Tektronix THS 720, THS 710 Service Manual

Service Manual

THS 710 & THS 720

TekScope

070-9246-03

This document applies to firmware version 1.00 and above.

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 E 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 Services.

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 number and expiration
Company	date or purchase order number
Address	Repair Protection (1,2, or 3 years)
City, State, Postal code	Calibration Services (1,2,3,4, or 5 years)
Country	Instrument model and serial number
Phone	Instrument purchase date

Table of Contents

General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	v
Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	vii
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	ix
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	ix
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	x
Specifications
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±1
Operator Information
Internal and External Power Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±1
Understanding the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±3
Connecting and Using the Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±7
Theory of Operation
Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±1
Inverter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±1
Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±2
Switch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±2
Performance Verification
Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±2
Performance Verification Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±4
Adjustment Procedures
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±1
Overview of the Adjustment Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±2
Accessing the Adjustment-Lockout Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±3
Oscilloscope Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±5
Meter Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±8
Replacing the Adjustment-Lockout Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±11
Maintenance
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±1
Preventing ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±1
Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±2
Removal and Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±28
Repackaging Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±40

THS 710 & THS 720 Service Manual

i

Contents

Options

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±1
Electrical Parts List
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8±1
Diagrams
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9±1
Mechanical Parts List
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±1
Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±2

ii	THS 710 & THS 720 Service Manual

Contents

List of Figures

Figure 3±1: Module-level block diagram . . . . . . . . . . . . . . . . . . . . . . .	3±2
Figure 5±1: Location of adjustment-lockout jumper . . . . . . . . . . . . . .	5±4
Figure 5±2: Oscilloscope adjustment setups . . . . . . . . . . . . . . . . . . . . .	5±6
Figure 5±3: Meter adjustment setups . . . . . . . . . . . . . . . . . . . . . . . . . .	5±9
Figure 5±4: Relocating the adjustment-lockout jumper . . . . . . . . . . .	5±11
Figure 6±1: Removing the tilt stand . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±8
Figure 6±2: Installing the tilt stand . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±9
Figure 6±3: Installing a new front-panel label . . . . . . . . . . . . . . . . . . .	6±10
Figure 6±4: Removing the battery door . . . . . . . . . . . . . . . . . . . . . . . .	6±12
Figure 6±5: Assembling a new front cover . . . . . . . . . . . . . . . . . . . . . .	6±13
Figure 6±6: Installing the gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±14
Figure 6±7: Installing the handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±15
Figure 6±8: Removing the display module . . . . . . . . . . . . . . . . . . . . . .	6±17
Figure 6±9: Opening the display cable connector . . . . . . . . . . . . . . . .	6±18
Figure 6±10: Routing cables to the inverter board . . . . . . . . . . . . . . .	6±19
Figure 6±11: Lifting the chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±20
Figure 6±12: Foam pad and hole plug locations on the
back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±21
Figure 6±13: Routing the battery wires . . . . . . . . . . . . . . . . . . . . . . . . .	6±22
Figure 6±14: Removing the main board and switch
flex-circuit assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±24
Figure 6±15: Foam pad locations on the chassis . . . . . . . . . . . . . . . . . .	6±25
Figure 6±16: Reassembling the chassis . . . . . . . . . . . . . . . . . . . . . . . . .	6±27
Figure 6±17: Battery connector location . . . . . . . . . . . . . . . . . . . . . . . .	6±29
Figure 6±18: Bypassing the ON/STBY switch . . . . . . . . . . . . . . . . . . .	6±31
Figure 10±1: Exploded diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±5

THS 710 & THS 720 Service Manual

iii

Contents

List of Tables

Table 1±1: Oscilloscope specifications . . . . . . . . . . . . . . . . . . . . . . . . .	1±1
Table 1±2: DMM specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±6
Table 1±3: General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±8
Table 5±1: Summary of oscilloscope adjustment steps . . . . . . . . . . . .	5±5
Table 5±2: Summary of meter adjustment steps . . . . . . . . . . . . . . . . .	5±8
Table 6±1: Internal inspection check list . . . . . . . . . . . . . . . . . . . . . . .	6±3
Table 6±2: Removal and installation procedures . . . . . . . . . . . . . . . . .	6±6
Table 7±1: TekScope instrument options . . . . . . . . . . . . . . . . . . . . . . .	7±1
Table 10±1: Replaceable standard accessories . . . . . . . . . . . . . . . . . . .	10±6

iv	THS 710 & THS 720 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.
Injury Precautions
Avoid Electric Overload	To avoid injury or fire hazard, do not apply a voltage 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	To avoid electric shock or fire hazard, do not operate this product with covers or
Covers	panels removed.
Do Not Operate in	To avoid electric shock, do not operate this product in wet or damp conditions.
Wet/Damp Conditions
Do Not Operate in	To avoid injury or fire hazard, do not operate this product in an explosive
Explosive Atmosphere	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	If you suspect there is damage to this product, have it inspected by qualified
Suspected Failures	service personnel.

