Tektronix 422 Manuel utilisateur

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IV IA IN I U A L

j

Serial Number 3L

TYPE

422

OSCILLOSCOPE

W ith AC-DC Power Supply

SR6 20,000 end up

Tektronix, Inc.

S.W. Milli an Way • P. O. Box 500 • Beaverton, Oregon 97005 • Phone 644-0161 • Cables: Te tronix

070-0895-00 1268

All Te tronix instruments are warranted

against defective materials and wor man

ship for one year. Te tronix transformers,

manufactured in our plant, are warranted

for the life of the instrument.

Any questions with respect to the war

ranty mentioned above should be ta en

up with your Te tronix Field Engineer.

Te tronix repair and replacement-part

service is geared directly to the field,

therefore all requests for repairs and re

placement parts should be directed to the

Te tronix Field Office or representative

in your area. This procedure will assure

you the fastest possible service. Please

include the instrument Type and Serial or

Model Number with all requests for parts

or service.

Specifications and price change privi

leges reserved.

Copyright © 1968 by Te tronix, Inc.,

Beaverton, Oregon. Printed in the United

States of America. All rights reserved.

Contents of this publication may not be

reproduced in any form without permis

sion of the copyright owner.

CONTENTS

Section 1 Type 422 AC-DC Specification

Section 2 Operating Instructions

Section 3 Circuit Description

Section 4 Maintenance

Section 5 Performance Chec /Calibration

Abbreviations and Symbols

Parts Ordering information

Section 6 Electrical Parts List

Mechanical Parts List Information

Section 7 Mechanical Parts List

Section 8 Diagrams

Mechanical Parts List Illustrations

Accessories

Abbreviations and symbols used in this manual are

based on or ta en directly from IEEE Standard

260 "Standard Symbols for Units", MIL-STD-12B

and other standards of the electronics industry.

Change information, if any, is located at the rear of

this manual.

R"' TV" 422 ^ «» AC-OC P o ^ p p ,,.

Type 422 AC-DC

SECTION 1

TYPE 422 SPECI ICATION

W ith AC-DC Power Supply

Change information, if any, affecting this section will be found at the rear of this manual.

Introduction

The Te tronix Type 422 Oscilloscope is a solid-state

portable instrument that combines small size and light

weight with the ability to ma e precision waveform meas

urements. The instrument is mechanically designed to with

stand the shoc , vibration and other extremes of environ

ment associated with portability. The dual-channel DC-to-

15 megahertz vertical system provides calibrated deflection

factors from 0.01 to 20 volts/division. A X I0 gain feature

in Channel 2 allows each Channel 2 deflection factor to be

increased 10 times and provides a minimum deflection

factor for Channel 2 of 0.001 volt/division in the 0.01 posi

tion (AC-coupled with reduced frequency response). The

trigger circuits provide stable triggering over the full range

of vertical frequency response. The horizontal deflection

system provides calibrated sweep rates from 0.5 second to

0.5 microsecond/division. A X I0 horizontal magnifier

allows each sweep rate to be increased 10 times and pro

vides a maximum sweep rate of 0.05 microsecond/division

in the 0.5 jus position. X-Y measurements can be made by

applying the vertical (Y) signal to either the INPUT 1 or

INPUT 2 connector and the horizontal (X) signal to the

HORIZ IN OR TRIG IN connector (TIME/DIV switch set

to EXT HORIZ).

The Type 422 with AC-DC Power Supply can be op

erated from any one of three power sources; AC line, exter

nal DC, or internal rechargeable batteries. The regulated

low-voltage power supply assures that instrument perform

ance is not affected by variations in internal battery charge

level, applied DC voltage, or AC line voltage and frequency.

Maximum total power consumption is 26 watts for external

DC operation and 30 watts for AC operation. The instru

ment will operate about four hours from the internal bat

teries when fully charged.

This instrument will meet the electrical characteristics

listed in Table 1-1 following complete calibration as given

in Section 5. The performance chec procedure given in

Section 5 provides a convenient method of chec ing instru

ment performance without ma ing internal chec s or

adjustments. The following electrical characteristics apply

over a calibration interval of 1000 hours and an ambient

temperature range of —15° C to +55° C, except as other

wise indicated. Warmup time for given accuracy is 20

minutes.

TABLE 1-1

ELECTRICAL

Characteristic Performance

VERTICAL DEFLECTION SYSTEM

Deflection Factor

Channel 1 or 2 cali

brated range, XI

gain

Without probe 10 millivolts/division to 20 volts/

division in 11 steps. Steps in 1-2-

5 sequence.

With P6012 Probe 100 millivolts/division to 200

volts/division in 11 steps. Steps

in 1-2-5 sequence.

Channel 2 only cali

brated range, X I0

gain

Without probe One millivolt/division to two

volts/division in 11 steps. Steps

in 1 -2-5 sequence.

