Tektronix 7B53AN, 7B53A Service Manual

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7B53A

THE

CHECK

REAR

Fi3R

THlS

CHANGE

MANUAL,

"P853AI7B53AN

fNFOT"IMA"I"ION

Tektranlx,

F'-0.

Box

50Q

Beavertan,

070-1

342-02

Product

Group

tnc.

Oregon

970n

DUAL

TIME

INSTRUCTION

BASE

MANUAL

First

Printing

Revised

MAY

SEP

988

1980

7B53A

Contents of this form without the written permission

"41972,

1980

Tektronix, fne.

publication may not be reproduced

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rights reserved.

Tektronix, Inc.

any

Products

TEKTRONiX,

registered trademarks

Printed are

Each instrument

designates the country

unique to each instrument.

United States have

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US,

and foreign patents and/or pending patents.

TEK,

registered trademark of Tektronix

t1.5,A.

Spcification

and

its

subsidiaries are cgvered

SCOPE-MOBILE, and

Tekrronix. Inc

U.K.

and

price change priviteges

resewed.

INSTRUMENT

has

starnm on the chassis, The the, serial nurnbr are assigned sequentially

identified as follows:

SERIAL

a serial number

manufacture.

Those manufaciur& in the

six

unique digits. Tha

NUMBERS

on a panel

first

"i"hs

IELE%MLNI

Limited,

inseft, tag,

numwr or letter

last

five

digits

and

are

country

BOOQOOO

100000

ZOOOOQ

300000

7OOQOQ

Tektronix, Tektronix Guernsey, Ltd,, Channel isrands "Taktronix Unit& Kingdom, ttd., Landon Sonynektronix, Tektranix

The Netherlands

Inc., Beave~on,

Japan

Holland,

NV,

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Orwon,

USA

TABLE

7B53A

OF CONTENTS

Page Page

LIST OF ILLUSTRATIONS LIST OF SABLES OPERATORS SAFETY SUMMARY SERVICE SAFETY SUMMARY

Section

7Be remaining portion of this Table of Contents lists the servicing instructions use by qualified personnel only do not perform any operating instructions unless qualified to do so

Section

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

SPECIFICATION

OPERATING INSTRUCTIONS

Controls and Connectors Operating Checkout General Operating Instructions Applications 2-1 3

Repackaging for Shipment

sewicing other than that called out in the

THEORY OF OPERATION..

Simplified Block Diagram Circuit Operation 3-3

Main Trigger Preamp

Main Trigger Generator (SN

Up 7B53A Only) 3-4

Main Trigger Generator (SN 8209999

Below) Main Sweep Generator Delayed

(SN B210000 & Up 7B53A Only)

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

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

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

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

........

...........

2-1 2-1

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

.......

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

..........

These servicing instructions are for

To avoid electrical shock.

...........

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

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

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

B210000

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

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

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

Trigger Generator

.....

2-3 2-6

2-20

3-1 3-1

3-4

3-7 3-9

3-12

iii

vii

Section 3 'THEORY OF OPERATION

Section

Section 5 MAINTENANCE

Section

Section 7 REPLACEABLE ELECTRICAL PARTS

Section

(cont'd)

Delayed Trigger Generator (SN 8209999 & Below)

Delayed Sweep Generator Horizontal Preamp Readout Switching 3-18

CALIBRATION

Test Equipment Required PART 1 PERFORMANCE CHECK Trigger System Check Horizontal System Check PART 2 ADJUSTMENT Trigger System Adjustment Horizontal System Adjustment

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

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

.........

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

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

...........

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

...........

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

..........

.......

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

Preventive Maintenance Troubleshooting Corrective Maintenance

OPTIONS

DIAGRAMS AND CIRCUIT BOARD DESCRIPTIONS

REPLACEABLE MECHANICAL PARTS

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

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

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

....

3-17

4-21 4-24

5-1 5-1 5-2 5-4

6-1

REV

DEC

1982

Fig.

7B53A

No.

Page

Fig.

No.

Page

7B53N7B53AN Dual Time Base Location of release latch.

Front-panel controls and connectors. Frequency range of each COUPLING

switch position.

Effect of LEVEL control and SLOPE switch

on CRT display. Composite Area of graticule used for accurate time

measurements. Operation of Sweep Magnifier. (A) Intensified Sweep display; (B) Delayed

Sweep display. Typical Mixed Sweepdisplay (DELAY TIME

MULT dial set to 3.55).

DELAY

3.55. Measuring the time duration between

points on a waveform. Measuring risetime. Measuring time difference using delayed

sweep

Using delayed sweep for magnification. Displaying a complex signal using delayed

sweep Measuring pulse jitter. 7B53A/7B53AN Simplified Block Diagram. 3-2 Trigger Preamp and Input Switching Block

Diagram.

Main Trigger Generator Block Diagram (SN

Main Sweep Generator Block Diagram. Delayed Trigger Generator Block Diagram

(SN B210000 and up 7B53A only). Delayed Trigger Generator Block Diagram

(SN Delayed Sweep Generator Block Diagram. 3-15

Horizontal Preamp Block Diagram.

Location of Delayed Gate Out and Variable Selector multi-pin connectors.

"TIME MULT dial. Reading shown

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

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

B210000 and up 7B53A only).

B209999 and below).

B209999and below).

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

T'ime/Division switch.

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

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

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

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

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

.......

...........

......

.......

.....

...........

.....

...........

........

...

....

.viii

2-1 2-2

2-7

2-9 2-10

2-1 1 2-71

2-12

2-15 2-16

2-17 2-18

2-19 2-20

3-5

3-6

3-8 3-10

3-13

3-14

3-17

4-2

4-2 Typical delay time error measurement. 4-3 Typical Delay Time Error Figures.

4-4 Allowable Delay Time Error. 4-17

4-5 Typical CRT display when checking sweep

length..

4-6

5-1 Location of pins on interface connector.

5-2 Cam Switch Removal.

The illustrations in Section 8 are located near their associated diagrams on the foldout page.

8-1 Electrode configuration for

8-2

8-3 Partial Al--.Interface circuit board

8-4 Partial

8-5 A2-Source Switch circuit board

8-6 A3-.-Coupling Switch circuit board

8-7 Partial

8-8 Partial

8-9 Partial

8-10 Partial

8-1 1 AS-Mode Switch circuit board. 8-12 Partial

8-13

8-14 Partial

Typical Sweep Start and Dly'd Sweep Stop.

semiconductors in the instrument.

Location of circuit boards in the 7B53A/7B54AN.

component locator (SN

component locator (SN 8089999 and

below).

component locator.

component locator

(SN

component locator (SN 8209999 and below).

component locator (SN

component locator (SN below).

component locator (SN A7--Delayed Trigger Switch circuit board component locator.

component locator (SN 8209999 and below).

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

CRTdisplayfor adjustment of DIy'd

Al--Interface circuit board

A4----Trigger circuit board

7B53A only

B210000 and up).

A4-Trigger circuit board

A6-.-Sweep circuit board

A6---Sweep circuit board

A4.--Trigger circuit board

7B53A only

B210000 and up).

A4---Trigger circuit board

.........

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

B090000 and up).

8089999 and

.....

....

4-16 4-17

4-25

4-26 5-3 5-7

JUN

1980

Fig.

7B53A

No.

Fig.

No.

Partial A6--Sweep circuit board component locator (SN 8090000 and up). Partial component locator (SN 3089999 and below).

on1 y) component locator.

A8---Readout circuit board component locator.

A6-Sweep circuit board

Partial

Al--Interface circuit board (7653A

A1 --Interface circuit board

Partial (7653AN only) component locator.

(7853A only)

Partial component locator (SN 8090000 and up).

A6--Sweep circuit board

LIST

Table

No.

8-21 Partial A6---Sweep circuit board

component locator (SN 8089999 and below).

8-22

8-23

8-24

8-25

Partial AG.--Sweep circuit board component locator Location of adjustments in the 7653A/7853AN (SN 6209999 and below). Location of adjustments in the (SN 8210000 and up).

Location of adjustments in the

7853A/7 B53AN.

(SN

8090000 and up).

TABLES

Page

7853A

Electrical Environmental Physical Deflection Factor of the X Signal

Risetime Measurements Test Equipment 4-3 Main Sweep Timing Delayed Sweep Timing Main Sweep Magnifier Accuracy Delayed Sweep Magnifier Accuracy Relative Susceptibility to Static Discharge

Damage

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

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

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

......

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

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

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

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

......

....

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

1-1 1-6

1-6

2-13 2-16

4-13 4-14 4-15 4-15

5-2

JUN

1980

OPERATORS

7B53A

The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnlngs and cautions will be found throughout the manual where they apply, but may not appear in this summary.

IN THlS 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 in personal injury or loss of life

AS MARKED ON EQUIPMENT

CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking, or a hazard to property including the equipment itself.

DANGER indicates a personal injury hazard immediately accessible as one reads the marking.

SAFETY

SUMMARY

SYMBOLS

IN THlS MANUAL

Static-Sensitive Devices.

This symbol indicates where applicable cautionary or other information is to be found

AS MARKED ON EQUIPMENT

DANGER-H~gh voltage.

Protective ground (earth) terminal.

ATTENTION----refer to manual.

WARNINGS

POWER SOURCE

This product is intended to operate in a mainframe connected to a power source that will not apply more than rms between the supply conductors or between either supply conductor and ground. way of the

GROUNDING THE PRODUCT

'This product is grounded throirgh the grounding conductor of the mainframe power cord. To avoid electrical shock, plug

the

mainframe power cord into a properly w~red receptacle before connecting to the product input or output term~nals. A protective ground connection by way of the grounding conductor in the mainframe power cord is essential for safe operation.

ground~ng conductor in the mainframe power cord is essential for safe operation.

protective ground connection by

250

volts

REV

JAN

1985

DANGER ARISING FROM

7B53A

Upon loss of the protectwe-ground connection, all access~bie condijctrve parts (~ncludrng knobs and controls that may appear to be

rnsulat~ng), can render an electr~c shock

LOSS

GROUND

DO NOT OPERATE IN EXPLOSIVE ATMOSPHERES

To avoid explosion, do not operate this product in an atmosphere of explosive gases unless it has been specifically certified for such operation.

DO NOT OPERATE PLUG-IN UNIT

To avoid personal injury, do not operate this product without covers or panels installed.

unlt via a plug-in extender.

WITHOUT

COVERS

not apply power to the plug-~n

JUN

1980

SERVICING

7B53A

SAFETY

SUMMARY

FOR

QUALIFIED

SERVICE

PERSONNEL

ONLY

Refer also to the preceding Operators Safety Summary

DO NOT SERVICE ALONE

Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and

resuscitation is present.

USE CARE WHEN SERVICING WITH POWER ON

Dangerous voltages exist at several points in this product. To avoid personal injury, do not touch exposed connections

and components while power is on.

Disconnect power before

POWER SOURCE

This product is intended to operate in a mainframe connected to a power source that will not apply more than

rms between the supply conductors or between either supply conductor and ground.

way of the grounding conductor in the mainframe power cord is essential for safe operation.

removlng protective panels, soldering, or replacing components.

protective ground

250

connection

volts

JUN

1980

7B53A

The

7B53A

alphanumeric readout system provided for the 7000-series oscilloscopes.

and

7B53AN

are electrically identical except that only the

785314

Section 1-.--7B53A/7B53AN

is compatible with the

This instrument will meet the electrical characteristics listed under Performance Requirement in Table

The

complete calibration. except as otherwise indicated. Warmup time for given accuracy is 20 minutes.

-.--.

MAIN SWEEP

Sweep Rates 0.05 ys/div to 5 s/div in 25 calibrated

Sweep Accuracy

Over Center Eight Divisions

- - -

Variable Sweep Rates

Characteristics Performance Requirement Supplemental information

50 ms/div to 0.5 ysldiv

.-~

5 s/div to 0.1 s/div and

0.2

ys/div to 0.05 psldiv

Over any 2 div portion within center eight div (all sweep rates)

- - -

following electrical characteristics apply over an ambient temperature range of 0°C to +-50°C,

Table 1-1

-C35OC

[

:in

". .

3.5%

---

- - -

ELECTRICAL

O°C to +50°C

------"

w;;n

Within

T-".-'-."

1..

w!;i

Within

)variable to at least 2.5:l. VARIABLE

".'."

delayed sweep rates, and variable main sweep

holdoff.

-,--

r.-,.-.---.--.-.w-

..4.--"

-A=-"

steps. Measured in 7000-Series Oscilloscopes.

-115OC

Unmag Unmag Mag

--.m----....-..-."

w;itn

.".

Within W~th~n

---

With~n

- - -

Continuously variable between cali-

brated sweep rates. Extends sweep rate /control internally switchable between

to at least 12.5 s/div. variable main sweep rates, variable

1-1,

^-"

following

Sweep Hold-Off Hold-off time may be varied at least

2:l

by front-panel VARIABLE control

when Variable Selector connector

(P140) is connected for variable holdoff.

REV

JUN

1980

Table

7B53A

1-1

(cont)

DELAYED

Sweep Rates

Over Center

Variable Sweep Rate

Characteristics Performance Requirement Supplemental l nformation

SWEEP

ms/div to 0.5 psldiv

0.5 s/div to 0.1 sldiv and

Over any 2 div portion within center eight div (all sweep rates)

Divisions

-l.__."

-.,---

-l_-....l...lI

.l-ll___.

.05

ps/div to .5 s/div in 22 calibrated

easured in 7000-Series Oscilloscopes.

Continuously variable between calibrated sweep rates.

_l__-..--------"

"."

---.----,-.

-l_l._l_.l

division of the unmagnified sweep when

....

measuring

Extends sweep rate to at least

1.25

2.51. VARIABLE control switchable between variable main sweep rates, variable delayed sweep rates, and variable main sweep

-.--_

_-_

magnified

sldiv. Variable to at least

unmagnified

holdoff.

"--

MIXED

PIME

Mixed Sweep Accuracy

Variable Time Delay

SWEEP, VARIABLE

DELAY

. .- .

- - - - -

Main Sweep

Delayed Sweep

Delay Time Range

Differential Delay Time

Measurement Accuracy

(-+-15OC

Delay Time Jitter at

to +35'C)

5 s/div to 1 s/div

msfdiv

- -

Within

0 to 10 times DLY TIME/DIV

Within

the TlMVDlV setting.

plus main sweep error.

settings from 5 s/div to 1 ps/div.

Within 1.4% of measurement plus

0.3% of full scale.

0.7%

0.3% of full scale. Less than 1 part in 20,000 of 1 OX

...

of measurement plus

.....-..l._-.

_..__..._-,._l."__

Exclude the following portions of

the mixed sweep:

First 0.5 div after start of main sweep display and 0.2 div or 0.1 (whichever is greater) after transition of main to delayed sweep.

Full scale is 10 times the TlMWDlV

OR DLY TlMEsetting. Accuracy applies

over the center eight major DELAY TIME

MULT dial divisions.

. . .

.- . -.

----

1-2

REV

JUN

1980

7B53A

AMPLIFIER

Deflection Factor

EXT, MAG EXT, MAG Xl

EXT

Nominal Frequency Response

Characteristics Performance Requirement Supplemental Information

.. - .

.-i

10, MAG XI

AC AC

LF REJ

Xi0

"..

......-----A-

"".

"*.."

10 mV/div within 10%. 100

"~.

mVfdiv within 10%.

v/div within 10%.

System Oscilloscope.

.--3

Table

1-1

(cont)

~."

points in 7000-Series

...

.-..

.....

,.-"

"""

"."

-----

AC HF REJ 100 kHz

MAIN TRIGGERING

Trigger Sensitivity COUPLING

AC LF REJ 30 kHz to

~re~uentq Range

Triggering

10 MHz

150 kHz

10 MHz

Minimum Trigger

10 MHz

to 100 MHz

AC HF REJ 30 Hz

50 kHz

MHz

Signal Required

---

0.3

1.5

0.3 100

EXT

100

500

---

Triggering signal

~ncreased 10 times for

ments

EXT

10 ooeration.

amplitude

requtre-

REV

JAN

---

1385

dc to

10 MHz

---

10 MHz to

100 MHz

0 3

-"-

1.5

100

500

Table

7B53A

1-1

(cont)

---------".-

External Trigger Input

lnput

Maximum Safe Input Voltage

Level Range

Internal Trigger Jitter

DELAYED TRIGGERING

Trigger Sensitivity

Coupling

Characteristics Performance Requirement Supplemental Information

R and C

EXT

-,"---.----

-:-

10 At least + and 15 V.

--,.-,"

least + and - 1.5 V.

1 ns or less at 75 MHz.

Triggering

Frequency Range

30 Hz to

10 MHz

10 MHz to

100 MHz

---

--.

Minimum Trigger

Signal Required

- - -

Approximately 1 Mf2 paralleled by 20

pF.

500 V (dc to-peak ac at 1 kHz or less.

-1

Peak ac). 500 V peak-

."..

---.

----

. .

External 'Trigger lnput

Maximum Safe lnput Voltage SOURCE set to EXT)

Input R and C

Level Ranae

Internal Trigger Jitter

(DLY'D

TRIG

- - - - --

dc to

10 MHz

At least + and - 1.5 V.

1 ns or less at

--_---p-....."

MHz.

500 V (dc to-peak ac at 1 kHz or less.

11 Mf2 paralleled by 20 pF.

-1-

peak ac). 500 V peak-

l..lll...lll..-..-.----ll

---

REV A JUN

1980

OUTPUT

7B53A

Table

1-1

(cont)

Characteristics Performance Requirement Supplemental Information

SIGNALS

Delayed Sweep Gate

Maximum Safe Input Voltage

--.".-..-

Amplitude

Output Resistance

Polarity

Duration

DISPLAY MODE

INTEN, DLY'D SWP

----.-----.---.--

MIXED

..".-,"---".~-

-....""~~.v",~-~~~-

Rectangular pulse.

23.0

V with baseline at

--I

V when loaded by at least

20.475

--0.2

Positive-goi ng.

ll--l~_l_____----.---~-~-.~-"--~--

For the time that the delayed sweep runs.

-----.--.-

Composite gate signal with timing de-

termined by the setting of the

DIV OR DLY TIME switch during the main sweep portion of the display, and by the setting of the DLY'D Division switch during the delayed sweep portion of the display.

with baseline at 0 to

when loaded by

--,~-...-----.---"

---0.2

kfl.

----.-----

TIMV

lime/

rtlO

(dc i Peak ac).

to-peak ac at

Available at front-panel DLY'D TRIG IN connector when operating in the SWP, or MIXED Display Modes. The DLY'D must be set to be connected for Delayed Sweep Gate Out.

Approximately At least

or less.

-,--,."-----.....-....----

kHz

or less.

INTEN, DLY'D

TRIG SOURCE switch

IN-i and P613 must

350

---

kfl shunted

V peak-

----

100

Sweep Gate

Duration

DISPLAY MODE

MAIN SWEEP, INTEN DLY'D SWP

MIXED

l_l-~l-..l"

Main Sweep Gate

Duration

JUN

1980

----.-.-._lll.-..---

Refer to associated oscilloscope manual.

Coincident with the main sweep interval.

""-

Coincident with the main sweep interval.

-l.ll_,ll)....

Coincident with the main sweep interval plus the delayed sweep interval.

.--_____-lll.-.,l_-l

Refer to associated oscilloscope manual.

Coincident with the main sweep (all

Display Modes).

__III^.._,.l

^..

"..

".-

"--.

-.-----.l"....X-..-.

---

-----

---

Table

7B53A

1-1

(cont)

Sawtooth

Waveshape

Duration

For Internal Triggering only, the specified

when the number in the table is greater than the

Characteristics Performance Requirement Supplemental Information

-----

.-.....-~wp-.--"

"--

Refer to associated oscilloscope manual.

DISPLAY MODE

MAIN SWP, INTEN

DLY'D SWP

MIXED

I I

Sawtooth signal with slope determined by setting of the TIME switch.

Sawtooth signal with slope determined

by the setting of the DLY'D Division switch.

Composite sawtooth signal with slope determined by the setting of the TlMWDlV OR DLY TIME switch during the main sweep portion of display, and

by Division switch during the delayed

sweep portion of display.

Coincident with the time that each sweep is displayed.

TlMWDlV

the setting of the DLY'D Time/

--3

dB frequency of the vertical system replaces any frequencies in the above table

--3

dB frequency of the vertical system.

---.-

Time/

DLY

__.."l-___-_.l_l_._

Characteristics

Size

Weight

Table

1-2

ENVIRONMENTAL

Refer to the Specification for the associated oscilloscope.

Table

1-3

Ibs

(1.5

PHYSICAL

kg).

-.."

Fits all 7000-series plug-in compartments.

3.3

JUN

1980

Section

7B53A

2-7B53N7B53AN

OPERAT

7B53N7B53AN

The 7B53A and 7B53AN Dual Time Base units provide Main, Intensified, Delayed, and Mixed sweep operation for 'EKTRRONIX 7000-Series Oscilloscopes. Calibrated sweep rates from 5 magnification) and triggering to 100 MHz are provided.

7B53A and 7B53AN are electrically identical except

The that only the readout system provided for 7000-Series Oscilloscopes.

Other features include

delay,

variable main and delayed sweeprates, and variable

main sweep holdoff. Separate triggering controls are

provided for main and delayed sweep triggering, and

when operating in the AUTO MAIN TRIGGERING MODE,

a bright base line is displayed in the absence of a trigger signal. The amplifier for

Features

s/div to 50 ns/div

7B53A is compatible with the alphanumeric

0 to 10 times continuous sweep

7B53N7B53AN can also be used as an

X-Y

operation.

ns with XI0

INSTRUCTIONS

To install the ment, push it in until it fits firmly into the The front panel of the 7653N7653AN should beftush with the front panel of the indicator oscilloscope. Even though the gain of the indicator oscilloscope is standardized to minimize adjustment when inserting plug-in units, the sweep calibration of the ed when installed. The procedure for checking the unit is given under Sweep Calibration in procedure in this section.

To remove the (see ~i~, oscilloscope and pull it out of the plug-in compartment.

2-11

7B53N7B53AN in a plug-in compart-

compaitment.

7B53A17B53AN should becheck-

theoperating Checkout

7853N7B53AN, pull the release latch

to disengage the unit

from

the indicator

General

The 7B53A17B53AN operates with a TEKTHONIX 7000Series Oscilloscope and a 7A-Series Amplifier unit to form a complete oscilloscope system. To 7B53A/7B53AN, its operation and capabilities should be

known. 'This section explains the operation of the

panel controls and connectors, provides an Operating Checkout procedure, gives general operating information, and describes basic applications for this

effective1 y use the

front-

instrurnent.

Installation

The 7853A17853AN is designed to operate in the horizontal compartment of the indicator oscilloscope. Thisinstrument can also beinstalled compartment to provideasweepthat runsvertically on the crt. However, when used in this manner, there are no retrace blanking or internal triggering provisions, and the unit may not meet the specifications given in Section The instructions in this manual are written for use of the 7B53N7B53AN in the horizontal plug-in compartment,

Before proceeding with installation it is necessary to check the internal connections of the Variable Selector connector and the Delayed Sweep Gate Out connector. These connections should be checked against those

4-1

shown in Fig.

by qualified service personnel.

inthevertical plug-in

Fig.

2-1.

Location

release latch.

CONTROLS AND CONNECTORS

General

All controls required for the operation of the

7B53N?B53AN, except the Variable Selector and the

Dly'd Sweep Gate Out connector are located on the front panel of the instrument.

capabilities of this instrument, the operator should be familiar with the function and use of each control. A brief description of the front-panel controls and connectors is

given here. More detailed information is given under

'To make full use of the

REV 6 JUN

1980

Operating

7B53A

Instructions.---9853A17B53AN

General Operating Information. Fig.

2-2

shows the front

panel and external controls and connectors of the

B53A/7 B53AN.

Main Triggering Controls

LEVEL. Selects the amplitude point on the trigger

signal where sweep triggering occurs.

SLOPE. Two-position switch permits triggering on the positive-going or negative-going portion of the main triggering signal.

TRIG'D. Light indicates that the main sweep is triggered and will produce a display.

MODE. Pushbutton switches select the operating mode for the main triggering circuits.

COUPLING. Pushbutton switches select the method of coupling the triggering signal to the main triggering circuits.

SOURCE. Pushbutton switches select thesource of the main triggering signal.

2. Sweep

Controls

TIMEIDIV OR DLY TIME. Selects the sweep rate of the

main sweep generator (see Fig.

2-5).

DLY'D Time/Division. Selects the sweep rate of the

MAIN

delayed sweep generator and selects the INT'EN, and

DLY'D

SWP Display Modes (see Fig. 2-5).

SWP,

VARIABLE. Provides continuously variable main sweep rates, continuously variable delayed sweep rates,

Fig.

2-2.

Front-panel controls

and

connectors.

REV

JUN

1980

Operating

7B53A

Instructions-7B53A17B53AN

or variable main sweep holdoff; depending on the setting of the Variable Selector multi-pin connector VARIABLE control also selects the MIXED Display Mode (see Fig. 2-5).

SWP CAL. Screwdriver adjustment to match the gain of

7653A/7B53AN to the indicator oscilloscope for

the

calibrated sweep rates.

POSITION. Controls horizontal position of display.

FINE. Provides precise control of horizontal position

adjustment,

MAG. Pushbutton switch selects

magnification.

Delay Time Control

DELAY l IME MULT. Provides variable sweep delay

between 0.00 and 10.0 times the delay time indicated by

TIMUDIV OR DLY rlME switch.

the

Delayed Triggering Controls

XI or XI0 horizontal

(P140). The

OPERATING

CHECKOUT

Introduction

The following procedure checks the basic operation of

the

7B53A/7653AN. It may also be usedfor familiarization with this instrument or as an incoming inspection. This procedure is divided into two parts, Sweep Control Functions, and Main and Delayed Triggering Functions. A complete operating check of the functions can be made by performing both parts, or each part may be performed separately.

NOTE

For optimum performance, the should similar frequency and sweep rate capabilities.

instalied

an oscilfoscope system

7853N7853AN control

7853Ai7B53AN

with

Setup Procedure

Install the 7B53A/7B53AN in the right horizontal

compartment of the indicator oscilloscope.

Install a Vertical Amplifier unit in the left vertical

compartment.

LEVEL. Selects the RUNS AFTER DLY TIME or Triggerable After Dly Time Modes, and the amplitude point at which the delayed sweep is triggered.

SLOPE. Two-position switch permits triggering on the positivegoing or negative-going portion of the delayed

triggering signal.

COUPLING. Two-position switch selects the method of coupling the triggering signal to the delayed triggering circuits.

SOURCE. Two-position switch to select the source of the delayed triggering signal.

InputlOutput Connectors

MAlN TRIG IN OR AMP IN. Front-panel bnc connector serving as an external trigger input for the maintriggering circuit or as an external horizontal input, depending upon

the setting of the

MAlN TRIGGERING SOURCE switch.

TRlG IN. Front-panel bnc connector serving as

DLY'D an external trigger input forthedelayed triggering circuits or as a delayed sweep gate output; depending upon the DLY'D TRlG SOURCE switch, the position of the DISPLAY MODE.

TIMVDIV OR DLY TlMEswitch and the

P613, and

Turn on the indicator oscilioscopeand allow at least

20 minutes

4. MAlN TRIGGERING

DLY'D TRlG

Sweep Controls

5. Set the indicator oscilloscope to display the plug-in

units and adjust for

warmup.

Set the 7B53N7653AN controls as follows:

SLOPE MODE AUTO COUPLING AC

SOURCE INT

EVEL RUNS AFTER DLY

SLOPE COUPLING AC SOURCE

POSITION Midrange MAG TlMElDlV OR DLY FlME 1 ms DLY'D TrmefDivision VARIABLE CAL (fully clockwise) Variable Selector Main Variable DELAY[-IMEMULT 1.00

well defined display. See indicator

(-f

)

TIME (fully clockwise)

(f)

INT

X1-IN

REV

JUN

1980

2-3

Operating

7B53A

oscilloscope and vertical unit instruction manuals for detailed operating instructions.

Sweep

'The following procedure checks the operation of the

sweep controls and checks the Display Modes.

Normal Sweep

Instructions~--7B53A/7B53AN

Control

Perform steps 1 through 5 of the Setup Procedure.

Functions

Connect a 1 ms time-mark signal from the TimeMark Generator with a connectors and 50 associated vertical unit. Adjust the vertical switch for about four divisions of display and rotate the

MAIN TRIGGERING Check the crt display for one complete time-mark per division (position as necessary). If necessary, adjust the

SWP CAL screwdriver adjustment for one complete

mark per division over the center eight divisions of display. Disconnect the "Time-Mark Generator.

Z;1

bnc coaxial cable with bnc

bnc termination to the Input of the

VoltdDiv

1-EVEL controt for a stable display.

time

NOTE

The TimeIDivision switch selects main sweep rates, delayed sweep rates, and Display Modes (MAIN SWP, INTEN. DL Y'D Seiectrng Sweep Rates and Display Modes dis-

cussions further information.

To select the MAlN SWP Display Mode, press in the

Time/Division knob, and set the TIMVDIV OR DLY

DLY'D TIME switch and the DLY'D TimelDivision switch to the same sweep rate

Connect the 1 kHz calibrator signal from the in-

dicator oscilloscope to the vertical amplifier unit Input.

Adjust the Calibrator and thevertical for four divisions of display.

Rotatethe MAlN TRIGGERING LEVEL control for a stable MAIN DELAY TIME MULT dial and note that it has no effect on

the display.

the General Operating

SWP

SWP,

and MIXEL?). Refer lo

instructions

ms).

Volts/Division switch

display (non-delayed). Rotate the

for

Intensified, Delayed, and Mixed Sweep

Reconnect the osciIloscope Calibrator signal to the

vertical unit and adjust for about four divisions of vertical

display. Pull out the DLY'D

clockwise to

(TIMVDIV OR DLY TlME switch remains at 1 msldiv). Note that a delaying sweep with an intensified portion (delayed sweep) is displayed on the crt (the oscilloscope Intensity may need to be varied to view the intensified display).

Rotatethe DELAY'T'IMEMULTdial andnotethatthe amount of delay display is controlled by the DELAY TlME MULT dial.

Rotate the VARIABLE control counterclockwise out of switch detent and note that the sweep rate indicated by

TIME/DIV OR DLY TIME switch can be varied to at

the least the sweep rate

msl'divj. 'The internal Variable Selector connector must

set for variable main sweep rates. Return the

VARIABLE control to the GAL position.

.1 msi'div for the INTEN Display Mode

time before the intensified portion of

TimelDivision knob and rotate

of the next adjacent position

Rotate the POSITlON control and note that horizontally positions the trace, Rotate the FINE control and note that it provides precise horizontal positioning. position Disconnect the calibrator signal.

Sweep Calibration

NOTE

For accurate sweep timing, apply a signal of known frequency or time period (time-mark signal,

calibrator square wave, associated vertical amplifier unit and adjust the

TIMEIDIV OR DLY nME switch and the control to calibrate the signal graticule. Be sure that the sweep timing signa! is

0.5%.

accurate within tion procedure uses

Generator.

The following sweep caiibra-

TEKTRONIX

line etc.) to the

SWP

the oscilloscope

Time-Mark

CAF

10. Press the DLY'D

magnified display with sweep rate determined by the DLY'D may need to be increased to view the delayed sweep display.

11.

MIXED Display Mode (MIXED Display Mode can be selected when operating in the DLY'D SWP Display Mode only). Note that the main sweep is displayed at a rate

determined by the followed by a delayed sweep display at the rate determined by the DLY'D

DELAY TlME MULT dial display allocated to each sweep is determined by the

DELAY TlME

2-4

Time/Division switch to the inner

for DLY'D SWP

Time/Division switch. The oscilloscope Intensity

Pull out the VARIABLE "l"ime/Division knob for the

'TIMEIDIV OR DLY TlME switch

Time/Division switch. Rotate the

and note that the amount of

MULT

dial.

