Tektronix 475 Manual de usuario

IEIGrcnix

Teklronix, lnc.

P.O. Box 500

Eeaverlon, Oregon gTOTl INSTtrUCT ION

COMMTTTED TO EXCELLENCE

MANUAL

First Printing JULY 1976

07G2039.00 Serial Number

475

oscrLLos

AND

DM44 DIGITAL

MULTIMETER

OPERATORS

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reserved. Contents ol this publication may not be

reproduced in any form without the written

permission of Tektronix, Inc.

Products of Tektronix. lnc. and its subsidiaries

are covered by U.S. and loreign patents and/or

pending patents.

TEKTRONIX, TEK, SCOPE-MOerLe, anO @

are registered trademarks of Tektronix, lnc.

TELEQUIPMENT is a registered trademark of

Tektronix U.K. Limited.

Printed in U.S.A. Specification and price change

privileges are reserved.

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TABLE OF CONTENTS

BASIC OSCILLOSCOPE DISPLAYS Page

LIST OF ILLUSTRATIONS

LIST OF TABLES

CONTROLS, CONNECTORS. AND

INDICATORS

VEBTICAL

DISPLAY

oM44

TRIGGER

HORIZONTAL, CALIBRATOR, AND POWER

BEAR PANEL

LEFT SIDE PANEL

RIGHT SIDE PANEL

NORMAL SWEEP DISPLAY

MAGNIFIED SWEEP DISPLAY

DELAYED SWEEP DISPLAY

MIXED SWEEP DISPLAY

X.Y DISPLAY

SINGLE SWEEP DISPLAY

'16

'12

RESISTANCE

VOLTS

TEMPERATURE

Accuracy Check

TIME AND 1/TIME

APPLICATIONS AND MEASUREMENTS

PRELIMINARY

Signal Ground

Input Coupling Capacitor Precharging

BEV A JAN 1981 475/DM44 Operators

Page

BEFORE OPERATING

INTRODUCTION

SAFETY INFORMATION

OPERATING VOLTAGE

Line Voltage Selection

Regu lating Range Selection

OPTIONS DM44 DISPLAYS AND MEASUREMENTS

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TABLE OF CONTENTS (cont)

APPLTCATTONS AND MEASUREMENTS (cont) Page APPLTCATIONS AND MEASUREMENTS (conr) Page

OPERATOR'S ADJUSTMENTS AND CHECKS 29

Trace Rotation 29

Probe Compensation 29

Vertical Gain Check 30

Basic 475 Timing Check 30

DM44 Timing Check 30

External Horizontal Gain Check 31

PEAK.TO-PEAK VOLTAGE

MEASUREMENTS-AC

INSTANTANEOUS VOLTAGE

MEASUREMENTS-DC

ALGEBRAIC ADDITION

COMMON MODE REJECTION

AMPLITUDE COMPARISON

MEASUHEMENTS

TIME.DURATION MEASUREMENTS

FREQUENCY MEASUBEMENTS

RISETIME MEASUBEMENTS

TIME DIFFERENCE BETWEEN TWO

PULSES FROM DIFFERENT SOURCES

TIME COMPAHISON MEASUHEMENTS

PHASE DIFFERENCE MEASUREMENTS

HIGH RESOLUTION PHASE DIFFERENCE

MEASUREMENTS

PULSE JITTER MEASUREI\,4ENTS

DELAYEO OR MIXED SWEEP

MAGNIFICATION

Magniried Sweep Starts Alter Delay

Triggered Delay Sweep Magnilication

Besic 475 Delayed or Mixed Sweep Time

Measuremenls

TIME DIFFERENCE BETWEEN REPETITIVE

PULSES (BASTC 475)

TIME DURATION MEASUSEMENTS

(BASTC 475)

FREQUENCY MEASUREMENTS (BASIC 475)

TIME DIFFERENCE BETWEEN TWO PULSES

FROM DIFFEHENT SOUHCES (BASIC 475)

RtSETtME (BAStC 475)

Mrx (BASTC 475)

I 475/OM44 Operators REV A JAN 1981

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TABLE OF CONTENTS (cont)

OM44 Delayed or Mixed Sweep Tlme

Meeaurements

TIME DIFFEBENCE BETWEEN REPETITIVE

PULSES (DM44)

TIME DURATION MEASUREMENTS (DM44)

FREQUENCY MEASUBEMENTS (DM44)

TIME DIFFERENCE BETWEEN TWO PULSES

FFOI\,,l DIFFERENT SOURCES (DM44)

RTSETTME (DM44)

M rx (DM44)

OPERATOR'S SPECIFICATIONS

475 OSCILLOSCOPE

VERTICAL

TRIGGERING

DIFFEHENTIAL TIME IVEASUREMENT

(BASTC 475)

DIFFERENTIAL TIME IVEASUREMENT

(oM44)

HORIZONTAL

x-Y

CALIBRATOF

Page

54 OPERATOR'S SPECIFICATIONS (cont) Page

Z AXIS INPUT

OUTPUTS

AC POWER SOURCE

ENVIRONMENTAL

DM44 DIGITAL MULTIMETER

RESISTANCE

TIME

1/TIME

TEMPERATUBE

DC VOLTAGE

ACCESSORTES

STANDAHD ACCESSORIES

OPTIONAL ACCESSORIES

OPTIONS

OPTION 1

OPTION 4

OPTION 7

475/OM44 Operalors It

REV A JAN 1981

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LIST OF ILLUSTRATIONS

Page Page

Fig. 1

Fig.2

Fig.3

Fig.4

Fi9.5

Fig. 6

Fig. 7

Fis

Fig

Fis

Fig

Fis

Fig

Regulating range selector and line

fuse. 3

Vertical controls, connectors, and

indicators. 4

Display and DM44 controls,

connectors, and indicators. 6

Trigger controls, connectors, and

indicators. I

Trigger controls, connectors, and

indicators. 10

Horizontal, calibrator, and power

controls, connectors, and indicators. 12

Rear panel and lelt side panel controls,

connectors, and indicators. 15

Resistance. 21

Volts. 23

Temperature. 25

Probe compensation. 29

Basic 475 timing check. 30

DM44 timing check. 31

Peak-to-peak voltage of a waveform. 32

lnstantaneous voltage measurements. 33

Algebraic addilion. 35

Common-mode rejection.