THS 710 & THS 720 Service Manual

v

General Safety Summary

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 The following symbols may appear on the product:

DANGER	Protective Ground	ATTENTION	Double
High Voltage	(Earth) Terminal	Refer to Manual	Insulated

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 Installation Category, Pollution Degree, and Safety Class.

vi	THS 710 & THS 720 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 Dangerous voltages or currents may exist in this product. Disconnect power, With Power On 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.

THS 710 & THS 720 Service Manual

vii

Service Safety Summary

viii	THS 710 & THS 720 Service Manual

Preface

This is the Service Manual for the THS 700 Series TekScope instruments. This manual provides information to troubleshoot and repair the instrument to the module level.

Related Manuals

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

	User Manual	Reference	Programmer Manual
Language	Part Number	Part Number	Part Number
English	070-9247-XX	070-9257-XX	070-9245-XX
French	070-9248-XX	070-9275-XX
German	070-9249-XX	070-9276-XX
Italian	070-9250-XX	070-9277-XX
Korean	070-9251-XX	070-9278-XX
Portuguese	070-9252-XX	070-9279-XX
Spanish	070-9253-XX	070-9280-XX
Simple Chinese	070-9254-XX	070-9281-XX
Standard	070-9255-XX	070-9256-XX
Chinese
Japanese	070-9258-XX

THS 710 & THS 720 Service Manual

ix

Preface

Conventions

In the Performance Verification, Adjustments, and Maintenance 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 ªÐº if no action is required.

1. Choose scope	2. Press this but-	3. Press this
mode or meter	ton on the front	bezel button.
mode.	panel.

4. Press the			5. Use the
bezel button			+/± rocker to set
again until this			the value for a
selection is high-			parameter.
lighted.

6.	7.	Ð
8.	9.	10.

x	THS 710 & THS 720 Service Manual

Specifications

This chapter contains the oscilloscope, DMM, and general specifications for the THS 710 and THS 720 TekScope instruments. All specifications are guaranteed unless noted ªtypical.º Specifications that are marked with the n symbol are checked in the chapter Performance Verification.

All specifications apply to both the THS 710 and THS 720 unless noted otherwise. All specifications assume horizontal MAG is off, unless noted otherwise. To meet specifications, two conditions must first be met:

HThe TekScope instrument must have been operating continuously for ten minutes within the operating temperature range specified.

HYou must perform the Compensate Signal Path operation, accessible through the utility menu, if the ambient temperature changes by more than 5° C.

Table 1±1: Oscilloscope specifications

Acquisition

	Acquisition Modes	Sample (Normal), Peak detect, Envelope, and Average
	Acquisition Rate,	Up to 25 waveforms per second (2 channels, sample acquisition mode,
	typical	MAG on, no measurements)
	Single Sequence	Acquisition Mode	Acquisition Stops After
		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,	1 M ±1% in parallel with 25 pF ±2 pF
	DC Coupled
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between Signal and
		CAT II Environment	300 VRMS
	Common at Input
		CAT III Environment	150 VRMS
	BNC
		For steady-state sinusoidal waveforms, derate at 20 dB/decade above
		100 kHz to 13 Vpk at 3 MHz and above. Also, refer to Overvoltage
		Category description on page 1±10.
	Maximum Voltage	30 VRMS, 42.4 Vpk
	Between Common
	and Earth Ground
	at BNC

THS 710 & THS 720 Service Manual

1±1

Specifications

Table 1±1: Oscilloscope specifications (Cont.)

