at the BNCs (not including probe uncertainty)

Accuracy

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

Table 1: Oscilloscope specifications (Cont.)

Power Measurements (THS720P)

PF Measurement

Power factor (PF) =

θ Measurement θ is the phase difference between the fundamental components of

voltage and current. Positive angle means voltage leads current.

Negative angle means voltage lags current.

DPF Measurement Displacement power factor (DPF) = cos θ

Power Factor Mea-

±0.05 surements Accuracy

With P6117 Probe

Analog Bandwidth, THS710A THS720A THS720P THS730A DC Coupled

60 MHz 100 MHz

true power

apparent power

100 MHz

200 MHz

(90 MHz above 35° C)

Probe Attenuation 10X

Maximum Voltage Overvoltage Category Maximum Voltage Between Probe Tip and Reference Lead

CAT II Environment (refer to

page 13)

CAT III Environment (refer to

300 V

150 V

RMS

page 13)

For steady-state sinusoidal waveforms, derate at 20 dB/decade above

900 kHz to 13 V

at 27 MHz and above. Also, refer to Overvoltage

Category description on page 13.

Maximum Voltage

30 V

RMS

, 42.4 V

Between Reference Lead and Earth Ground Using P6117 Probe

Maximum Voltage,

30 V

RMS

, 42.4 V

Channel-to-Channel Reference Leads Using P6117 Probe

(180 MHz above 35° C)

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

DCCoupled

andReferenceLea

LeadandEart

Table 1: Oscilloscope specifications (Cont.)

With P5102 Probe

Analog Bandwidth, THS710A THS720A THS720P THS730A DC Coupled

60 MHz 100 MHz

100 MHz

(90 MHz above 35° C)

Probe Attenuation 10X

Maximum Voltage Overvoltage Category Maximum Voltage Between Probe Tip and Reference Lead,

CAT II Environment (refer to page 13)

CAT III Environment (refer to

1000 V

600 V

RMS

page 13)

Maximum Voltage Between Probe Tip

AC Coupled

Maximum Voltage Between Reference

Ground

Overvoltage Category Maximum Voltage

CAT II Environment ±1000 V

CAT III Environment

±600 V

Overvoltage Category Maximum Voltage

CAT II Environment 600 V

CAT III Environment 300 V

RMS

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

Groun

Table 2: DMM specifications

General

Resolution 33⁄4digit, 4000 count full scale reading except as noted

Input Resistance, AC or DC Voltage

Input Capacitance, AC or DC Voltage, typical

Maximum Voltage Overvoltage Category Maximum Voltage Between DMM and COM Inputs

Maximum Voltage Overvoltage Category Maximum Voltage Between DMM or COM Input and Earth

DC Voltage

Ranges and Range Resolution Resolution

n Accuracy ±(0.5% of reading + 5 counts)

Normal Mode Rejection, typical

Common Mode Rejection, typical

10 MΩ ±10%

≤100 pF

CAT I Environment (refer to

640 V

RMS

(880 VDC)

page 13)

CAT II Environment (refer to

600 V

RMS

page 13)

CAT III Environment (refer to

300 V

RMS

page 13)

CAT I Environment (refer to

640 V

RMS

(880 VDC)

page 13)

CAT II Environment (refer to

600 V

RMS

page 13)

CAT III Environment (refer to

300 V

RMS

page 13)

400.0 mV 0.1 mV

4.000 V 1mV

40.00 V 10 mV

400.0 V 100 mV

880 V 1V

Rejects AC signals by >60 dB at 50 Hz or 60 Hz (user selectable)

Rejects AC signals by >100 dB at 50 Hz or 60 Hz (user selectable)

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

Mea

ypica

Table 2: DMM specifications (Cont.)