Time duration.

Risetime.

Time difterence between two pulses

from dilferent sources.

Phase dilference.

High-resolution phase dif ference.

Pulse jitter.

Delayed sweep magnif ication.

Time dilference between repetitive

pulses.

Time duration.

Time difference between two pulses

lrom dilferent sources.

Risetime.

Time ditlerence between repetitive

pulses.

Time duration and frequency

measurements.

Time dillerence between two pulses

from diflerent sources.

Riselime.

Fig. 17

Fig. 18

Fig. 19

Fig. 20

F ig. 21

Fiq.22

Fig.23

Fig.24

Fig.2s

Fig. 26

Fig.27

'11

'13

Fis 28

Fig. 30

Fig. 31

Fig. 32

475/OM44 Operators

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TABLE 1 Regu lating Ranges

TABLE 2 Resistance Ranges

TABLE 3 Volts Ranges

LIST OF TABLES

Page

TABLE 4 Centigrade to Fahrenheit Conversion 26

TABLE 5 DM44 Delayed Sweep Oisplays 54

Page

@415/Dln44 Operalors

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2039-12

2039-t5

475 Oscilloscope with DM44 Dlgital Multlmeter.

475/DM44 Operalors @

Basic 475 Oscilloscope.

tt-!

t3: I

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The Tektronix 475 Oscilloscope is a dual-channel

portable instrument. The dual-channel dc-to-200 MHz

vertical system provides ca librated deflection factors lrom

2 millivolts to 5 volts,/division. The sweep trigger circuits

are capable of stable triggering over the lull bandwidth

capabilities of the vertical detlection system. The horizon-

tal dellection system provides calibrated sweep rates trom

0.5 second to 0.0'l microsecond/division along wilh

delayed sweep features lor accurate relative-time

measurements. A X1O magnifier extends the calibrated

sweep rate to 1 nanosecond/division. The instrument

operales over a wide variation of line voltages and

frequencies. Maximum power consumption is about

100 watts.

The Tektronix DM44 Digital Multimeter measures O

ohm to 20 megohms, 0 dc vott to 1200 dc volts (+ or -), or

(using the temperature probe) -55oC to +150"C. The

measurement is displayed on a 3-1/2 digital display while

the oscilloscope operates normally.

BEFORE OPERATING

The digital multimeter and oscilloscope combine to

provide a digital readout ot the time between any two

points on the oscilloscope display. Both time measure-

ment points are displayed on the crt at the same time. The

1/TIME function can provide direct measurement ol

frequency.

SAFETY INFORMATION

The instrument is designed to operate lrom a single-

phase power SOUrce with one of the current-carrying

conductors (the Neutral Conductor) at ground (earth)

potential. Operation lrom power sources where both

current-carrying conductors are live with respect to

ground (Such as phase-to-phase on a three-wire system)

is not recommended, since only the Line Conductor has

over-current (tuse) protection within the instrument.

The instrument has a three-wire power cord with a

three-terminal polarized plug for connection to the power

source and safety-earth. The ground (earth) terminal of

the plug is directly con nected to the instrument rrame. For

electric-shock protection, insert this plug only in a mating

outlet with a salety-earth contact.

@475/DM44 Operators

INTRODUCTION

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caurtoll

Line vollage Selection

This instrument operates from either a 11s-voll or a

230-volt nominal line voltaqe source, 48 to 440 hertz. To

converl from one nominal line voltage range to the other,

move the Line Voltage Selector switch (located on side

panel) to indicate the correct nominal voltage. A 1.1s-to-

230 volt adapter may be required forthe line-cord plug. Be

sure to use the correct line luse lor the line voltage

selected (see Table 1).

Regulaling Range Seleclion

The Regulating Range Selector assembly (located on

the rear panel) is set for one of the line voltage ranges

shown in Table '1 . lt also contains the line ruse for overload

protection.

To change the regulating range:

'1. Disconnect the inslrument lrom the power source

2. Loosen the two captive screws that hold the cover

on the selector assembly; then pull to remove the cover.

3. Pull out the range selector switch bar (see Fig. l).

Select a range from Table 1 which is centered about the

average line voltage. Slide the bar to the desired position

and plug it in. Push the cover on and tighten the screws.

TABLE 1

Regulating Ranges

Regulating Range

Range Selector

Switch Position

LO (Switch bar in

lower holes) 198 to 242 volts

M (Switch bar in

middle holes)

Hl (Switch bar in

upper holes)

Fuse Size

230-Volls

Nominal

216 to 264 volts

0,75 A 3AG

Fast-blow

11s-Volts

Nominal

99 to '121 volts

104 to'126 volts

108 to 132 volts

,I ,5 A 3AG

Fast-blow

475/DM44 Operalors

OPERATING VOLTAGE

This instrument may be damaged it opercted with

the line voltage selector switch or the rcgulating

rcnge selector set for the wrong applied line voltage

ot il the wrong line luse is used.

207 to 253 volts

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