Inputs

	Channel-to-Channel	100:1 at frequencies ≤50 MHz, measured on MATH Ch1 ± Ch2
	Common Mode	waveform, with test signal applied between signal and common of both
	Rejection, typical	channels, and with the same VOLTS/DIV and coupling settings on each
		channel
	Channel-to-Channel	≥ 100:1 at 50 MHz, measured on one channel, with test signal applied
	Crosstalk, typical	between signal and common of the other channel, and with the same
		VOLTS/DIV and coupling settings on each channel
	Common to Chassis	65 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
	nAnalog Bandwidth	THS 710	THS 720
	at BNC, DC Coupled
		60 MHz at input BNC	100 MHz at input BNC
	(at 5 mV/div, typical)
			(90 MHz above 35° C)
	Peak Detect or Enve-	THS 710	THS 720
	lope Bandwidth,
		50 MHz (1 ms/div or slower)	75 MHz (1 ms/div or slower)
	typical
	Analog Bandwidth	Selectable between 20 MHz or full
	Limit, typical
	Lower Frequency	≤10 Hz at BNC, reduced by a factor of ten when using a 10X passive
	Limit, AC Coupled,	probe
	typical
	Rise Time at BNC,	THS 710	THS 720
	typical
		5.8 ns	3.5 ns
	Peak Detect or Enve-	Captures 50% or greater amplitude of pulses ≥ 8 ns wide (≥ 20 ns wide
	lope Pulse Response,	at 500 ns/div)
	typical
	DC Gain Accuracy	±2% for Sample or Average acquisition mode
	Position Accuracy	±[0.4% ×|(position ×volts/div)| + (0.1 div ×volts/div)]

1±2	THS 710 & THS 720 Service Manual

Specifications

Table 1±1: Oscilloscope specifications (Cont.)

Vertical

	nDC Measurement	Measurement Type	Accuracy
	Accuracy, Average	Average of ≥ 16 waveforms	±[2% ×|reading +
	Acquisition Mode
			(position ×volts/div)| +
			(0.1 div ×volts/div)]
		Delta volts between any two	±[2% ×|reading| +
		averages of ≥ 16 waveforms	(0.05 div ×volts/div)]
		acquired under same setup and
		ambient conditions
	DC Measurement	±[2% ×|reading + (position ×volts/div)| + (0.15 div ×volts/div) +
	Accuracy, Sample	0.6 mV]
	Acq. Mode, typical
	Horizontal
	Sample Rate Range	THS 710	THS 720
		5 S/s to 250 MS/s, in a 1.25, 2.5,	5 S/s to 500 MS/s, in a 1.25, 2.5,
		5 sequence	5 sequence
	Record Length	2500 samples for each channel
	SEC/DIV Range	THS 710	THS 720
	(including MAG)
		10 ns/div to 50 s/div	5 ns/div to 50 s/div
	nSample Rate and	±200 ppm over any ≥ 1 ms time interval
	Delay Time Accuracy
	Delay Time Range	Zero to 50 s
	Trigger
	n Trigger Sensitivity,	Coupling	Sensitivity
	Edge Trigger Type
		DC	0.35 div from DC to 50 MHz,
			increasing to 1 div at 100 MHz
	Trigger Sensitivity,	Coupling	Sensitivity
	Edge Trigger Type,
		NOISE REJ	3.5 times the DC-coupled limits
	typical
		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
	Trigger Level Range	±4 divisions from center of screen
	Trigger Level	±0.2 divisions, for signals having rise and fall times ≥ 20 ns
	Accuracy, typical
	SET LEVEL TO 50%,	Operates with input signals ≥ 50 Hz
	typical
	Width Range, Pulse	99 ns to 1 s, with resolution of 33 ns or approximately 1% of setting
	Trigger Type, typical	(whichever is greater)

THS 710 & THS 720 Service Manual

1±3

Specifications

Table 1±1: Oscilloscope specifications (Cont.)

Trigger

	Width Tolerance	5%, 10%, 15%, or 20%
	Range, Pulse Trigger
	Type, typical
	Sensitivity, Video	Composite video signal with negative sync pulse amplitude from 0.6
	Trigger Type, typical	to 2.5 divisions
	Signal Formats and	Broadcast systems	Supports NTSC, PAL, and
	Field Rates, Video		SECAM
	Trigger Type
		Interlaced	Field 1 or field 2
		Non-interlaced	Any field or any line
		Line Rates	15 kHz to 65 kHz, in five ranges
	Holdoff Range	495 ns to 10 s
	Measurements
	Cursors	Voltage difference between cursors (DV)
		Time difference between cursors (DT)
		Reciprocal of DT in Hertz (1/DT)
	Automated	Amplitude, Burst Width, Cycle Mean, Cycle RMS, Fall Time,
	Measurements	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
	With P6113B Probe
	Analog Bandwidth,	THS 710	THS 720
	DC Coupled
		60 MHz	100 MHz
	Probe Attenuation	10X
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between Probe Tip
		CAT II Environment	300 VRMS
	and Reference Lead
		CAT III Environment	150 VRMS
		For steady-state sinusoidal waveforms, derate at 20 dB/decade above
		100 kHz to 13 Vpk at 3 MHz and above. Also, refer to Overvoltage
		Category description on page 1±10.
	Maximum Voltage	30 VRMS, 42.4 Vpk
	Between Reference
	Lead and Earth
	Ground Using
	P6113B Probe

