Tektronix 2465 Manual de usuario

Tektronix,

Inc.

P.O.

Box

500

Beaverton, Oregon

97077

070-3832-00

Product Group 38

COMMITTED

EXCELLENCE

PLEASE CHECK FOR CHANGE INFORMATION

AT THE REAR OF THIS MANUAL.

OSCILLOSCOPE

OPERATORS

INSTRUCTION MANUAL

Serial

Number

First Printing

SEP

1982

Revised

AUG

1985

1982

Contents of this publication may not be reproduced in any

form without the written permission of Tektronix, Inc.

Productsof Tektronix, Inc. and its subsidiaries are covered

by U.S. and foreign patents and/or pending patents.

TEKTRONIX, TEK, SCOPE-MOBILE, and are

registered trademarks of Tektronix, Ins. TELEQU

PMENT

is a registeredtrademark of Tektronix U.K. Limited.

Printed in U.S.A. Specificationand price change privileges

are reserved.

INSTRUMENT SERIAL NUMBERS

Each instrumenthas a serial number on a panel insert, tag,

or stamped on the chassis. The first number or letter

designates the country of manufacture. The last five digits

of the serial number are assigned sequentially and are

unique to each instrument. Those manufactured in the

United States have six unique digits. The country of

manufactureis identified as follows:

BOO0000 Tektronix, Inc., Beaverton, Oregon, USA

00000 Tektronix Guernsey, Ltd., Channel Islands

200000 Tektronix United Kingdom, Ltd., London

300000 SonyITektronix, Japan

700000 Tektronix Holland,

NV,

Heerenveen,

The Netherlands

Certificateof the Manufacturer/lmporter

We hereby certify that the

2465

OSCILLOSCOPE

AND ALL INSTALLEDOPTIONS

complies with the RF Interference Suppression requirements of Amtsbl.-Vfg 104611984.

The German Postal Service was notifiedthat the equipment is being marketed.

The German Postal Service has the right to re-test the series and to verify that it complies.

TEKTRONIX

Bescheinigungdes Herstellersllmporteurs

Hiermit wird bescheinigt, daA derldieldas

2465

OSCILLOSCOPE

AND ALL INSTALLEDOPTIONS

in ~bereinstimmungmit den Bestimmungender Amtsblatt-Verfugiing lO46Il984 funkentstort ist.

Der Deutschen Bundespost wurde das lnverkehrbringen dieses Gerates angezeigt und die

Berechtigung zur ijberprufung der Serie auf Einhaltender Bestimmungeneingeraumt.

TEKTRONIX

NOTICE to the userloperator:

The German Postal Service requires that Systems assembled by the operatorluser of this

instrument must also comply with Postal Regulation, Vfg. 104611984,Par.

Sect. 1.

HlNWElS fijr den BenutzerIBetreiber:

Die vom Betreiber zusammengestellte Anlage, innerhalb derer dies Gerat eingesazt wird, mu8

ebenfalls den Voraussetzungen nach Par. 2, Ziff. 1 der Vfg. 104611984 genugen.

NOTICE to the userloperator:

The German Postal Service requires that this equipment, when used in a test setup, may only be

operated if the requirementsof Postal Regulation,Vfg. 104611984, Par. 2, Sect. 1.7.1 are complied

with.

HlNWElS fijr den BenutzerIBetreiber:

Dies Gerat darf in MerSaufbauten nur betrieben werden, wenn die Voraussetzungen des Par.

Ziff. 1.7.1 der Vfg. 104611984 eingehalten werden.

This Document was scanned from the original

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This Document is a complete Scan from the original

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2465 Operators

TABLE OF CONTENTS

Page Page

.................

LISTOF ILLUSTRATIONS

SECTION 5 OPERATOR'S CHECKS AND

........................

LIST OF TABLES

...

............

OPERATORS SAFETY SUMMARY

111

SECTION

SPECIFICATION

INTRODUCTION

.............