Characteristic Performance

With P6012 Probe 10 m illivolts/division to 20

volts/division in 11 steps. Steps

in 1-2-5 sequence.

Channel 1 or 2 accu

racy, XI gain

With or without

probe Within 3% of indicated deflec

tion.

Channel 2 only "accu

racy, X10 gain

With or without

probe

+20° C to +30°

C—15° C to +55°

C

Within 4% of

indicated de

flection.

Within 7.5% of

indicated de

flection.

Uncalibrated (variable)

range Continuously variable between

calibrated deflection factor

settings. Extends maximum un

calibrated deflection factor to at

least 50 volts/division.

1-1

Specification—Type 422 AC-DC

Characteristic Performance

Low-Frequency Line

arity 0.15 division or less compression

or expansion of a center-screen

two-division signal when posi

tioned to the top and bottom of

the graticule area.

Bandwidth with Four-

Division Reference

DC input coupling

Channel 1 or 2,

XI gain DC to 15 megahertz or greater

(—3 dB points).

Channel 2 only,

X10 gain DC to five megahertz or greater

(—3 dB points).

AC input coupling

Channel 1 or 2,

XI gain

Without probe Two hertz or less to 15 mega

hertz or greater (—3 dB points).

With P6012 Probe 0.2 hertz of less to 15 megahertz

or greater (—3 dB points).

Channel 2 only,

X10 gain

With or without

probe Five hertz or less to five mega

hertz or greater (—3 dB points).

Step Response

Risetime

Channel 1 or 2,

XI gain 24 nanoseconds or less.

Channel 2 only,

X10 gain 70 nanoseconds or less.

Aberrations

With four-division

pulse centered

vertically

Pea aberrations not to exceed

+3% or —3%; total pea -to-pea

aberrations not to exceed 3%.

With eight-division

pulse centered

vertically

Pea aberrations not to exceed

+5% or —5%; total pea -to-pea

aberrations not to exceed 5%.

Vertical Display Modes

(selected by front-

panel vertical Mode

switch)

Channel 1 only.

Channel 2 only.

Dual-trace, alternate between

channels.

Dual-trace, chopped between

channels.

Added algebraically.

Input Coupling Modes

(selected by front-

panel Input Coupling

switch)

AC (capacitive) coupled or DC

(direct) coupled.

Characteristic Performance

Maximum Input Volt

age

AC and DC input

coupling 300 volts (DC + pea AC). Pea -

to-pea AC less than 300 volts

(one ilohertz or less).

Input RC Characteris

tics

Resistance One Megohm ±2%.

Capacitance 33 picofarads ±1 pF.

Time constant 33 microseconds ±1%.

1 nput Current at +20°

C to +30° C Negligible.

Step Attenuator Balance 0.1 division or less trace shift be

tween calibrated VOLTS/DIV

switch positions.

DC Drift

Drift with time

Short term (with

temperature and

line voltage con

stant)

0.1 division or less during any

minute within first hour after

20-minute warmup.

Long term (temper

ature between +20°

C and +30° C and

line voltage con

stant)

0.2 division or less total during

first hour after 20-minute warm

up.

Drift with line voltage

change (temperature

held constant)

0.1 division or less with line volt

age varied from low line to high

line.

Drift with temperature

(line voltage constant) 0.2 division or less for each 10°

C change in temperature.

Common Mode Rejection

Ratio 100:1 or greater at 50 ilohertz

with optimized setting of Chan

nel 1 and 2 GAIN adjustments at

one ilohertz.

Channel Isolation (at 15

megahertz)

Equal deflection fac

tors At least 100:1.

Unequal deflection

factors At least 10,000:1.

Chopped Mode

Repetition rate 150 ilohertz ±20%.

Time segment from

each channel 2.0 to 4.7 microseconds.

Polarity Inversion (select

ed by Channel 2 IN

VERT switch)

Displayed signal from Channel 2

can be inverted.

1-2

Specification—Type 422 AC-DC

Characteristic Performance

Delay Line Permits viewing of leading edge

of triggering signal (internal trig

gering only).

TRIGGERING

Trigger Source (select

ed by front-panel

TRIGGERING

Source switch)

Internal from both Channel 1

and 2.

Internal from Channel 1 only.

External from signal applied to

TRIG IN connector.

Trigger Coupling (select

ed by front-panel

TRIGGERING

Coupling switch)

AC (capacitive)coupled.

AC (capacitive) coupled with

attenuation of low-frequency

signals.

DC (direct) coupled.

Trigger Slope (select

ed by front-panel

SLOPE switch)

Sweep can be triggered from the

positive-going or negative-going

portion of trigger signal.

Trigger Level LEVEL control allows selection

of the triggering point on the

selected slope of the trigger

signal.