REV

JUN

the

1980

Main and Delayed Sweep Triggering Functions

7B53A

The following procedure checks the operation of the

main and delayed triggering controls:

Partial Procedure. To begin the Operating Checkout

with triggering, perform steps

Procedure provided at the beginning of the Operating Checkout. Connect the

indicator

osciIioscope to the vertical unit Input and adjust

for about four divisions of vertical display.

12.

Set the TIME/DIV OR DLY TlME switch and the DLY'D DLY'D

Time/Division switch to 1 ms and press in the

TimeiDivision switch and the Variable control. CHECK---that a stable display can be obtained with the COUPLING switch for MAlN

HF REJ, and DC for both the positive and negative

positions of the SLOPE switch (MAIN TRIGGERING

LEVEL control may be adjusted as necessary to obtain a stable main sweep display). Remove all connections from the oscilloscope system.

13.

Connect a 60

cable or voltage probe to the vertical unit Input and

50 adjust the

VoltsIDiv switch for about four divisions of

signal (iine voltage, etc.) with a

display. Set the MAlN TRIGGERING COUPLING switch to AC LF REJ and set the

ms. Rotate the MAIN TRIGGERING LEVEL control

"r^lMVDlV OR DLY TIME switch

throughout its range and check that a stable display cannot be obtained (TRIG'D light off).

14.

Change the MAlN 'TRIGGERING SOURCEswitch to LINE and the COUPLING switch to AC. Check that a stable main sweep display can be obtained with the MAIN TRIGGERING COUPLING switch set to AC, AC HF REJ, and DC (MAlN TRIGGERING LEVEL control may be adjusted as necessary). Remove all connections from the oscilloscope system.

15.

Connect the indicator oscilloscope Calibrator signal to the verticai unit Input connector and TRIG IN connector. Set the Calibrator for a 0.4 V, signal and adjust the vertical unit about four divisions of display. Set TIME switch and the DLY'D

Set the MAlN TRIGGERING SOURCE switch to EXT and

check that a stable display can be obtained with the

COUPLING switch for MAIN TRIGGERING set to AC, AC HF REJ, and DC, for both the positive and negative positions of the SLOPE switch (MAIN TRIGGERING LEVEL control may be adjusted as necessary for a stable

display).

16.

Change the MAlN TRIGGERING SOURCE switch

-:--

to EXT

kHz and adjust the vertical unit VoltsiDiv switch for

10. Set the oscilloscope Calibrator for 4 V at

through 5 of the Setup

kHz calibrator signal from the

'T'RIGGERING set to AC, AC

tothe MAIN

kHz

Volts/Div switch for

the'TIMWDIV OR DLY

TimelDivision switch to 1 ms.

about

Operating

divisions of display. Check that a stable display

Instructions--~7B53A/7B53AN

can be obtained with the COUPLING switch for MAIN TRIGGERING set to AC, AC HF REJ, and DC, for

boththe

positive and negative positions of the SLOPE switch

(MAIN TRIGGERING LEVEL control may be adjusted as necessary to obtain a stable delaying sweep display). Remove the Calibrator signal from the MAlN TRIG IN connector.

17.

Set the MAlN "TRIGGERING COUPLING switch to

AC and the SOURCE switch to

INT. Adjust the MAlN TRIGGERING LEVEL control for a stable display. Set the MODE switch to NORM and check for a stable display. Change the

MODEswitch to AUTO and adjust the LEVEL control for a free-running display. Change the MODE switch to NORM and check for no display.

18.

Adjust the MAlN TRIGGERING LEVEL control for a stable display. Change the MAlN TRIGGERING MODE switch to SINGLE SWP. Press the

check for one sweep. Remove the

RESET button and

kHz signal from the

vertical unit and press the RESET button. CHECK for no

display and that the READY light is on. Connect the

kHz

signal to the vertical unit and check for one sweep as the

signal is applied.

19.

Set the MAIN TRIGGERING MODE switch to

AUTO. With the pull out the DLY'D

ms (Intensified Display Mode). Rotate the MAlN

TIMWDIV OR DLY TIME switch

Time/Division switch and rotate to

ms,

TRIGGERING LEVEL control for a stable display (oscilloscope Intensity may need to be varied to view the intensified display). Rotate the

Df LAY TlME MULT dial

and note that the intensified portion of display is con-

tinuously variable.

20.

Rotate the DLY'D TRlG LEVEL control counterclockwise out of switch detent for a triggered delayed sweep. With the DLY'D SOURCE switches set to

TRIG SLOPE, COUPLING, and

(-f

AC, and INT; rotate the DLY'D TRIG LEVEL control for astable intensified portion of display. Rotate the DELAY

TIME MULT dial and note

that the intensified portion of display does not start at the

completion

of the

of the delay time (determined by the settings

TIMEIDIV OR DLY TIME switch and the DELAY

TIME MULT dial), but waits for the next trigger pulse.

21.

Press the DLY'D Time/Division switch in for the DLY'D SWP Display Mode. Rotate the DLY'DTWIG LEVEL control for a stable delayed sweep display (oscilfoscope Intensity may need to be varied). Check that a stable delayed sweep display can be obtained with the DLY'D TRIG COUPLING switch set to AC and

positions of the SLOPE switch (DLY'D TRIG LEVEL

DCfor both

.I-

and

control may be adjusted as necessary for a stable delayed sweep display).

REV

JUN

1980

2-5

Operating

7B53A

Instructions-.-7B53Ai1B53AN

22.

Change the DLY'D TRIG SOURCE switch to EXT.

Connect the indicator oscilloscope Calibrator signal to

the DLY'D

Calibrator for Volts/Division switch for about 4 divisions of display. Check that a stable delayed sweep display can be obtained with the DLY'D TRlG COUPLING switch set to AC and DC for both the

switch (DLY'D TRlG LEVEL control may be adjusted as

necessary for a stable delayed sweep display).

TRlG IN connector. Set the oscilloscope

0.4

V at 1 kHz

-t-

and adjust the vertical

and positions of the SLOPE

GENERAL OPERATING INSTRUCTIONS

Pushbutton Switch Logic

The MODE, COUPLING, and SOURCE pushbuttons of

the MAlN TRIGGERING switches are arranged in

sequence that places the most-often used position at the

top of each series of pushbuttons. With this arrangement,

a stable display can usually be obtained by pressing the top pushbuttons: AUTO, AC, and INT. When an adequate trigger signal is applied, the unit is triggered as indicated

by the illuminated

of the LEVEL control and SLOPE switch. If the

light is not on, the LEVEL control isat asetting outsidethe

range of the trigger signal applied to this unit from the

vertical unit, the trigger signal is inadequate, or its frequency is below the lower frequency limit of the AC

COUPLING switch position. If the desired display is not

obtained with these buttons pushed in, other selections

must be made. Refer to the following discussions or the

intruction manuals for the associated oscilloscope and

vertical unit for more information.

Triggered Light

'IRIG'D light, with the correct settings

TRIG'D

switch are correctly set. The TRIG'D light indicates when the display is triggered.

When the trigger repetition rate is below about outside the frequency range selected by the COUPLING switch, or when thetrigger signal is inadequate,

free-runs at the sweep rate indicated by the -TIMVDlV OR

DLY TIME switch (TRIG'D light off). When an adequate

trigger signal is again applied,

ends and a triggered display is presented. The sweep also

free-runs when the LEVEL control is at a setting outside the amplitude range of the trigger signal.

running display can be useful when it is desired to measure only the maximum peak-to-peak amplitude of a signal without observing the waveshape (such as in bandwidth measurements). When the display is of amuch

greater amplitude than can be displayed on the crt, the sweep will be triggered in all positions of the LEVEL control and will not free-run.

NORM.

triggered display is presented with the correct setting of the LEVEL control and SLOPE switch whenever an adequate trigger signal is applied. indicates when the display is triggered.

The NORM trigger mode must be used to produce triggered displays with trigger repetition rates below about outside the amplitude range of thetrigger signal, trigger repetition rate is outside the frequency range selected by the COUPLING switch, or when the trigger signal is inadequate,

When the NORM pushbutton is pressed, a

Hz.

When the LEVEL control is at a setting

thereis no trace (TRIG'D light isoff).

the free-running

Thistype of free-

"The TRIG'D light

Hz,

thesweep

condition

whenthe

The TRIG'D light conveniently indicates the condition of the triggering circuits. If the MAlN TRIGGERING controls are correctly set and an adequate trigger signal is applied, the TRIG'D light is on. Under certain conditions,

the TRIG'D light may be off, indicating that the sweep is

not triggered. The cause could be a misadjusted LEVEL control, incorrectly set COUPLING or SOURCE switches,

low trigger signal amplitude, or a triggering signal repetition rate outside the acceptable frequency range. This light can be used as a general indication of correct triggering. It is particularly useful when setting up the trigger circuits when a triggering signal is available without a display on the crt.

Main Trigger Mode

The pushbuttons located under the MODE title select

the mode in which the main sweep is triggered.

AUTO.

triggered display is presented whenever an adequate trigger signal is applied and the

When the AU'TO pushbutton is pressed, a

LEVELcontrol and SLOPE

2-6

SINGLE

be displayed is not repetitve or varies in amplitude, waveshape, or repetition rate, a conventional repetitive type display may produce an unstable presentation. A stable display can often be obtained under these circumstances by using the SINGLE The SINGLE SWP MODE is also useful non-repetitive or unstable displays.

To obtain a single-sweep display of a repetitive signal,

first obtain the best possible display in the NORM MODE.

Then without changing the other MAlN TRIGGERING switches, press the SINGLE SWEEP pushbutton. When ready to view thesingle-sweep display, press the

READY pushbutton. A single trace is presented each time

the RESET-READY pushbutton is pressed

repetitive signal remains connected to the system and MAlN TRIGGERING switches are correctly set); further sweeps cannot be presented until the RESET-READY pushbutton is pressed again. If the display signal is a complex waveform composed of varying amplitude, successive single-sweep displays may not start at the

SWEEP,

RESET-READY.

SWPfeature of this unit.

When the signal to

photograph

RESET-

(as long as the

REV

JUN

1980

7B53A

Operating

7B53A

Instructions---7B53A/7B53AN

REJ.

In the AC LF REJ position of the

COUPLING switch, dc is rejected and low-frequency

kHz

trigger signals below about 30

Therefore, the sweep is triggered only by the

are attenuated.

higher-

frequency components of the trigger signal. This position

is particularly useful for providing stable triggering if the trigger signal contains line-frequency components. Also, the AC LF REJ position provides the best alternate vertical

displays at fast sweep rates when comparing two or more

unrelated signals.

REJ.

The AC

REJ position of theCOUPLlNG

switch passes all low-frequency signals between about

and 50 kHz. Dc is rejected and signals outside the

above rage are attenuated. When triggeringfrom complex

waveforms, this position is useful to provide a stable

display of the low-frequency components.

DC.

The DC position of the COUPLING switch can be used to provide stable triggering with low-frequency signals which would be attenuated in the other modes, or with low-repetition rate signals. It can also be used to trigger the sweep when the trigger signal reaches a dc level selected by the setting of the LEVEL control. When using internal triggering, the setting of the vertical unit position control affects the dc triggering point.

Main Triggering Source

'TheMAIN TRIGGERING pushbutton located belowthe SOURCEtitle select the source of the trigger signal which is connected to the main triggering circuits.

INT.

In the IN% position of the SOURCE switch, the

trigger signal is derived from the associated vertical unit.

Further selection of the internal trigger signal may be provided by the associated vertical unit or indicator

oscilloscope; see the instruction manuals for these instruments for information. For most applications, the

position of the SOURCE switch can be used. However,

some applications requirespecial triggering which cannot

be obtained in the

such cases the

INT position of the SOURCEswitch. In

LlNE or EXT positions of the SOURCE

switch must be used.

INT

be time-related to the displayed waveform for a stable display. An external trigger signal can provide a triggered display when the internal signal is too

low in amplitude for correct triggering, or contains signal components on which it is not desired to trigger. It is also useful when signal tracing in amplifiers, phase shift networks, waveshaping circuits, etc. the circuit undertest can beconnected

Thesignal from a single point in

tothe EXTqI"'RIG IN connector with a probe or cable. The sweep is then triggered by the same signal at all times and allows amplitude, time relationship, or waveshape changes of signals at various points in the circuit to be examined without resetting the MAIN TRIGGERING controls.

-i-

10.

EXT

Operation in the EXT t 10 position of the

SOURCE switch is the same as described for EXT except

that the external signal is attenuated

lotimes. Attenuation of high-amplitude external trigger signals is desirable to broaden the range of the LEVEL control.

Trigger Slope

The MAIN TRIGGERING SLOPE switch (concentric with the MAIN TRIGGERING LEVEL control) determines whether the trigger circuit responds on the positive-going or negative-going portion of the trigger signal. When the SLOPE switch is in the

-I-

position, the display startsonthe

positive-going portion of the waveform; in the position,

the display starts with the negative-going portion of the

2-4).

waveform (see Fig.

When several cycles of a signal appear in a display, the setting of the SLOPE switch is often unimportant. However, if only a certain portion of a cycle is to be displayed, correct setting of the SLOPE switch is important to provideadisplay which starts on the desired slope of the input signal.

Trigger Level

"The MAlN TRIGGER LEVEL control determines the

voltage level on the trigger signal at which the sweep is

triggered. When the LEVEL control is set in the the trigger circuit responds at a more positive point on the

trigger signal. When the LEVEL. control is set in the

region, the trigger circuit responds at a more negative

2-4

point on the trigger signal. Fig.

illustrates this effect

with different settings of the SLOPE switch.

region,

LINE.

The LlNE ~osition of the SOURCE switch connects a sample of the power-line voltage from the indicator oscilloscope to the trigger circuit. Line

trigger-

ing is useful whentheinput signal istime-related (multiple

or submultiple) to the line frequency. It is also useful for providing a stable display of a line-frequency component

in a complex waveform.

EX$.

An external signal connected to the MAIN TRIG The TIME/DIV OR DLY TIME switch selects calibrated IN connector can be used to trigger the sweep in the EXT position of the SOURCE switch.

The external signal must

2-8

Before setting the MAIN TRIGGERING LEVEL, set the

desired

the

clockwise

SLOPE,

LEVEL

MODE, COUPLING,

control

until

the

fully

display

and

counterclockwise

starts

the

desired

SOURCE,

and then

point,

Set

rotate

Selecting Sweep Rates

sweep rates for the main sweep generator and the DLY'D

I'imeiDivision switch selects calibrated sweep rates for

REV A JUN

1980

(LEVEL)

7B53A

Operating

Instructions--7B53A/7B53AN

CRT DISPLAY

OBTAINED SLOPE SWITCH SET

WITH

POSITIVE(+)

REV

car

DISPLAY

OBTAINED SLOPE SWITCH SET

JUN

W1TH

TO NEGATIVE

1980

(-)

Fig.

2-4.

Effect of LEVEL control and SLOPE

switch

on CRT display.

Operating

7B53A

Instructions--7BS3A/7B53AN

the delayed sweep generator. The sweep rate of the main

sweep generator is bracketed by the black lines on the clear plastic flange of the TIMVDIV OR DLY TIME switch (see Fig. 2-5). The sweep rate of the delayed sweep generator is indicated by the white line on the DLY'D Time/Division knob. When the T'IMVDIV OR DLY TlME switch and the DLY'D Time/Division switch are set to the same sweep rate, the switches lock together and the sweep rate of both generators are changed at the same

time. However, when the DLY'D

pulled outward, the clear plastic flange is disengaged and

the

all0ws changing changing generator. The DLY'D Time/Division switch also seiects

section for further information.

A VARIABLE control is provided concentric with the

T'IMVDIV OR DLY

switches (see Fig. 2-5). When the VARIABLE control is

rotated clockwise to the CAL position (into switch detent)

the variable function is inoperative and the VARIABLE

knob can be used only to select the MIXED Display Mode (see Display Mode discussion in this section for more information). However, when rotated counterclockwise (out of switch detent), the VARIABLE control is activated

the

Modes.

sweep generator sweep

the

time

determined

See

TlME and the DLY'D Time/Division

Time/Division knob is

rate

changed'

sweep

Mode

rate

the

main

discussion

without

sweep

this

for variable (uncalibrated) sweep rates, or main sweep setting of the Variable Selector multi-pin connector. The

VARIABLE control allows the sweep rate in each Time/Division switch position (main or delayed) to be reduced to at least the next adjacent switch position and

holdoff time to be increased

the

main sweep rates, delayed

holdoff; depending upon the

2:l.

"Time Measurement

When making time measurements from the graticule,

the center eight divisions provide the most linear time

measurements (see Fig, 2-6).

timing

TIMUD,,, area falls between the second and tenth vertical lines,

area

to the second vertical line and adjust the

DLY

Position the start

switch

the

end

the

timing

Sweep Magnifier

The sweep magnifier can be used to expand the display ten times. The center division of the unmagnified display is the portionvisibleon thecrt in themagnifiedform (see Fig.

2-7).

Equivalent length of the magnified sweep is more

100

than

by adjusting the POSITION control to bring the desired portion onto the viewing area.

divisions; any

division portion can be viewed

Fig.

2-5.

Composite Time/Division switch.

REV 6 JUN

1980

Operating

7B53A

Instructions---7B53A/7B53AN

Fig.

2-6.

Area of graticule used for accurate time measurements.

OUT position, the equivalent magnified sweep rate can be determined by dividing the

Forexample,

in the delayed sweep rate as well as the main sweep rate is increased 10 times.

Display

settings of the

DisIJlav Mode (non-delayed sweep) set the TIMVDIV OR

DLY

sweep rate and press in the DLY'D Calibrated sweep rates in the MAIN SWP Display Mode are available from 5 magnification). The VARIABLE control (Variable Selector connector set to Main Variable) can be used to obtain uncalibrated sweep rates to 12.5 MAlN SWP Display Mode is controlled by the MAlN TRIGGER controls.

XI0 position. When the MAG switch is in the XI0

Time/Division setting by 10.

iftheTlMVDlVOR DLY TlMEswitch issetto

ms the equivalent sweep rate is 100 ps. When operating

INTEN, DLY'D SWP, or MIXED Display Modes the

Modes

Four Display Modes can be selected by appropriate

Time/Division switches (see Fig. 2-5).

Main Sweep Operation.

TIME

~~~'DLYD

~ime/~ivisibk switches to the same

s/div to 0.05 ps/div (5 ns/div with X10

To select the MAlN SWP

Time/Division switch.

sldiv. Triggering in the

Fig.

2-7.

Operation of Sweep Magnifier.

TO use the MAG switch, first move the portion of the display which is to be expanded to the center of the graticule. Then press and release the MAG switch to the

Intensified SweepDisplay.

Mode, pull out the DLY'D to a desired sweep rate faster than the TIMVDIV OR DLY TIME switch setting. The INTEN Display Mode provides an intensified portion of the main sweep during the time the delayed sweep is in operation (see Fig. 2-8A). The time that the delayed sweep runs is determined by the DLY'D Time/Division switch. The amount of delay time between the start of the delaying sweep and the intensified portion is determined by the the DELAY sweep portion of display is controlled by the MAlN "TRIGGERING controls; triggering for the intensified portion of display is controlled by the DLY'D TRIG controls.

Delayed Sweep Display.

is selected when the DLY'D out, rotated in the and then pushed in, In this mode, the intensified portion of display, as viewed in the played on the crt at the sweep rate indicated by the DLY'D Time/Division switch (see Fig. 2-88}. Calibrated sweep rates in the DLY'D SWP Display Mode are available from .5 s/div to 0.05 psldiv. Uncalibrated delayed sweep rates to 1.25 control (Variable Selector connector set to Dly'd Variable position). Triggering for the DLY'D SWP display is controlled by

TIME MULT dial, Triggering for the delaying

s/div can be obtained by using the VARIABLE

the DLY'D TRIG controls.

TiMEIDIV OR DLY 'TIMEswitch and

INTEN Modeforthedesiredsweeprate,

To select the INTEN Display

Time/Division knob and rotateit

The DLY'D SWP Display Mode

Time/Division switch is pulled

INTEN Display Mode, is dis-

REV

JUN

1980

2-1

Operating

7B53A

Instructions--78fi3Al7B53AN

Fig.

set to

2-9.

Typical Mixed Sweep display (DELAY TIME MULT dial

3.55)

Rg.

2-8.

display.

(A) Intensified Sweep display;

Mixed Sweep Operation.

The MIXED Display Mode is

(B)

Delayed Sweep

selected when the DLY'D SWP Display Mode is selected

and the VARIABLE knob is pulled out. In this mode, the main sweep is displayed on the crt to a point determined by the DELAY 'TIME MULT dial; the remainder of the sweep is at a rate determined by the delayed sweep. Triggering for the main sweep portion of display is controlled by the MAIN TRIGGERING controls; and

triggering for the delayed sweep portion of display is

TRlG

controlled by the DLY'D

controls. A typical mixed

sweep display is shown in Fig. 2-9.

Delay Time Multiplier

'The DELAY TIME MULT dial (functional in the INTEN,

DLY'D SWP, and MIXED Display Modes) provides Oto 10

times continuous sweep delay. The time that the main

sweep runs before the start of the delayed sweep is determined by the settings of the switch and the DELAY TlME MULT dial.

For example, the delay time indicated by the DELAY

"TIME MULT dial in Fig.

3.55

crt divisions of main sweep. Thus 3.55 multiplied by

2-10

TlMVDlVOR DLY TIME

is 3.55; this corresponds to

Fig.

2-10.

DELAY TlME MULT dial. Reading shown: 3.55.

the delaying sweep rate, indicated by the 'TIMVDIV OR

DLY TlME switch, gives the calibrated delay time before

the start of the delayed sweep.

Delayed Sweep Triggering

A LEVEL control and SLOPE, COUPLING, and SOURCE switches are provided for delay sweep triggering. When the LEVEL control is rotated to the RUNS AFTER DLY TIME position the delayed sweep starts immediately after the delay time. The DLY'D control and the SLOPE, COUPLING, and SOURCE switches are inoperative. This mode permits the selection of continuously variable delay times (by varying the DELAY TlME MULT dial).

TRlG LEVEL

2-12

REV C JUN

1980

Operating

7B53A

Instructions--7B53A/7B53AN

When the DLY'D TRlG LEVEL control is rotated counterclockwise (out of switch detent), the delayed sweep is triggerable. The delayed sweep does not start at

completion of the delay time but, waits until a trigger

the pulse is received by the delayed sweep triggering circuit.

I'he delay time in this mode is dependent not only on the settings of the delay-time controls, but on the delayed sweep triggering controls and the occurrence of the delayed sweep triggering signal. 'The primary purpose of this mode is to eliminate jitter from the display delayed sweep waveform. Since the delayed sweep is triggered by the input waveform, jitter is eliminated from the delayed sweep display even though it may be inherent in the input waveform.

When the delayed sweep is triggerable, the LEVEL

control can be rotated to select the amplitude point on the

trigger signal at which the delayed sweep is triggered. The

DLY'D PRIG SLOPE, COUPLING, and SOURCE switches are activated and their functions are the same for delayed triggering as functions with the same title are for MAIN 'TRIGGERING (see Main Triggering Level, Slope, Coupling, and Source discussions in this section).

InputIOutput Connectors

Two dual-function bnc connectors are provided on the

instrument front-panel.

MAlN TRIG IN OR AMP IN.

external trigger input for the main triggering circuit when the MAIN TRIGGERING SOURCE switch is set to EXT or

10 and the TIMVDIV OR DLY IIMEswitch is set to

EXT any position except AMPL. When the TIME switch is set to AMPL and the MAlN TRIGGERING SOURCE switch is set to EXTor EXT serves as an external horizontal input (see X-Y Operation).

'This connector is an

TlMWDlV OR DLY

1.-

10,

this connector

To apply an external signal (X-signal) to the horizontal

system, set the

7B53A/7B53AN TIM WDIV OR DLY TIME

switch to AMPL and the MAlN TRIGGERING SOURCE

EXT.

switch to

The MAlN TRIGGERING COUPLING selected affects the frequency response of the X-signal. Apply the external signal to the MAIN TRIG IN OR AMP IN connector. Deflection factor of the X-signal is provided in

2-1.

multiples of 10 as shown in Table

The Y-signal can be applied to the plug-in unit installed in the vertical compartment.

Table

2-7

DEFLECTION FACTOR OF

THE

SIGNAL

Main Deflection

Triggering

-,.-"--"

.------- "-

EXT 10 mV/div

EX7 700 mV/div

". .-

EXT + 10

.--.-.-.-

----."

.-------.-.

--,-

---.

Vldiv

-.----.--

"-----

'To apply the X-signal internally via the triggering

system set the

S'IME/DIV OR DLY TlME switch to AMPL and the MAlN TRIGGERING SOURCE switch to INT. Apply the external signal to the Amplifier unit installed in the vertical compartment. "The attenuator switch of the Amplifier unit determines the horizontal deflection factor.

For information on X-Y applications see the oscilloscope manual. Also, the reference books listed under Applications provide information on X-Y measurements and interpreting the resultant

lissajous displays.

Mainframe Operating Modes

DLY'D TRIG IN.

This connector is an external input for

the delayed triggering circuit when the DLY'D TRlG

EXT.

SOURCE switch is set to

When the DLY'D T'RIG SOUHCE switch is set to INT and P613 is properly connected,

the DLY'D TRlG IN connector serves as a Delayed Sweep Gate Out connector (not labeled). The Delayed Sweep Gatesignal is arectangular positive-going pulse with approximately 3.0 V amplitude and pulse width coincident with the delayed sweep.

X-Y

Operation

Some applications required one signal displayed versus another rather than against time (internal sweep). The amplifier function of the

7B53A/7B53AN allows an external signal to be appliedtothe horizontal deflection system either externally via the MAIN TRlG IN OR AMP IN connector or internally by way of the triggering system.

REV

JUN

1980

The 7B53A17B53AN can be operated in a 7000-Series OsciIIsocope which has four plug-in compartments, either independently, in the Alternate or Chopped Horizontal Modes, or as a delayed sweep unit. However, when the 7B53N7B53AN is operated as a delayed sweep unit, it must be triggered for a crt display.

It cannot delay another time base unit but it can delay its own internal delayed sweep. Refer to the appropriate oscilloscope manual for additional mainframe horizontal operating information.

General

The following information describes the procedureand

techniques for making basic measurements with a

7B53N7B53AN installed in a 7000-Series Oscilloscope.

These applications are not described in detail, since each

application must be adapted to the requirements of the

2-13

Operating

7B53A

Instructions--7B53A/7B53AN

individual measurement. This instrument can also be used

for many applications not described in this manual.

Contact your local Tektronix

Fieldofficeor representative for assistance in making specific measurements. The following books describe oscilloscope measurement techniques which can be adapted for use with this

instrument. horizontal

4. Divide the period of the reference signal (seconds)

by the product of the horizontal deflection established in

(division) and the setting of the TIMWDIV OR DLY

step TIME switch. This is the horizontal conversion factor:

Horizontal

Conversion

Factor

reference signal period (seconds)

deflection

TIM WDlV OR

DLY TlME

(divisions) switch setting

J. Czech, "Oscilloscope Measuring Techniques",

Phillips Technical Library, Springer-Verlag, New York,

1965. 5. To measure the period of an unknown signal disconnect the reference signal and connect the unknown

signal tothevertical unit. Set the TIMWDIVOR

DLY'TIME

switch to a setting that provides sufficient horizontal

John

Lenkl

andbo book

and Applications", Prentice-Hall, Inc. Englewood

of Oscillosco~e

deflection to make an accurate measurement. Do not

the

VARIABLE

control,

Cliffs, N.J., 1968.

6. Measure the horizontal deflection in divisions and

Charles

Roth, Jr., "Use of the Oscilloscope", Programmed Text, Prentice-Hall, Inc., Englewood cliffs, N.J., 1970.

J.H. Golding, "Measuring Oscilloscope", Tran-

satlantic, 1971.

calculate the period of the unknown signal using the following formual:

Period

(Seconds)

7-IMVDIV OR horizontal horizontal

DLY TIME

setting

conversion

factor (divisions)

deflection

Comparison Measurement Techniques

Sweep Rates. To establish an arbitrary horizontal

Example. Assume a reference signal frequency of

455 Hz(period2.19 setting of

ms),aTIMVDlVORDLYTIMEswitch

ms, and the VARIABLE control adjusted to

sweep rate based upon a specific reference frequency provide a horizontal deflection of eight divisions. proceed as follows:

1. Connect the reference signal to the input of the

vertical unit. Set the

Volts/Division switch of the vertical

unit for four or fivedivisions of vertical deflection. Obtain a

Substituting these values in the horizontal conversion

factor formula (step 4):

Horizontal

Conversion

Factor

triggered display.

Set the

TIME/DIV OR DL'Y TlME switch and the VARIABLE control (Variable Selector connector set to Main Variable) so one cycle of the signal covers an exact

number of horizontal divisions. Do not change the

VARIABLE control after obtaining the desired deflection.

Then, with a

ps, the period of an unknown signal which completes

50 one cycle in seven horizontal divisions can be determined by using the period formual (step

Period

(Seconds)

TIME/DIV OR DLY TIMEswitch setting of

6):

=5Ops X 1.37 X 7= 48Ops

This display can be used as a reference for frequency comparison measurements.

Phis answer can be converted to frequency by taking

the reciprocal of the period in seconds (see application on

3. To establish an arbitrary sweep rate so the period

Determining Frequency Measurements).

(time for one complete cycle) of an unknown signal can be measured accurately at any setting of the DLY TlME switch, the period of the reference signal must be known. If it is not known, it can be measured beforethe VARIABLE switch is set in step 2.

TIM WDlV OR

Time

Duration Measurements

Po measure time between two points on a waveform,

use the following procedure:

2-14

REV

JUN

1980

Operating

7B53A

Instructions--7B53A17B53AN

1. Connect thesignal to be displayedtotheinput of the

vertical unit.

Determining Frequency

The time measurement technique can also be used to

determine the frequency of a signal. The frequency of a

set

the

Vertical

and

~~~~~~~~~l ~~d~

the indicator oscilloscope to display the plug-in units

periodically recurrent signal is the reciprocal of the time

duration

(period)

Of One

used.

Use the following procedure:

Set the Volts/Division switch of the vertical unit to

display about four divisions of waveform.

Set the MAIN TRIGGERING controls to obtain a

1. Measure the time duration of one complete cycle of

the waveform as described in the previous application.

'Take the reciprocal of the time duration to deter-

stable display. mine the frequency.

Setthe TIMVDIVOR DLY TIMEswitchtothefastest

sweep rate that displays less than eight divisions between

Example. The frequency of the signal shown in Fig. 2-

11 which has a time period of 0.5 ms is:

the time measurement points (see topic entitled "Time

Measurements" and Fig. 2-6).

Adjust the vertical unit position control to move the

points between which the time measurement is made to

Frequency

-.-----"*--

time period 0.5 ms

--=

the center horizontal line.

cycle-

--*-.-

kHz

Adjust the horizontal POSITION control to position

the time-measurement points within the center eight

divisions of the graticule.

Measure the horizontal distance between the time

measurement points. Be sure the VARIABLE control is set

to CAL.

9. Multiply the distance measured in step

setting of the

TIME/DIV OR DLY TlME switch.

by the

Example. Assume that the distance between the time

measurement points is five divisions (see Fig. 2-11), and

"TIMVDIV OR DLY TIME switch is set to

the

ms.

Using the formula:

horizontal TlME/DIV OR

Time Duration

distance

DLY TIME

(divisions) setting

Substituting the given values:

'Time Duration

The time duration

0.5 ms.

0.1 ms

Fig.

2-11.

waveform.