1-1

PERFORMANCE CONDITIONS

...

1-1

SECTION 2

SECTION

SECTION 4

PREPARATION FOR USE

SAFETY

...................

2-1

LINE VOLTAGE SELECTION

....

2-1

LINE FUSE

.................

2-1

POWER CORD

...............

2-1

INSTRUMENTCOOLING

.......

2-1

START.UP

..................

2-2

REPACKAGING FORSHIPMENT

2-2

CONTROLS. CONNECTORS.

AND INDICATORS

POWER AND DISPLAY

.........

3-1

VERTICAL

.................

3-2

HORIZONTAL AND DELTA

MEASUREMENT

.............

3-4

..................

TRIGGER 3-7

REARPANEL

...............

3-9

..........

READOUT DISPLAY 3-11

OPERATING CONSIDERATIONS

GRATICULE

................

4-1

TIME AND VOLTAGE

............

MEASUREMENTS 4-1

...............

GROUNDING 4-1

........

SIGNAL CONNECTIONS 4-2

INPUT-COUPLINGCAPACITOR

PRECHARGING

..............

4-2

......

EXTERNALTRIGGERING 4-2

ADJUSTMENTS

.............

INTRODUCTION 5-1

..............

INITIALSETUP 5-1

TRACE ROTATION

...............

ADJUSTMENT 5-1

...

ASTIGMATISM ADJUSTMENT 5-2

AUTO DC BALANCE

...............

ADJUSTMENT 5-2

PROBE LOW-FREQUENCY

.............

COMPENSATION 5-2

MATCHINGCHPrNNEL2DELAY

5-3

..........

AMPLITUDE CHECK 5-4

..............

TIMINGCHECK 5-4

SECTION

BASICAPPLICATIONS

INDEX OF PROCEDURES

.......

6-1

.....

VOLTAGE MEASUREMENT 6-1

VOLTAGE RATIO

............

6-2

ALGEBRAIC ADDITION AND

ELIMINATING COMMON-MODE

SIGNALS

..................

6-3

TIME INTERVAL

.............

6-4

FREOUENCY

...............

6-4

TlME DIFFERENCE BETWEEN

TWO TIME-RELATED PULSES

...

6-5

TIME RATIO

................

6-5

PHASE DIFFERENCE BETWEEN

TWOTIME-RELATEDSIGNALS

6-6

SMALL-ANGLEPHASE

DIFFERENCE

...............

6-6

DELAYED-SWEEPOPERATION

...

6-7

SECTION

OPTIONS AND ACCESSORIES

.............

INTRODUCTION 7-1

.................

OPTION 11 7-1

.................

OPTION 1R 7-1

POWER CORD OPTIONS

........

7-1

.....

STANDARDACCESSORIES 7-2

OPTIONAL ACCESSORIES

......

7-2

APPENDIX A POWER-UP TESTS

KERNELTESTS

..............

A-I

CONFIDENCETESTS

..........

A-I

CHANGE INFORMATION

2465

Operators

LIST OF ILLUSTRATIONS

Figure Page

...............................................

The 2465 Oscilloscope iv

2-1 Line selector switch. line fuse. and detachablepower cord

........................

2-2

............................................

3-1 Power and display controls 3-1

..........................

3-2 Vertical controls and CH 1OR

and CH 2 connectors 3-2

3-3 Channel

and Channel 4 controls and connectorsand CALIBRATOR output

..........

3-3

.................................

3-4 Horizontal and delta measurementcontrols 3-4

..........................................

3-5 Trigger controls and indicators 3-7

.......................................

3-6 Rear-panelcontrols and connectors 3-10

.............................................

3-7 Readout display locations 3-11

........................................

4-1 Graticule measurement markings 4-1

.......................................

1 Probe low-frequency compensation 5-3

Table

...............................................

Instantaneousdc levels 6-1

.....................................................

Voltage ratios 6-2

.......................................

Eliminating common-modesignals 6-3

.................................................