Trigger Mode (select

ed by front-panel

TRIGGERING Mode

switch)

AUTO Mode for triggered sweep

at point selected by LEVEL con

trol when adequate trigger signal

is applied (see Trigger Sensitiv

ity); sweep free runs at sweep

rate selected by TIME/DIV

switch when trigger signal is in

adequate or below 20 hertz.

NORM Mode for triggered sweep

at point selected by LEVEL con

trol when adequate trigger signal

is applied (see Trigger Sensitiv

ity); no trace when trigger signal

is inadequate.

Trigger Sensitivity

(AUTO and NORM

Mode)

Internal

AC 0.2 division of deflection mini

mum, 50 hertz to five mega

hertz; increasing to one division

at 15 megahertz.

AC LF REJ 0.2 division of deflection mini

mum, 50 ilohertz to five mega

hertz; increasing to one division

at 15 megahertz. Will not trigger

on two-division or less sine wave

at 120 hertz or less.

Characteristic Performance

DC 0.2 division of deflection mini

mum, DC to five megahertz; in

creasing to one division at 15

megahertz.

External

AC 125 millivolts minimum, 50

hertz to five megahertz; increas

ing to 0.6 volt at 15 megahertz.

AC LF REJ 125 millivolts minimum, 50 ilo

hertz to five megahertz; increas

ing to 0.6 volt at 15 megahertz.

Will not trigger on 1.25 volt or

less sine wave at 120 hertz or

less.

DC 125 millivolts minimum, DC to

five megahertz; increasing to 0.6

volt at 15 megahertz.

External Trigger Input

RC characteristics 100 ilohms ±3% paralleled by

33 picofarads ±5 pF.

Maximum Input volt

age 250 volts DC + pea AC.

LEVEL control range At least +10 to —10 volts.

TIME BASE

Sweep Rate

Calibrated range

Unmagnified 0.5 second to 0.5 microsecond/

division in 19 steps. Steps in

1-2-5 sequence.

Magnified 50 milliseconds to 0.05 micro-

second/division in 19 steps.

Steps in 1-2-5 sequence.

Uncalibrated (vari

able) range Continuously variable between

calibrated sweep rate settings.

Extends slowest uncalibrated

sweep rate to at least 1.25

seconds/division.

Accuracy

Unmagnified

Over center eight

divisions Within 3% of indicated sweep

rate.

Over any two divi

sion portion with

in center eight

divisions

Within 4% of indicated sweep

rate.

Magnified

Over center eight

divisions Within 5% of equivalent sweep

rate.

1-3

Specification—Type 422 AC-DC

Characteristic Performance

Over any two Within 7.5% of equivalent sweep

division portion rate.

within center

eight divisions

Sweep Length 10.4 to 12.1 divisions.

EXTERNAL HORIZONTAL INPUT

Deflection Factor

X I0 MAG switch

pushed in 10 volts/division.

X I0 MAG switch

pulled out One volt/division.

Accuracy Within 25%.

HORIZ ATTEN Range At least 10:1.

Bandwidth DC to 500 ilohertz or greater

(—3 dB points).

Input RC Characteris

tics 300 ilohms ±10% paralleled by

35 picofarads ±3 pF.

CALIBRATOR

Waveshape Square wave.

Polarity Negative-going with baseline at

zero volts.

Output Voltage

CALIBRATOR jac Two volts pea to pea .

Internal 0.2 volts. Internally connected

to Input Amplifiers in CALI

BRATE 4 DIVISIONS positions

of Channel 1 and 2 VOLTS/DIV

switches.

Repetition Rate One ilohertz.

Accuracy

Voltage +20° C to +30°

C-15° C to +50°

C

CALIBRATOR jac Within 0.5%. Within 1.5%.

Internal Within 1.5%. Within 2.5%.

Repetition rate Within 20%.

Duty Cycle 45% to 55%.

Output Resistance 1.95 ilohms ±3%.

Z AXIS INPUT

Sensitivity Two volt signal blan s trace.

Polarity of Operation Positive-going signal required.

Input Resistance 250 ohms ±10%.

Characteristic Performance

SIGNAL OUTPUTS

Gate

Waveshape Rectangular.

Polarity Negative-going with baseline

near zero volts.

Output voltage 0.5 volt or greater.

Duration Same duration as sweep.

Output Resistance 620 ohms ±10%.

CATHODE-RAY TUBE (CRT)

Graticule

Type Internal with variable edge light

ing.

Area Eight divisions vertical by 10

divisions horizontal. Each divi

sion equals 0.8 centimeter.

Horizontal Resolution 140 lines in 10 divisions.

POWER SUPPLY

AC

Line voltage range

(selected by rear-

panel Power Mode

switch)

115-volts nominal

Operating 92 to 137 volts AC RMS.