[s+~Horizontal

Measuring the

distance

time

duration between points

I I

Risetime Measurements

Fiisetime measurements empfoy basically techniques as time-duration measurements. The main difference made. measuring waveform.

isthe points between which the measurement is

The following procedure gives the basic method of

risetime between the 10% and 90% pointsof the Falltime can be measured in the same manner

on the trailing edge of the waveform.

the

same

REV

JUN

1980

Operating

7B53A

Instructions-7B53Af7B53AN

1. Connect thesignal to bedisplayedtotheinput of the

vertical unit.

2. Set the Vertical and Horizontal Mode switches on

the indicator oscilloscopeto displaythe plug-in unit used.

Set the Volts/Division switch and the Variable VoltslDivision control of the vertical unit to produce a signal an exact number of divisions in amplitude.

Center the display about the center horizontal graticule line with the vertical unit Position control.

5. Set the MAIN TRIGGERING controls to obtain a

stable display.

6. Set the TIMEIDIVOR DLY TlMEswitchtothefastest

sweep rate that displays less than eight divisions between

10°/o and 90% points on the waveform.

the

Determine the 10% and 90% points on the rising portion of the waveform. Thefiguresgiven in for the points 10% up from the start and 10% down from the top of the rising portion (90% point).

Table2-2are

the rising portion

10, Multiply the distance measured in step 9 by the

setting of the

Example.

the

10%and 90% points is four divisions (see Fig. 2-12) and TIMWDIV OR DLYTlMEswitch issetto 1 ps. Applying

the the time duration formula to risetime:

Time horizontal

Duration

(Risetime) (divisions) setting

Substitute the given values:

Risetime = 4 X 1 ps.

7"he risetime is 4.0

TIME/DIV OR DLY TIME switch.

Assume that the horizontal distance between

TlMWDlV OR

distance

,us.

DLY TiME

Table

2-2

RlSEf lME MEASUREMENTS

10°/~ and 90%

----

0.4 and 3.6 divisions

0.5 and 4.5 divisions

0.6 and 5.4 divisions

Adjust the horizontal POSITION control to move the

10% point of the waveform tothe second vertical line of the graticule. For example, with a five-division display as shown in Fig. 2-12, the start of the rising portion.

9. Measure the horizontal distance between the 10% 90% points. Be sure the VARIABLE control is set to

and CAL.

10% point is0.5division upfrom the

-".-".--

10% and

9O0/0

!+*Horizontal

distance

Fig.

2-12.

Measuring risetime.

Delayed Sweep Measurement

The delayed sweep mode can be used to make accurate

time measurements. The following measurement deter-

mines the time difference between two pulses displayed on the same trace. This application may also be used to measure time difference from two different sources

trace) or to measure time duration of a single pulse. See

Section 2 for measurement accuracy.

1. Connect thesignal to be displayed

vertical unit.

2. Set the vertical and horizontal Mode switches on the

indicator oscilloscope to display the plug-in units used.

tothe input of the

(dual-

2-16

REV

JUN

1980

Operating

7B53A

lnstructions--7653A/7BS3AN

3. Set the Volts/Division switch of the vertical unit to

produce a display about

Adjust the MAIN TRIGGERING controls for a stable

display.

If possible, set the TlMVDlV OR DLY TlME switch to a sweep rate which displays about eight divisions between pulses.

Set the DLY'D Time/Division switch to a setting

1/100 of the TIMVDIV OR DLY TIME switch setting and

pull out the DLY'D

Display Mode. This produces an intensified portion ap-

proximately

Measurement accuracy will control setting for MAIN TRlGG ERlNG or horizontal POSITION control setting is changed.

intensified portion of the trace to the first pulse.

0.1 division in length.

Rotate the DELAY TlME MULT dial to move the

Time/Division switch for the INTEN

divisions in amplitude.

NOTE

affected if the

LEVEL

DELAY-TIME

MULT

1.31

dial:

DELAY-TIME

MULT

dial:

8.81

8. Press in the DLY'D 'Time/Division switch for the

DLY'D SWP Display Mode.

Adjust the DELAY TIME MULT dial to move the pulse (or the rising portion) to the center vertical graticule line. Note the exact setting of the dials.

Fig.

2-13.

Measuring

10. Turn the DELAY TlME MULT dial clockwise until

thesecond

pulse. (If several pulses are displayed, return DISPLAY MODE to locate the correct pulse.) Again note

the exact dial setting.

11. Subtract the first dial setting from the second and dial dial multiply bythedelay timeshown by TlME switch. This figure is the time interval between pulses.

Example.

second dial setting 8.81 with the TIMVDIV OR DLY TIME

switch set to

pulseis positionedtothesame point asthefirst

tothe IN'TEN

theTIMVDlVOR DLY setting setting DLY TIME switch setting)

Assume the first dial setting is 1.31 and the

ms (see Fig. 2-13).

Time Difference

(Delayed Sweep)

second first

Substituting the given values:

"Time Difference The time difference is 15

time

difference using delayed sweep.

delay time (TIMVDIV OR

(8.81 - 1.31) X 2 gs

MS.

JUN

1980

Operating

7B53A

Instructions--7B53A/7B53AN

Delayed

The delayed sweep feature of the 7B53N7B53AN provides apparent magnification of the displayed waveform. The sweep rate of the delayed sweep is not actually increased; the apparent magnification is the result of delaying the Delayed Sweep an amount of time selected by the

DELAY TlME MULT dial before the display is presented at the sweep rate selected by the DLY'D switch. The following method uses the RUNSAFTER DLY TIME DLY'D the display to be positioned with the DELAY TlME MULT dial. If thereistoo much jitter in the delayedsweep display, use the Triggered delay sweep magnification procedure which follows this procedure.

connector of the vertical unit. Set the Vertical and Horizontal Mode switches on the indicator oscilloscope to display the plug-in units used.

2. Set the

produce a display about 4 divisions in amplitude.

Sweep

Connect the signal to be displayed to the input

Magnification

TlMUDlV OR DLY TIME switch and the

Time/Division

TRlG Mode to allow the delayed portion of

Volts/Division switch of the vertical unit to

Pulse

magnified

Adjust the MAIN TRIGGERING controlsfor astable

display.

4. Set the

ratewhich displays thecomplete waveform (see Fig. 2-14).

Pull out the DLY'D Time/Division switch for the INTEN Display Mode. Rotate the DLY'D TRlG LEVEL control clockwise to RUNS AFTER DLY TIME.

Position the start of the intensified portion with the DELAY TIME MULT magnified.

Set the DLY'D Pime/Division switch to a setting which intensifies the full portion of the display to be ma,gnified. 'The start of the intensified trace will remain as positioned in step

Press in the DLY'D 'TimelDivision switch for the

DLY'D SWP Display Mode.

lime Measurements can be made from the display

in the conventional manner. Sweep rate is determined by

the setting of the DLY'D

TlMElDlV OR DLY TIME switch to a sweep

dial to the part of the display to be

Time/Division switch.

iB)

Delayed sweep display.

Fig.

2-14.

Using

delayed

10. The apparent sweep magnification can be calculated by dividing the setting by the DLY'D

Example.

shown in Fig. 2-14 with a

ms and a DLY'D Time/Divisionswitch setting of 10 ,us

of is:

Apparent

Magnification DLY'D Time/Division setting

Substituting the given values:

~pparent

Magnification

The apparent magnification is 10 times.

The apparent magnification of the display

TIME/DIV OR DLY TlME setting

...

"..

--.

sweep

for

magnification.

TIME/DIV OR DLY 'TIME switch

Tirne/Division switch setting.

IIME/DIV OR DLY TlME setting

o-~

lom5

2-18

JUN

1980

Operating

7B53A

Instructions-7B53A/7B53AN

Triggered Delayed Sweep Magnification

The delayed sweep magnification method just described may produce too much jitter at high apparent magnification ranges. The Triggered Delayed Sweep Mode (DLY'D TRlG LEVEL control rotated out of switch detent) provides a more stable display, since the delayed

sweep display is triggered at the same point each time.

Set up the display as instructed in steps 1 through

in the Delayed Sweep Magnification procedure.

Rotate the DLY'D TRlG LEVEL control in a

counterclockwise direction but out of switch detent for a

triggerable delayed sweep. Select the desired DLY'D

SLOPE, COUPLING, and SOURCE.

Adjust the DLY'D TRlG LEVEL control to produce

an intensified portion on the display.

Inability to produce an intensified portion of the display indicates that the DLY'D TRlG controls are incorrectly set, or that the signal does not meet triggering requirements. If the condition cannot be remedied with

the DLY'D TRIG controls or by increasing the display

amplitude (lower

the delayed sweep.

Volts/Division setti ng), externally trigger

Use the following procedure:

1. Set up the display as given in steps 1 through

Delayed Sweep Magnification.

Time measurements can be made from the display in the conventional manner. Sweep rate is determined by the setting of the DLY'D

Example.

displayed on the crt. The circled portion of the waveform cannot be viewed in any greater detail because the sweep is triggered by the larger amplitude pulses at the start of the display and a faster sweep rate moves this area of the waveform off the viewing area. The second waveform shows the area of interest magnified 10 times using

Delayed Sweep. adjusted so the delayed sweep starts just before the area of interest.

Fig. 2-15 shows a complex waveform as

The DELAY TIME MULT' dial has been

lime/Division switch.

5. When the correct portion of the display is intensified, press in the DLY'D DLY'D SWP Display Mode, slight readjustment of the

TRIG LEVEL control may be necessary to produce

DLY'D a stable delayed sweep display.

Measurement and magnification are as described

above in Delayed Sweep Magnification discussion.

Time/Division switch for the

Displaying Complex Signals Using Delayed Sweep

Complex signals often consist of a number of individual events of differing amplitudes, Since the trigger circuits are sensitive to changes in signal amplitude, a stable display can normally be obtained only when the sweep is

triggered by the

However, this may not produce the desired display of a lower-amplitude portion which follows the triggering event. The delayed sweep feature provides a means of delay~ng the start of the delayed sweep by a selected time

following the event which triggers the main sweep

generator. Then, the part of the waveform which contains

the information of interest can be displayed at thedelayed

sweep rate.

event(s) having the greatest amplitude.

Fig. 2-15. Displaying a complex signal using delayed sweep.

JUN

1980

2-19

Operating

7B53A

Instructions--.7B53A/7B53AN

Pulse Jitter Measurement

In some applications it is necessary to measure the amount of jitter on the leading edge of a pulse or jitter between pulses.

1. Connect the signal to be displayed to the input connector of the vertical unit. Set the Vertical and Horizontal Mode switches on the indicator oscilloscope to display the plug-in units used.

2. Set the produce a display about four divisions in amplitude.

Adjust the MAIN TRIGGERING controls for astable

display.

Set the 'TIME/DIV OR DLY TIME switch to a sweep

rate which displays the complete waveform (see Fig. 2-14).

5. Pull out the DLY'D

INTEN Display Mode.

Volts/Division switch on the vertical unit to

'Time/Division switch for the

Example.

Assume that the horizontal movement is 0.5 division (see Fig. 2-16) and the DLY'D switch is .5 ps.

Using the formula:

horizontal DLY'D

Pulse Jitter

jitter

Tirne/Division

(divisions) setting

Substituting the given values:

Pulse Jitter

0.5 X 0.5 ps

The pulse jitter is 0.25 ps.

Time/Division

6. Position the start of the intensified portion with DELAY TIME MULT dial to the part of the display to be magnified.

Set the DLY'D Time/Division switch to a setting which intensifies the full portion of the display to be magnified. 'The start of the intensified trace wili remain as

positioned in step 6.

Repackaging for Shipment

If the Tektronix Service Center for service or repair, attach atag showing: owner (with address) and the name of an individual at your firm that can be contacted, complete

Press in the DLY'D Time/Division switch for the

instrument serial number and a description of the service

DLY'D SWP Display Mode. required.

Slight readjustment of the MAIN TRIGGERING LEVEL control may be necessary to produce as stable a display as possible.

Save and re-use the package in which your instrument was shipped. If the original packaging is unfit for use or not available, repackage the instrument as follows:

Surround the instrument with polyethlene sheeting to

protect the finish of the instrument. Obtain a carton of

10. Pulse jitter is shown by horizontal movement on the pules (take into account inherent jitter of delayed sweep). Measure the amount of horizontal movement. Be sure that both vertical and horizontal VARIABLE controls are set to CAL.

corrugated cardboard of the correct carton strength and having inside dimensions of no less than six inches more than the instrument dimensions. Cushion the instrument by tightly packing three inches of dunnage or urethane foam between carton and instrument, on all sides. Seal carton with shipping tape or industrial stapler.

11. Multiply the distance measured in step 10 by the Time/Divisionswitch settingtoobtain pulsejitter in

DLY'D

The carton test strength for your instrument is 200

time. pounds.

I I

L+-

Measuring pulse jitter.

1342-1

Fig.

Jitter

2-16.

"Pektronix instrument is to be shipped to a

2-20

JUN

1980

Section

7B53A

3.-

--7B53Al7B53AN

THEORY

Introduction

'This section of the manual contains adescription of the circuitry used in the description begins with a discussion of the major circuit functions using a simplified block diagram.

SIMPLIFIED

The Simplified Block Diagram, Fig. 3-1, shows interconnection of the basic 7B53A17853AN. In some cases, such as the Main Sweep Trigger, the block includes a number of separate circuits. The individual circuits are discussed in detail later in this section.

7B53A/7B53AN Dual Time Base. The

BLOCK

DIAGRAM

c~rcuit blocks in the

Main Sweep Mode

When the TIME/DIV OR DLY TIME switch is set to

MAIN SWP, operation is as follows:

select

Main Sweep Trigger.

selecting the trigger source, type of coupling, triggering mode, and point on the trigger signal where triggering occurs. Also, regardless of the trigger signal shape or amplitude (within fast-rise, uniform-amplitude Comparator. Termination of the pulse (or gate) occurs at the rise of Main Sweep

'This block includes circuitry for

specification], this circuitry provides a

pulseto the Main Sweep Start

Holdoff.

OPERAT

side is set by the Main Swp Stop adjustment. When the sawtooth waveform passes through thesetting of the Main Swp Stop adjustment, the output of the Sweep Stop Comparator switches to a positive level. Phis positivestep is applied to the Main Sweep

Main Sweep Hoidoff.

is used to prevent generation of a trigger signal until the sweep circuits have stabilized after a sweep. The positive step from the Sweep Stop Comparator initiates the positive holdoff gate. The duration of the hold off gate is variable, depending on the setting of the switch. Holdoff timing capacitors are separate from sweep timing capacitors.

Output from the Main Sweep Main Sweep Trigger and the Delayed Sweep circuit. A trigger signal cannot be generated during the holdoff interval. The holdoff serves to reset the trigger circults so that they are ready to receive an input trigger s~gnal after holdoff.

Horiz Output.

Horiz Amp. Position Amp, Horiz Display Selector, and Horiz Out Amp circuits.

Holdoff is longer for slower sweep rates.

The Horiz Output block includes the Ext

Holdoff.

This circuit develops a gate which

TIMEIDIV

Holdoff is coupled to the

DLY 'PIME

Holdoff

Main Sweep Start Comparator.

by the positive gate from the Main Sweep Trigger. output signal coupled tothe Main Sawtooth Generator isa positive gate with the same duration as the sweep. This gate is also coupled to the Sweep Gate Out. A going gate (coincident with the positivegate) iscoupled to

the Delayed Sweep Lockout Multi and the Delayed Sweep

Start Control.

Main Sawtooth Generator.

developed by the Main Sawtooth Generator. When a positlve gate from the Main Sweep Start Comparator is applied, a sawtooth waveform is generated. The sawtooth duration is determined by the positive gate of change of the sawtooth is set by Ct and Rt, selected by

the

"rIMVDIV switch.

Sweep Stop Comparator.

is driven by the

REV

JAN

1985

maln sweepsawtooth signal, andthe other

This circuit is activated

The

negative-

The main sweep signal is

durat~on. Rate

One side of this comparator

W~th the TIME/DIV OR DLY TIME sw~tch set for maln sweep, thls circuit selects the signal from the Maln Sawtooth Generator, amplifies the s~gnal, and converts the single-ended input to a push-pull output signal. Dc

positioning

level is also applled to th~s block.

Delayed Sweep Mode

To generate the delayed sweep, the Main Sawtooth

Generator must

Delay Pickoff.

whlch starts when the main sawtooth signal passes through the level selected by the DELAY

control. The gate ends output signal is coupled to the Delayed Sweep Holdoff

circuitry.

flrst be gated on (see Main Sweep Mode).

This circuit supplles a

w~th the maln sawtooth signal. The

positive

rlME MULT

gate

Theory of

7B53A

Operation--7FT53A/7B53AN

*,-

---

--.---

-".------

"------

Fig.

3-1.

7653A17B53AN

Simplified

-----"--

Block

Diagram.

REV

JUN

1980

Theory of

7B53A

Operation--'SB53A/7B53AN

Delayed Sweep Trigger.

is set to RUNS AFTER DLY TIME (intoswitch detent), the output trigger is generated as soon as the delayed gate is applied. If the DLY'D TRIG LEVEL control is in the triggerable mode (out of switch detent), the output trigger is initiated by the next input trigger that occurs after the

Delay Gate is applied.

The Delayed Sweep Trigger output is a positive gate which is terminated by the step from the Delayed Sweep Stop circuit. The positive output gate is coupled to the Delayed Sweep Start Multi.

Sweep

Delayed Sweep Trigger causes the Delayed Sweep Start ~ulti to flip so that a positive gate is coupled to the Delayed applied to the are the same in duration as the positive gate from the Delayed Sweep 'Trigger.

Sweep Start

~ixed Sweep Comparator. The output gates

Delayed Sweep Start Control.

of operation the Delayed Sweep Start Control serves to

the

positive gate

Mu'ti

Gate Out.

and the Delayed Sweep Lockout Multi are not effective in

this mode.

the Sawtooth

lnput signals from the Main Sweep Start Comparator

Delayed Sawtooth Generator.

signal is developed by the Delayed Sawtooth Generator.

The sawtooth is generated during the time that a positive gate is applied from the Delayed Sweep Start Control. Rateof change of thesawtooth isset by Ct and Rt, selected by the

TIME/DIV (Dly'd) switch.

The sawtooth output signal is coupled to the Mixed

Sweep Comparator and the Horiz Output circuits.

Delayed Sweep Stop Circuit.

the output of the Delayed Sweep Stop circuit when the delayed sawtooth passes through the level selected by the Dly'd Swp Length adjustment. This step is coupled to the Delayed Sweep Trigger and the Delayed Sweep Lockout Multi.

When the DLY'D TRIG LEVEL

Holdoff signal or the positive

Start

Control, and a negative gate is

For delayed sweep mode

from the

A positive step occurs at

signal

and

the

The delayed sweep

the

Start

Mixed Sweep Mode

In this mode of operation, the sweep is first running at

the main sweep rate and then, after the selected delay discussion. Circuits which are commonly used in the

interval, runs at the delayed sweep rate. The main sweep

and delayed sweep are initiated as previously described. Operation of other circuit blocks follows.

Mixed Sweep Comparator.

whether the delayed sweep generator runs at the main sweep rate or at the delayed sweep rate. Before the delay gate is generated (delay gategenerated at delay determined by the setting of the DELAY

the main sweep sawtooth signal is coupled through the

Mixed Sweep Comparator, causing the delayed sweep generator to run at the main sweep rate. sawtooth signal iscoupled

When a positive gate from the Delayed Sweep Trigger is

applied to the Delayed Sweep Start Multi (at Delay Pickoff

determined by the DELAY TIME MULT dial setting) a negative gate is generated and coupled to the Mixed Sweep Comparator. This opens the Mixed Sweep Comparator, preventing the Delayed Sweep Generator from

running Delayed Sweep Generator is released to run at the delayed sweep rate.

the main

sweep

Delayed Sweep Lockout Multi.

the Delayed Sweep Stop circuit is inverted by the Delayed Sweep Lockout Multi and to the Delayed Sweep

Start Control, thus turning off the Delayed Sawtooth Generator.

Sweep Gate Out.

TIMEIDIV switch, thisstage couplesthe positivegatefrom either the Main Sweep Start Multi or the Delayed Sweep Start Control to connector Al. The Sweep Gate signal serves to unblank the crt in the Oscilloscope during the sweep.

Depending on the selection of the

This circuit determines

pickoff as

TIME MULT dial)

'The resulting

tothe Horizontal Output stage.

rate.

simultaneously, the

The positive step from

External Horiz lnput

When the TIME/DIV switch is set to AMPL, part of the Main Sweep Trigger circuitry becomes the Horiz lnput Amp. An external signal connected to the or AMPL input is amplified and then coupled to the Horiz Output stage. The main and delayed sawtooth generators are disabled to prevent intensity modulation of the crt trace by the unblanking waveforms.

CIRCUIT

OPERATION

MAIN 7'HIG

General

This section provides a detailed description of the

electrical operation and relationship of the circuits in the

7B53A/7B53AN. The theory of operation for circuits unique to this instrument is described in detail in this

electronics industry are not described in detail. If more

REV

JUN

1980

3-3

Theory

7B53A

Operation--7653M7653AN

information is desired in these commonly used circuits, refer to the following text-books.

Phillip Cutler, "Semiconductor Circuit Analysis", McGraw-Hill, New York. 1964.

Lloyd Electronics", second edition, 1962

Jacob Millman and Herbert Taub, "Pulse, Digital, and

Switching Waveforms",

'The main headings in this circuit analysis refer to

schematics in the diagrams section with the same name.

The sub-headings indicate the

descri bed

"The Main 7 rigger Preamp coverts t he push-pull internal trigger signal trrgger source and coupling for the Main Generator, Fig. 3-2 shows a detarled block diagram of the Main shown on diagram

Trigger Preamp.

Vert~cal Deflection System is converted output Q61 drives current gain stage output

Hunter (Ed.), "Handbook of Semiconductor

McGraw-Hill, New York,

McGraw-Hill, New York, 1965.

indivrdual circuit being

MAIN

Trigger Preamp The schematfc of thrs circuit is

by is set by internal Trig DC Bal Control, R72

TRlGGER

toasingle-endedsignal and selectsthe main

at the rear of this manual

The push-pull trigger signal from the

emitter-coupled stage Q52-Q61. 7 he output of

PREAMP

Q66-Q70. Thedc level of the

Trigger

a singfe-ended

shows a detailed block diagram of the Main Generator, the schematic of this circuit d~agram 2 at the rear of thls manual,

lnput Stage.

a hrgh input rmpedance for the trigger signal provides and the rnput source lnput protection diode protects (2310 from excessive input s~gnals by clamping the gate of the tnput FET rf the rnput exceeds aoout 7he signal at the source of Q310 em~lter-follower Q315 to the base of Q320 in the Slope Comparator and to the External Horizontal circuit

Slope Comparator.

difference amplifier to provide selection of the slope and level

at voltage for the comparator is provided by LEVEL control R4

and Main 1 rrg Level Center control R333 R333 sets the

level at the base of

0 V dc level of the incoming trigger when the LEVEL

the

control is centered When MAIN TRIGGERING control R4 approximately input of level of the trrgger signal As the LEVEL control clockwise, the more positive level before comparison takes place The resul-

tant crt display starts at a more

displayed signal When the ~ounterclockwrse from 0, the result is the opposite oi the above more negative point along the

Q320, thus switchrng the comparator at the 0 V

posittve Now the trigger signal must rise to a more

reactron and produces a crt dtsplay that starts at a

The input source-follower, Q310, provtdes

fsolation between the Mar n rrigger Generator

is passtng through

Q320 and Q322 are connected as a

which the sweep is triggered The reference

(2322 so that the display is triggered at

set to midrange, the base of (2322 is at 0 V This corresponds tothe 0 Vlevel at the

voltage level on the base of Q327 becomes

posltive point on the

LEVkL control is turned

slopeof thetrigger signal

shown on

LEVkL

turned

rigger

also

CR307

lnput Switching.

switch, trlgger sources are

The external signal may also be passed through a

attenuator network.

offers a means of attenuating high or low frequency components of the trigger signal. In addition to ac and dc

coupling, C23-R23 can be selected to provide frequency attenuation and R25-C25-C26 for highfrequency attenuation

$70, selects the source of the trigger signal Three

The

MAIN TRiGGERING COUPLING swrtch, 520,

MAIN TRIGGER GENERATOR

(SN B2WO00

The Main Trigger Generator provides selection of the

level and slope where triggering occurs and supplres a fast-rrse pulse to the marn sweep start comparator. Fig 3-3

Phe MAIN TRIGGERING SOURCE

available;

internal, line, and external

1PB53A

ONLY)

low-

3-4

R326 establishes the emitter current for Q320 and Q322,

The transistor with the most posrtrve base controls conduction of the comparator. For example, assume that the ger signal from the input stage is pos~twe-go~ng and Q320 forward biased. The rncreased current flow through R326 makes the

held constant by the level control voltage, the current

through Q322

Q320 makes the voitage

the decrease

of U350 more posrtrve.

em~tter of Q322 more positive and since the base

decreases. The increased current through

pin t 4

of U350 less positive, and

current through Q322 makes voltage

tfrg-

prn

Trigger Generator

An Integrated circuit converts the trrgger signal from

the

tr~gger comparator to a gate waveform used for sweep

control With pin positive-goi ng waveform on the rnput (pin 13) causes pin 3 (output) to rise to about 4.1 V and pin 4 (output) about 3 2 V Prn 14 is negatrve going under the above cond~tions The output gate occurs when pins 13 and 14 are within about 40

connected to ground

mV of each other. Opening p~n 1

(

SLOPE), a

todropto

REV

JAN 1985

Theory of Operation-7B53A/7853AN

7B53A

REV

JUN

1980

Fig.

3-2.

Trigger Preamp and Input Switching Block Diagram.

Theory

7B53A

Operation--7853A/9B53AN

Fig.

3-3.

Main Trigger Generator

Block

Diagram

(SN

8210000

and

7853A Only).

REV

MAY

1983

Theory of Operation-71353A17B53AN

7B53A

(

---

SLOPE) creates an output gate at pins 3and 4 when pin 13 is negative going and pin 14 positive going. The output of pin 4 is inverted by (during

14.2 V). This action inhibits the trigger generator until positive. Notice that thesignal currentsatthecollectorsof

these pins drop to about time.

holdoff time)

MAlN

TRIGGER

(SM

'The Main Trigger Generator provides selection of the level and slope where triggering occurs and supplies a fast-rise pulse to the main sweep start comparator. Fig. 3-4 shows a detailed block diagram of the Main Trigger Generator; the schematic of this circuit is shown on diagram 2 at the rear of this manual.

Input Stage.

a high input impedance for the trigger signal. It also provides isolation between the Main Trigger Generator and the input source. lnput protection diode protects (2310 from excessive input signals by clamping the gate of the input 'The signal at the source of Q310 is passed through emitter-follower Comparator and to the External Horizontal circuit.

Slope Comparator.

difference amplifier to provide selection of the slope and level at which the sweep is triggered. The reference voltage for the comparator is provided by LEVEL control R4 and Main Trig Level Center control level at the base of Q322 so that the display is triggered at

0 Vdc level of the incoming trigger when the LEVEL

the control is centered. When control R4 is set to midrange, the base of Q322 is at approximately input of level of the trigger signal. As the LEVEL control is turned clockwise, the voltage level on the base of Q322 becomes more positive. Now the trigger signal must rise to a more positive level before comparison takes place. The tant crt display starts at a more positive point on the displayed signal. When the LEVEL control is turned counterclockwise from 0, the result is the opposite of the above reaction and produces a crt display that starts at a more negative point along

0 V. This corresponds to the 0 Vlevel at the

Q320, thus switching the comparator at the 0 V

Q352. After completion of thesweep

pins 6 and 10 are high (about

3.2 V, which occurs after holdoff

GENERATOR

8209999

The input source-follower, Q310, provides

FET

Q315 to the base of Q320 in the Slope

Q320 and Q322 are connected as a

BELOW)

iftheinput exceedsabout 15 V.

R333. R333setsthe

MAlN TRIGGERING LEVEL

thei- slopeof thetrigger signal.

CR307

resui-

voltage, the current through Q322 decreases. The increased current through of U350A less positive, and the decrease in current through Q322 makes voltage at pin 10 of U350C more

Q320 and (3322 are opposite in phase. The sweep can be triggered from either the positive or negative edge of the input signal. The selection is made by SLOPE switch

When SLOPEswitch S4 is set to

R347 and

providing a low voltage level at pin 5 of is also applied to pins 6 and inverted by

U350C. 'Thus, pin 14 of U350C goes low, as does pin 13 of

U350D. Since pin 11 of U350C is high, pin 1Oof U350C has

no effect. If pin 4 of

12 of

high and the output at pin 3 of inverter

However, if pin 4 of

and the output at pin 3 of 3 of

U355B follows the input at pin 4 of U350A.

When the SLOPE switch 54 is set to to pin 5 of Pin 12 is held low, regardless of what happens at pin 4 of

U350A. The I 5 V at pin 5 of U350A which makes pin 11 of U350C go low. Pin 3 of U355B now follows the signal at

R341, R339, and CR340, (between pin 3 of U355B and pin 4 of R342, and CR343 provide regenerative feedback to pin 10

U350C.

In the reset condition, pin 15 of U375B is low, as is pin

U355D. When a negative pulse is applied to pin 4 of

12 of U350A, pin 3 of U355B goes low as well as pin 13 of U355D. 'Thus, pin 15 of U355D goes high, which sets pin 2 of

U375A to the high state and provides the sweep gate

output (trigger pulse) through Q382 and pin

Sweep Start Comparator. At the end of sweep, the

positive-going

Reset circuit through pin Q366 turns it on, causing pin 4 and 5 of coincident with the inverter

U375A goes low and terminates.

R346 decreases and activates U350A by

U350Bandthishighlevelisappliedtopin

U350D also goes high causing pin 9 of U350D to go

U350A. Pin 2 goes low, asdoes pin 120f U350D.

U350A), prov~de regenerative feedback. R343,

holdoff pulse is coupled to the Sweep Gate

U355A goes high and resets U375A. Pin 2 of

(2320 makes the voltage at pin 4

thevoltage between

U350A. A low level

of U350B. The iow level is

11 of

U350A goes low, pin 2 goes high. Pin

U355B to go low.

U350A goes high, the process reverses

U355B also goes high. Thus, pin

-1

15 Vis applied

inverted by U350B,

pin 10 of U350C.

to the Main

The high level at the base of

U355A to go low

holdoff pulse. Therefore, pin 2 of

S4.

R326

establishes

Q322

conduction

the trigger

and Q320 through R326 and slnce the base is held constant by the level control 13 of U355D

cii!

he transistor with the most positive base controls

of the comparator For example, assume that

s~gnal from the input stage is positive-going

forward-b~ased The increased current flow

JUN

1380

the emitter current for Q320 and

makes

the

emitter

of (2322 more

positive,

The hlgh at pln 2 of U355A sets U375B. causing pin 12

U355D to go high and locking out any trigger pulse durlng the holdoff per~od Wh~le pin 12 of U355D pin 15 of U355D w~ll stay low regardless of the state of pln

h~gh,

3-7

Theory

7B53A

Operation-SBS3AITB53AN

Fig.

3-4.

Main Trigger Generator Block Diagram

(SN

8209999

and below).

JUN

1980

Theory

7B53A

Operation---7853Al7B53AN

Trigger Lockout Latch U375B can only be reset when

Trig'd Sweep Gate Latch

of U375A low, pin 11 of U355C low, and pin 13 of

(pin U355D high). Therefore, if pin 13 of U355D islowwhenthe holdoff pulse terminates, U375B will stay set. When pin 13 of U3555 goes positive, pin causing a positive level at pin 14 of level resets trigger lockout latch U355D to go negative and allowing the next negative

transition at pin 13 of

U375A. This generates a new sweep gate at pin

latch

MAlN

The Main Sweep Generator circuit produces a saw-

tooth voltage which is amplified by the Horizontal

Amplifier circuit to provide horizontal sweepdeflection on

the crt of the indicator oscilloscope. This output signal is

generated on command (trigger pulse) from the Main Trigger Generator. produces a Main Sweep Gate pulse coincident with the

time that the Main Sweep runs. 'The Main Gate pulse is

processed by the Sweep Gate Out circuit and the indicator

oscilloscope for crt unblanking and Auxiliary Gate output.