Measuringrise times 6-4

..................

Time difference betweentwo time-related pulses (cursormethod) 6-5

.............................................

Time ratios (dutycycles) 6-6

.............................

Phase difference betweentwo time-related signals 6-7

...........................................

Small-angle phase difference 6-7

Time difference betweentwo time-related pulses (delayed-sweepmethod)

.............

6-9

LIST

TABLES

Page

..............................................

Electrical Characteristics 1-2

Environmental Characteristics

..........................................

1-9

MechanicalCharacteristics

.............................................

1-10

Voltage. Fuse. and Power-Cord Data

......................................

2-3

Confidence Test Numbers and Descriptions

.................................

A-1

2465

Operators

OPERATORS SAFETY SUMMARY

The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings

andcautions willbe found throughout themanual wherethey apply and do not appear in thissummary.

Terms in This Manual

CAUTION statements identify conditions or practices

that could result in damage to the equipment or other

property.

WARNING statements identify conditions or practices

that could result inpersonal injury or loss of life.

Terms as Marked on Equipment

CAUTION indicates

personal injury hazard not imme-

diately accessible

one reads the markings, or

hazard to

property, includingthe equipment itself.

DANGER indicates

personal injury hazard immediately

accessible

one reads the marking.

Symbols in This Manual

This symbol indicates where applicable

cautionary or other information

to be

/;\

found. For maximum input voltage

see

Table

1-1.

Symbols as Marked on Equipment

DANGER

High voltage.

Protectiveground (earth)terminal.

ATTENTION

Refer to manual.

Power Source

This product

intended to operate from

power source

that does not apply more than

250

volts rms between the

supply conductors or between either supply conductor and

ground. A protective ground connection by way of the

grounding conductor in the power cord

essential for safe

operation.

Grounding the Product

This product

grounded through the groundingconductor

of the power cord. To avoid electrical shock, plug the

power cord into

properly wired receptable before con-

necting to the product input or output terminals. A

protective ground connection by way of the grounding

conductor inthe power cord

essential for safe operation.

Danger Arising From Loss of Ground

Upon loss of the protective-groundconnection, all acces-

sible conductive parts (including knobs and controls that

may appear to be insulating)can render an electricshock.

Use the Proper Power Cord

Use only the power cord and connector specified for

your product.

Use only

power cord that

ingood condition.

For detailed information on power cords and connectors

see Table

2-1.

Use the Proper Fuse

To avoid fire hazard, use only

fuse of the correct type,

voltage rating and current rating as specified in the parts

list

for your product.

Do NotOperate in Explosive Atmospheres

To avoid explosion, do not operate this product in an

explosive atmosphere unless

has been specifically cer-

tified for such operation.

Do Not Remove Covers or Panels

avoid personal injury, do not remove the product

covers or panels. Do not operate the product without the

covers and panels properly installed.

iii

2465

Operators

The

2465

Oscilloscope.

Section

1-2645

Operators

SPECIFICATION

INTRODUCTION

The TEKTRONIX 2465 Oscilloscope is a portable 300-

MHz instrument having a four-channel vertical deflection

system. Channel 1 and Channel 2 provide calibrated

deflectionfactors from 2 mV per division to 5 V per division.

For each of these channels, input impedance is selectable

between two values: either 1 MR in parallel with 15 pF, or

50R internal termination. Input-signal coupling with 1-MR

impedance can be selected as either AC or DC. Channel 3

and Channel 4 have deflection factors of either 0.1 V or

0.5 V per division. Each of these channels has an input

impedance of 1 MR in parallel with 15pF, with DC input-

signalcoupling.Trigger circuitsenable stable triggeringover

the full bandwidthof the vertical system.

The horizontal deflection system provides calibrated

sweepspeeds from 1.5 s per divisionto 500 ps per division.

Drivefor the horizontaldeflection system is obtained from a

choiceof A,

delayed, A alternatedwith Bdelayed sweeps,

or CH 1 (for the X-Y display mode).