1±4	THS 710 & THS 720 Service Manual

Specifications

Table 1±1: Oscilloscope specifications (Cont.)

With P5102 Probe

	Analog Bandwidth,	THS 710	THS 720
	DC Coupled
		60 MHz	100 MHz
	Probe Attenuation	10X
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between Probe Tip
		CAT II Environment	1000 VRMS
	and Reference Lead,
	DC Coupled	CAT III Environment	600 VRMS
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between Probe Tip
		CAT II Environment	±1000 VDC
	and Reference Lead,
	AC Coupled	CAT III Environment	±600 VDC
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between Reference
		CAT II Environment	600 VRMS
	Lead and Earth
	Ground	CAT III Environment	300 VRMS
	Single Channel Com-	1000:1 from DC to 100 kHz, measured on either channel, with probe tip
	mon Lead Feed-	and reference lead connected together, and with test signal applied
	through with P5102	between tip/reference and earth ground
	Probe, typical	A 3000 V/ms slew rate results in ≤0.5 division feedthrough, measured
		on either channel, with probe tip and reference lead connected
		together, and with test signal applied between tip/reference and earth
		ground

THS 710 & THS 720 Service Manual

1±5

Specifications

Table 1±2: DMM specifications

General

	Resolution	33⁄ digit, 4000 count full scale reading except as noted
		4
	Input Resistance, AC	10 M ±10%
	or DC Voltage
	Input Capacitance,	≤100 pF
	AC or DC Voltage,
	typical
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between DMM and
		CAT II Environment	600 VRMS
	COM Inputs
		CAT III Environment	300 VRMS
	Maximum Voltage	Overvoltage Category	Maximum Voltage
	Between DMM or
		CAT II Environment	600 VRMS
	COM Input and Earth
	Ground	CAT III Environment	300 VRMS
	DC Voltage
	Ranges and	Range	Resolution
	Resolution
		400.0 mV	0.1 mV
		4.000 V	1 mV
		40.00 V	10 mV
		400.0 V	100 mV
		880 V	1 V
	nAccuracy	±(0.5% of reading + 5 counts)
	Normal Mode	Rejects AC signals by >60 dB at 50 Hz or 60 Hz (user selectable)
	Rejection, typical
	Common Mode	Rejects AC signals by >100 dB at 50 Hz or 60 Hz (user selectable)
	Rejection, typical
	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
		400.0 mV	0.1 mV
		4.000 V	1 mV
		40.00 V	10 mV
		400.0 V	100 mV
		640 V	1 V

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Specifications

Table 1±2: DMM specifications (Cont.)

AC Voltage

	nAccuracy	Input Waveform	Maximum Error
		Sinusoidal waveforms	±(2% of reading + 5 counts)
		Nonsinusoidal waveforms with	±(4% of reading + 5 counts)
		crest factor up to 3
	Bandwidth, typical	≥ 5 kHz for all ranges
	Common Mode	Rejects AC signals by >60 dB at DC, 50 Hz, and 60 Hz
	Rejection, typical
	/Resistance
	Ranges and	Range	Resolution
	Resolution
		400.0	0.1
		4.000 k	1
		40.00 k	10
		400.0 k	100
		4.000 M	1 k
		40.00 M	10 k
	Accuracy, typical	Range	Maximum Error
		All ranges except 40 M	±(0.5% of reading + 2 counts)
		40 M	±(2% of reading + 5 counts) for
			≤60% relative humidity
	Bias Voltage for Full	Range	Full Scale Bias Voltage
	Scale Resistance
		400.0	350 mV
	Measurement, typical
		4.000 k	200 mV
		40.00 k	350 mV
		400.0 k	350 mV
		4.000 M	400 mV
		40.00 M	1.10 V
	Open Circuit Voltage,	Range	Open Circuit Voltage
	typical
		400.0	4.8 V
		All other ranges	≤1.2 V

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Specifications

Table 1±2: DMM specifications (Cont.)