AC Voltage

Conversion Type AC conversions are true RMS. The AC measurement is based on the

AC and DC components of the signal as shown below:

AC Measurement = RMS(AC+DC) -- DC

Ranges and Range Resolution Resolution

n Accuracy Input Waveform Maximum Error (40Hzto500Hz)

Common Mode Rejection, typical

Ω/Resistance

Ranges and Range Resolution Resolution

n Accuracy Range Maximum Error

Bias Voltage for Full Range Full Scale Bias Voltage Scale Resistance

surement,

400.0 mV

4.000 V 1mV

40.00 V 10 mV

400.0 V 100 mV

640 V 1V

Sinusoidal waveforms ±(2% of reading + 5 counts)

Nonsinusoidal waveforms with crest factor up to 3

Rejects AC signals by >60 dB at DC, 50 Hz, and 60 Hz

400.0 Ω 0.1 Ω

4.000 kΩ 1 Ω

40.00 kΩ 10 Ω

400.0 kΩ 100 Ω

4.000 MΩ 1kΩ

40.00 MΩ 10 kΩ

All ranges except 40 MΩ ±(0.5% of reading + 2 counts)

40 MΩ ±(2% of reading + 5 counts) for

400.0 Ω 350 mV

4.000 kΩ 200 mV

40.00 kΩ 350 mV

400.0 kΩ 350 mV

4.000 MΩ 400 mV

40.00 MΩ 1.10 V

0.1 mV

±(4% of reading + 5 counts)

≤60% relative humidity

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

pg,

Table 2: DMM specifications (Cont.)

Ω/Resistance

Open Circuit Voltage, Range Open Circuit Voltage typical

Continuity Check

Indication An audible tone is generated when measured resistance is below 50

Open Circuit Voltage, typical

Test Current, typical 1mA

Diode Check

Range Zero to 2 V, measures forward voltage drop of semiconductor junction

Voltage Accuracy, typical

Open Circuit Voltage, typical

Test Current, typical 1mA

Data Logger

Horizontal Scale Range

Vertical Zoom Range 2X, 5X, or 10X

400.0 Ω 4.8 V

All other ranges ≤1.2 V

Ω,typical

±25%

30 s/div to 24 hours/div (4 minutes to 8 days, full scale)

Table 3: General specifications

Display

Display Type 4.7 in (120 mm) diagonal liquid crystal

Display Resolution 320 horizontal by 240 vertical pixels

Display Contrast Adjustable, temperature compensated

Backlight Intensity, typical

35 cd/m

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

,yp

Table 3: General specifications (Cont.)

RS-232 Interface

Device Type DTE. at RJ-45 connector

Pinout Signal Pin Number at

9-pin Null Modem Adapter

RTS out 1 8

TXD out 2 6

RXD in 3 5

GND 5 4

DTR out 6 3

CTS in 7 7

RTS out 8 8

DSR in (not used) 4 2

DCD in (not used) 7 1

Probe Compensator Output

Output Voltage, typical

Frequency, typical 1.2 kHz

Power Source

Battery Replaceable Ni-Cd battery pack

Battery Life, typical Approximately two hours of continuous use from a full charge

Low Battery Indication, typical

Battery Saver Standby Time-out and Backlight Time-out extend battery life. Time-out

Battery Charging Time, typical

External Power 12 VDC nominal, center positive; Operates with input from 10 VDC to

5.0 V into ≥1MΩ load

Low battery message first appears approximately ten minutes before the instrument powers off automatically

ranges from 1 minute to 15 minutes, or off.

With TekScope instrument operating

With TekScope instrument turned off

In external charger 1.5 hours

15 VDC

9 hours

Pin Number at RJ-45 Connector

The DC INPUT disconnects itself automatically if >15 VDC is applied. If this occurs, disconnect the overvoltage and then reconnect to a voltage in the proper range.

Memory Retention, typical

Fuse This instrument has no user-replaceable fuses

THS710A, THS720A, THS730A & THS720P Service Manual

All memory is retained indefinitely with battery removed and without external power applied.

Specifications

Table 3: General specifications (Cont.)

Environmental

Temperature Operating -- 1 0 ° Cto+50° C

Nonoperating -- 2 0 ° Cto+60° C

Humidity +40° C or below ≤95% relative humidity

+41° Cto+50° C ≤75% relative humudity

Altitude Operating 2,000 m

Nonoperating 15,000 m

Random Vibration Operating 2.66 g

10 minutes on each axis

Nonoperating 3.48 g

10 minutes on each axis

Drop Resistance,

Survives a 30 in (76 cm) drop onto concrete with only cosmetic damage typical

Moisture Resistance Meets IEC529, IP43 with DC input hole plug, I/O port hol e plug, and

battery door installed.