In addition, the Main Sweep Generator produces several

control signals for other circuits within the instrument.

Fig. 3-5 shows a detailed block diagram of the Main Sweep Generator and theschematic is shown on diagram 3at the rear of the manual.

The MAlN TRIGGERING MODE switch allows three

modes of operation. When the NORM button is pressed, a sweep is produced only when a trigger pulse is received from the Main Trigger Generator circuit. When the

button is pressed, a sweep is produced as in NORM except that afree-running trace is displayed when a trigger pulse is not present. SINGLE SWP operation is also similar to

NORM operation except that the sweep is not recurrent. The RESET button must be pressed to view another trace. The following circuit description is given with the MAlN TRIGGERING MODE switch pressed to NORM.

Difference in operation for the other two modes is discussed later.

SWEEP

U375A is in the reset condition

of U355C goes negative,

U355C. This positive

U3758, causing pin 12 of

U355D to set the trigger sweep gate

GENERATOR

The Main Sweep Generator also

AU1-0

Main Sweep Start Comparator

Q544, (2547, and Q551 compose the Main Sweep Start comparator. In the absence of a trigger, Q544 is off and (2547 is held on by the high level from pin 3 of U520. The collector of (2547 is low and this low is coupled through

emitter-follower Q551 to pin sweep. When the Main Trigger Generator supplies a trigger, the positive transition is coupled to the base of Q544. The base of Q544 rises abovethe level at the base of Q547 and the current through common emitter resistor R545 is diverted from Q547 to rises and the positive step is coupled through emitterfollower

(2551. The positive step appears across divider

of U580, thus preventing a

(2544. The collector of Q547

R555/R556, causing pin 1 of U580 to go positive and start

the sweep.

Sawtooth Generator

The lower half of the U580 diagram symbol constitutes

a Miller Integrator. When pin

sawtooth (positive-going) is generated and appears at pin

8. The timing components (Rt and

and waveform.

being coupled into U580 by way of C579 and pin 9.

determine the rate of change of the sawtooth

(2596 prevents high-speed error currents from

is positive, a linear

Ct),

connected to pins 8

Sweep Stop Comparator

The Sweep Stop Comparator consists of Q564 and Q568. l n the absence of a sawtooth signal at pin 8 of U580, (2568 is conducting and Q564 is held off by the positive level set at its base by adjustment. When the sawtooth voltage at pin 8 of U580 raises the base of Q568 higher than the base of turns off and Q564 turns on. The collector of and the positive step is coupled through emitter-follower Q538 to pin 16 of U520 and sweep

R564, the Main Sweep Length

Q564, Q568

(2564 rises

holdoff begins.

Hofdoff Circuit

The Holdoff Circuit consists of pins 8, 10, 16, and 17 of

U520 plus

TIMEIDIV switch. The holdoff prevents re-triggering the

sweep generator until after the has discharged and the sweep circuits are again ready to

generate a sweep.

At the end of the sawtooth waveform, a positive step is coupled to pin 16 of U520 by way of the Sweep Stop Comparator as previously described. The positive pulse seen at pin 16 of U520 is coupled internally through U520 to pin 17 and in turn to (2362 in the Main Trigger Generator. The Main Trigger Generator is reset and the output at connector pin Q547 turns on. The collector of Q547 drops and the negative step is coupled through emitter-follower thus ending the sweep.

After a time determined by the timing components at pin 8, internal circuitry within U520 switches pin 17 to its low state and ends the is released to generate a trigger signal.

negative gate, coincident with the positive holdoff gate, appears at pin 10 of (2528 and coupled to the Delayed Sweep Generator for

composite

and C time constants selected by the

sweep timing capacitor(s)

goes low. As a result, (2544 turns off and

holdoff gate. 'The Main "Trigger Generator

U520. fhis negative gate is inverted by

holdoff functions.

Q551,

REV

MAY

1983

3-9

7B53A

Fig.

3-5.

Main Sweep Generator

Block

Diagram.

JUN

1980

Trig'd

7B53A

Lamp

Driver

When the main sweep gate is high and the sweep is

running, the

RIG'D lamp is on. At all othertimesthe lamp

is off.

Delay Pickoff

The upper half of thediagram symbol for U5801ncludes the Delay Pickoff circuitry. lnsrde U580, the maln sweep savvtooth signal is applred to one side of a comparator ctrcuit. Ptn 6 1s connected to the other side of the

comparator control R9 determines the po~nt on the main sweep sawtooth at which the comparator switches.

When the comparator switches (delay

a positive gate appears at pin

termlnates at the end of the main sweep sawtooth.

The positive-going gate at pin

through emitter-follower Q584 to the Delayed Sweep

Holdoff Generator via Q671.

Auto

Triggering Mode

Operation of the Main Sweep Generator circuit rn the AUI O position of the MAIN TRIGGERING MODE switch is the same as for NORM trigger pulse

not present, a free-running reference trace is produced in

the AUTO position

he Auto Triggering circuit consists of pins

19 of

TRIGGERING MODE sw~tch is pressed, a low at pin 19 of

U520 enables the Auto Circuit. When a repetitive trigger signal above 30 to the Main Sweep Start Comparator and internal Auto volts through incorn~ng trigger pulse.

In the absence of a trigger pulse, 6535chargestowards

i-5

switching pin 6 to rts hlgh state and pin 3 to its low

Q547 turns off, its collector rises and a high is

state.

coupled through emitter follower

causing the sweep to run.

Single

Sweep

Operation of the Main Sweep Generator In theSINGLE

SWEEP position of the MAIN TRIGGtHING MODEswitch

slmllar to operation in the NORM pos~tion as previously

described

sweeps are inhibited until the RESET button READY lamp ready to accept a

he setting of DELAY TIME MUL'TIPLIER

pickoff occurs),

of U580.

of U580 is coupled

his gate

pos~tion just described when a

is applied. However, when a trigger pulse is

This occurs as follows:

f,3,6,

and

U520. When the AUTQ button of the MAIN

Hz,

and of adquate amplitude, is applied

prn f of U520, the

Mufti at pin 6 of US20 charges towards five

(2535 and R535, but is discharged by each

(2551 to pln 1 of U580,

Operation

However, after one sweep has run, all other

pressed. A

provided to indicate when the sweep is

trlgger

The Single Sweep circuit consists of pins 11, 12, 14, 15,

and 17 of

supply is applied

of U52C goes positive, preventing generation of a sweep. When the momentarily

U520. For SINGLE SWP operation, the 5

of U520. The holdoff pulseat pin

RESET button is pressed, pin 35 is

held to ground and pin

goes low to allow

the Main Trigger Generator to accept a trigger. The

holdoff line (pin 17 of U520) stays low until a sweep has

been completed. At this time, the

17 and stays in the

holdoff state until the RESET button is

holdoff pulse risesat pin

pressed.

Q524 acts as a switch for the READY lamp. When the

holdoff gate at pin 17 is high, preventing the sweep

generator from accepting a trrgger, pin

is high and Q524 and the READY lamp are off. When the RESET button is pressed, the

holdoff gate at pin 17 goes low and allows the Main Sweep Generator to accept a trigger. Pin 11 rises and turns on

Q524, which prov~des the current to

turn on the READY lamp.

Sweep

Lockout

(2513, (2516, Q538, and pins 3, 16, and 18 of U520 compose the Sweep Lockout circuit. The Sweep Lockout circurt

functional when the 7553A17B53AN is installed

in the B

Horrzontal compartment of an indicator 0scrlloscope that accommodates two horizontal plug-in units and it Mode, or to operate the sweep unit. Lockout is applied to the

desired tooperate ~n the Alternate Horizontal

7553A/7553AN as a delayed

7B53N7B53AN during the time that the sweep from the assocrated tlme base is displayed

The indicator oscilloscope controls initlation of a

sweep by

supplyrng current to the base of (2513 when lockout is required. This current causes a positive step at pin 18 of

U520. Pin 3of U520 steps positive and Q547lurns on. The collector of Q547 falls and the low is coupled through emitter-follower

Q551 to pin I of U580, thus

preventing the sweep. If lockout is initiated while the

sweep differentiated through emitter-follower

running, the leading edge of the lockout pulse is

C519 and R519, coupled through

Q538, and appears as a htgh at

of U520. I-his starts the holdoff cycle. (The holdoff cycleisas described previously.)

Delayed Mode Control

When the TB53A17B53AN is installed in the B Horizon-

tal compartment of an indicator oscilloscope with two

horizontal compartments, the Delayed Mode Control determ~nes whether the 7553A/7553AN operates as an independent time base or as a delayed sweep triggerable after delay time mode. When approximately to

4.5

present at interfaceconnector

of U520), the Auto Circuit (previously described) is

(and therefore

d~sabled. A sweep can be enabled only by a trigger pulse

unlt in

Theory

7B53A

Operation---711353A/7BS3AN

to the Sweep Start Comparator. During delay time,

determined by the settings of the delaying sweep unit, sweep lockout (previously described) inhibits the sweep. After delay time, the approximate zero Auto Circuit, causing the independent time base.

DELAYED TRIGGER

(SN

B210000

The Delayed Trigger Generator circuitry is essentially

the same as the Main Trigger Generator, except for the

Runs After Dly Time and modes. Therefore, only the circuitry involving these modes remaining delayed trigger circuitry, refer to the Main

block diagram of the Delayed Trigger Generator; the schematic is shown on diagram 4 at the rear of this manual.

DLY TIME, 55 grounds R457, which turns Q456 off and allows pin 16 of U450 to go high. This generates a new sweep gate at pin 4 of

will be described. For detailed description of the

rigger Generator discussion. Fig. 3-6 shows a detailed

When the DLY'U

7B53A17B53AN can be triggered. An

volt level at pin 13 of U520 enables the

7B53A/7B53AN to operate

GENERATOR

7B53A

Triggerable After Delay Time

TRlG LEVEL is set to RUNS AFTEH

U450.

ONLY)

low state and pin 2 of U455A goes to the high state. This sets

U475B. which generates a new sweep gate.

When the DLY'D "TRIG LEVEL control is in the

Triggerable After Dly Time mode, pin 4 of and pin the Delayed Trigger Generator operates in After Dly Time mode in a similar way as the Main Trigger

Generator operates.

voltage that is amplified by the Horizontal Amplifier circuits to provide a delayed sweep crt display. The sawtooth output voltage is generated on command of the

Delayed Trigger Generator. The Delayed Sweep

Generator also produces a Delayed Sweep Gate pulse, coincident with the time that the Delayed Sweep

Generator runs, to be processed by the Sweep Gate Out

circuit and the oscilloscope for crt unblanking. Fig. 3-8 shows a detailed block diagram of the Delayed Sweep

Generator and the schematic is shown on diagram 5at the

rear of the manual.

is tow. Therefore, pin 12of U475B is also low and

DELAYED SWEEP

The Delayed Sweep Generator produces a sawtooth

GENERATOR

U455A is high

theiriggerable

When the DLY'D TRIG LEVEL control is in the 'Triqqerable After Dly Time mode, (2456 is turned on, which allows pin 16 bf U450 to go low and the Delayed Trigger C3enerator operates in the Triggerable After D~Y

Time in a manner similar to the Main Trigger Generator

operatton.

DELAYED

The Delayed Trigger Generator circuitry is essentially

the same as the Main Trigger Generator, except for the

Runs After Dly Time and Triggerable After Delay Time modes. Therefore, only the circuitry involving these modes will be described. For detailed description of the remaining delayed trigger circuitry, refer to the Main Trigger Generator discussion. Fig. 3-7 shows a detailed block diagram of the Delayed Trigger Generator; the schematic is shown on diagram 4 at the rear of this manual.

When the DLY'D

DLY TIME, S5 grounds R469 and pin 4 of

to the low state. Thus, pin 2 of U455A wiil follow pln 5, but

reversed in polar~ty When the holdoff pulse is applied to

the base of

wh~ch resets U475B and

the holdoff pulse terminates, pin 4 of U455C goes to the the generation of the delayed sweep sawtooth.

TRIGGER GENERATOR

(SN

B209999

TRlG LEVEL is set to RUNS AFTER

Q466, pin 4 of U455C goes to the high state, the collector of Q608 (Dly'd Swp Start Multi) goes positive,

& BELOW)

terminates

U455A

the sweep gate. When Q610 couples the posltive gate to pin 1 of U650, lnitiatlng

forced

D'y'd

Swp

Start

Q603 and Q608 comprise the Dly'd Swp Start Multi. This clrcult ~608 normally conducting and Q603 off.

When the DLY'D Sweep Gate switches to its high state, the positive step appears at the base of the multi a positive step through remains in the positive state for the duration of the delay gate. At the end of the delay gate, the Dly'd Swp Start Multi reverts to its original state with Q603 off and

Dly'd

The Dly'd Swp Start Control circuit ~ncludes Q656,

Q654, and Q610. rhis clrcuit couples a posltivegateto pin 1 of U650

which a sawtooth is generated

In all Display Modes except MIXED, Q656and Q654are inactive due to the (through

connected as a blstable multlvibrator, with

Q603. This causes

toflip, soQ603ison and Q608isoff, thuscausing

(2610 to pin 1 of U650. (2608

Swp Start Control

(Mlller Integrator) to control the period during

5 V applied to the base of Q654

CR654 and Q280) from the t5 V supply. When

Q608 on.

3-12

JUN

1980

Theory of

7B53A

Operation---7853A/7B53AN

REV

JAN

1985

Theory of

7B53A

Operation---7B53A/7B53AN

Fig.

3-7.

Delayed Trigger Generator Block Diagram

When operating in the MIXED Display Mode, the anode circuit of Multi is negative-going at the base of current from

gate

CR654

is open. Thegate from the Main Swp Start

(2654

coupled to pin 1 of

forward biases

U650.

Q654.

Q670,

The resulting

and a positive

Mixed Swp Comparator

(2678, (2682, (2684,

Comparator circuit This circuit

running at the

When the

VARIABLE

is forward biased. The main sweep sawtooth at theemitter

(and thus, the collector) of T'his causes a ramp of increasing current through During the time that a Delay Gate is not being generated,

and

Q688

comprise the M~xed Swp

determines

main

sweep or delayed sweep rate

control is pulledfor MIXED,

Q682

is a positive-going ramp.

whether

U650

Q682

(2684.

3-14

(SN

6209999

Q603

(Dly'd Swp Start Multi) is biased off and

thls condition, operational amplifier. collector of

U650,

(2684

running at the main sweep rate.

When the Delay Gate is generated, the Generator forward biases through

R684

operational amplifier loop.

and below).

Q678

is on.

U650, Q678, (2684,

and

Q688

form an

"The negative-going ramp at the

becomes a positive-going ramp at pin

DelayedTrigger

Q603.

The collector current

reverse biases

U650

(2678,

opening the

is released to run at the

delayed sweep rate. Therefore, the sawtooth at pin

U650

will flrst run at the main sweep rate and then change to the delayed sweep rate when the Delay Gate generated.

JUN

1980

Theory

7B53A

Operation--7B53A/7E(53AN

JUN

1980

Fig.

3-8.

Delayed Sweep Generator Block Diagram.

Theory

7B53A

Operation.-,.--PBS3Af7B53AN

Dly'd Swp Stop

Pins 4, 5, and 6 of U650 (plus external circuitry)

constitute the Dly'd Swp Stop circuit.

Dly'd Swp Length adjust

the delayed sweep sawtooth at which pin 4 of U650 goes

positive.

Dly'd Swp Lockout Multi

The operation of the Dly'd Swp Lockout and Holdoff

circuits is dependent on the following signals:

1. The Dly'd Swp Stop signal (positive-going) at pin 4

U650.

2. "rhe Main Sweep Holdoff signal (positive-going) by

way of

Q665 through

When the Dly'd Swp Stop circuit causes pin 4 of positive, positive-going main sweep, the positive going Main Sweep Gate pulse

turns on

main When the main sweep remains positive due to the negative going Dly Gate pulse applied to 1"IMVDIV OR DLY TIME switch and the DELAY TlME MUL'I' dial, the Dly Gate pulse rises, Q671 turns off, and the

R673.

The Main Sweep Gate (positive-going) at the base of

CR662.

4. The Dly Gate at the base of (2671.

Q659 and Q665 form the Dly'd Swp Lockout Multi.

Q659 turns on and Q665 turns off, coupling a

holdoff pulse to pin G. At the end of the

Q665and itscolIectorfalls. But the positive-going

holdoff pulse through R673 keeps pin G positive.

Q671. After the delay time determined by the

holdoff pulse at pin G goes negative.

(R652) determines the point on

and

holdoff pulsefalls, the level at pin G

The setting of the

Dly'd Swp Holdoff

U650to go

0696 and Q698 or (269.5 and Q698 (depending on TIME/DIV OR DLY TlME setting) are connected as an operational amplifier, providing a high degree of gain

stability.

Composite Swp

The Composite Sweep Gate Out circuit includes (2642, (2639, and (2647. The output at the collector of Q647 connects to interface connector pin indicator oscilloscope. In the AMPL position of the 'PIMEIDIV OR DLY 'TIME switch, connector A1 is set to approximately t4.3 V (via

Q647 serves DLY 'TIME switch set to either Q642 couples the main sweep gate to the base of Q647. When either DLY'D or MIXED SWP The gate signal at the emitter of Control) is coupled to the base of

Gate

Out

A1 for use in the

CR201) to unblank the crt.

asthe output stage. With the TIMVDIV OR

MAIN SWP or INTENS,

selected, Q639 is on.

(2610 (Dly'd Swp Start

Q647.

Aux Z Axis Control

The Aux Z Axis Control circuit includes (2628 and (2633. 'This circuit uses the indicator oscilloscope mode and switching levels to determine when the sweep signal

from the

Information of this type is normally used only when operating the oscilloscope.

intensify the terminal B7. positive level at its emitter.

7B53N7B53AN is being displayed on the crt.

7B53A/7B53AN in a four plug-in indicator

Typ~cal levels to cause the Aux Z Axis Control to

crt are i 5 V at terminal A16 and -0.6 V at

This forward biases (2633, resulting in a

When operating in the Delayed Sweep Stop signal (positive-going) at pin 4 of U650, turns on (2659. The negative step at its collector turns on Q656 and turns off level at the collector of Q654 is coupled through emitter follower of U650.

Q610, thus removing the positive level from pin

MIXED Display Mode, the

Q654. The resulting negative

Composite Swp Out

(2695, (2696 and Q698 form the Composite Swp Out circuit. When the I NTENS, Q696 is forward biased, coupling the main sweep sawtooth to the base of stage which couples the signal to output terminals

B3.

If DLY'D or MIXED SWP is selected by the TlMWDlV OR DLY TIME switch, (2695 is forward biased and couples the delayed sweep or mixed sweepsawtooth Q698.

TIME/DIV switch is set for MAIN SWPor

(2698. Q698 is an emitter-follower

A3and

tothe base of

When the indicator oscilloscope and the switch is set to INTENS, Q628 is off and Q633 is forward biased.

7853N7B53AN is used in a three plug-in

TIMWDIV OR DLY

Aux Z Axis Out

Q620 is the Aux Z-Axis Out stage. The output at connector DZ is connected to pin A17 on the interface connector and then to the Z-axis circuit in the indicator oscilloscope. A reduction in current through Q620 causes the crt trace to brighten.

For this description, assumethat the

used in a three plug-in indicator oscilloscope.

As described under Aux is selected by the TlME/DIV OR DLY TIMEswitch, Q633is turned on. The positive level at the emitter of Q633

Axis Control, when IN"TENS

7B53Af7853AN is

TlME

JUN

1980

Theory

7B53A

of Operation--7e353A/7B53AN

reverse-biases CR635, which reduces conduction of

Q620. 'The positive gate appearing at the emitter of (2610

(Dly'd SwP Start Control) during the delayed sweep further reduces current through Q620, causing the crt trace to intensify beyond the normal level of unblanking.

In all other selections of the TIME/DIV OR DLY TlME

switch,

off

saturation and the crt trace brightness is now set by the

unblanking signal (Sweep Gate).

signal (main or delayed sweep) and supplies an amplified

sawtooth signal to the horizontal circuits in the indicator

oscilloscope. In addition, this circuit containsthe horizontal magnifier circuit and the horizontal positioning

network. Fig. 3-9 shows a detailed block diagram of the

Horizontal Preamp and the schematic is shown on

diagram 8 at the rear of the manual.

Q628 is forward biased through CR285. This turns

Q633, which diverts current through CR635. Q620 is in

HORIZONTAL PREAMP

The Horizontal Preamp selects thesource ~f the output

Ext

Horiz

Amp

The Ext Horiz Amp consists of Q734. When the TIME/DIV AMPL,

Q734

external horizontal signal is blocked. When the TlMVDlV OR DLY TlME from the base of Q734 and the output signal is coupled

through

Horiz Display

Q724 and U720A,

Display Selector circuitry. Depending upon the setting of the mines which signal is coupled to the Horiz Out Amp.

When the

AMPL, from the

Simultaneously,

Mode Control circuit, ensuring that no internally

DLY

TIME

switch is in any setting except

the

holds

R734.

coupled through cR735

1.5

this

transistor

switchis set to AMPL, the 1-5 V is removed

off.

Therefore, any

the base

incoming

Selector

D, and E compose the Horiz

TlMElDlV

U720C is forward biased and couples the signal

DLY TIME switch, this circuit deter-

TlMEiDlV OR DLY TlME switch is set to

Ext

Horiz Amp to the Horiz Out Amp.

1-5 V is disconnected from the Display

JUN

1980

Fig.

3-9.

Horizontal Preamp Block Diagram.

'Theory of Operation--7B53A/7B53AN

7B53A

generated sweep signal is coupled through at this time. In all other positions of the

1-5

V is connected to the Display Mode Control circu~t

When MAIN SWP or INTENS is selected by the 'TIMWDIV OR DLY TIME switch, -t5 V is applied to the anode of couples the main sweep sawtooth to the Horiz Out Amp. Q724 is also forward biased so that any signal developed by the Delayed Sweep Generator is by-passed to ground

(via the -15 V supply). Any output from the Ext Horiz Amp

is coupled to ground through

When operating in the DLY'D SWP or MIXED Display Mode, CR265. This forward-biases U720B, which couples the delayed sweep or the mixed sweep signal to the Horiz Out Amp. sweep signal to ground.

Position

The POSITION control R8 sets the bias on (2720, thus

setting the dc current coupled to the Horiz Out Amp.

Horiz Out

The Horiz Out Amp includes (2754, Q764, and U744A,

C, and D. U744B and U744C are connected as an

operational amplifier, with

Cal Adjust,

U744C and U744D form a paraphase amplifier. This stage convertsthesingle-ended input signal to a push-pull output signal, which is necessary to drive the horizontal output stage in the indicator oscilloscope.

CR283. Phis forward biases U720A, which

1-5 V is applied to the base of U720B through

U720E is also forward biased, coupling the main

Amp

R290.

"TIME/DIV OR DLY TIME switch,

U720D.

R, being R768 and R, the Swp

1-hisstagealso Gain adjustment. When the MAG and R762 are connected in parallel with R759 and decreasing the emitter degeneration of the stage. This increases gain of the stage is set to provide a calibrated gain when magnified.

Q754 and U744A set the operating bias for the output stage. Q764 serves as a constant-current source for

U744C and U744D.

READOUT

The Readout Switching circuit consists of switching resistors that signal the oscilloscope readout system of the time-base unit sweep rate. The switching resistors are selected by the settings.

Refer to schematic diagram 7, Readout Switching, at the rear of this manual.

by resistors sweep); and by resistors Channel 2 (delayed sweep). selected by resistors

prefix

R903, and R901 for Channel 1; and by resistors R929,

R915, and R913 for Channel 2. Resistors R927 and R925 select the symbol

R939 and R926 select the symbol the VARIABLE calibrated position, R931 selects the symbol > (greater than) for Channel 1 and R922 selects the symbol Channel

R943 is switched out of the circuit for Channel 1 and R944 is switched out of the circuit for Channel 2.

R935, R923, and R921 for Channel 2. The time

(milli, micro, nano) is selected by resistors R928,

providestheX10magnification

XI0 button is out, R761

lotimes. The Mag Gain adjust

SWITCHING

lime/Division and XI0 MAG switch

The numbers 1, 2, or 5 areselected

R940, R907, and R905 for Channel 1 (main

R934, R911, and R909 for Channel 1; and by

(seconds) for Channel 1 and resistors

Time/Division control is in the Un-

When the MAG switch is in the XI0 position,

R941, R919, and R917 for

The number of zeros is

for Channel 2. When

and Mag

R766,

for

JUN

1980

Section 4--7B53N7B53AN

7B53A

CALI

Introduction

To ensure instrument accuracy, check the calibration

the

7B53A/7B53AN

every six months if used infrequently. Before complete calibration, thoroughly clean and inspect this instrument as outlined in the Maintenance section.

Tektronix Field Service

Tektonix, Inc., provides complete instr~iment repair and recalibration service at local Field Service Centers and the Factory Service Center. Contact your local

ektronix Field Office or representative for further infor-

matton.

Using

facilitate checking or adjusting the are:

Adjustment procedure.

making internal adjsutments by performing only Part ment against the tolerances listed in the Performance driver adjustments accessible from the outside of the

instrument are adjusted as part of the Performance Check the step in Part It--Adjustment, which will return the

instrurnent to correct calibration. In most cases, the adjustment step can be performed without changing control settings or equipment connections.

This

Procedure

General.

Index.

Check or Adjustment procedure, an index is given preceding Part

Performance Check.

ment can be checked without removing the covers or Preformance Check. This prcoedure checks the instruRequirement column of the Specification Section. Screw-

procedure. In addition, a cross-reference is provided to

This section provides several features to

'To aid in locating a step in the Performance

every

looO

hours

operation'

7B53N7B53AN. These

Performance Check and Part I

The performance

this i nstru-

BRAT

I---.

I--

Adjustment Procedure.

correct calibration with the minimum number of steps, perform

procedure gives the recommended calibration procedure for all circuits in this instrument. Procedures are not given for checks that can be made without removing the covers;

see Part I---Performance Check for the procedure for these checks.

often desirable after replacing components, or to improve the adjustment of a portion of the instrument between

major recalibrations. To check or adjust

instrument, set the controls as given under Preliminary

Control Settings and start with the nearest Equipment

Required list preceding the desired portion. To prevent

unnecessary recalibration of other parts of the instrument,

readjust only if the tolerance given in the CHECK----part of the step is not met.

check the calibration of any steps listed in the

INTERACTION--- part of the step.

pletely check and adjust all parts of this instrument,

perform both Part

adjusting the trigger system as given in the adjustment

procedure and follow this with the the same portion

method ensures that the instrument is both correctly

adjusted and performing within all given specifications.

only

Part - -Adjustment,

Partial Procedure.

Complete Performance Check/Adjustment.

and

(e.g., Trigger System Check). This

All waveforms shown in this section were taken with

TEKTRONIX Oscilloscope Camera System, unless

a noted otherwise,

'To return this instrument to

Adjustment

A partial check or adjustment is

only part of the

If re-adjustment is necessary, also

TO com-

11.

Start the complete procedure by

Performancecheck for

NOTE

Before proceeding with installation it is necessary to check the settings of the Variable Selector multi-pin connector pin connector (P613). The Variable Selector multi-pin connector VARIABLE control varies main sweep rates, delayed sweep rates, or main sweep Gate Out multi-pin connector the Delayed Sweep Gate Out signal is connected to the front-panel DLY'D to General Operating Instructions in this section for VARIABLE control and DLY'D

REV A JUN

(P140) and the Delayed Sweep Gate Out rnulti-

(P140) determines whether the front-panel

holdoff; the Delayed Sweep

(P613) determines whether

TRIG IN connector (see Fig. 4-1). Refer

GAI'E

OUT

information.

1980

TEST

General

The following test equipment and accessories, or its equivalent, is required for complete calibration of the 7B53A/7B53AN. Specifications given for the test equipment are the minimum necessary for accuratecalibration. Therefore, some of the specifications listed here may be less precise than the actual performance capabilities of

the test equipment.

correctly calibrated and operating within the listed specifications.

EQUIPMENT

All

test equipment is assumed to be

REQUIRED

4- 1

7B53A

ng,

4-1.

R,o~ation

Delayed

Gate

Oul

and

V@rbaWe

SecrXeelor

mull!-plru

ConneClOts.

REV

&AN

1985

The Performance Check and Adjustment procedures

7B53A

are based on this recommended equipment. If other equipment is substituted, control settings or calibration setup may need to be altered to meet the requirements of the equipment used. Detailed operating instructions for the test equipment are not given the instruction manual for the test equipment if more information is needed.

Special Calibration Fixtures

Special Tektronix calibration fixtures are used in this procedure only where they facilitate instrument calibration. These special calibration fixtures are available from Tektronix, Inc. Order by part number through your local Tektronix Field Office or representative.

inthis procedure. Referto

Table

TEST EQUIPMENT

Calibration Equipment Alternatives

All of the listed test equipment, or equivalent, is

required to completely check and adjust this instrument.

The procedures are based on the first item of equipment given as an example of applicable equipment. When other

equipment is substituted, control settings or setup might

need to be altered to meet the requirements. If the exact item given as an example in the Test Equipment list is not available, first check the specification columntoseeif any other equipment might suffice. Then check the Usage column to see what or adjustment that is of little or no importance to your

measurement requirements, the item and corresponding step(s) can be deleted. For example, if only a Performance

Check is to be performed, the square-wave generator can

be omitted.

4-1

thisitem is usedfor. If usedfor acheck

.--A

Description

Oscilloscope 7000-series oscilloscope

2. Amplifier Unit

4. Low-frequency slne-wave generator

5. Square-wave generator

---"

Minimum

mainframe. Bandwidth cap-

ability of 100 MHz re-

quired.

Specifications

7A-series amplifier unit.

Combined bandwidth of amplifier unit and oscilloscope, 100

Frequency range, 50 kHz

10 MHz to 100 MHz; out.

and

put amplitude, variable from 15 to 500 50

Frequency range, variable from 30 Hz to

put amplitude, variable from 30 500 and to30V into

Mn.

Amplitude, 500 mV into 50 repetition rate, 1 kHz; risetime, less than 12 ns into 50 n.

MHz.

mV into

MHz; out-

mV to 4 V into

Used throughout procedure

to provide display.

Used throughout procedure to provide vertical input to oscilloscope system.

Internal and external trig-

gering checks. Main and

delayed trigger dc balance adjustments.

Main and delayed triggering checks. Check trigger modes. Check external amplifier gain and

bandwidth.

Main and delayed external trigger input compensation adjustments.

Usage

Examples of Applicable

a. TEKTRONIX 7603 Oscilloscope.

b. Any TEKTRONIX 7000series oscilloscope with

100 MHz bandwidth (com-

bined with amplifier unit)

a. TEKTHONIX Type SG 503 Signal Generator."

b. General Radio Model Oscillator with General Rad~o Type 274

to provide bnc output (can

be used for trigger dc balance

a. TEKTRONIX TYPE

a. PG 506 Generator."

lest Equipment

TEK'FRONIX 7A16A Amplifier.

TEKTRON

ad] ustments only).

504 Generator."

EK TRONI X Type

"-"

7A18A Amplifier.

QBJ

Adapter

----------

13108

REV

JUN

1986

Cali bration-7B53Al7B53AN

7B53A

Table

4-1

(cont)

Description

6. Time-mark generator

10X voltage

7. probe

Cable

. .

...

9. Cable (two required)

10.

PI ug-i n extender Rigid extender for 7000-series

"--

- . -

Minimum Specifications

Marker or sine-wave outputs, from 5 s to 5 ns;

marker accuracy, within

0.1%;

amplitude at least

0.3 V into 50

Compatible with 7A-series

amplifier unit. Combined

risetime of probe, ampli-

fier, and oscilloscope

must be Impedance, 50

RG-58/U; length, 18 in.

connectors, bnc.