Battery charging 92 to 126.5 volts AC RMS.

230-volts nominal

Operating 184 to 274 volts AC RMS. 1

Battery charging 184 to 253 volts AC RMS.

Line frequency 45 to 440 hertz. Derate upper j

line voltage limit linearly to a

maximum of 10% between 50

and 45 hertz.

Maximum power con

sumption 95 to 137

volts line, operating

or charging

30 watts, 0.4 ampere.

DC

Voltage range 11.5 to 35 volts DC with sup

plied DC power cord.

Chassis to external

source potential +200 volts measured from chas

sis to power source.

Maximum Power

consumption 26 watts. Maximum current

(amperes) = 26 + applied DC

voltage.

El L1-4

Specification—Type 422 AC-DC

Characteristic Performance

Battery

Batteries 20 size D nic el-cadmium cells

supplied in battery pac , Te 

tronix Part No. 016-0066-02

(optional accessory).

Charge time (Power

Mode switch set to

CHARGE BATT

115V AC or 230V

AC)

At least 16 hours to reach full

capacity.

Operating time1 (bat

teries charged and

operated at +20° C

to +30° C)

SCALE ILLUM

off (full count

ercloc wise)

At least five hours

SCALE ILLUM

at maximum

(fully cloc wise)

At least 4.5 hours.

TABLE 1-2

ENVIRONMENTAL

NOTE

This instrument will meet the electrical characteristics

given in Table 1-1 over the following environmental

limits. Complete details on environmental test pro

cedures, including failure criteria, etc., can be obtain

ed from Te tronix, Inc. Contact your local Te tronix

Field Office or representative.

Temperature

Without batteries

Operating -15° Cto +55° C

Non-operating -55° C to +75° C.

With batteries

Operating -15° Cto +40° C.

Non-operating -40° C to +60° C.

Altitude

Operating 15,000 feet maximum.

Non-operating Test limit 50,000 feet.

Characteristic Performance

Humidity

Non-operating Five cycles (120 hours) of Mil-

Std-202C, Method 106B. Omit

freezing and vibration. Allow 24

hour post-test drying period at

+25°C ±5°C and 30% to 80%

relative humidity. Limit maxi

mum temperature to +60° C if

tested with batteries.

Vibration

Operating and non

operating 15 minutes along each of the

three major axes at a total dis

placement of 0.025-inch pea to

pea (3.9 g at 55 c/s) with fre

quency varied from 10-55-10 in

one minute cycles. Hold at any

resonant point, or if none, at 55

c/s for three minutes on each

axis.

Shoc

Operating Two guillotine-type shoc s of 30

g, one-half sine, 11-millisecond

duration each direction along

each major axis. Total of 12

shoc s.

Non-operating One guillotine-type shoc of 60

g, one-half sine, 11-millisecond

duration in each direction along

each major axis. Total of six

shoc s.

Electromagnetic Inter

ference (EMI) As Test

ed in Mil-I-6181D

Radiated interference Interference radiated from the

instrument under test within the

given limits from 150 ilohertz

to 1000 megahertz (with mesh

CRT filter installed).

Conducted interfer

ence Interference conducted out of

the instrument under test

through the power cord within

the given limits from 150 ilo

hertz to 25 megahertz.

Transportation

Pac aged instrument Qualifies under National Safe

Transit Commitee test procedure

1 A, Category II.

loperating time applies to new batteries. Ampere-hour capacity

may be reduced by as much as 20% after one year.

1-5

Specification—Type 422 AC-DC

Characteristic Performance

TABLE 1-3

PHYSICAL

Ventilation Safe operating temperature is

maintained by radiant cooling.

Automatic resetting thermal cut

outs in the power supply protect

instrument from overheating.

Warm-up Time 20 minutes for rated accuracy.

Finish Anodized front panel with blue-

vinyl painted aluminum cabinet.

Overall Dimensions

(measured at maxi

mum points)

Height 6 15/16 inches (17.7 centi

meters).

Width 10 5/16 inches (26.2 centi

meters).

Depth (including

front cover) 18 9/16 inches (47.2 centi

meters).

Characteristic Performance

Depth (handle posi

tioned for carrying) 20 5/8 inches (52.4 centi

meters).

Weight

Without battery pac

Without front

cover 20 1/2 pounds (9.3 ilograms).

With front cover

and standard

accessories

23 pounds (10.5 ilograms).

With battery pac

Without front

cover 27 1/2 pounds (12.5 ilograms).

With front cover

and standard

accessories

30 pounds (13.7 ilograms).

STANDARD ACCESSORIES

Standard accessories supplied with the Type 422 are listed

on the last pullout page of the Mechanical Parts List illus

trations. For optional accessories available for use with this

instrument, see the Te tronix, Inc. catalog.

1-6 m