Mechanical

Size Height 8.53 in (217 mm)

Width 6.95 in (177 mm)

Depth 2.00 in (50.8 mm)

Weight With battery installed 3.2 lbs (1.5 kg)

With all standard accessories in

7.5 lbs (3.4 kg)

soft carry case

When packaged for domestic

9.0 lbs (4.1 kg)

shipment

Adjustment Interval

The recommended adjustment interval is one year

from 5 Hz to 500 Hz,

RMS

from 5 Hz to 500 Hz,

RMS

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

ggy

Table 3: General specifications (Cont.)

Certifications and Compliances

Certifications Listed UL3111-1 and CAN/CSA-C22.2 No. 1010.1-92, complies with

EN61010-1 /A2

Overvoltage Category Category Examples

CAT III A typical CAT III environment is

the power distribution system within a building or factory. These environments are somewhat protected from lightning strikes, but susceptible to switching transients and other disturbances that may generate high voltage impulses.

CAT II A typical CAT II environment is

the 120/240 V distribution system within a lab or office. These environments are fairly well protected from external high voltage disturbances.

CAT I A typical CAT II environment is

circuitry inside electrical or electronic equipment that is powered by a power supply or a battery.

EC Declaration of Conformity

Meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low-Voltage Directive 73/23/ECC for Product Safety as ammended by 93/68/EEC. Compliance was demonstrated to the following specifications as listed in the official Journal of the European Communities:

EN 55011 Class A: Radiated and Conducted Emissions

EN 50081--1 Emissions:

EN 60555--2 Power Harmonics

EN 50082--1 Immunity:

IEC 801--2 Electrostatic Discharge IEC 801--3 RF Radiated

IEC 801--4 Fast Transients IEC 801--5 Surge

EN 61010--1 Safety

Tektronix-supplied ferrite bead required on instrument end of RS-232 cable

Performance criteria: ≤ 5.0 div increase in peak to peak noise (Sample acquisition mode, full bandwidth); otherwise, ≤ 1.0 div increase in peak to peak noise

Applies to instrument operating with Tektronix-supplied AC adapter

THS710A, THS720A, THS730A & THS720P Service Manual

Specifications

THS710A, THS720A, THS730A & THS720P Service Manual

Operating Information

This chapter provides a quick overview of the following topics:

H Internal and external power sources

H Understanding the front panel

H Connecting and using the probes

For more detailed information about TekScope instrument operation, refer to the THS710A, THS720A, THS730A, & THS720P User Manual.

For information about unpacking and inspecting the instrument, refer to Unpacking and Repacking Instructions on page 102 of this manual.

Internal and External Power Sources

You can power the TekScope instrument from the internal battery pack or from the AC adapter (both are standard accessories).

Using 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 9 hours

Battery pack in external charger 1.5 hours

You can remove and replace the battery pack without losing any saved information. The current setup, saved setups, saved waveforms, and saved data are stored in nonvolatile memory that does not depend on battery power. To prevent loss of saved information, set the ON/STBY switch to STBY before removing the battery pack. See Figure 1 for instruction to remove and replace the battery.

WARNING. To avoid shock hazard, the battery door must remain closed in wet or damp conditions.

THS710A, THS720A, THS730A & THS720P Service Manual

Operator Information

Battery pack

Figure 1: Removing and replacing the battery

Using External Power

For benchtop operation, you can use external power. Attach the AC adapter as shown in Figure 2. The DC INPUT disconnects itself if an overvoltage is applied. If this occurs, disconnect and then reconnect the AC adapter to resume operation from external power.

WARNING. To avoid shock hazard, the DC input and I/O port hole plugs must remain closed in wet or damp conditions.

External power to

DC INPUT

Figure 2: AC adapter attachment

THS710A, THS720A, THS730A & THS720P Service Manual

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