Impedance, 50 n; type, RG-58/U, length 42 in.;

connectors, bnc

plug-in units.

less than 3.5 ns.

type,

Sweep timing checks and adjustments. Sweep checks and adjustments.

Check line triggering. External trigger input compensation adjustments. Main and delayed-sweep offset adjustments.

Used throughout procedure for

signal interconnection.

Used throughout procedure for

signal interconnection.

Used throughout adj procedure to provide access

internal adjustments

and test points.

- - -

Usage

delay

ustmenl

---

a. TEKTRONIX Type TG 501 'Time-Mark Generat~r.~

TEK-PRONIX 2901 Time-

Mark Generator.

a. TEKTRONIX

TEKTRONIX P6106A.

a. Tektronix Part No. 01 2-0076-00.

a. Tektronix Part No. 01

2-0057-01.

a. Tektronix Part No. 067-0589-00.

Examples

P6053B Probe.

"--

connector Connectors, bnc External tr~gger checks

---

- -

12 Perm~nat~on throughout procedure

t2%,

connectors, bnc

13. Adapter

Input RC

14. Normalizer

15. Attenuator

16. Screwdriver

17. Low-capacitance

screwdriver

18. VOM

Connectors,

female.

lime constant, one 20 pF; connectors, bnc. pensat ion adjustments.

Impedance, 50

tion; 10X; type, feedthrough;

accuracy,

bnc.

Three-inch shaft; 3/32-inch I Used to adjust variable bit. resistors.

1 1/2-inch shaft.

0-10

volt scale

GR874 to bnc

3~3%; connectors,

terminate

cable w~th bnc connectors Internal and external

gering checks. Main and layed-trigger dc balance

adjustments. External trig-

ger input compensation adjustments.

Mn times External trigger input com-

n; attenua-

External trigger input compensation adjustments.

Used to adjust variable capacitors.

Used for sweep offset and

trigger

50 n coax~al

null adjustment.

trig-

de-

a. Tektronix Part No.

103-0030-00.

a. Tektronix Part No.

1-0049-01.

a. Tektronix Part No. 01 7-0063-00.

.-.

a. Tektronix Calibration

Fixture 067-0538-00.

a. Tektronix Part No. 01 1-0059-02.

a. Xcelite R-3323.

a. Tektronix Part No. 003-0000-00.

TEK'TRONIX Type DM 501A

a. Digital Multimeter."

. - .-

"Requires TM 500-Series Power Module.

~~~__I~~~~.~~.~.~__I~

4-4

"-1"

"...

c. Tr~pplet 630NA.

i..."..

REV

JUN

1986

Preliminary Control Settings

7B53A

Set test equipment and 7353Al7B53AN controls as follows (for both Performance Check and Adjustment procedure):

Position Midrange

AC-DC-GND AC

Polarity

VoltsiDiv

Variable VoltslDiv (CAL-IN)

+-UP

MAlN TRIGGERING

SLOPE MODE COUPLING SOURCE DLY'D TRIG

LEVEL SLOPE COUPLING SOURCE

Cali bration.--7BS3A/7B53AN

(I-.)

AUTO AC INT

RUNS

AFTER

DLY TIME

AC INT

7603 Oscilloscope

Vert Mode Left

Prig

Source Vert Mode

Focus Adjust for well-defined

display

intensity

Graticule

Illurn

Midrange As desired

POSITION MAG TIMVDIV OR

DLY'D

TlME

DLY'D T~mei

Division

VARl ABLE Variable Selector

DELAY

TlME MUL7

Midrange

20 fls

ps (press in for MAlN SWP Display Mode) CAL MAlN

1.00

REV

JUN

1980

Cali bration--7B53A/7B53AN

7B53A

Performance

Check

PART

Introduction

The following procedure checks the performance of the 7B53A/7B53AN without removing the side-covers or making internal adjustments. All tolerances given in this 13. Check Delay-Time Jitter

procedure are based on the Specification section of the

7B53N7853AN Operators Manual. 14. Check Mixed Sweep Operation

INDEX

PART

I-PERFORMANCE

I--PERFORMANCE

12. Check Delay-Time Multiplier Differential

AccU"cy

15. Check Main and Delayed Sweep Variable Control Operation

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

CHECK

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

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

CHECK

16. Check External Amplifier Gain.

Trigger System Check

Page

1. Check Main and Delayed Internal Triggering Operation

2. Check Main and Delayed External Triggering Operation

3. Check Main and Delayed Internal Trigger Jitter 4-9

4. Check Main and Delayed Low-Frequency

Triggering Operation

5. Check Main Triggering AC High-Frequency Reject Operation

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

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

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

4-7

4-8

4-9

4-10

17. Check External Horizontal Bandwidth

Preliminary Procedure for Performance Check

NOTE

The performance of this instrument can be checked

any

temperature within

unfess otherwise stated.

O°C

..........

.....

f-50°C

range

4-16

4-17 4-18

4-18 4-19 4-19

6. Check Main "Triggering AC Low-Frequency Reject Operation

7. Check Main and Delayed Trigger Level and Slope Operation 4-1 1

8. CheckMainTrigger Modes..

9. Check Line Triggering Operation 4-12

Horizontal System Check

10. Check Main and Delayed Sweep Timing Check. Accuracy and Linearity 4-13

11. Check Main and Delayed Sweep Magnifier Accuracy and Linearity

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

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

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

.........

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

4-10

4-11

4-74

1. Install the

ment of the indicator oscilloscope.

vertical compartment.

3. Turn on the oscilloscope and allow at least 20

minutes warmur, before

under Preliminary Control Settings.

7B53A/7B53AN into the right compart-

lnstall the 7A16A Vertical Amplifier unit into the left

~roceedina with the Performance

Set the equipment controls as given in this section

REV

JUN

1980

Cali

7B53A

bration--71EL53A/7B53AN

Performance

Check

TRIGGER

Equipment Required

7603 Oscilloscope

7A16A Amplifier Unit

3 10X probe

Medium-frequency signal generator

5. Low-frequency sine-wave generator

Control Settings

Set the controls as given under Preliminary Control

Settings.

Check Main and Delayed Internal Triggering

Operation

a. Connect the output of the medium-frequency signal generator to the

adapter, 50

7A16A Input with a GR-to-bnc female

coaxial cable, and 50

bnc termination.

SYSTEM

6. GR to bnc female adapter

Bnc T-connector

42-inch

18-inch 50 R coaxial cable with bnc connectors

10.

f. Change the following control settings:

MAlN TRIGGERING

TlMVDlV OR

DLY'D Time/

DLY'D TRlG

CHECK

bnc cable

bnc termination

COUPLING LEVEL

DLY TIME

Division

LEVEL

AC Set for stable main sweep display

~.rs

ps (press in for DLY'D SWP Display Mode) DLY'D SWP TRIGGERABLE

b. Change the folfowing control settings: MAIN TRIGGERING

LEVEL sweep disptay

TlMEiDlV OR

TIME

DLY

DLY'D Time/

Division

c. Set the medium-frequency signal generator for a

0.3-division display at 10 MHz.

d. Change the MAlN TRIGGERING MODE switch to

NORM.

e. CHECK--Stable crt display can be obtained with

the MAlN TRIGGERING COUPLING switch set to AC, AC

LF REJ, and DC for both the positive and negative positions of the (MAIN 'TRIGGERING LEVEL control may be adjusted as the COUPLING necessary to obtain a stable main sweep display, TRIG'D

light on).

MAIN TRIGGERING SLOPE switch

Set for stable main

ps (press in

for MAIN SWP Display Mode)

i.e., AC LF REJ, and DC (MAIN I'RIGGEHING LEVf L control

g. CHECK-- Stable crt display can be obtained with

DLY'D TRlG COUPLING switch set to AC and

the

and - SLOPE (DLY'D TRlG LEVEL control may be adjusted as necessary to obtain a stable displayed sweep display).

h. Change the following control settings:

MAlN 'TRIGGERING

MODE AUTO

TIMEIDIV OR

TIME .05 ps

DLY

DLY'D Time/

Division .05 ps

MAG XI

i. Set the medium-frequency generator for a

d~vision display at 100

Set the MAIN TRIGGERING MODEswitch to NORM.

CHECK---Stable crt display can be obtained wtth

may be adjusted as necessary to obtain a stable display).

DCfor both

1.5-

MHz.

swttch for MAIN TRIGGERING set to AC,

REV

JUN

1980

4-7

Cali bration.-.7BS3MB53AN

7B53A

Performance Check

Change the following control settings:

MAIN TRIGGERING

MODE COUPLING AC

LEVEL

TlMElDlV OR

DLY

TIME

DLY'D Time/

Division DLY'D SWP Display Mode)

m. CHECK-Stable crt display can be obtained

the DLY'D TRIG COUPLING switch set to AC and DCfor

and - SLOPE (DLY'D TRIG LEVEL control may be

the

adjusted as necessary to obtain stable display).

AUTO

Set for a stable main sweep display

.05

ps (press in for

with

e. Disconnect the 50

MAIN TRIG IN connector and connect them to the DLY'D

IN connector.

TRIG

f. Change the following control settings:

MAlN TRIGGERING

SOURCE

COUPLl NG AC

LEVEL Set for stable main

'I'IME/DIV OR

TIME

DLY

DLY'D Time/

Division DLY'D SWP Display Mode)

DLY'D 'TRIG LEVEL

cable and termination from the

sweep display

.05 ps (press in for

RUNS AFTER DLY

TIME

n. Disconnect all test equipment.

Check Main and Delayed External Triggering

Operation

a. Change the following control settings: MAlN TRIGGERING

COUPLING AC SOURCE EXT

DLY'D TRlG

SOURCE EXT COUPLING AC MAG X

TlMWDlV OR

TIME

DLY

DLY'D Time/

Division SWP Display Mode)

b. Connect the medium-frequency signal generator to

7A16A Input with a GR-to-bnc female adapter, 50

the

coaxial cable, and bnc T-connector. Connect the output of

the T-connector to the

connector with a 50 termination.

c. Set the medium-frequency signal generator for a

two-division display (100

7B53N7653AN MAIN TRIG IN

ps (press in for MAIN

coaxial cable and 50

mV) at 10 MHz.

bnc

g. Set the medium-frequency signal generator for a

two-division display (100

h. Rotate the DLY'D

SWP TRIGGERABLE position.

CHECK--Stable crt display can beobtained withthe

DLY'D TRIG COUPLING switch set to ACand DCfor both

-I-

and

the

adjusted as necessary to obtain a stable delayed sweep display).

Disconnect the 50

DLY'D 'TRIG IN connector and connect it to the MAlN

TRlG IN connector.

MAIN TRIGGERING

SOURCE

TIMUDIV OR

DLY

DLY'D Time/

Division

DLY'D TRIG

LEVEL

SLOPE (DLY'D TRIG LEVEL control may be

Change the following control settings:

TIME

mV) at 10 MHz.

'WIG LEVEL control tothe DLY'D

cable and termination from the

7BS3A17B53AN

EXT

ps (press in for

MAIN SWP Display Mode)

RUNS AFTER DLY TlME

d. CHECK--Stable crt display can be obtained with the MAIN LF REJ, and DC for both the TRIGGERING LEVEL control may be adjusted as TRIGGERING LEVEL control for a stable main sweep

necessary

'THIGGERING COUPLING switch set to AC, AC

and

SLOPE (MAIN display (500 mV) at 10 MHz. Rotate the MAlN

obtain a stable display).

Set the 7A16A Volts/Division switch to

the medium-frequency signal generator for afive-division

display.

4-8

REV

V and set

JUN

1980

m. Without changing the output amplitude, increase

7B53A

the output frequency of the generator to 100 MHz.

n. Press and release the MAG switch to

o. CHECK-.-,Stable crt display can be obtained with

the MAlN 'TRIGGERING COUPLING switch set

-1.-

LF REJ, and DC for both the

TRIGGERING LEVEL control may be adjusted as

necessary to obtain a stable display).

p. Disconnect the 50 MAlN TRlG IN connector and connect it to the DLY'D

TRlG IN connector.

cabte and termination from the

and

X10.

toAC, AC

SLOPE (MAIN

CaIibration--TBS3A/7B53AN

b. Change the following control settings:

MAIN TRIGGERING

LEVEL

DLY'D TRlG

SOURCE COUPLING AC LEVEL RUNS AFTER DLY

c. Set the medium-frequency signal generator for a 1.5

division display at 75 MHz.

d. Rotate the DLY'D TRIG LEVEL control to DLY'D

SWP TRIGGERABLE and rotate control for a stable

display.

Performance Check

Set for stable display

(TRIG'D light on)

INT

TIME

q. Change the following control settings: MAlN TRIGGERING

SOURCE INT LEVEL Set for stable display

IIME/DIV OR

DLY TIME

DLY'D Time/ .05 ps (press in for the

Division DLY'D SWP Display Mode)

MAG

r. Set the medium-frequency signal generator for five divisions (500

s. Without changing the amplitude, increase the output frequency to 100 MHz.

t. Change the following control settings:

MAG

DLY'D "rRIG LEVEL DLY'D SWP

u. CHECK--Stable crt display can be obtained with the DLY'D TRIG COUPLING switch set to AC and both the be adjusted as necessary to obtain astabledelayed sweep display).

v. Disconnect all test equipment.

Check Main and Delayed Internal Trigger Jitter

a. Connect the medium-frequency signal generator to the

7A16A lnput with a GR-to-bnc female adapter, 50 Q

coaxial cable, and a 50 Q bnc termination.

mV) at 10 MHz.

-6

and --SLOPE (DLY'D TRIG LEVEL control may

,us

X10

TRIGGERABLE

DCfor

CHECK--crt display for no more than

ns) of jitter. Disregard any slow drift.

f. Change the following control settings: TIME/DIV OR

DLY

TIME .05 ,us

DLY'D 'Time/ .05 ps (press in for

Division

MAlN TRIGGERING

LEVEL Set for stable display

CHECK--crt display for lessthan 0.2 division (1 ns)

of jitter. Disregard any slow drift.

Disconnect all test equipment.

Check Main and Delayed Low-Frequency

MAIN SWP Display Mode)

0.2

division

Triggering Operation

a. Connect the low-frequency sine-wave generator to

the

7A16A lnput with a 50

connector. Connect the output of the bnc T-connector to

the MAIN

a 50

b. Change the following control settings: TIMVDIV OR

DLY'D

MAG

c. Set the low-frequency sine-wave generator for

division display at 30 Hz.

TRIG IN connector with a 50Q coaxial cable and

bnc termination.

DLY TIME 10 ms

Time/

Division

coaxial cable and bnc

10 ms (press in for MAIN SWP Display Mode)

T-

a0.3-

REV

JUN

1980

Cali bration-f

7B53A

B53A17BS3AN

Performance Check

d. CHECK--Stable crt display can be obtained with the MAlN TRIGGERING COUPLING switch set to AC, HF REJ, and DC for both the TRlGGERlNG LEVEL control may be adjusted as necessary to obtain a stable display).

e. Change the following control settings:

MAIN TRIGGERING

COUPLING AC LEVEL

TIME/DIV OR

DLY TIME 10 ms

DLY'D Time/

Division SWP Display Mode)

DLY'D TRIG

LEVEL DLY'D SWPTRIGGERABLE

f. CHECK-Stable display can be obtained with the

DLY'D 'TRIG COUPLING switch set to

and SLOPE (DLY'D TRIG LEVEL control may be

the adjusted as necessary to obtain a stable delayed sweep display).

Change the following control settings:

MAlN TRIGGERING

MODE SOURCE EX"P

TlMVDlV OR

TIME 10 ms

DLY

Time/

DLY'D

Division SWP Display Mode)

TRlG

DLY'D

SOURCE

-t

and

Set for stable main sweep display

ms (press in for DLY'D

AUTO

10 ms (press in for MAIN

EX7

SLOPE (MAIN

ACand DCfor both

Disconnect the 50 0 cable and termination from the

TRIG IN connector and place it on the DLY'D TRIG

MAlN IN connector.

I. CHECK--- Stable crt display can be obtained with the

DLY'D

TRIG COUPLING switch set to ACand DCfor both

the

and SLOPE (DLY'D TRIG LEVEL control may be

adjusted as necessary for a stable display).

Check Main Triggering AC High-Frequency

Reject Operation

a. Change the following control settings: MAlN TRIGGERING

MODE AUTO COUPLING AC

TIME/DIV OR

TIME

DLY

DLY'D Time/

Division SWP Display Mode)

b. Set the low-frequency sine-wave generator for a

0.3-division display at TRIGGERING MODE switch to NORM.

c. CHECK--Stable crt display can be obtained with

the MAlN TRIGGERING LEVEL control.

d. Without changing theoutput amplitude, set

frequency sine-wave generator to 1 MHz.

e. Press and release MAG switch to

kHz; then return the MAlN

HF REJ

,us

'us (press in for MAIN

XI0 position.

thelow-

h. Set the low-frequency sine-wave generator for a one-division display (100 MAIN TRIGGERING MODE switch to NORM.

CHECK-Stable crt display can beobtained withthe MAlN TRIGGERING COUPLING switch set to AC, AC HF REJ, and DC for both the + and - SLOPE (MAIN a. Change the following control settings: TRIGGERING LEVEL control may be adjusted as necessary to obtain a stable display).

Change the following control settings:

MAIN TRIGGERING

COUPLING AC SOURCE LEVEL Set for stable display

TIME/DIV OR

TlME

DLY

DLY'D Time/

Division

mV) at 30 Hz; then return the

10 ms

ms (press in for DLY'D

SWP Display Mode)

CHECK--Stable crt display cannot be obtained at

any setting of the

Check Main Triggering AC Low-Frequency

MAIN TRIGGERING LEVEL control.

Reject Operation

MAlN TRIGGERING

MODE

COUPLING AC LF REJ

MAG X 1

b, Set the low-frequency sine-wave generator for a

0.3-division display at 30 TRIGGERING MODE switch to NORM.

c. CHECK-Stable crt display can be obtained with

the

MAIN TRIGGERING LEVEL control.

AUTO

kHz;

then return the MAlN

REV

JUN

1980

d. Without changing the output amplitude, set the low-

7B53A

frequency sine-wave generator to 60 Hz.

calibration-7853N7B53AN

Performance Check

waveform (indicates DLY'D TRlG LEVEL control range at least

and -1.5 Vf. Check that nodisplayexistswhenthe

LEVE L control is rotated to either extreme.

e. Set the

1-IMWDIV OR DLY TIME and DLY'D

Time/Division switches to 2 ms (MAIN SWP Display

Mode).

f. CHECK-Stable crt display cannot be obtained at

any setting of the MAIN TRIGGERING LEVEL control.

Check Main and Delayed Trigger Level and

Slope Operation

a. Change the following control settings:

7A16A

Volts/Div

7B53A/7B53AN

MAlN TRIGGERING

MODE AUTO

COUPLING DC

TlMWDlV OR

TIME

DLY

DLY'D Time/

Division SWP Display Mode)

DLY'D TRIG

LEVEL- RUNS AFTER DLY

ms (press in for DLY'D

TIME

Change the following control settings:

MAlN TRIGGERING

MODE NORM SOURCE EXT

TlMVDlV OR

TIME

DLY

DLY'D Time/

ms (press in for MAIN

Division SWP Display Mode)

Disconnect the cable from the DLY'D TRlG IN

connector and connect it

CHECK--.Rotate the MA1 N TRIGGERING LEVEL

tothe MAlN TRlG IN connector.

control and check that all levels can be selected as the

-7-

and

main sweep trigger point for both the (indicates MAIN TRIGGERING

and -1.5 V). Check that no display exists when the

least

LEVEL control range of at

SLOPE

LEVEL control is rotated to either extreme.

k. Change the following control settings:

7A16A

Volts/Div

b. Remove the 50

termination from the 7B53N7B53AN DLY'D TRlG IN connector; then reconnect the cable.

c. Set the low-frequency sine-wave generator for the

three-divisions of

d. Rotate the DLY'D

kHz signal.

TRIG L EVEL control tothe DLY'B

SWP I'RIGGERABLE position.

CHECK.- ~~t~t~ the

DLYD

TRIG

LEVEL

control throughout its range and check that display can be tr~ggered at any point along the positive slope of the

waveform. Check that no display exists when the LEVEL

control

g. CHECK

rotated to either extreme.

Set the DLY'D TRIG SLOPE switch to

-Rotate the DLY'D TRIG LEVEL control

throughout its range and check that display can be tr~ggered at any point along the negative slope of the

TRIGGERING

MAlN

SOURCE

EXT

I. Set the low-frequency sine-wave generator for six-

divisions of

m. CHECK-Rotate the

kHz signal.

MAIN TRIGGERING L.EVEL.

control and check that all levels can be selected as the

main sweep trigger point for both the

and SLOPE (indicates MAlN TRIGGERING LEVEL control range of at least I and

LEVEL

V). Check that no display exists when the

either

extreme.

n. Disconnect all test equipment.

Check Main Trigger Modes

a. Set the following control settings:

7A16A

Volts/div 1 V

REV A

JUN

1980

Cali bration--7B53Al7BS3AN

7B53A

Performance Check

7B53N7B53AN

MAlN TRIGGERING

MODE AUTO COUPLING AC SOURCE I NT

TlMWDlV OR

DLY TIME 20

DLY'D Time/

Division MAIN SWP Display Mode)

20 ps (press in for

m. Press the MAlN TRIGGERING RESET button.

n. CHECK-Crt for one sweep as RESET button is pressed (Intensity control on the indicator oscilloscope may need to be varied in order that a single sweep display can be observed).

o. Remove the signal from the

the RESET button.

7A16A Input, then press

b. Connect the low-frequency sine-wave generator to

the

7A16A Input with a 50

termination.

c. Set the low-frequency sine-wave generator for a

four-division display at 50 kHz.

d. Rotate the MAlN TRIGGERING LEVEL control fora

free-running display.

e. Set the MAlN TRIGGERING MODE switch to

NORM.

CHECK--Crt for no display.

Set the MODE switch to AUTO. Rotate the MAlN

TRIGGERING LEVEL control so that the display is just triggered.

h. Set the MAlN TRIGGERING MODE switch

NORM.

coaxial cable and 50

bnc

CHECK--Crt for no display and READY light on

q. Reconnect the signal to the

CHECK---That one sweep occurs as the signal is applied to the the completion of that sweep.

s. Disconnect all test equipment.

Check Line Triggering Operation

a. Connect the 10X probe to the 7A16A Input.

b. Change the following control settings:

7A16A and that the READY light is out after

7A16A input.

i. CHECK---Crt for triggered display.

Set the low-frequency sine-wave generator for a

four-division display at 500 Hz.

k. Change the following control settings: TIME/DIV OR

DLY TIME

DLY'D

MAlN TRIGGERING

Time/

Division SWP Display Mode)

LEVEL

MODE SINGLE SWP

I. CHECK-Crt for no display.

rns (press in for MAIN

Set for a stable display

(IRIG'D light on)

4-12

7B53A/7B53AN

MAlN TRIGGERING

SOURCE MODE NORM

IIME/DIV OR

DLY

TIME 5 ms

DLY'D Time/

Division MAIN SWP Display Mode)

c. Connect the

source which is connected to the oscilloscope.

d. CHECK-.--For a stable crt display that istriggered on

the correct slope.

e. Disconnect all test equipment

XI0

probe tip to the same line-voltage

LINE

5 ms (press in for

REV

JUN

1980

7B53A

Equipment Required

7603 Oscilloscope

7A16A Amplifier Unit 5. 42-inch 50 R cable

Time-mark generator 6. 50 Q bnc termination

---..-."-----,.-.---------.-.--..--a"

HORIZONTAL

.,----------

Cali

SYSTEM

"--"

4. Low-frequency sine-wave generator

CHECK

bration-

Perfmmance

9B153A17B53AN

Check

-7

Control Settings

Set the controls as given under Preliminary Control

Settings.

NOTE

The tolerances given ambient temperature range of outside this range, see Specifications in Section

10.

Check Main and Delayed Sweep Timing

steps

and

+15'C

are for an

-1-35°C.

Accuracy and Linearity

a. Connect the marker output of the time-mark

generator to the and 50

b. Change the following control settings:

MAIN TRIGGERING

MODE NORM

LEVEL Set for stable display

7A16A Input with the 50 R coaxial cable

bnc termination.

(TRIG'D tight on)

Table

4-2

MAlN

SWEEP

Main sweep timing must be checked when operating

the

MAlN

.5 rns

rns

SWP or

INTEN

TIMING

NOTE

Display Modes.

c. CHECK-Using the

settings and the time-mark generator settings given in Table 4-2, that the main sweep timing over the middle eight graticule divisions is within the tolerances in Table

4-2.

d. CHECK--Using the time-mark generator settings and the sion switch settings given in Table sweep timing over the middle eight graticule divisions is within the tolerances in Table 4-3.

REV

TIMUDIV OR DLY TIME and DLY'D Time/Divi-

JUN

1980

TIMUDIVOR

4-3,

DLY

TIMEswitch

that the delayed

division

Calibration.-TB53N7B53AN

7B53A

Performance Check

Table

4-3

Position the third marker to the third vertical line.

DELAYED

Delayed sweep timing must be checked when operating in

TIME/IDIV / Time/ Display Tolerance

DLYTIME (pressin) Markers division) SWP

~--."

-",.--.--.-..---

the

Division

SWEEP TIMING

NOTE

DLY'D

SWP

Time

....

-..-

Display Mode.

/markerdI DLY'D

j. CHECK----Fifth marker within 0.12 division of

vertical line.

k. Continue this check for each two-division portion of

the sweep that is within the center eight division

graticule.

I. Set the Time/Division switches to 1 ms (MAIN SWP Display Mode).

m. CHECK Repeat sweep linearity check given in steps g through k. Check for main sweep linearity within

0.1 division

n. Calibration--See step 4 of adjustment procedure.

11.

Check Main and Delayed

Accuracy and Linearity

a. Change the following control settings:

TIMWDIV OR DLY

(5%).

TIME

Sweep

thefifth

and DLY'D

Magnifier

the

e. Set the time-mark generator for 1 ms markers.

Change the following control settings:

TIMEIDIV OR

DLY TIME 2 ms

DLY'D Time/

Division DLY'D SWP Display Mode)

g. Position the second marker to the second graticule

line.

CHECK--Fourth marker within 0.12division

the fourth vertical line.

ms (press in for

(6%)

MAG

POSITION Centered

Check"--Using the TlMVDlV OR DLT TIME switch

and the time-mark generator settings given in "fable

the main sweep magnified timing, excluding the first ten

divisions and the last ten division of the total magnified display.

Rotate the MAIN TRIGGERING LEVEL control for a stable display. Using the settings, DLY'D generator settings given in Table sweep magnified timing, excluding the first ten divisions and the last ten divisions of the total magnified display.

d. Change the following control settings: .T'IME/DIV

DLY "TIME 2 ms

DLY'D

e. Set the time-mark generator for 0.1 ms markers.

Time/

Division DLY'D SWP Display Mode)

Time/Division settings, and time-mark

XI0

'TIMEIDIV

4-5,

check the delayed

ms (press in for

DLY TIME

4-4,

REV

JUN

1986

Table

7B53A

4-4

Cali bration--7B53A/7B53AN

Table

4-5

Performance Check

MAlN SWEEP MAGNIFIER ACCURACY

NOTE

Main sweep magnifier accuracy must be checked

MAlN

SWP

when operating in the

Modes.

10 ,s

ms division

or INTEN Display

:t0.2

DELAYED SWEEP MAGNIFIER ACCURACY

NOTE

Delayed sweep magnifier accuracy must be checked

when operating

DLY'D

the DLY'D

SWP

Display Mode.

CRT Displa

_!..Z

Position the second displayed marker to the second

vertical line of the graticule.

g. CHECK-Fourth displayed marker is within 0.12

division

vertical line.

sion of the fifth vertical line.

REV

(6%)

h. Position the third displayed marker to the third

CHECK--.Fifth displayed marker is within 0.12 divi-

JUN

of the fourth vertical line.

1980

s 1

A,,-...

division

Continue this check for each two-division portion of the total displayed sweep within the center eight divisions of the graticule.

k. Change the following control settings: TIME/DIV OR

DLY

TIME 1 ms

DLY'D

given in linearity within 0.1 division

Time/

Division

CtlECK---Repeat magnified sweep linearity check

stepsf through

ms (press in for

MAIN

SWP

Display Mode)

Checkfor magnified main sweep

(5%).

Cali bration-.-7853A/7853AN

7B53A

Performance Check

12.

Check Delay

Time

Multiplier Differential

Accuracy

a. Set the time-mark generator for 1 ms markers.

b. Change the following control settings: MAG

TlMWDlV OR

DLY TIME 1 ms

DLY'D Time/ 10

Division DLY'D SWP Display Mode)

MAIN TRIGGERING

LEVEL Set for stable display

DLY'D

TRIG

ps (press in for

RUNS AFTER DLY TIME

Second time-marker positioned to graticule center for reference.

NOTE

The following steps check delay time multiplier accuracy. Two factors must be determined: the maximum error allowable to be within the specification, and the actual error of the measurement.

c. Rotate the DELAY TlME MULT dial to 1.00. If

necessary, further rotatethe dial to

placea 1 msmarkeron

the crt. To provide a reference point, position the 1 ms

marker to graticule center with the

7B53N7B53AN POSITION control (see Fig. 4-2). Note the exact DELAY TlME MULT dial setting.

d. Rotate the DELAY

points from the dial setting noted in part c

TIMEMULTdial tomajor division

(e.g., if the DELAY TlME MULT noted in part cis 0.90, major division points will be 1.90, 2.90, 3.90 through 8.90). Check and record the position of each time-marker (with respect to

the reference point established at graticule center) at each

major division over the center eight division. See Fig. 4-2

for error measurement and Fig. 4-3 for typical delay time

error figures.

NOTE

With the delayed sweep rate

le.g. VIMEIDIV or DLY Timeldivision switch at 10 cule division represents 1% error.

11100 of the main sweep rate

TlME

j~s), each major horizontal grati-

ime-marker showing

-0.2%

error.

Ti me-marker showing

switch at 1 ms; DLY'D

e. CHECK--Scan the figures recorded in step d for all difference readings over the center eight divisions (see Fig. 4-3). Find the maximum error over any one division measurement. Check that it is within the allowable error (see Fig.

4-4).

Example. Refer to the curve in Fig. 4-4for the 0.5 s/div

to 1 psldiv delay time range. For any one-division

measurement the allowable error is

3.7%. At the same delay time range, for any five-division measurement the allowable error is 1.3%.

f. CHECK---.-Scan the figures recorded in step d for

difference readings over the center eight divisions of

Fig.

4-2.

Typical delay

time

error measurement.

display (see Fig. 4-3). Find the maximum error over any two division measurement, divide by two, and checkthat it is within the allowable error given in Fig.

4-4.

REV A JUN

1980

Typical

7B53A

DELAY

MULT Dial Setting Typical Recorded

(divl%)

Error

-.---

--.--

Determining Maximum

One-Division Error

TIME

.-.--.

---.-

Measurement

Cali bration--.7B53Al7853AN

Performance

Check

---

Percentage figures apply only when delayed sweep rate

Percentage figures apply only when delayed sweep

Fig.

4-3.

Typical Delay Time

NOTE

Error

measurement, divide allowable error given in Fig.

h. CHECK- Scan the figures recorded in step d for

difference readings over the center eight divisions (see

Fig.

measurement, divide by eight, and check that it

allowable error given in Fig. 4-4.

the

0.175%

If100

the main sweep rate.

rate

Ill00

of the main sweep rate.

figures.

tour, andcheckthat

4-4.

4-3). Find the maximum error over an eight-division

Set the time-mark generator for

iswithinthe

ps markers.

within

Fig.

4-4.

Allowable Delay Time

CHECK--Scan the figures recorded

difference readinas over the center eiaht divisions (see

4-3). Find thgmaximum error overWany four division

Fig.

REV

JUN

1980

Error.

step

for

Change the foflowing control settings:

'1'IMWDIV OR

DLY

TIME

DLY'D

MAIN

lime/

Division SWP Display Mode)

TRIGGERING

LEVEL Set for stable display

Repeat steps c through h.

Check

Set the time-mark generator for

Jitter

10 ps

ps (press in for DLY'D

markers.

4-17

Cali bration--7B53Al7BS3AN

7B53A

Performance Check

b. Change the following control settings: DELAY TIME

TIME/DIV OR

DLY

DLY'D Time/

Division

VARIABLE CAL

c. Position the pulse near the center of the crt display

area with the DELAY TIME MULT dial.

d. CHECK--.-Jitter in the leading edge of the pulse should not exceed one graticule division (one part in 20,000).

adjust so the pulse is displayed near the center of the crt display area.

should not exceed one graticule division.

Disregard any slow drift.

I-urn the DELAY TlME MULT dial to about

f. CHECK---Jitter on the leading edge of the pulse

MULT

I"IME

.OO

ps (press in for DLY'D

SWP Display Mode)

9.00

and

f. Set the time-mark generator for

g. CHECK-.-Timing over center eight divisions is

0.16

within

15.

division (2%). Position as necessary.

Check Main and Delayed Sweep Variable

0.5

ms markers.

Control Operation

a. Set the time-mark generator for

b. Change the following control settings:

TlMVDlV OR

DLY

TIME

DLY'D Time/

Division SWP Display Mode)

MAlN TRIGGERING

LEVEL Set for stable display

c. Position the markers to the far left and right

graticule lines with the POSITION control.

Turn the VARlABLEcontrol fully counterclockwise.

ms markers.

ms ms (press in for MAIN

14.

Check Mixed Sweep Operation

a. Change the following control settings: TIMVDIV

DLY TIME

DLY'D

Division SWP Display Mode) DELAY MAlN TRIGGERING

LEVEL Set for stable display

b. CHECK---"Timing over center eight graticule

divisions. Note the error for part d.

c. Change the following settings:

-TIME/DIV OR

DLY

DLY'D Time/

Division SWP Display Mode)

VARIABLE Pull out for MIXED

d. CHECK--.Timing over center eight graticule divisions is within error noted in part b.

'rime/

TIME MULT

TIME

0.16

ms (press in for MAIN

1 0.00

ms (press in for DLY'D

Display Mode

division (2%) plus the main sweep

e. CHECK-Crt display for equal to or less than four division spacing between markers (indicates adequate range for continuously variable sweep rates between calibrated steps).

f. Change the following control settings:

TIME/DIV OR

DLY

TIME

DLY'D Time/

Division SWP Display Mode)

Variable Selector

(Internal) Delayed Variable

VARIABLE CAL

g. Position the markers to the far left and right

graticule lines with the POSITION control.

h. Rotate the VARIABLE control fully counter-

clockwise.

CHECK--Crt display for equal to or less than four

i. division spacing between markers (indicates adequate range for continuously variable delayed sweep rates between calibrated steps).

ms (press in for DLY'D

e. Set the DELAY

TIME

MULT' dial to

0.00.

j. Disconnect all test equipment.

REV F JAN

1981

Cali

7B53A

bration.--.9B53A/7553AN

Performance

17.

16.

Check External Amplifier Gain

a. Change the following control settings:

AC-DC-GND

Volts/Div

'TB53AL7B53AN

MAlN TRIGGERING

MODE AUTO

SOURCE EXT c. Without changing the amplitude, increase the

TIMElDIV OR

DLY TIME 10

T~me/

DLY'D

Division

MAG

Connect the low-frequency sine-wave generator to e. Change the MAIN TRIGGERING COUPLING

7A16A Input with a 50 0 coaxial cable and 50 0 bnc

the termination.

ps lops (press in for MAIN SWP Display Mode) X1

Check External Horizontal Bandwidth

a. Change the following control settings: MAlN TRIGGERING

COUPLING AC SOURCE MAG

Set the sine-wave generator to 1 kHz and adjust the

amplitude for a horizontal trace length of eight divisions.

quency of the sine-wave generator until the horizontal

trace length decreases to 5.6 divisions.

d. CHECK-Sine-wave generator frequency must be

MHz or greater (upper ----3 dB point).

switch to

AC LF

REJ.

Repeat parts b, c, and d,

EX7

Check

fre-

c. Set the generator for a four-division display to

(800 mV) at 100 kHz.

d. Disconnect the sine-wave generator from the 7A16A and connect it to the 7B53Ai7B53AN MAlN TRIG IN OR AMPL connector.

e. Change the AMPL. Rotate the POSITION control to center the display on the graticule.

CHECK--Crt horizontal trace length must be eight

divisions t 0.8 division.

g. Press the EXT

TRIGGERING SOURCE switch.

CHECK.--Crt horizontal trace length must be 0.8

divisions with i 0.08 division.

Set the MAG switch

control to center the display on the graticule.

CHECK---Crt horizontal trace length must be eight

divisions t0.8 division.

TIMWDIV OR DLY TIME switch to

10 button of the MAIN

X10. Rotate the POSITION

f. Change the MAlN TRIGGERING COUPLING switch

DC.

Repeat parts

g. Change the MAlN TRIGGERING COUPLING

switch to AC

h. CHECK--Sine-wave generator frequency must be

100 kHz or less (upper --3 dB point).

"l'his completes the Performance Check procedure for

the

7B53A/7B53AN,

tolerances given in this procedure, it is correctly calibrated and within the specified tolerances. Disconnect all test equipment.

This procedure does not check the Delayed Sweep

Gate output signal as applied to the front panel Dly'd

Trig

slde cover and changing an infernal connection.

This step is included in the

srnce the s~de covers are already removed. If it 1s

desired to check this step as part of the Performance Check refer to step

connector, since this requires removal of one

and

REJ. Repeat parts b and c.

the

NOPE

Adlustment procedure

of the Adjustment procedure.

has

met

all

REV

JAN

1981

Calibration-~--7BS3A/7B53AN

7B53A

Adjustment

Introduction

'The following procedure returns the 7B53A17B53AN to correct procedure are calibration guides, and should not be interpreted as instrument specifications except as listed in

the Performance Requirement column of the

Specifications. The actual operation of the instrument may exceed the given limits ortolerances if the instrument meets the Performance Requirements as checked in Part I---Performance Check of this section.

calibration. All limits and tolerances given in this

INDEX

PART

II-ADJUSTMENT

Trigger System Adjustment

Page

Adjust Trigger DC Balance and Main Trigger

Level Centering

2. Adjust Delayed Trigger Level Centering

Adjust Main EXTernal : 10 Compensation (C16)

B210000

4. Adjust Main and Delayed External Compensation BELOW

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

(R72, R333)

7B53A Only

(C401, C301, C16)

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

(R435) 4-22

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

8209999

4-21

4-22

Horizontal System Adjustment

Adjust Main and Delayed Sweep Offset (R592,

R675)

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

4-24

8. Adjust Main and Delayed Sweep Length (R564, R652) 4-25

9. Adjust Delayed Sweep Start and Delayed Sweep

Stop (R576, R572)

Frequency Timing

,,,

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

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

Adjust

Main

Check

and Delayed

Delayed

(C594, C691)

Sweep

High-

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

Gate

Output

........

Preliminary Procedure for Adjustment

Install the Vertical Amplifier unit directly into

vertical compartment

Install the 067-0589-00 plug-in extender into the

horizontal compartment.

3. Remove the side covers from the

and connect the instrument to the plug-in extender.

4. Turn on the oscilloscope and allow at least 20

minutes

under Preliminary Control Settings.

warmup before proceeding with adjustments.

5. Set the equipment controls as given in this section

the oscilloscope.

7B53A/7B53AN

the

4-25

4-26

left

6. Adjust SWP CAL (front-panel)

Adjust Magnified Sweep Gain (R762)

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

.......

4-24

4-24 for appropriate test po~nt

Refer to Figs. 8-23.24, and 25, adjustment Iocat~ons,

(TP)

locat~ons

REV

JUL

1986

Cali

7B53A

bration-TB53N7B53AN

Adjustment

TRIGGER

SYSTEM

Equipment Required

1. 7603 Oscilloscope

7A16A Amplifier

10X Probe

4. Medium-frequency signal generator

5. Square-wave generator

6. Plug-in extender

Control Settings

Set the controls as given under Preliminary Control

Settings.

NOTE

ADJUSTMENT

42-inch 50 Q coaxial cable

18-inch 50 R coaxial cable

50 Q bnc termination

10. GR to bnc female adapter

11. 50

XlO attenuator

12. Input RC Normalizer; RC 1

13. VOM

e. Set the MAIN TRIGGERING LEVEL control to (0).

CHECK--Crt for sweeptrigger point (start of sweep)

at the electrical center.

MQ X 20 pF

See

Ftgs.

8-23,

24,

and

(located on puff-out page

rear of

system adjustments and test points.

Adjust Trigger DC Balance and Main Trigger

Level Centering

a. To establish electrical center, set the coupling switch to GND. Connect aVOM across TP50and TP59 on the 7B53A17853AN. Rotate the 7A16A position control for a

Do not move the of this step has been complefed.

Set the 7A16A input coupling to DC and the

7653N7B53AN MAlN TRIGGERING COUPLING switch

to DC.

c. Connect the medium-frequency signal generator to

the 7A16A Input with a GR-to-bnc female adapter, 50 Q

coaxial cable, and 50 R bnc termination.

diagrams

section] for location of trigger

(R72, R333)

0 V reading on the VOM.

NOTE

7A16A

position control until

7A16A input

part

g. ADJUST---R72, Trigger DC Balance, for sweep

trigger point at crt electrical center.

h. Change the MAIN TRIGGERING SLOPE switch to

and

I-.

Note the positions of the sweeptrigger point with

respect to crt

Change the MAlN TRIGGERING COUPLING switch

to AC.

CHECK--Sweep trigger points occur at crt electrical center or at points equally above and below crt electrical center of the and

k. ADJUST---R333, Main

sweep trigger points equally

trical

center

electrical center.

SLOPE.

for

the

and

Triqger Level Center, for above and below crt elec-

SLOPE,

d. Set the medium-frequency signal generator for a

one-division display at 50 kHz.

REV E JUN

1980

I. INTERACTION--Ropeat the adjustment of Trigger DC Balance, and as necessary.

R333, Main Trigger Level Center,

R72,

4-2

Cali bration-"753MB53AN

7B53A

Adjustment

Adjust Delayed Trigger Level Centering (R435)

a. Change the following control settings: TIME/DIV OR

DLY 'TIME 20

DLY'D Time/ 10 ,us (press in for DLY'D

Division SWP Display Mode)

DLY'D

b. Rotate the DLY'D 'TRIG LEVEL control for a stable

display with

c. Change the DLY'D TRlG SLOPE switch to Note the positions of the sweep trigger point with respect to crt electrical center.

d. ADJUST-R435 for sweep trigger points to occur at crt electrical center or at points equally above and below crt

TRIG LEVEL RUNS AFTER DLY TIME

thesweep trigger point at crt electrical center.

electr~cal center

for

the and I DLY'D TRlG SLOPE.

and

-1

Change the following control settings:

VoItsiDiv COUPLING

ADJUST--EXT

best square corner on leading edge of waveform (ignore

first 2 ps).

h. Disconnect all test equipment.

":-

10 lnput Compensation C16 for

Adjust Main and Delayed External Compen-

sation

the axial cable,

(C401, C301, C16)

a. Connect the output of the square-wave generator to

7A16A

lnput with a GR-to-bnc female adapter,

10X

attenuator,

lnput RC Normalizer.

B209999 & Below

termination and

co-

e. Disconnect all test equipment.

3. Adjust Main EXTernal + 10 Compensation (C16)

8210000 & Up 9B53A Only

a. Connect the output of the7A16A Input with a20 pFX 1 Ma Input RC Normalizer.

b. Change the following control settings:

Volts/Div

COUPLING

7B53A17B53AN

MAlN TRIGGERING

LEVEL Set for stable display COUPLING MAG TIME/DIV SOURCE

c. Set the square-wave generator for a five-division

display at 1

d. Disconnect the RC Normalizer from the 7A16A

lnput and connect it to the MAlN TRlG IN connector.

e. Connect the

from the

kHz.

10X probe (properly compensated)

7A16A input to TP315.

the square-wave

DC XI .2

EXT + 10

generatorto

b. Change the following control settings:

7A16A

VoltsiDiv .1 V

7B53&/7B53AN

MAlN TRIGGERING

LEVEL. Set for stable display COUPLING DC

MAG TIME/DIV OR

TIME 1 ms

DLY

DLY'D Time/ .5 ms (pull out for

Division

DLY'D

c. Set the square-wave generator for a five-division

display at

d. Disconnect the RC Normalizer from the 7A16A

lnput and connect it to the DLY'D TRIG IN connector.

e. Connect the 10X probe (properly compensated)

from the

TRIG COUPLING DC SOURCE EXT

kHz.

7A16A lnput to TP415.

Change the following control settings:

7A16A

Volts/Div

INTEN Display Mode)

REV

JUL

1986

MAIN TRIGGERING

7B53A

LEVEL Set for TRIG'D light on

DLY'D

Time/ Press in for DLY'D SWP

Division Display Mode

DLY'D TRIG

LEVEL delayed sweep display

ADJUST -.Dly'd Ext Comp adjustment C401 for best

square corner on leading edge of displayed waveform.

h. Disconnect the 10X probe from TP415 and connect it

TP315. Disconnect the RC Nortnali~er from the DLY'D

to "TRIG

connector and connect it to the MAIN "TRIG IN

connector.

i. Change the following control settings:

Set for stable display

Calibration

Adjust Main High Frequency Triggering

a. Change the following control settings:

7A16A

VoltslDiv

MAlN "TRIGGERING

MODE Auto

COUPLING AC

SOURCE MAG XI 0

TlMEfDlV OR

TIME .05 ps

DLY

b. Connect the medium-frequency signal generator to

the 7A16A input,

c. Set the medium-frequency signal generator for 100

MHz and an amplitude for

785314

INI

1.5 divisions of display.

-7B53A17B53AN Adjustment

TIMEIDIV OR

DLY TIME 1 ms

DLY'D

Pimel 1 ms {press in for MAIN

Division SWP Display Mode)

MAlN TRIGGERING

SOURCE EXT LEVEL Adjust for stable main

sweep display

ADJUST- Main Ext Comp adjustment C301 for best

square corner on leading edge of waveform.

Remove the 10X attenuator and connect the 50 termination directly to the Normal~ter. Change the MAIN TRIGGERING SOURCE

ADJUST

square corner on leading edge of waveform.

Ext

sw~tch to EXT : 10. Division SWP Display Mode)

10 Input Compensation C16 for best

d. Set Main Level control to

e. ADJUST

6. Adjust Delayed

a. Change the following control settings:

TlMEiDlV OR

DLY TIME

DLY'D Time1 DLY'D TRIG LEVEL

DLY'D

COUPLING AC SOURCk INT

b. ADJUST-DLY'D

play.

-C323 for a stable display,

High

TRlG

TRlG LEVEL for a tr~ggered dis-

Frequency Triggering

.05 ps (press in for DLY'D

Approx.

necessary.

O'clock position

m. Disconnect all test equipment.

REV

JUL

1986

ADJUST--C423 for a stable display, if necessary.

Cali bration-71353Ai7853AN

7B53A

Adjustment

Equipment Required

1. 7603 Oscilloscope

7A16A Amplifier

HORIZONTAL

SYSTEM

ADJUSTMENT

bnc termination

10X probe

3. Time-mark generator

4. 42-inch

coaxial cable

Control Settings

Set the controls as given under Preliminary Control

Settings.

NOTE

See Frgs.

in rear of system adjustments and test

8-23,

24,

and

(located on pull-out page a. Connect the marker output of the time-mark

d~agrams section) for locatron of

po/nts.

horizontal

7. Adjust Main and Delayed Sweep Offset (W592, R675)

a. Change the following control settings:

7A16A

Volts/Div

7. Plug-in extender

VOM

9. INTERACTION-Check step

h. Disconnect all test equipment.

Adjust SWP CAL (front-panel)

generator to the 7A16A Input with the 50 and 50

bnc termination.

b. Set the time-mark generator for 1 ms markers.

c. Change the following control settings:

7A16A

VoltslDiv .5 V

coaxial cable

TIME/DIV OR

DLY "TIME

DLY'D

Time/

Division SWP Display Mode)

Mode Normal

b. Connect a VOM between

ADJUST-R592, Main Sweep Offset, for 0 V.

d. Change the following control settings: TlMElDlV OR

DLY

TIME

DLY'D Time/

Division SWP Display Mode)

Move the test lead from TP580 to TP690.

f. ADJUST-R675, Delayed Sweep Offset, for 0

ms (press in for MAIN

TP580 and ground.

1 ms (press in for DLY'D

MAIN TRIGGERING Set for stable main

LEVEL sweep display

TIMWDIV

DLY 'TIME

DLY'D Time/

Division SWP Display Mode)

Mode Auto

CHECK--.Crt display for one marker each division between the second and tenth graticule lines (position the display as necessary).

e. ADJUST--Front-panel SWP CAL control

one marker per division. The second and tenth markers

must coincide exactly with their respective graticule lines (reposition the display slightly with the horizontal POSITION control, if necessary).

Adjust Magnified Sweep Gain (R762)

Set the time-mark generator for 0.1 ms markers.

ms (press in for MAIN

(R290) for

4-24

REV

JUN

1981

7B53A

Press and release the MAG switch to XlO (increase

the oscilloscope intensity as necessary).

CHECK---Crt display for one marker per division

between the second and tenth graticule lines.

ADJUST--Mag Gain control R762 for one marker per division. The second and tenth markers must coincide exactly with their respective graticule lines (position the display as necessary with the horizontal POSITION control).

10.

Adjust Main and Delayed Sweep Length

(R564,

R652)

Set the time-mark generator for 0.1 and 1 ms

markers. Press MAG switch to

X1.

Cali

bration--7B53N7B53AN

Adjustment

e. Change the following control settings: TIME/DIV OR

DLY

TIME 1 ms

DLY'D

MAlN TRIGGERING

f. Set the time-mark generator for 0.1 ms and lops

markers.

g. Rotate the DLY'D TRlG LEVEL control for a stable

display. Rotate the horizantal POSITION control to posi-

tion the eleventh

graticule line.

Time/ .1 ms (press in for DLY'D

Division SWP Display Mode)

LEVEL Set for DLY'D TRlG

LEVEL DLY'D SWP

0.1 ms marker to the center vertical

TRIG'D light on

TRIGGERABLE

b. Rotate the MAlN 'TRIGGERING LEVEL control fora triggered display. Rotate the POSITION control to position the eleventh 1 ms marker at the center vertical

graticule line (see Fig. 4-5).

Fig.

4-5.

Typical

CHECK--Crt display for sweep length of 10.4 divisions within 0.3 division, as shown by of display to the right of the center vertical graticule line

(see Fig. 4-5).

CRT

display when checking sweep length.

0.1

to0.7 division

CHECK--Crt display for sweep length of 10.4

h. divisions within 0.3 division, as shown by 0.1 to 0.7 division of display to the right of the center vertical graticule line.

ADJUST--,-R652, Dly'd Swp Length, for four 10 ps

markers to the right of the center vertical graticule line.

INTERACTION--Check step 4.

11.

Adjust Delayed Sweep

Sweep Stop

a. Set the time-mark generator for 1

b. Change the following control settings:

TIMUDIV

DLY TIME

DLY'D Time/

Division

MAlN TRIGGERING

LEVEL

DLY'D TRlG

LEVEL

(R576, R572)

TB53A/7B53AN

Start

and Delayed

markers.

1 ms

(pufl out for

INTEN Display Mode)

Set for stable display

RUNS AFTER DLY

TlME

d. ADJUST--Main Swp Length, R564 for four 0.1 ms

markers to the right

REV

JUN

1981

the center vertical graticule line. DLY'D SWP DISPLAY MODE.

NOTE

Coarse adjustments of the Delayed Start and

Delayed Stop controls will be made DISPLAY MODE followed by fine adjustment in the

the INTEN

4-25

Cali

7B53A

bration--7BS3A/7B53AN

Adjustment

c. CHECK-With the DELAY TlME MULT dial set to

1.00, check that the intensified sweep starts on the second marker (position as necessary).

d. ADJUST-Dly'd Start,

sweep on the second marker.

e. CHECK--Rotatethe DELAY

and check that the intensified sweep starts on the tenth

marker.

f. ADJUST-Dly'd Stop control R572 to start the

intensified sweep on the tenth marker.

g. Change the following control settings:

TIMUDIV OR

DLY

TIME 1 ms

DLY'D

Time/ 10

Division DLY'D SWP Display Mode)

DELAY

h. ADJUST---Observe the timc-marker and adjust R576 to start the delayed sweep at the bottom of marker (see Fig. 4-6). Use the POSITION control to position the

display to the center vertical graticule line. If the marker is not displayed, repeat parts b through d, g, and h.

TIME MULT 1

R576, to start the intensified

TIMEMULTdial to9.00

,us

(press in for

.OO

(B)

Incorrect delayed sweep starting point.

Rotate the DELAY TIME MULT to9.00. Obeservethe time-marker and adjust R572 to start the delayed sweep at the bottom of marker (see Fig. 4-6). Use the

control to position the display to the center vertical graticule line. If the marker is not displayed, repeat parts b, e, f, g, and

j. INTERACTION-.-Repeat t he adjustment of R572 and

R5'76 as necessary.

12.

Adjust

quency

a. Set the time-mark generator for

TlMElDlV OR TlMWDlV OR

DLY'D Time/ DLY'D Time/

MAIN TRIGGERING Set for stable main DLY'D TRIG

Main and Delayed Sweep

Timing

Change the following control settings: f. Change the following control settings:

DLY

Division

LEVEL sweep display LEVEL RUNS AFTER DLY TIME

.l-lME

(C594,

C691)

,us DLY

ps Division SWP Display Mode)

POSlTiON

High-Fre-

,us markers.

Rg.

4-6.

and Dly'd

.1 ,us marker with the second vertical graticule line and the tenth

within 0.16 division (2%).

one marker each division.

Typical CRT display for adjustment

c. Rotate the POSITION control to align the second

.1 ,us marker with the tenth vertical graticule line.

CHECK--Ct"t display for .1

e. ADJUST--Main Swp HF Timing control

Sweep

Stop.

Dly'd Sweep Start

,YS

marker per division

,YS

,us

(press in for DLY'D

C594

for

4-26

REV

JUN 1981

g. Rotate the POSITION control to align the second

7B53A

ps marker with the second vertical graticulelineandthe

tenth marker with the tenth vertical graticule line.

Cali bration-9BS3N7B53AN

13.

Check Delayed

a. Set the controls as given under Preliminary Control

Settings.

Sweep

Gate Output

Adjustment

h. CHECK-Crt display for

within 0.24 division

i. ADJUST---Dly'd Swp

one marker each division. Use the

necessary to align the display.

Change the following control settings:

TIMWDIV OR

DLY

TIME 1 PS

DLY'D Time/

Division SWP Display Mode)

MAIN TRIGGERING

LEVEL Set for stable display

k. Set the time-mark generator for 1

I. Rotate the DELAY TlME MULT dial to 1.00. Rotate the dial as necessary to start the delayed sweep in the second time-marker. Note the exact DELAY TIME dial setting.

m. Rotate the DELAY from the dial setting noted in part k.

n. CHECK----Delayed sweep to start on the tenth time marker.

ADJUST--C594, Main

o. delayed sweep on the tenth time-marker.

p. Disconnect all test equipment.

(3Oh).

.1 ps marker each division

Timing control C691 for

POSI'I'ION control as

.05 ps (press in for DLY'D

ps markers.

MUL'T

TIME MULT dial exactly 8.00

Timing, to start the

b. Connect the Delayed Gate Out multi-pin connector, P613, so the signal is connected to the front-panel DLY'D TRlG IN connector. See Fig. 4-1 for connector location.

Connect a 42-inch 50

TRIG IN connector to the 7A16A input.

DLY'D

d. Set the Delayed

e. Set the sion with DC input coupling.

f. Change the following control settings:

DLY

TIME/DIV OR

DLY

DLY'D

Division

g. CHECK---The crt display for positive-going rectangular pulse with the baseline level from peak amplitude of 3.5 the pulse is intensified (verifies that delayed-gate pulse is same duration as delayed sweep).

h. Disconnect the Delayed Gate Out signal from the DLY'D TRIG IN connector by reversing

This completes the Adjustment procedure for the 7B53AI7B53AN. Disconnect all test equipment.

7A16Afor adeflectionfactor of onevolt/divi-

TIME MULI 5.00

TIME 1 ms

lime/ .1 ms (pull out for

'Triggering SOURCE switch to INT.

INTEN Display Mode)

within 1.4

coaxial cable from the

to 1 V and peak-to-

Check that the top of

P613. See Fig. 4-1.

REV JAN

1985

NTENANCE

7B53A

Section

5--7B53Al7B53AN

Introduction

This section of the manual contains maintenance information for use in preventive maintenance, corrective maintenance, andtroubleshootingof the7B53N7B53AN.

PREVENTIVE

MAINTENANCE

General

Preventive maintenance consists of cleaning, visual

inspeciton, lubrication, etc. Preventive maintenance performed on a regular basis may prevent instrument

breakdown and will improve reliability of this instrument. The severity of the environment to which the 7B53N7B53AN is subjected determines the frequency of

maintenance. maintenance is preceding recalibration of the instrument.

convenient time to perform preventive

Cleaning

The 7B53A/7B53AN should be cleaned as often as

operating conditions require. Accumulation of dirt in the instrument can cause overheating and component breakdown. Dirt on components acts as an insulating blanket and prevents efficient heat dissipation. It may also provide an electrical conduction path.

The

dust which reaches the interior of the

'Overs

Operation of the system without the oscilloscope covers in place necessitates more frequent cleaning. When the instrument is not in use, it should location such as a dust-tight cabinet.

Avoid the use of chemical agents which might

damage the plastics used in this instrument. Avoid

chemicals which contain benzene, toluene, zylene,

acetone, or similar solvents.

the

oscilloscope

reduce

bestored in a protected

the

amount

7B53N7B53AN.

Interior.

removed occasionally due to its electrical conductivity

under high-humidity conditions. The best way to clean the

interior is to blow off the accumulated dust with dry

velocity

paint brush or cloth dampened with a mild detergent and water solution. A cotton-tipped applicatior is useful for cleaning in narrow spaces.

Dust in the interior oftheinstrument should be

air. Remove

any

dirt

which remains

with a soft

low-

Visual Inspection

The 7853N7B53AN should be inspected occasionaily for such defects as broken connections, broken or damaged circuit boards, relays, and heat-damaged parts.

The corrective procedure for most visible defects is obvious; however, particular care must be taken if damaged components are found. Overheating usually indicates other trouble in the instrument; therefore, it is important that the cause of overheating be corrected to

prevent a recurrence of the damage.

improper1 y seated transistors or

heat-

Semiconductor Checks

Periodic checks of the transistors, FET's, and IC's used

7653A/7653AN are not recommended. The best

in the indication of performance is the actual operation of the device in the circuit. Performance of the circuits is

thoroughly checked during recalibration; substandard

semiconductors

will

usually

detected

that

time.

Recali bration

To ensure accurate measurements, check the calibra-

1000

tion of this instrument each

every six months if used infrequently. In addition, replace-" ment of components may necessitate recalibration of the affected circuits. Calibration instructions are given in Section

hours of operation or

Static-Sensitive Components

Exterior.

7B53N7B53AN can be removed with a soft cloth or small paint brush. The paint brush is particularly useful for dislodging dirt on and around the front-panel controls.

Dirt

which remains can be removed with a soft cloth dampened in Abrasive cleaners should not be used.

REV

Loose dust accumulated on the outside of the

mild detergent and water solution.

JUN

1980

Static discharge can damage any semiconductor

component

This instrument contains electrical components that

are susceptible to damage from static discharge. See

this instrument.

'Table 5-1 for relative susceptibility of various classes of Table

7B53A

semiconductors. Static voltages of 1 kV to 30 kV are common in unprotected environments.

Observe the following precautions to avoid damage:

1. Minimize handling of static-sensitive components.

ransport and store static-sensitive components or assem blies in their original containers, on a metal rail, or on conductive foam. Label any package that contains static-sensitive assemblies or components.

Dischargethestaticvoltagefrom your body by wearing Schottky IPL

wrist

strap

while

handling

vicing static-sensitive assemblies should be performed only at a static-free work station

by qualified service personnel.

these

components,

or components High-frequency 5

Ser-

MOS or CMOS microcircuits or discretes, or linear microcircuits with MOS inputs (Most Sensitive) 1

Schottky signal diodes

JFETS

Linear microcircuits

RELA'TIVE SUSCEPTIBILITY

STATIC DISCHARGE DAMAGE

Semiconductor Classes Levelsa

5-1

Relative

Susceptibility

Nothing capable

charge should be allowed on the work station surface.

5 Keep the component leads shorted together whenever

poss~ ble

Pick up components by the body, never by the leads.

Do not slide the components over any surface.