The 2465 incorporates alphanumeric crt readoutsof the

verticaland horizontalscale factors, the trigger levels, time-

difference measurement values, voltage-difference

measurement values, and certain auxiliary information.

The 2465 Oscilloscope is shipped with the following

standard accessories:

Probe packages

Snap-lock accessories pouch

Zip-lock accessories pouch

Operators manual

Power cord(installed)

2-A, 250-V fuse

Clear plastic crt filter

Blue plastic crt filter (installed)

Front-panelcover

Operators pocket referencecard

For part numbers and further information about both

standard and optional accessories, refer to the "Options

and Accessoriesnsection (Section

of this manual. Your

Tektronix representative, local Tektronix Field Office, or

Tektronix product catalog can also provide accessories

information.

PERFORMANCE CONDITIONS

The following electrical characteristics (Table 1-1) are

valid for the 2465 when it has been adjusted at an ambient

temperaturebetween

20°C and +30°C, has hadawarm-

up period of at least 20 minutes, and is operating at an

ambient temperature between

C and

C (unless

otherwisenoted).

Items listed in the "Performance Requirements" column

are verifiablequalitativeor quantitativelimitsthat definethe

measurement capabilities of the instrument.

Environmentalcharacteristicsare given in Table 1-2. The

2465 Oscilloscopemeetsthe environmentalrequirementsof

MIL-T-28800Cfor Type

Ill,

Class

StyleCequipment, with

the humidity and temperature requirements defined in

paragraphs 3.9.2.2, 3.9.2.3, and 3.9.2.4.

Mechanical characteristics of the 2465 are listed in

Table 1-3.

REV

AUG 1985

Specification-2465 Operators

Table

1-1

Electrical Characteristics

VERTICAL DEFLECTION SYSTEM-CHANNEL

AND CHANNEL

Characteristics

DeftectEn Factor

Range

Performance Requirements

2 mVper division to 5 V per division in

1-2-5sequence of 11steps.

Accuracy

to +35O

Within

_+2%

at any VOLTSIDIV setting for a

or 5-division signal

centered on the screen.

-15°C to +15"C and +35"C to +55"C Add 1

C-to-

C specification.

AV Accuracy (usingcursors over entire

graticulearea)

5°C to +35OC

(1.25%of reading

0.03 division

signal aberration).

-1 5"

and +35"

to +55"

Add 1

of reading to

5°~-to-+350~specification.

AV Range

---

times the VOLTSIDIV switch setting.

Variable Range Continuously variable between VOLTSIDIV switch settings. Extends

deflection factor of the 5 V per division settingtoat least 12.5 V

per division.

Frequency Response

-1 5'~to +55"~ 2 mV

DCto 100 MHz

Six-division reference signal from

terminated 504 system, with

VAR VOLTSIDIV control in calibrated detent.

VOLTSIDIV

setting

AC Coupled Lower -3 dB Point

X Probe

5 mV or greater

less.

-3

dB bandwidth

with standard-accessory

probe or internal

50-SZ termination

1OX Probe

-4.7

dB bandwidth

with 50-SZ external

termination on

1-MO

input

DCto 300 MHz

DC to 250

MHz

1 Hz or

less.

DC to 300 MHz

to 250 MHz

Step Response

Rise Time 1.17 ns or

less

for VOLTSIDIV switch settings of 5 mV and up

(calculated).

3.5 ns or less for VOLTSIDIV switch setting of 2 mV (calculated).

.Risetime calculated from: bandwidth x rise time

0.35.

Common-modeRejection Ratio (CMRR) At least 20:1 at 50 MHz for common-mode signals of eight divisions

or less, with VAR VOLTSIDIV control adjustedfor best CMRR at 50

kHz at VOLTSIDIV switch settingsfrom 5 mV to 5 V. At least 20:1 at

20 MHz for the 2 mV switch setting.

REV

JAN

1984

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