Continuity Check

Indication	An audible tone is generated when measured resistance is below 50 ,
	typical
Open Circuit Voltage,	4.8 V
typical
Test Current, typical	1 mA
Diode Check
Range	Zero to 2 V, measures forward voltage drop of semiconductor junction
Voltage Accuracy,	±25%
typical
Open Circuit Voltage,	4.8 V
typical
Test Current, typical	1 mA
Data Logger
Horizontal Scale	24 hours/div to 30 s/div (4 minutes to 8 days, full scale)
Range

Table 1±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,	35 cd/m2
	typical
	RS-232 Interface
	Device Type	DTE
	RJ-45 Connector	Pin Number	Signal
	Pinout
		1	DCD
		2	DSR
		3	DTR
		4	GND
		5	RXD
		6	TXD
		7	CTS
		8	RTS

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Specifications

Table 1±3: General specifications (Cont.)

Probe Compensator Output

Output Voltage,	5.0 V into ≥ 1 M load
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 Indica-	Low battery message first appears approximately ten minutes before
tion, typical	the instrument powers off automatically
Battery Saver	Standby Time-out and Backlight Time-out extend battery life. Time-out
	ranges from 1 minute to 15 minutes, or off.
Battery Charging	With TekScope instrument operat-	20 hours
Time, typical	ing
	With TekScope instrument turned	20 hours
	off
	In external charger	1.5 hours
External Power	12 VDC nominal, center positive; Operates with input from 10 VDC to
	15 VDC
	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,	All memory is retained indefinitely with battery removed and without
typical	external power applied.
Fuse	This instrument has no user-replaceable fuses
Environmental
Temperature	Operating	±10° C to +50° C
	Nonoperating	±20° C to +60° C
Humidity	+40° C or below	≤95% relative humidity
	+41° C to +50° C	≤75% relative humudity
Altitude	Operating	2,000 m
	Nonoperating	15,000 m

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Specifications

Table 1±3: General specifications (Cont.)

Environmental

Random Vibration	Operating	2.66 gRMS from 5 Hz to 500 Hz,
		10 minutes on each axis
	Nonoperating	3.48 gRMS from 5 Hz to 500 Hz,
		10 minutes on each axis
Drop Resistance,	Survives a 30 in drop onto concrete with only cosmetic damage
typical
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
Certifications and Compliances
Certifications	Listed UL3111-1 and CAN/CSA-C22.2 No. 1010.1-92, complies with
	EN61010-1
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.

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Specifications

Table 1±3: General specifications (Cont.)

Certifications and Compliances

EC Declaration of	Meets the intent of Directive 89/336/EEC for Electromagnetic
Conformity	Compatibility and Low-Voltage Directive 73/23/ECC for Product Safety.
	Compliance was demonstrated to the following specifications as listed
	in the official Journal of the European Communities:
	EN 55011 Class A:		Radiated and Conducted Emissions1 3
	EN 50081±1 Emissions:
		EN 60555±2	Power Harmonics
	EN 50082±1 Immunity:
		IEC 801±2	Electrostatic Discharge
		IEC 801±3	RF Radiated2
		IEC 801±4	Fast Transients
		IEC 801±5	Surge3
	EN 61010±1 Safety
	1	Tektronix-supplied ferrite bead required on instrument end of
		RS-232 cable
	2	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
	3	Applies to instrument operating with Tektronix-supplied AC
		adapter
FCC Compliance	Emissions comply with FCC Code of Federal Regulations 47 CFR, Part
	15, Subpart B, Class A
Adjustment Interval
The recommended adjustment interval is one year

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Specifications

1±12	THS 710 & THS 720 Service Manual

Operator Information

This chapter provides a quick overview of the following topics:

HInternal and external power sources

HUnderstanding the front panel

HConnecting and using the probes

For more detailed information about TekScope instrument operation, refer to the

THS 710 & THS 720 User 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	20 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.

CAUTION. To prevent loss of saved information, set the ON/STBY switch to STBY before removing the battery pack.

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Operator Information

Battery pack

Using External Power For benchtop operation, you can use external power. Attach the AC adapter as shown below.

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.

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.

2±2	THS 710 & THS 720 Service Manual