~~~,d handling

work-surface

charge.

Use a soldering iron that is connected to earth ground.

10. Use only special antistatic suction type or wick type desolderi ng tools.

generating or holding a static

components covering

capable

areas

that

of generating

have

floor

static

Low-power Schottky TTL

TTL (Least Sensitive)

aV~ltage equivalent for levels: 1

100 to 500 V 4 - 500 V

200

250 V 6 600t0800V (Voltage dischargedfrom a 100 pFcapacitorthrough a resistance of 100 ohms.)

500

..-.----p-w----..-

400

600

400 to 1000 V (est)

1200V

TROUBLESHOOTING

Introduction

The following information is provided to facilitate troubleshooting of the 7B53N7B53AN. Information contai ned

along with the following information to aid in locating the defective component. An understanding of the circuit operation is very helpful in locating troubles. See the Circuit Operation in Section

Troubleshooting Aids

in Section of each component in this instrument are shown on the diagrams.

in other sections of this manual should be used

Diagrams. Circuit diagrams are given on foldout pages

The component num ber and electrical value

Before using any test equipment to make measurements on static-sensitive components or assemblies, be certain that any voltage or current supplied by the test equipment does not exceed the limits of the component to

be tested.

8-2

Circuit Boards. Fig.

tion) shows the location of the circuit boards within this in-

strument along with the assembly numbers. The assembly numbers are used on the diagrams to aid in locating the boards. Pictures of the circuit boards are shown in the

grams section, on the back of the page opposite the circuit

(located in the Diagrams sec-

Dia-

REV

JUL

1986

diagram, to aid the cross-referencing between the diagrams

7B53A

and the circuit-board pictures. Each electrical component on the boards is identified

its circuit number as well as the

interconnecting wire or connectors. The circuit boards are

also outlined on the diagrams with a black line to show

which portions of the circuit are located on a circuit board.

Switch Cam Identification. Switch cam numbersshown on the diagrams indicate the position of the cam in the complete switch assembly. The switch cams are numbered from front to rear.

Diode Color Code. The cathode end of each glass

encased diode is identified by a stripe, a

seric?s of stripes,

or a dot. For most silicon or germanium diodes with a

series of stripes, the color code also indicates the type of diode or identifies the 'Tektronix Part Number using the

resistor color-codesystem

(e.g., a diodecolor coded blue-

or-pink brown-gray-green indicates Tektronix Part No.

152-0185-00).

7'he cathode and anode ends of a metalencased diode can be identified by the diode symbol marked on the body.

Transistor and Integrated Circuit Basing. Fig. 8-1

(located in the diagrams section)

tllustrates basing con-

figurations for all transistors and integrated circuits used

in the

7B53N7B53AN.

Wiring Color Code. Insulated wire and cable used in the

7B53N7B53AN is color-coded to facilitate circuit tracing.

lnterface Connector Pin Locations. The lnterface cir-

cuit board couples the

7B53A/7B53AN to the associated oscilloscope. Fig. 5-1 illustrates the locations of pins on the interface connector as shown on the Voltage distribu-

tion and Output Connectors schematic in the diagrams

section.

the detailed Operating Instructions in the

7B53N7853AN

Operators Manual.

Check Associated Equipment. Before proceeding

with troubleshooting of the

7B53A/7B53AN, check that the equipment used with this instrument is operating correctly. Check that the signal is properly connected and

that the probe (if used) is not defective. The indicator

oscilloscope and vertical plug-in unit can be checked for proper operation by substituting another time-base unit which is known to be operating properly (preferably another

7B53A/7B53AN or similar unit). If the trouble persists after substitution, the oscilloscope or vertical plug-in unit should be checked.

Visual Check. Visually check the portion of the

instrument in which the trouble is located. Many troubles

can be located by visual indications such as unsoldered

connections, borken wires, damaged components.

Check Instrument Calibration. Check the calibration of this instrument, or the affected circuit if thetrouble exists in one circuit. The apparent trouble may only be a result of misadjustment and may be corrected by calibration. Complete calibration instructions are given in the

Calibration section.

Isolate Trouble to a Circuit. 'To isolate a trouble to a

particular circuit, note thetroublesymptom. The symptom

often indicates the circuit in which the trouble is located.

For example, if stable triggering can be obtained in

IN"!'

position of the SOURCE switch and cannot be obtained in the EXT or LINE positions, the External Trigger Preamp or Trigger Source Switching circuits are probably at fault. When trouble symptoms appear, use the front-panel controls and the crt display to isolate the trouble to one circuit. Remember, the amplifier unit or the indicator

Troubleshooting Techniques

This troubleshooting procedure is arranged in an order which checks the simple trouble possiblitiesfirst. few checks ensure proper connection, operation, and calibration. If the trouble is not located by these checks, the remaining steps aid in locating the defective component. When the defectivecomponent islocated, replaced following the replacement procedures given under Corrective Maintenance.

Check Control Settings, Incorrect control settings can indicate a trouble that does not exist. If there is any question about the correct function or operation of any control, see the Operating Instructions in this manual or

REV

JUL

1986

Thefirst

sould be

Fig. 5-1.

Location of pins on interface connector.

oscilloscope may be responsible for the trouble. When

7B53A

trouble appears in more than one circuit, check all

affected circuits by taking voltage and waveform

measurements. Once the defective circuit has been located, proceed with steps component(s).

Check

procedures describe methods of checking individual components in the soldered in place are best checked by disconnecting one end. This isolates the measurement from the effects of surrounding circuitry.

a. TRANSIS'TORS. The best check of transistor operation is actual performance under operating conditions, can be checked by substituting a new component or one which has been checked previously. However, be sure that circuit conditions are not such that a replacement transistor might also be damaged. transistors are not available, usea dynamictester (such as PEKTRONIX Type

b. INTEGRATED CIRCUITS, Integrated circuits should not be replaced unless they are actually defective. The best direct substitution with a new component or is known to be good. Be sure that circuit conditions are not such that a replacement component might be damaged.

for a short term~nals with an ohmmeter set to the R XI k scale. The

diode resistance should be very and very low when the meter leads are reversed. Do not check tunnel diodes or back diodes with an ohmmeter.

Individual Components.

7B53A/7B53AN. Components that are

lf a transistor is suspected of being defective, it

metfiod for checking these devices is by

DIODES. A diode can be checked for an open or

c~rcuit by measuring the resistance between

and 7 to locate the defective

The following

If substitute

576).

onewhich

hlgh in one direction

checking the waveform response when high-frequency signals are passed through the circuit. Partial shorting often reduces high-frequency response.

f. CAPACITORS. A leaky or shorted capacitor can

best be detected by checking the resistance with an

ohmmeter on the highest scale. voitage rating of the capacitor. The resistance should be high after initial charge of the capacitor. An open capacitor can best meter or by checking whether the capacitor passes ac signals.

Repair and Readjust

parts are located, follow the replacement procedures given in this section. Be sure to check the performance of any circuit that has been repaired, or that has had any electrical components replaced.

be detected with a capacitance

the

Circuit.

not exceed the

any defective

CORRECTIVE MAINTENANCE

General

Corrective maintenance consists of component replacement and instrument repair. Special techniques required to replace components in the instrument are given here.

Obtaining Replacement Parts

Most electrical and mechanical parts can be obtained through your local tative. However, you should be able to obtain many of the standard electronic components from a local commercial source in your area. Before you purchase or order a part from a source other than Tektronix, electrical parts list for the proper value, rating, tolerance and description.

Tektronix Field Office or represen-

Inc., please check the

not

use

an ohmmeter scale that has a h&h internal

current. High currents may damage the diode.

d. RESISTORS. Resistors can be checked with an

ohmmeter. Check the Electrical Parts List for the

tolerance of the resistors used in this instrument.

Resistors normally do not need to be replaced unless the measured value varies widely from the specified value.

e. INDUCTORS. Check for open inductors by check~ng continuity with an ohmmeter. Shorted or part~ally shorted ~nductors can usually be found by

NOTE

When selectrng replacement parts, rt is rmportant to

remember that the physical size and shape of

component may affect the performance rn the instr'urnent, par~icularly at high frequencies. All replacement parts should be direct replacements

unless

rf is known that a different component will not

adversely affect

When ordering replacement parts from 'Tektronix, Inc.,

include the following information:

instrument Type.

Instrument Serial Number.

~nstrument performance.

REV

JUL

1986

7B53A

A description of the part (if electrical, includecircuit

number).

rektronix Part Number.

defective connector ro your local Tektronix Field Office or representative.

b. Circuit-board Pins

Component Replacement

WARNING

Disconnect the equipment from the power source before replacing components.

Semiconductor Replacement.

used in this instrument should not be replaced unless actually defective. If removed from their sockets during routine maintenance, returnthem Unnecessary replacement may affect the calibration of

this instrument. When replaced, check the operation of

that part of the instrument which may be affected.

Replacement devices should be oft he original type or a direct replacement. Replace in the same manner as the original. Fig. 8-1 (located in diagram section) shows the lead configurations of the semiconductor devices used in this instrument. When turer's basing diagram for correct basing.

Interconnecting Pin Replacement.

interconnect~on are used in this instrument toconnect the

circuit boards wrth other boards and components. When the interconnection end-lead connector plugs into a socket on the board.

Other interconnections are made with a pin soldered onto the board. these interconnecting pins. If the mating connector is

mounted on a plug-on circuit board, a special socket is

soldered into the board. If the

end of a lead, an end-lead pin connector is used which

mates with the interconnecting pin. The following

mat~on provides the replacement procedure for the

various interconnecting methods.

Two types of mat~ng connectors are used for

replacing, check the manufac-

made with a coaxlal cable, a special

Semiconductor devices

totheir original sockets.

Two methods of

mat~ng connector is on the

infor-

NOTE

circu~t-board pin replacemenf kit including

necessary tools, rnstructions, and replacement

ava~lable from Tektronix, Inc. Order lektronrx Part

NO.

040-0542-00.

To replace a pin which is mounted on a circuit board, first disconnect any pin connectors. Then, unsolder the damaged pin and pull it out of the circuit board with a pair of pliers. Be careful not to damage the wiring on the board with too much heat. Ream out the hole in the circuit board with a 0.031inch drill. Remove the ferrule from the new interconnecting pin and the circuit board. Position the pin in the same manner as the sides of the circuit board. an angle to mate with a connector, to match the associated pins.

c. Circuit Board Pin Sockets

The pin sockets on thecircuit boards aresoldered to the rear of the board. To replace one of these sockets, first unsolder the pin (use a vacuum-type

desoldering tool to remove excess solder). Then straighten the tabs on the socket and the hole in the board. Place the new socket in the circuit board hole and press the tabs down against the board. Solder the tabs of the socket

board, being careful that solder does not flow into the socket.

pressthe new pin intothe holein

old pin. Then, solder the pin on both

If the old pin was bent at

bendthe new pin

plns

removeit from

tothe circuit

NOTE

The spfiing tension of the

sockets ensures a good

connection between the circuit board and the pin. This

spring tension can be destroyed

sockets as a connecting

pint for spring-loaded probe

using the pin

fks, alligator clips, etc.

a. Coaxial-Type End-Lead Connectors

Replacement of the coaxial-type end-lead connectors requires special tools and techniques; only experienced maintenance personnel should attempt replacement of these connectors. It is recommended that the cable or wiring harness be replaced as a unit. For cable or wiring harness part

numbers, see the Mechanical Parts List. An alter-

nate method is to refer the replacement of the

REV

JUL

1986

d. End-Lead Pin Connectors

"I-he pin connectors used to connect the wires tothe interconnecting pins are clamped to the ends of the associated leads. To replace damaged end-lead pin connectors, remove the old pin connector from the end of the lead and clamp the replacement connec-

tor to the lead.

Some of the pin connectors are grouped together

7B53A

and mounted in a plastic holder; the overall result is

that these connectors are removed and installed as a

multi-pin connector. To provide correct orientation of this multi-pin connector when it is replaced, an arrow (or dot) stamped on the circuit board and a

matching arrow is molded the multi-pin connector. Be sure these arrows are aligned as the multi-pin connector isreplaced. If the individual end-lead pin connectors are removed from the plastic holder, note the color of the

individual wires for replacement.

Switch

7B53N7B53AN are the pushbutton switches and the cam-

type switch. The following special maintenance inf ormation is provided.

a. PUSHBUTT-ON SWITCHES. Use the following

procedure to replace pushbutton switches:

Replacement,

Two type of switches used in the

intothe plastic housing of

Loosen any multi-pin connector(s) associated with

the switch being replaced and unsolder leads or

ponents where necessary.

7. When the switch being replaced is clear from

external connection, assembly.

To replacethe pushbutton switch, reverse the above

procedure. Observe the following precautions:

a. Make sure that the clear plastic flange and the

DLY'D

switch position from which they were removed (AMPL).

Time/Division knob are replaced at the same

remove

the

com-

b. When replacing the DLY'D

and the clear plastic flange,

NOTE

See Mechanical Parts exploded views fo aid pushbutton switch removal.

Set the 1IME/DIV OR DLY 'TIME and DLY'D

TimelDivision switch to AMPL to provide easy access to

the setscrew on the clear plastic flange and to facilitate

replacement of the

Loosen the setscrews and remove the LEVEL,

SLOPE, POSITION, FINE, VARIABLE, and DLY'D

LEVEL controls. Loosen two setscrews and remove the

DLY'D remove the clear plastic flange associated with the TIMWDIVOR DLY TIMEswitch (setscrew behind thefront subpanel).

latch.

switch mounting screws.

the chassis and the screws holding the switch to be contact your local replaced to the front subpanel.

Time/Division knob. Loosen one setscrew and

3. Remove the spring from the

Remove front panel to gain access to pushbutton

Loosen four screws holding the front subpanel to asststance on maintenance of the cam switch.

Time/Division switch.

7B53A/7B53AN release

TRIG

the shaft but do not tighten. Then install the DLY'D TimelDivision knob (it takes a little pressure) and tighten in place. Next, push the clear plastic flange (from behind the front subpanel) until it seats properly with the DLY'D 'This

will prevent backlash between theclear plasticand

the DLY'D

b. CAM-TYPE SWITCH. The cam switch used in the 7B53N7B53AN consists of two rotating cams (front portion for

DLY'D adjacent Interface circuit board. These contacts are activated by lobes on the cams as the switch is rotated. The switch can be disassembled for inspection, cleaning, repair, or switch be rernovedfrom the instrument only as a unit. See

Fig.

5-2

Repatr of the cam switch should be undertaken only by skilled maintenance personnel. Switch alignment and contact spacing must be carefully maintained for proper operation of the switch. The cam switch repalr kit (Tektronix Part No. special alignment tools for use in repairing or replacing the switch contacts. For information or

representative.

TIME/DIV OR DLY TIME and rear portion for

Time/Division) which mate with contacts on an

replacement, but it is recommended that the

for special instructions on cam-switch removal.

Time/Division knob and lock in place.

Tinre/Division knob as the cam is rotated.

rektronix Field Office or

*I'ime/Division knob

slidethe plasticflangeonto

040-0541-00)

contains

5-6

REV

JUN

1980

7B53A

Set the ?'IME/DIV OR DLY TIME AND DLY'S TIME/ Division switches to AMPL to provide easy access to the srew on the clear plastic flange (rear of front subpanel) and to facilitate replacement of the switches.

Loosen two setscrews to allow removal of VARIABLE control shaft (rotate the VARIABLE control

Remove VARIABLE knob and shaft through front of

instrument.

Loosen two setscrews and remove DLY'D TimeIDivision

knob.

Loosen remove clear plastic flange.

6. board cam-switch.

7. Remove MAG switch extension from switch and remove extension through front panel.

9. board.

10.

to Interface board

setscrews

Remove two interconnecting cables from rear of readout

(7B53A only) and one cable from interface board (rear of

Remove four interconnecting cables from sweep board. Remove six screws, from sweep board and remove sweep

Remove eight screws holding cam-switch assembly

(located rear of front subpanel) and

(six

screws

7653AN).

set-

necessary).

\-;;;z'J

Do not remove screws holding Readout board to camswitch (7B53A only

'-11

-I_II__-U______I-

11.

Remove cam switch assembly. Follow the procedure as given in the switch repair kit to

12.

remove, replace, etc., the contacts on the

TO replace the cam switch, reverse the above procedure.

13. mve the fdloeng precautions.

a. The innerconcentric shaft of the cam switch must be properly aligned for correct switch operation. Insert concentric shaft into rear of cam switch and push all the way

(it may be fully clockwise (as viewed from rear outward to

b. When fastening the cam-switch to the lnterface board, tighten the screws evenly, (recommended torque is three inch pounds).

c. When replacing the sweep board, do not apply must pressure until it is certain that all pins from the Interface board have mated with the

d. Make sure that the clear plastic flange and the DLY'D

YimeIDivision knob replaced at the same switch position from

e. When replacing the DLY'D clear plastic flange tighten. takes a little pressure) and tighten in place. Next, push the clear plastic flange {from bhind the front sub-panel) until scats properly with the DLY'D TimelDivision knob and lock

in place.

TlmelDivision knob and the clear plastic flange as the cam is

rotated.

necessary to rotate shaft slightly). Rotate shaft

lock into place.

conrrectors on the Sweep board.

wh~ch they were removed (AMPL)

slide the flange onto the shaft but do not

Then install the DLY'D

This will assure no backlash between the DLY'D

Interface board.

cam switch) and pull

TimeIDivision knob and the

TimeIDivision knob (it

inner-

1342-34

REV

JUN

1980

Fig.

5-2.

Cam

Switch

Removal.

Section 6---7B53AlfB53AN

7B53A

Information pertaining to Option 5 can be found in Tektronix manual part number:

070-1471-00,

JUN

1980

REPLACEABLE

7B53A

Section

7-7853Af7853AN

ELECTRICAL

PARTS

PARTS ORDERING INFORMAPlON

Replacement parts are avatlable from orthrough your local Tektronix, Inc. Field Office

or representative,

Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available, and to give you the benefit of the latest circuit improvements developed in our engineering

ordering parts. to include the following information in your order: Part number, instrument type or number, serial number, and modification number if applicable.

If a part you have ordered has been replaced with a new or improved part, your local

Tektronix, Inc. Field number

Change information, if any. is located at the rear of this manual.

Officeor representativewillcontact you concerningany change in part

deparlment. It is therefore important, when

SPECIAL NOTES AND SYMBOLS

XOOO

OOX Part removed after this serial number

Part first added at thts serial number

In the Parts Llst. an ltem Name

Because of space Itmttatlons,

Item Name identtficatton

further uttlized where poss~ble

ACTR ASSY CAP CER CKT COMP CONN ELCTLT ELEC INCAND LED NONWIR

ACTUATOR ASSEMBLY CAPACITOR CERAMIC CIRCUIT COMPOSITION CONNECTOR ELECTROLYTIC ELECTRICAL INCANDESCENT

EMI'TT-ING DIODE

LIGHT

WIREWOUND

NON

ITEM

NAME

separated from the descr~pt~on by a colon

ltem Name may somettmes appear as tncomplete For

the US Federal Catalogtng Handbook

H6-1

ABBREVIATIONS

PLSTC

QTZ

RECP RES RF SEL SEMICOND SENS VAR WW XFMR XTAL

PLASTIC QUARTZ RECEPTACLE RESISTOR RADIO FREQUENCY SELECTED SEMICONDUCTOR SENSITIVE VARIABLE WIREWOUND TRANSFORMER CRYSTAL

( )

can be

REV

DEC

1982

Rep1

7B53A

aceabl

ectrical

Parts - 7653AI7B53AN

CROSS INDEX - MFR. CODE

b~ufacturrtr

NYTRONICS COMPONENTS GROUP INC SUBSIDIARY SANW WESTON INC COMWNENTS DIV ALLM-BRADLEY CO CHERRY ELECTRICAL PROWTS CORP HAMILTON STANDARD CONTROLS INC SPECTROL DIV AMPWM ELECTRONIC CORP FERROXCUBE DIV RCA CORP SOLID STATE DIVISION GENERAL ELECTRIC SEMI-CONWTOR PRWTS DEPT PYlMFILM DIV DIV OF AVX CERAMICS DIV

MTTd9OtA INC S EMICONWCTOR PROWCTS SECTOR

UNION CARBIDE MATERIALS SYSTEMS DIV FA1 RCHILD SEMICONWTOR CORP NORTH SUB OF TRW INC TRW IRC FIXED RESISTORS/BURLINGTON LICON DIV OF

CLAROSTAT MFG CO INC AMPHENOL

I77

IIT SEMImMTORS

A DIVISION OF INTERNATIONAL

TELEPHONE

CADDDCK

RPCO/CENTRALAB

NORTH AMERICAN PHILIPS CO

CORNING

UNION CARBIDE CORP ELECTRONICS DIV

IT1 SCHAWW INC BOURNS

IRIWT DIV

SPECTRUM CONTROL

HEWLEPT-PACKARD CO OPIWLECRONICS DIV

PLESSEY WING CORP PLESSEY OPTOELECTRONICS AND

MICROWAVE

STmNER ELECTKMICS INC TDK ELECTRONICS CORP

NICHICON SPRAGUE ELECTRIC CO

WORLD HEAOQUARTERS R-OM CORP GENWL INSTRLMENT CORP OPTOELECTRONICS DIV GTE PRODUCTS CORP LIGHTING PROWCTS GROUP TUSONIX INC

MEPCO/CENTRAIAB A NORTH AMERICAN MILIPS CO XIWNSON E F

NYTRONICS INC

KDI ELECTRONICS INC

AMERICAN SALES

SCHL1B'BERGER LTD

lUINOIS TlXll

CADRE

SEMICONDUCTORS DIV

ELECWNICS

GlASS WORKS

GORP

DIV BWJKER

AND

TELEGRAPH CORP

AVX CORP

KRKS

INC

/AMERICA/ CORP

118

INC

RAMO

SAM RD

1201 3600 17070 E GALE AVE P 5083 KINGS

ROUTE 202

19M AVE SOUTH P

5005 E 11901 WISON AVE 10400 RIDGEVIRJ CT

2850

1714 N

CORP

500 P 0 BOX 168

1717 CHICAGO AVE P

550

8081

1200 2185

370 1641 KAISER AVE IRVINE CA

6135 AIRWAYS BLVO

12 927 E STATE PKY 92 HAYDEN AM

16931

3400

60 BOSTON ST 7741 N

7158 MERCHANT AVE

299 10M AYE S

NUMBER

BOX

128 SWTH 2ND ST SWSET AVE

BOX 1220

ibM

GENESEE ST

BOX 867

MCWWELL RD

PLEASANT AVE BURLINGTON IA 52601

DAMEN AVE

BOX

760

HIGH

276 SE

BOX 5928

WALLACE RD COLUMBIA AVE

WEIGW ST

TRIWLE

BOX 21947

HARBOR

PARK

TO MANUFACTURER

PICKENS SC 29671-9716 MILWE WT 53204-2410

WALJKEG4N

CITY OF INDUSTRY

SDMERVILLE AUBURN NY I3021 WlPPmY MYRTLE BWH SC 29577

WENIX CLEVELAND OH 44101 CUPERTINO CA 95014

DOVER

LOS GATOS CA WEST PALM BEACH FL

MEm

RIVERSIDE MINERAL WELLS

EDEN PRAIRIE MN 55344-2224 RIVERSIDE CA 92507-2114

WIE PA 16505

SAN

JOSE

WRT

WASHINGTON NY 11550

SCMLIG

LMIMM

MILLIKEN AVE

HILLV1O.i AVE

BllSINESS PARK

BOX

37144

IRVINE PAL0 ALTO

SALEM TUCSON

PASO

WECA

MFI

IL 60087-3214

91749

08876

07981-1001

81joo8-4229

03820

01841-3002

92507-2302

76067-0760

95131

92714-57@3

L 60195-,4526

02173-7929

92713

94304-1319

01970-2147

85740-7144

79915-1207

56093-2539

REV

MAR

1988

Replaceable Electrical

7B53A

Parts - 7853M7B53AN

CROSS INDEX

MFR.

CODE NUMBER TO MANUFACTURER

Mr.

CoQ?

75042 IRC ELECTRONIC CCMPONENTS 401 N BROAD ST PHILADELPHIA PA 19108-1001

80009 TEKTRONIX INC 14150 SW KARL BRAUN 80031

91637 TK1345

PHILADELPHIA TRW FIXED RESISTORS

MEPCO/ELECIKA DALE ELECTRONICS INC 2064 12TH AVE COLWS NE 68601-3632

ZMAN

AN0 ASSOCIATES 7633 S 180TH KENT

OIV

INC

BOX

500 6 53-111

22 COLWBIA RO WRRISTCWN

BOX

609

BEAVERTON OR 97707-0001

98032

07960

REV MAR

1988

Rep1

7B53A

aceabl

ecti-ical

Parts

7853Af7BSAN

Mr.

CIRCUIT BD ASSY: INTERFACE 80009 670-2257-00

(7853A ONLY)

CIRCUIT CIRCUIT

CIRCUIT

(7853AN ONLY)

CIRCUIT

(7853AN ONLY)

CIRCUIT

(7853AN ONLY)

(7853A ONLY) (7B53A ONLY)

ASSY :INTWFACE 80009 670-2257-02 BD ASSY: INTERFACE 8W 670-2257-04 BD ASSY : INTERFACE 80009 670-1863-00

ASSY:INTWKE 800119 670-1863-01 8D ASSY: INTERFACE 80009 670-1863-02

CIflCUif CIRCUIT CIRCUIT CIRCUIT

CIRCUIT

(7853A ONLY CIRCUIT CIRCUIT BD ASSY :TRIGGER CIRCUIT

(7853AN ONLY)

CIRCUIT CIRCUIT CIRCUIT

ClRUJIT BD ASSY:SWEEP

CIRCUIT BD ASSY :SWEEP CIRCUIT

CIRCUIT 80 ASSY:DELAYED CWPLING CIRCUIT CIRCUIT

(7853A INCLllDES REAWUT AND ACTUATOR)

CIWIT

(7BSA.RWIOUT ONLY,SUBPARY OF 670-225&01)

CIRCUIT 80 ASSY :REAWUT 80009 670-2258-00

(7853A ONLY)

CIRCUIT

(7853A ONLY)

CIRCUIT

(7853A ONLY)

CIRCUIT

ASSY:TRIG(iER SOigiCE SW

PSSY:TRIGGER COUPLING

ASSY: f'RIGGER

ASSY :TRIGGER

80 ASSY:TRIGGER

ASSY:TRIWR

ASSY:TRIGGER

ASSY:'IRIm MOOE BD ASSY:SWEEP BD ASSY:SWEEP

ASSY :SWEEP

BD ASSY:OELAYED CWPLING 80009 670-1866-01 80 ASSY:READOUT 80009 670-2258-01

ASSY:READMJT 80009 670-2258-00

BD ASSY :READOUT 80009 670-2258-02 80 ASSY:READ(XIT

BD ASSY:TRIffiER SHIELD

80009 670-1867-00 80009 670-1864-00 80009 670-1864-01 80009 670-1864-02 80009 670-1864-03 80009

80009

80M39

670-1864-04 670-1866-00

670-2258-03

670-2216-00

7-4

CAP,FXD,MICA D1:36PF,1.4%,100V 00853 D155W60M CAP, VAR,CER 01 :9-35PF, 200V CAP,FXD.CER DI CAP, FX0.CER 01 :68PF, CAP,FXO,CER DI:7.5PF.+I-O.SPF,SOOV CAP, FXD, CER DI : 15PF,9.50&! 52763 2RDPLZ007 15W

CAP,FXD.CER DI:O.01UF,+100-0%,500V 59660 871-533E103P CAP,FXD,CER DI :0.01UF,+100-0"k,500V 59660 871-533E103P CAP,FXD,MICA Dl :98PF,5%,500V 00853 D105F980JO CAP,FXD,CER DI :27PF.+/-2.7PF,W 52763 2RDPU007 27W CAP. FX0,CEIT DI : 2.7PF.+/-0.25PF. 500V 52763 2RDPLZOO7 2P70CC

(7WA ONLY)

CAP,

FXD.CER DI :2.7PF,+/-0.25PF.500V 52763 2RDPU007 2P7CCC

(7853AN ONLY)

CAP, FXD,CER DI:0.022UF,+80-2056,25V 59821 2DDU60E223Z CAP, FXD.CER 01 : IOOPF,20k,350V 52763 2ROPLZ007 lOOPMU CAP,FXD.MICA DI:56PF,l%, 100V CAP,FXD,CER 01 :2.7PF,+/-0.25PF,500V 52763 2RDPLZ007 2P7CCC

SPF,+/-0.5PF,500V

10%

500V

33095 53-717-001 D9-35

52763 ZRDPLZ007 1P500S 52763 2RDPUOO7 52763 ZRDPLZ007 7PW

00853

D155E560FO

68W

REV

MAR

1988

C63

7B53A

C63 C64 C66 C68

283-0000-00 8010100 8209999 281-0605-00

281-0518-00 283-008060 283-0080-00

8210000

Replaceable

(7B53A ONLY)

CAP.FXD.CER 01 :2.7PF.+/-0.25PF.500V

(7853~~ ONLY) CAP,FXD,CW Dl CAP,FXD,CER DI:200PF,10%,500V

CAP,UO,CER DI :47PF,+/-9.4PF,500V CAP.FXD,CER DI :O.O22W.+80-2%,25V CAP, FXD.CER 01 :0.022W,+80-20%,25V

:O.

OOlUF.+lOO-0%,500V

Electrical Parts

Mr.

Part

7B53M7B53AN

C70 C74 C82

ClOl

C103 C103

C134

283-0080-00 283-0080-00 283-0080-00 290-0523-00 283-0010-00 BOlOlOO 283-0341-00 8050000

295-0156-00

8049999

CAP,FXD,CER 01 :0.022UF,+80-20%,25V CAP,FXD,CER DI:0.022W,+80-20%,25V CAP.FXD,CER DI:0.022UF,*20%,25V CAP, FXD, ELCTLT: 2.2UF.2E4.20V CAP, FXD.CER DI : O.OSUF.+80-2CPL,5OV CAP.FXD,CER DI:0,047UF. 10%.1OW

CAP SES,MATW:(Z) MATCHED 0.75%

(C134,C136,C138,C150 AND C152 WISHED

A UNIT)

(INDIVIDUAL TIMING CAPACITORS IN THIS ASSY

MUST BE ORDERED LETTER SUFFIX AND TOLERANCE PRINTED ON THE TIMING CAP TO BE REPLACED. THE TOLERANCE AND

LETTER SUFFIX SHOULD BE THE SAME FOR ALL OF THE TIMING CAPS IN THE ASSY. WLE:

(SEE MOWTE

{SEE FmTmTE ON C134) CAP. FXD. ELCTLT: 1UF. 20%. 50V CAP.FXD,CER 01 :0.1UF,20"L,50V CAP,FXD,CER DI :0.1UF,20%,100V

(SEE FOOTNOYE ON C134)

(SEE FCOTNOTE ON C134) CAP,FXD,CER DI :0.001UF,+100-0"~,500V CAP.FXD,CER DI:0.1UF,2%,100V CAP,FXD.CER DI :0.001UF,+100-a,mv CAP.FXD.CER OI:O.lUF,2m,100V CAP. FX0,CER 01 :O.OOIUF,+100-CPk. 500V

285-XXM-XX

lUF,

(2)0.01W, (1)lO.

BY THE 9-DIGIT PART NMER

F-)

C134)

1UF

283-0178-00 283-0000-00 283-0178-00 281-0178-00 BOlOlOO 8209999 283-0081-00 8210000 283-0000-00

281-0523-00 8210000 283-0081-00 BZlW 281-0542-00 BOlOlOO 281-0605-00 8130WO 8209999 283-0079-00 8010100 8209999 283-0002-00 8210000

C319 290-0517-00 8010100 8209999 CAP. FXD. ELCTLT:6.8UF,20%.35V 05397 T368B685M035AZ C323 281-0511-00 8210000 8229999 CAP. FXD.CER 01 :22PF,+/-2.2PF. 500V 52763 2RDPtZ007 22W C323 281-0123-00 8230000 CAP,VAR,CER DI : 5-ZSPF, 1OOV 59660 518-O(K1A5-25 C324 283-0633-00 8010100 8209999 CAP.FXD,MICA DI :77PF, 1%. lWV C330 283-0212-00 8010100 BZ CAP,FXD,CER 01 :21fF,20%,51)V 04222 SR405E20M C330 283-0203-00 8210000 CAP.FX0,CER 01 :0.47UF, 20%,50'J 04222 SR305SC47W

C340 281-0513-00 BOlOlOO 8147117 CAP,FXD,CER DI :27PF ,+/-5.4PF,SOOV 52763 2RDPLZO07 27POMP

C340 281-0605-00 8147118 8209999 CAP.

C340 281-0513-00 8010100 8144429 CAP. FXD,CER DI : 27PF,+/-5.4PF. 500V 52763 ZRDPLZOO7 27POMP

8129999

CAP.FXD,CER DI:O.lUF,ZCPL, 100V CAP,FXD.CER 01:0.001W,+100-CPL,500v CAP.FXD.CER DI:O. lUF,20%,100V

CAP,VAR,PLASTIC:1-3.SPF.500V

CAP,FXD.CER D1:O. lUF,+80-20%.25V CAP, FXD,CER DI:O.O01UF.+100-0%,SOOV

CAP,FXD,CER DI:lOWF,Zm,350V CAP,FXD,CER D1:0.1UF,+80-20%,25V CAP, FXD,CER DI : 18PF, 10%. 500V CAP.FXD.CER OI:200PF,10%,500V CAP.FXO,CER OI:O.OlUF.2CPL.250V CAP,FXD,CER

(7B5aA ONLY)

E(D.

(7B53A ONLY)

:0.01UF,+80-20%,50OV

CER

200PF. 10%. 500V 59660 301000Y5MOlK

00853

0155R70FO

Re@

7B53A

aceabl

Electrical

C340 281-0605-00 8144430 8209999 CAP.

281-0513-00

281-0513-00 8010100 8144429 CAP, FXD,CER DI : 27PF,:/-5.4W, 500V C344 281-0605-00 8144430 8209999 C347 283-0000-00 c350 283-0203-00 BZlOM]O CAP,R(D,CER 01:0.47UF,20%,50V

c359 283-0114-00 BOlOl00 8019999 CAP, FXD.CER DI: lWPF,%,200V C363 283-0047-00 8010100 8209999 CAP, FXD.CER DI :270PF,5%, 500V

C370 290-0782-00 8210000 CAP, FXO, (372 290-0782-00 8210000 CAP, FXD, C374 290-0782-00 8210000 CAP,

Parts

7135%/78X?AH

(7rnAN ONLY)

FXD,CER DI :200PF,10%. 500V

BOlOlOO 8147117 CAP,FXD,CER

BOlOl00 8209999 CAP, FXD,CER DI : 0. a01W,+lOD-0%, 50OV

(7853AN ONLY)

(7853A ONLY

(7WA

(7853A ONLY

CAP, RD,CER'DI

(7853AN ONLY)

(7rnAN ONLY)

EID.

:27PF,+/-5.4PF,500V

ONLY

f f

:200~~,10~,,500~

ELCTLT:4.7UF,+75-10%,35VDC

ELCTLT:4.7UF,+75-1PL,35VDC

ELCTLT:4.7UF,+75-10%.35VOC

283-0047-00 BOlOlOO 283-0000-00 B010100 283-OM32-00 8210MXi 281-0523-00 BOlOl00

290-0522-00 8010100

290-0527-00 281-0523-00 290-0522-00

281-0650-00 283-0047-00 8210000

8030000

CAP, FXD,CER DI : 10PF,+/-IPF, CAP, FXD, ELCTLT: lUF, 2%, 50V CAP,VAR,CER DI:2-8PF.350V CAP,FXD,CER DI:O. 1UF,+-80-20;/..25V

CAP,FXD,CER DI :0.001UF,+100-0"L,500V CAP,FXD,CER DI :O.OOlUF,+lOD-CE4.500V CAP,FXD,CER DI: 100PF,20%,350V

CAP,FXB,CER DI :O.IUF,+8&20%,25V CAP,FXU,CER 01 :18PF, 10"L,500V CAP, FXD.CER DI : 0.01UF.20%,250V CAP, FXD.CER DI :0.01UF,+80-20%,50OV

CAP.FXD.ELCTLT:6.8UF.20%.35V

CAP,FXD,MICA DI:77PF,I%,100V CAP, FXD,CER DI:0.47UF, 2ffk.5011 CAP,FXD,CER DI:ZUF,203b,SOV CAP,FXD,CER DI :27PF,+/-5.4PF.%OV CAP, FXD,CER DI :27PF,+/-5.4PF.500V CAP,FXD,CW DI :0.001UF,+100-0%,500V

CAP, FXD,CER CAP. FXD,CER DI : 1500PF. 5%.200V

(7853AN ONLY)

8209999 CAP, 8209999 CAP. FXD.CER DI :0.001UF.+100-0%.5OOV

5209999 CAP,FXD,CER

8209999

FXD. CER DI : 270PF, 5%. 5ODV

CAP,FXU,CER DI :0.01UF,+60-20%,50OV

FXD, ELCTLT: 1UF. 20%, 50V

CAP,

CAP,FXD.ELCTLT: 15UF,20%.20V CAP, FXD,CER Dl: lWPF,20%,350V

CAP, FXD, ELCTLT: lUF, 20%. 50V

CAP, FXD,CER DI : 18PF. 10%.200V

W,FXD,CER DI:270PF,5%,500V

0.47UF,

20%

:10aPF,20%,350V

50V

283-0087-00 290-0522-00 290-0522-00 281-0504-00 281-0523-00 290-0524-00

290-0522-00

CAP, FXD,CER DI :300PF, CAP, FXD, ELCTLT: lUF, 2%,5DV CAP, FXD, ELCTLT: lUF, 203b, 50V CAP,FXD,CER DI:lOPF,+/-1PF.500V CAP,FXD,CER 01:100PF,20%,35OV CAP, FXD, ELCTLT:4.7UF,20%, 10V

CAP,FXD, ELCTLT: 1UF,2%,50V

15%.

1000V

REV

trlAR

1988

Tektmix

7B53A

Part

No.

283-0003-00 290-0522-00 281-0593-00 290-0522-00

Replaceable Electrical

CAP,FXD,CER DI :0.01UF,+80-20"L,lW CAP, FXD, ELCTLT: 1UF. 2%. 5OV CAP,FXD,CER DI:3.9PF,+/-O.25PF,5OOV CAP, FXD, ELCTLT: 1UF. 2%,50V CAP, FXD.CER DI : 100PF,20%,350V CAP, FXD,CER DI :33PF. CAP,

FXD.CER DI :47PF,+/-4.7PF, 500V

CAP, FXD,CER DI :82PF. 10%. 500V CAP,VAR.AIR DI: 1.9-15.7 PF,250V

CAP. FXD,MICA DI :95PF, 1%,500V CAP, FXD, ELCTLT;2.2UF,20%,20V

CAP,FXD,CER DI : 10PF,+/-lPF, SOW CAP,FXD,CER OI:O.O033UF,5%,1OW CAP, FXD,CER 01 :0.001UFV+100-0%, 500V

CAP,FXD,CER DI :lOPF,+/-lPF,SOOV CAP,E(O,CER DI :lUF,+30-20"L,25V W,FXD,CER DI:47PF,+/-9.4PF,5W CAP,FXD,CER DI:47PF,+/-9.4PF,500V CAP,FXD,CER DI:O.OlUF,+BO-2%,150V W.FXD,CW DI :0.01UFC+80-20%,15OV

CAP,FXD,CER DI :lOPF.+/-lPF,50I1V

CAP.FXD,ELCXT:2.2UF,20%,2OV

CAP, FXD, ELCTLT: lUF, 2016.50V CAP, FXD,CER DI :0.01UF,+80-20"L,150V CAP,FXD,CER DI :10PF,+/-1PF,500V CAP. FXD.CER DI : 10PF,+/-lPF, 500V

5%.

600V

Parts - 785JM7B53AN

Paft

No.

D103Z40Z5WOCM T368AlOmW 2RDPLZ007 3P90CC T368A105M050AZ 2rnPU007 lOOFMU

2RDPU007 33WJC 2RDPU007 47PW 2RDPU007 82POKS

CAP. FXD.CER DI : 100PF,20%,350V CAP,FXD,CER DI :47PF,+/-9.4PF,500V CAP, FXO, ELCTLT: lUF,20%,50V CAP,FXD,CER DI :0.001UF,+100-G%,500V CAP.FXD,CER DI:5.6PF,+/0.5PF,500V CAP,FXD.CER Dl :10PF.+/-1PF,500V

CAP, FXD,MICA Dl :95PF,

CAP.VAR,AIR 01 :1.9-15.7 PF,250V CAP,FXD,CER 01 :0.001UF,+100-0%,500V CAP, FXD,CER DI :0.01UF,1-80-20%, 150V

FX0,CE.R DI :0.001UF,+100-0%,5OOV

CAP, CAP, FXD,CER DI :0.01UF,1-80-20%,150V

CAP,FXD,CER 01 :O.OlUF,+80-20%,15OV

CAP, FXD. ELCTLT: IUF, 2%. 50V CAP,

FXD,CER DI :O. 00lUF,+100-0%. 500V CAP. FX0,CER DI : 0.001UF,+100-0%, 500V CAP,FXD,CER DI:5.6PF,+/-0.5PF,50OV CAP, FXD, ELCTLT: 1UF. 2%, 50V

FXD. ELCTLT:47UF,20%,20V

CAP, CAP, FXD,ELCTLT:22UF,2%,15V CAP, FXD, ELCTLT:22UF,20%,35V CAP. FXD.CER 01 :O. OlUF,+80-20"L,lSOV CAP. FXD, ELCTLT:33UF, 20%,10V TANTALLM CAP, FXD, ELCTLT: lUF, 2016, 50V

CAP. FXD. ELCTLT:

CAP,FXD,ELCTLT:22UF,20%,15V

CAP, FXD, ELCTLT:22UF,20%,35V CAP,FXD,CER OI:O.OlUF,s80-2%,150V

SaYIICOND OVC,OI :SW,SI,30V,1~,30V,a0-35 SEMICOW

OVC,DI:SW,SI,30V,150MA,30V,W-35

1%.

500V

47UF. 20"L, 20V

REV

M4R

SEMICOFFD OVC,DI :%,GE,23,8W,W-7 (7853A ONLY)

1988

Rep1

7B53A

aceabl

ectri

czh

Parks

7853A17853AN

Wr.

Part

SEMICOND

DVCVDI:SW,SI,30V,150MA,30V.W-35

DA2527 (1N4152)

No.

(785% ONLY) SMICOND

DVC,DI:SW,SI ,30V,150MA,30V,DD-35

(7B53A ONLY)

SEMICOND

DVC,DI :SW, S1,30V.150M4,30V,W-35

(7B53A ONLY)

SEMICOND

(7853A ONLY

SEMICOND

DVC.DI :SW.SI.30V,150NANA30VV DD-35

DVC,DI

:SW,SI ,~OV,I~,~OV.DO-~~

(7B53A ONLY

SEMICOND

DVC,DI:SW,SI.~~V.~~~MA,~~V,W-~~

(7B53A ONLY)

CR.340 CR343 152-0141-02 CR361 152-0141-02 CR365 CR401 152-0141-02

152-0141-02 B010100 8209999

BOlOlOO B209999 6010100

152-0141-02 00101M) 8209999

8135836

8209999 0209999

SEMICON]

SEMICOND

SEMICOND SMICOND SMICOND SEMICDND

SEMICOND SEMICOND

DVC,DI:SW,S1,30V,150MA,3OV,W-35

DVC,DI

:sw,sI,~ov~~~~,~ov,~-~~

DVC.DI:SW,SI,3DV,150MA,30V,W-35

DVC.DI:SW,SI,30V,150MA,30V.D0-35

DVC,DI:SW,SI.30V,150HA,3DV,DD-35

DVC,DT:SW,S1.30V,150MA,30VVW-35

DVC.DI:SW,S1,30V,15W,3DV,DO-35

DVC,DI:SW,SI,30V,150MA,30V,W-35

SMICOND DVC,DI :SW,SI ,30V,15W,30V. W-35 SEMICOND SEMICOND SMICOND

SEMICDND

SmICOND DVC,DI SEMICOND

DVC,DI:SW,S1,3OV,15~,30V,DD-35

DVC,DI:SW,SI,30V,150MA,30VVW-35

DVC.DI:SW,SI,30V,150MA,30V,W-35 OVC,DI:SW,SI.30V,150MA,30V,DD-35

DVC,DI:SW,SI,30V,15OMA,30VVDO-35

:SW,S1,30VmlMMI\,30V,W-35

DVC,DI:SW,SI,30V,lSOM9,30V,W-35

S€.MICOND DVC,DI :SW,S1.30V.l50MA,30V. W-35

(7B53A ONLY)

SMICOND

DVC.DI:SW,SI.30V,150MA,3W,W-35

(7B53AN ONLY)

SEMICOND DVC,DI :SW,SI,30V.15W,30V,W-35 SMICDND SMICOND SEMICOND DVC.DI

DVC,DI:SW,SI.30V,150MA,30V.DO-35

DVC,DI:SW,SI,30V.150MA,30V,W-35

:SW,SI,30V,150MA,30V.W-35

SEMIW DVC,DI:SW,SI ,30V,150MCI130V,W-35

(7BS3A ONLY)

SEMICOND

(7WAN

DVC,DI:SW,S1.30V.150MA,30V,DO-35

ONLY)

CR4M 152-0141-02 B210000 CR407 152-0141-02 8210000 CR409 152-0141-02 BOlOlOO 6209999

CR440 152-0141-02 8010100 8209999 CR443 152-0141-02 BOlOlOO 8209999 CR461 152-0141-02 BOlOlOO 6209999

CR516 152-0141-02 CR519 152-0141-02 CR528 152-0141-02 B210000 CR556 152-0141-02 BlM)(]00 CR566 152-0141-02 CR582 152-0075-00 BOlOlOO 8241889 CR582 152-0322-00 6241890

SMICOND SEMICONO SEMICOND SMICOND

DVC,DI:SW,S1,30V,15OMAI3OV,W-35 DVC,DI:SW,SI.30V,15OMA,3W.DO-35

0VC,DI:SW,SI.30V,15W,3OVVDO-35

DVC,DI:SW,SI,30V,15W,30V,DO-35

SEMICOND DVC,DI :SW.SI ,30V.150MA.30V.W-35 SEMICON

SEMICW SEMICOND OVC, DI :SW, SEMICOND SEMICOND DVC,DI SEMICOND SWICOND

SEMICOND

SEMICOND DVC,DI SEMICONO SMICOND DVC,DI SEMICOND DVC,DI

OVC.DK:SW,S1,30V,150MA,30V,W-35

OVC,DI:SW,SI,30V.150MA,30VVW-35

DVC,DI:SW,SI,30V,15M.V\,30V.DO-35

DVC,DI:SW,S1,3OV,lW,30V,DO-35

,30V, 150MA,30V, W-35

:SW,SI,30V,150MA,30V,W-35

WC,DI:SW,S1,30V,15OMCI,30V,W-35

OVC,DI :SW,SI .30V,150MA,30V,W-35

:SW.SI.30V,150MA,30V.W-35

DVC,DI:SW,S1,30V,15W,3OV,W-35

:SW,SI,30V,150MA,3OV,00-35

:SW,SI,30V,150MA,30VVW-35

SEMICOND DVC,DI :SW,GE.22V,80MW.W-7 SEMICOND DVC,DI :SCtiUTTKY .$I, 15V, 1.2PF, W-35

REV

HAR

1988

Replaceable Electrical Parts

7B53A

7053M7B53AN

CR617 152-0141-02 SEMICOND CR624 152-0141-02 SEMICOND DVC,DI :SW,SI ,30V,150MA,30V, W-35 CR629 152-0141 -02 SEMICON[] OVC,DI:SW, S1,30V,150MA,30V,W-35 CR635 152-0141-02 SMICOFID DVC,DI :SW,SI ,30V,15OMA,30V,W-35 CR641 152-0141-02 CR648 152-0141-02 SEMICOND DVC.DI :SW,SI ,30V, 15W,30V, 00-35

CR654 152-0075-00 8010100 8241889 SEMICOND DVC,DI :SW,GE,22V,80MW, DO-7 CR655 152-0141-02 5080ODD SEMICOND CR661 152-0141-02 SEMICOND CR662 152-0141-02 SEMICOND

CR677 152-0141-02 SEMICOND

CR678 152-0075-00 8010100 8241889 SEMICOND DVC,DI :SW,GEC22V,8W, W-7 CR678 152-0141-02 8241890 SEMICONO

8241889 SEMICOND OVC,DI:SW,GE,22V,8W,W-7

8241889 SEMICOND DVC.DI :SW,GE.22V.8WMjlWDO-7

0241889

SEMICOND

SEMICOND DVC,DI:SW,SI.lOOV,O. 13A,DO-92

SEMICOND

SEMICOND DVC.01

SEMICOND

SEMICOND DVC,DI :SW,SI,30V,lM,30V, W-35

SEMICOND

SEMICON0

SEMICOND

(7853A ONLY)

SEMICOND

(7853A MULY)

(7853A DNLY) SEMICOND

[

7853A ONLY

SEMICOND

(7853A ONLY)

SEMICOND

(7B53A ONLY)

DVC,DI:SW,SI,30V,lm,3W,W-35

DVC,DI:SW,SI,3OV,lSONA,30V,W-35

DVC.DI:SW,SI,30V,15MrlA,30V,DO-35

DVC,DI:SW,SI,30V,150M4,30V,DO-35

DVC.DI:SW,SI,30V,150M4,30V,W-35

DVC,DI:SW,SI,30V,150M4.30V,W-35

DVC,DI:SW,SI,30V,l50MA,30V,W-35

DVC,DI:SW,SI,30V,15M,30VVDO-35

:SW,SI,30V,l5OMA,30V,W-35

DVC,DI:SW,SI,3OV,150MA,3OV,DO-35 DVC,DI:SW,SI,3OV,15M,3OV,W-35

DVC.DI:SW,S1,30V,150Ed4,30V,00-35

DVC,DI:SW,SI,3OV,15MrlA,3OV,00-35 DVC,DI:SW,SI,30V,15MrlA,3OV,00-35 DVC.DI:SW,SI,30V,150MA,30V,00-35 DVC,DI:SW,SI,30V,15OM4,30V,DO-35

DVC,DI:SW,SI,30V,15MrlA,30V.W-35

DVC,DI:SW,SI,30V,150MA,30V,DO-35

DVC,

:SW,GE,

22~,8W, DO-7

DVC,DI:SW,SI,30V,1%50NR,30V,W-35

REV

MAR

1988

8241889

8241889 SEMICOND

5241889

SEMICONO WC,DI :SW,GE,22V,8Wr MI-7

(7B53A ONLY SEMICONO

(7B53A ONLY) SMICUND WC, DI : SW,GE, 22V,8W, 00-7

17B53A ONLY) SEMfCOND

(7853A ONLY)

(7853A ONLY) SEMICOND

(7B53A DNLY)

(7853A DNLY) SEMICONO

(7853A ONLY)

DVC,DI:SW,SI,30V,150M4,30V,W-35

DVC.DI:SW,S1,30V,150MA,30V,W-35

DVC,DI:SW,GE,22V,8W, DD-7 DVC,DI :SW,SI ,30V,15W,3OV, DO-35

DVC.DI :SW,GE,22V,8W, W-7

DVC.OI:SW,SI,30V,15OM4,3OVVDO-35 DVC,OI:SW,GE,22V,80MW,W-7

7853A ONLY

SEMICOND

(

7853A ONLY)

SEMlCONDOVC,DI:SW,GE,22V,EIW,W-7

(7853A ONLY)

SEMICm

(7853A ONLY

DVC,DI:SW,SI,30V,15W,30V,00-35

DVC,DI:SW,SI,30V,lW,30V,M-35

)

Rep1

7B53A

aceabl e Electrical

CM23 152-0075-00 BOlOlOO 8241889 CR923 152-0141-02 8241890

Parts

IB53W7BSAN

SEMICOND WC,DI :SW,GE,22V,8Wr DO-7

(7853A ONLY)

SEMICOFID

(7853A ONLY)

SMIMm

(7853A OIULY) SEMICOND (7WA ONLY) SMIW DVCSD1:SW,GE,22V,8W,W-7 (78538 ONLY) SEMICONO (7853A ONLY)

DVC,DI:SW,SI,3OV,15DMA,30V,

OVC,DI.:SW,GE,22\1,8W,W-7

DVC,DI:SW,S1,30V,15Wv30V,DO-35

DVC.D1::SW,SI.30V,15M,3OV,00-35

W-35

Wr,

14433

Mr.

PartXo,

6856

131-0955-00 131-0955-00

120-0382-00 1206382-00 120-0382-00 120-0382-00

276-0507-60 8010100 276-0507-00 BOlOlOO 8209999

108-0333-00 108-0333-00 151-0223-00 151-0223-00 151-0190-00

151-0220-00 151-0341-00 151-0341-00

151-0302-00 B05W

151-0341-00

151-0341-00 151-0341-00

151-0302-00 B050000 151-0220dt) 151-1042-00

151-0z21-00 Bola100 151-0220-00 B21m

BOlOlOO

lMlOl00

-----

@m99

W,fWD:%,0.06A,#683,AGED & SEL LT EMITTING DIO:GREEM,565M.t,35MA LT EMITTING DIO:GREEN,565FE1,20MA

LAMP,INCPND:5V,0.05A,#683.pAjED

SHLD

B&D,

(WIW

CM.RCPT,

ELEK:FmR14E

INSTALLED, TEST SELECTED)

ELEC:

BNC,

FWLE

SEL

CONM,RCPT.ELEC:BNCrF03ALE

COIL,RF:210U(.+~-4%t14 TUR@ COIL,RF:210UH,+i18%-4%. 14 TURNS COIL, RF: 21WH,+Z%-43%,

COIL.RF:21WH,+28"/S-4%e 14 TURNS

SHLD BEAD, ELEK: FERRITE

SHLO BEAD. ELEK: FERRITE COIL.RF: FIXED.881NH COIL,RF:FfXU),881NH TRANSISTOR: NPN , SI,62W, TO-92

TRANSISTOR:NPN.SI .62W.TO-92

TWSISTOR: PNP, $1, TO-92

TURNS

TRGNSISTOR:NPN,SI,TO-106

TWSISTOR:NPN,SI ,TO-106 TRANSISTMI:MPM,SI ,TO-@ TRAMS 'ISTOR : NPN. TRANSISTOR:NPM,SI ,TO-106

TWSISTW:NPN,SI ,TO-106 TWSISTOR:NPN,SI ,TO018 TRANSISTDR:PNP,SI ,TO-92 SEMICOND DVC SE:FET,SI ,TO-92

(PART

TWISTOR: PNP,SI ,TO%? TWSISTOR: PNP,SI ,TO-92

9310)

TO-106

W4 683AS15 58361 QWOJW5274C 50434 HLMP 1503

04713 SPS6919 04713 ST899

04713 80W 151-0221-00

80W 151-0220-00

683AS15

276-0543-

151 -0220-00

SPF627R

151-0367-00 BOlOlOO 151-0223-00 B21OM30 151-0367-00 BO101OO 151-0223-00 8210000 151-0199-04 B2100 151-0199-04 8210000

151-0223-00 151-0223-00 BOlOlOO 151-0188-00 BOlOlOO 151-1542-00

151-0221-00 BOlOlOO 151-0220-00

151-0367-60 B0lOi00 151-0223-00

azlowo

---"-

821m

821W

TRANSISTOR:NPN,SI,X-55 TRANSISTOR:NPN,SI ,62W,TD.92 TRGNSISTW:NPn,SI ,X-55 TRANSISTOR:NPN,SI ,62W,TO-92 TRANSISTOR: PNP , SI , TO-92 TRANSISTOR:PNP,SI ,TO-92

TWSISTOR: NPN, TRAMS1 STOR: NPN, SI ,62%W,TD-92 TRPNSISTOR: PNP,SI ,TO-92 SmIillCONO DVC SE:FET ,SI ,TO-92

(PART

WSISTOR:PNP,SI ,TO-92 TWSISTOR:PNP,SI ,TO-92

TRAPISISTOR:NPN, SI ,X-55

Q410)

Sf,

62W.TO-92

TWSISTOR:NPN,SI,62W,10-92

04713 SPS 04713 SPS8026 04713 SPS 8811 04713 80009 151-0199-04 80009 151-0199-04

04713 04713 SPS8026 80009 151-0188-00 04713

809 151-0221-00 80009 151-0220-00

04713 04713

8311

SPS8026

SPF627NZ

SPS 8811 SPS8026

REV

MPSl

1988

Replaceabf

7B53A

Electrical

Parts

7853MS853AN

No.

TRANSISTDR:NPN,SI,X-55 TRANSISTOR:NPN,Sf ,62W,TD-92 04713 SPS8026

TRANSISTOR:PNP,SI ,TO-92 TRANSISTOR:PNP,SI ,TO-92 TRANSISTOR:NPN,SI ,TO-92 TRANSISTOR:NPN, SI ,62W,TO-92 04713 SPS8026

TRANSISTOR:NPN,SI ,62M,TO-92 04713 SPS8026 TWSISTOR:PNP,SI ,TO-92 TRANSISTOR: TRANSISTOR TRANSISTOR: TRANSISTOR:

TRANS1STOR:NPN ,SI , TO-92 TRANSISTMI:W,SI ,625iidW.TO-92 04713 SF'S8026 TRANSISTOR: NPN ,SI , 62W. TO-92 04713 SPS8026 TRANSISTOR: NPN, SI , TO-92 TRANSISTOR: NPN, SI TRANSISTOR:

TWSISTOR: TRANSISTOR: TRANSISTOR:PNP,SI ,TO-92

PNP, S1,TO-92

NPN , SI , TO-92

PNP,SI .TO-18

PNP,SI ,TO-92

TO-92

PNP,SI ,TO-92 PNP,Sf ,TO-92

PNP, $1 ,TO-92

TRANSISTOR:E-ET,N-CHAN,SI,TO-106

TRANSISTOR:RT,N-CHAN,SI,TO-92

TRANSISTOR:NPN,SI ,625t.M.TO-92 04713 SPS8026

TRANSISTOR:NPN,SI ,629riW,TO-92 04713 SPS8026

TWSISTOR: NPN ,SI ,TO-92 8oM19 151-0190-00 TRANSISTOR: TRANSISTOR:NPN,SI , TO-92 04713 SPS8801 TRANSISTOR: NPN, SI , TO-92 80009 151-0190-00 TRANSISTOR:NPN, SI ,625iidW,TO-92

PNP,SI ,TO-92 80W 151-0221-00

04713 SPS 8811 80009 151-0199-04

80009 151-0199-04 80009 151-0190-00

8MX19

80009 151-0188-00 80009 151-0190-00 04713 ST898 80009 151-0221-00

80009 151-0190-00

80009 151-0190-00 80009 151-0190-00 80009 151-0188-00

80009 151-0220-00 80009 151-0220-00 80009 151-0221-00

04713 SPF3[134 04713 SPF3040

04713 SPS8026

151-0188-00

TRANSISTOR:NPN,SI ,62W,TO-92 04713 SPS8026

TRANSISTOR: PNP,SI ,TO-92 TRANSISTOR:PNP,SI .TO-92 TRANSISTOR: PNP,SI ,TO-92 TRANSISTOR:NPN, SI ,62W, TO-92 04713 SPS8026

TRANSISTOR:NPN,SI,625MW,TO-92

TRANSISTOR:PNP,SI,TO-92 TWSISTOR:PNP,SI ,TO-18 TRANSISTOR: NPN TRANSISTOR: TRANSISTOR: TRANSISTOR:PNP,SI,TO-92

TRANSISTOR: PNP,SI ,TO-92 TWSISTOR:PNP,SI,TO-92 TMSISTOR:NPN,SI ,TO-92 TRANSISTOR: TRANSISTOR:

TKANSISTOR:NPN,SI .TO-92

TRANSISTOR:NPN,SI ,TO-92 RES,FXD,FILM:499K W.r%.O.W,TC=TO 75042 CECTO-4993F RES,R(O,FILM:lOO ONM,%,0.2% 57668 NTR25.I-E l00E

RES.VM.NOW:PNL,lOK W,lW,W/SW 12697 381-W695

RES,VAR. NOW: PNL, IOK OM.

RES.VAR, NOW: PNL, 5K

Sf, TO-92 NPN,SI ,TO-106 NPN,SI , TO-106

NPN, SI , TO-92

PNP,SI ,R-124

OW,

la,

LINEAR.O.25W 12697 CM45205

1W ,W/SW 12697 381-(Xi9701

RES,VAR.NONWW:PNL,5KOH.1.1O%,LINEAR,0.9W

80009

80009 151-0221-00 80009 151-0220-00

04713 SPS8026

80009 151-0190-00

151-0221-00

12697 CM45204

REV

MsS(

1988

Replaceable Electrical Parts

7B53A

7B53A/7653AN

RES,VAR,W: (2)lK,i%,O-% RES.VAR.WW:TRMR,SOK OW.2W RES,FXD,FILM:47 OHM,5%,0.25W RES,FXD,FILM:4!3K OW,l%,O.l2.%,TC=TO RES,fXD,FIW:56.2K H,lX,O.l25W,TC=TO RES,FXD,FILM:47 OHM,%,0.25W

Mfr.

Part

NoLP'

CM45209

534-0070 NiR25J-E47EO CEAP45302F CM56201F NTRZEJ-E47EO

321-0158-00 BOlOlOO 8019999

RES,FXD,FILM:ZZOK OW,5%,0.25W RES,FXD,FIM:33K 0Me%,0.25W RES,FXD,FILM:lOO tKIM,S"k.0.2% RES,FXD,FILM:lOO OHM,5%,0.25W RESVFXD,FILM:499K DtfM,l%,O.5W,TC=TO RES,FXD,FIlM:100 OM,5%,0.25W

RES, FXD,FILM:53.6 OMM.i%,O. 12aJ.TC-TO RES,FXD,FILM:200 OIIM,1%,0.125W,TC=TO

(7B53A ONLY) RES,FWf,FILM:430 OIIM,5%.0,2%

(7853AN ONLY) RES,FXD,FILM:200 0~.1%.0.125W.TC=TO (78UAN ONLY)

RES,FXD,FILM:15.8 GI-1M,l%.O.l2W,TC=TO RES,FXD,FILM:24.9 W,1%,0.125W,TC=iI)

RES,FXD,FILM:365 GHM.1%,0.5W,TC=TO RES,FXD,FILM:15.8 W.l%,O.l25W,TC=TO RES,FXD,FILM:24.9 OIIM,l%,O.lZ%,TC=TO RES,FXD,FILM:53.6 0~.1%,0.125W.TC=TO RES,FXD,FILM:120 OW.5"A,0.25W

(7853A ONLY)

RES,R[O,FIM:120 Of(1"1,5%,0,25W

(7853AN ONLY)

RES,FXD,FILM:EOO OM,l%,O.l25W,TC=TO f7853A ONLY) RES,FXDVFILM:432 OWM,l%,O.f25W,TC=TO

(7B53AN ONLY)

RES,

FXD, FILM: 200

(7853AN ONLY

RES.E(D,FIU~~~~OO

RES, FXD, FILM:22K ONM. RES,FXD,FILM:2.87K 0~,1%,0.12%,TC~TO

OM,

ONM,5%,0.2%

i%,

0.125W.TC=TO

5%.

0.2%

NTR25J-E220K NTRZEJ-E33KO NTR25J-E l00E NTR25J-E lOOE CECTO-4993F NTR25J-E lOOE

NTR25J-E 1OOE 5043CX22KOOJ92U

CEAD 28700F

R64 315-0821-00 8010100 8209999 RES,R(D,FIM:@O OM,5%,0.2% 19701 5043CX820ROJ R64 315-0101-00 8210MlO RES,FXD,FILM:100 M#,5%,0.2% 57668 NTR2EJ-E lOOE R66 315-0101-00 RES,FXD,FILM:LOO OM,S"A,O.25W 57668 NfR25J-E 1OOE R67 315-0510-00 RES,FXD,FILM:51 Ot#,%,0.2% 19701 5043CX51ROOJ R68 315-0201-00 RES,FXO,FILM:200 01#,5%,0.25W 57668 R70 315-0101-00 RES.FXD,FILM:lOO 0i-W.5%,0.25W 57668 NIR25.l-E l00E

RES,VAR,NOW:TRMR,5K OWM,O.% 32997 3386F-T04-502 RES,FXD,FILM:23.2K 0#4.1%,0.125W,TC=TO 07716 CEAD23201F RES,FXD,FILM:1.50K W14,1%,0.125W,TC=TO 19701 5033R)11(50F RES,fXD,FILM:51 OHM,5%,0.2% 19701 5043CX51ROOJ RES,FXD,FILM:4.7K OM,YA,0.2% 57668 NTR25J-E04K7 RES,FXD,FILM:lOO OM,5%,0.25W 57668 N'TR25.l-E lOOE

R105 315-0103-00 RES,FXD,FILM:lOK W14,5%,0.2% 19701 5043~~10md1 R107 315-0623-00 RES,RD,FILM:62K OHM.5%,0.25W 19701 5043CX62KOOJ R109 315-0624-00 RES,FXD, FILM:62MC OM,5%,0.25W 19701 5043CX620KOJ RllO 325-0082-00 8010100 8160099 RES, FXO, FILM:33.51 MEG OM,O.l%,lW,TC=TZ 03888 PME75C335148

RllO

R112 325-0081-00 RES. FXD, FILM: 11.17 MEG

325-0082-03 8160100 RES,FXD,FIU.1:33.51M OI.iM,0.2%,IWrTC=T2 19647 K731 33.51M.25%

RES,MD.FILM:l1.17 MEG OW,O.l%,O.!%,TC=T9 03888 PME7011.17W.l RES, FXD,FIW:3.351 ME6 ~,0.1%.0.~,TT9 91637 MFFl-C335138

OWM,O.

1%,O. %,TC=T9 03888 PME7011.17MOEN.

R25J-E200E

REV

MAR

1988

Tektronix 7B53AN, 7B53A Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual