Tektronix 7B53A Manuale utente

Tektronix, Inc.

070-1252-00

TEKTRONIX®

INSTRUCTION

MANUAL

P.O. Box

500

Beaverton, Oregon

97005

772

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"T1!l!i!i:tmuil!lf."

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form without permission of Tektronix, Inc.

U.S.A. and foreign TEKTRONIX products covered

U.S.

and foreign patents and/or patents pending.

TEKTRONIX

a registered trademark

Tektronix, Inc.

7B53A/7B53AN Operators

TABLE

CONTENTS

Page Page

SECTION I OPERATING INSTRUCTIONS SECTION I OPERATING INSTRUCTIONS (cont)

7B53A/7B53AN Features

1-1

Applications 1-15

General

1-1

General 1-15

Installation

1-1

Comparison Measurement

Controls and Connectors 1-3 Techniques 1-15

Main Triggering Controls 1-3

Time

Duration Measurements 1-16

Sweep Controls 1-4 Determining Frequency 1-16

Delay

Time

Control 1-4 Risetime Measurements 1-17

Delayed Triggering Controls 1-4 Delayed Sweep Measurements 1-18

nput/Output

Connectors 1-4 Delayed Sweep Magnification 1-18

Operating

Checkout

1-4 Triggered Delayed Sweep

Introduction

1-4 Magnification 1-20

Setup

Procedure 1-4 Displaying Complex Signals

Sweep

Control

Functions 1-5 Using Delayed Sweep 1-20

Sweep Calibration (front-panel) 1-5 Pulse

Jitter

Measurements 1-21

Main and Delayed Triggering

Functions 1-6 SECTION

SPECI FICATlON

General Operating Instructions 1-7

Pushbutton

Switch Logic 1-7 Table 2-1, Electrical

2-1

Triggered Light 1-7 Main Sweep

2-1

Main Trigger Mode 1-7 Delayed Sweep

2-1

Main Triggering Coupling 1-8 Mixed Sweep, Variable Time Delay 2-2

Main Triggering Source 1-9 Amplifier 2-2

Trigger Slope 1-9 Main Triggering 2-3

Trigger Level 1-11 Delayed Triggering 2-4

Selecting Sweep Rates 1-11

Output

Signals 2-4

Time Measurement 1-12 Table 2-2, Environmental 2-5

Sweep Magnifier 1-12 Table 2-3, Physical 2-5

Display Modes 1-13

Delay

Time

Multiplier 1-13 NOTE

Delayed Sweep Triggering 1-14

Input/Output

Connectors 1-14 Refer to the

1853A/1853AN

Service Manual for circuit

X-V

Operation 1-14 description, maintenance, calibration, diagrams, and parts

Mainframe Operating Modes 1-15 replacement information.

7B53AnS53AN

Operators

-::;-..

iii

•

...

....

_-"

••

f'"

. .

---

DUAl.

fUIIl

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

• -

III

"Ii""

...

_nMl_

JlilA

_.:::.:=:.::::_..c

Fig

. 1·1.

7B5JA

and

7B5JAN

Dual Tim. B

ase

its.

Section 1-

7B53A

/7B53AN

OPERATING

INSTRUCTIONS

7B53A/7B53AN F

tures

7853A

and

7853AN

Dual

Time

Base

units provide

Main, Intensified, Delayed, and Mixed sweep

operation

for

TEKTRONIX

700

0·$eries Oscilloscopes. Calibrated sweep

rates trom 5

DIV

50 ns/DIV (5 nanoseconds wi

X10

magnification) and triggering to 1

megahertz are

provided. The

7853A

and

7853AN

are

electrica

lly

identical

except t

hat

only the 7B53A

compatible

with

alphanumeric readout system provided

for

7000-Seri

Oscilloscopes.

Other features include 0

10 times continuous sweep

delay.

riable main

and

delayed sweep rates,

and

variable

main

sweep

hold

off.

Separate triggering controls

are

provided for main and delayed sweep triggering, and w

hen

operating in the A

UTO

MAIN

TRI

GGERING

MODE,

bright

base

line is displayed in the absence

a trigger

r..

signal. The

7853A/7B53AN

can

also

used

an a

mplifier

for

X-V opera

tion

General

7853A/7853AN

operates

with

TEKTRONIX

7000·Series Oscilloscope

and

a 7A·Series

Ampl

ier unit

form

a complete o

sci

lloscope system. To effectively

use

the

7853A/7853AN

its operation

and

capab

ili

ties

uld

known

Thi

s section describes the operation of the

front

panel controls

and

nnector

provides

Operating

Checkout procedure, gives

gene

l operating

information,

and basic applications for this instrument.

Installa

tion

The

7853A/7853A

designed

operate in the

horizontal compartme

the indicator oscilloscope. This

instrument can also be installed in the

ical plug·in

compartment

ovide a sweep that runs vertically on the

CRT. However. when

used

in this manner, there

are

retra

blanking

internal triggering provisions.

and

the

unit

may n

meet the specifications given in Section 2.

The instructions in this manual

are

ritten

for

use

the

7B53A/7853AN

in the horizontal pl

-in compartment.

Befo

proceeding

with

installation

is necessary

check the settings

the Variable Selector

multi

-pin

nne

ctor

140)

and

the Delayed Sweep

Out

multi

connector (P613). T

Variable Selector

multi

pin connector (P140) determines whether the

·panel

VAR

ABLE

control varies main

sweep

rates, delayed sweep

rate

or main sweep

holdoff

; the

layed Sweep) Gate Out

multi

·pin connector

(P6t3)

determines whether the

Delayed Sweep Gate

Out

signal

connect

front

·panel

DLY'

TRIG

connector

(see

Fig. 1-3). Refer

General Operating Instructions in

section

for

VAR

ABLE

ntrol

and

OLY'D

OUT

form

ation.

install the

7B53A/7853AN

in a plug-in compart·

ment. push

until

fits

mly

into

the compartment.

The

Iront

panel

the

7B53A/7853AN

ould

flush

ith

the

front

panel

the indicator oscilloscope. E

ough the gain

the indicator oscilloscope

stand

dized

to minimize adjustment when inserting plug·in uni

, the

sweep calibration of the

7B53A/7B53AN

should be

checked wh

installed. The procedure f

checking the

unit

is given under Sweep Calibration in the Operating

Checkout procedure in this

sect

ion

To remove the

7B53A/7B53AN,

pull

the

release

latch

(see

Fig. 1-2)

disengage the

unit

from

the indicator

oscilloscope

and

pull

out

the plug·in compartment.

:t ...

,:;-

RELEASE

.••

~.,/

ATCH

....

r"'"

TRIG"

AMP

OlY

.....

7B53A

D_U_A_L_T_'_M_E

Fig. 1-2.

Loealion

releai18

atc

h. ,.,

Operating

ructions-7B53AnB53AN Ope

raton

VariatMe

Selector Connector

140

)

Delayed Gate

Out

Connector

(P6

13)

IPfi13)

• Aight Side

Instrument

Variable

OeI'Yed

S-.p

R,,"

--;it;r-

______Va

riabl.

Main

SWHp

Rates

Variable Main

S_pHoidoH

Left Side

Olln$lrument

Fig. 1·3.

01 Del.

yed

G."

Ind

V.dable

lect

mult

i-pin

connle,on

REV. APR

1974

1·2

®I

ArtekMedia

Digitally signed by ArtekMedia

DN: cn=ArtekMedia, o=ArtekMedia.com, ou, [email protected], c=US

Date: 2008.11.17 05:42:52 -06'00'

(i)

MAIN

TRIGGERING

CONTROLS

SWEEP

CONTROLS

DELAY

TIME

CONTROL

•

7B53A

Operating Instructions-

7B53AnB53AN

Operators

.....

'TfItGGl!a'.Q

.....

"11111

---

-• -

iii

:ol

DUAL

TlM£

eASIE

o OELAVED

TRIGGERING

CONTROLS

INPUT/OUTPUT

CONNECTORS

ig.

1-4. FrOnl...,

eonlrolland

connec

•.

CONTROLS ANO CONNECTORS

General

All

controls required for the operation

the

7853A/

7B53AN, except the Variable Select

and the Dly'd Sweep

Gate

Out

connector (see F

ig.

1·31. are located on the

ont

panel

the

instrument. To make full use

the capabilit

ies

of this instrument, the operator should be familiar with

the

function and use of each control. A brief description of the

front-panel co

ntr

ols and connec

tor

ive

n here. More

detailed information

given under General Operating

Inf

orma

tion. Fig. 1-4 shOVol$ the front panel and exter

nal

controls and connectors

the 7B53A/7B53AN.

1. Main Triggering

Controls

VEL. Selects

the

amplitude point on the trigger signal

where sweep triggering occurs.

SLO

. T

-position

swi

tch permits triggering on the

positive-going or negative-going

por

tion

the main trig.

gering s

ign

al.

TR IG'D. Lighl indicates that the main sweep

triggered

and will produce a display.

MODE

. Pushbutton switches select the operati

mode

for the main triggering circuit

UPLING. Pushbutton switches select the method of

coupling

the

triggering signal to the main triggering circuits.

SOURCE. Pushbutton switches

ect

the source of the

main triggering

sig

nal.

' ·3

Operating

Instructions-7853A/7853AN

Operators

2. Sweep

Controls

TIM

E/DIV

TIM

E. Selects the sweep rate

the

main sweep generator

(see

Fig. 1-7).

Y'D

Time/Division.

Selects

the

sweep rate

the

delayed sweep generator and selects

the

MAl

N SWP,

INTEN,

and

DLY'D

SWP

Display Modes

(see

Fig. 1-7).

VARIABLE.

Provides

continuously

variable main sweep

rates,

continuously

variable delayed sweep rates,

variable

main sweep

holdoff;

depending

the setting

the

Variable Selector

multi-pin

connector

(P140).

The

VARI-

ABLE

control

also selects the

MIXED

Display Mode

(see

Fig. 1-3, Fig. 1-7).

SWP

CAL.

Screwdriver

adjustment

match the gain

the 7

B53A/7B53AN

the

ind

icator

oscilloscope

for

calibrated sweep rates.

POSITION.

Controls

horizontal

position

display.

FI N

Provides precise

control

horizontal

position

adjustment.

MAG.

Pushbutton

switch

selects X 1

X 10

horizontal

magnification.

3. Delay

Time

Control

DELAY

TIME

MUL

Provides variable sweep delay

between

0.00

and 10.0 times

the

delay

time

indicated

the

TIME/DIV

DLY

TIME

switch.

4. Delayed Triggering

Controls

LEVEL.

Selects the RUNS

AFTER

DLY

TIME

Triggerable

After

Diy

Time

Modes, and the

amplitude

point

which

the delayed sweep

triggered.

SLOPE.

Two-position

switch

permits

triggering

the

positive-going

negative-going

portion

the delayed

triggering signal.

COUPLING.

Two-position

switch selects the method

coupling

the

triggering signal

the delayed triggering

circuits.

SOURCE.

Two-position

switch

select the source

the delayed triggering signal.

1-4

Input/Output

Connectors

MAIN

TRIG

AMP

IN.

Front-panel BNC connec-

tor

serving

external trigger

input

for

the

main

triggering

circuit

external

horizontal

input,

depending upon the setting

the

TIME/DIV

DLY

TIME

switch and

the

MAIN

TRIGGERING

SOURCE

switch.

Y'D

IN.

Front-panel BNC connector serving

external trigger

input

for

the delayed triggering

circuits

a delayed sweep gate

output;

depending

upon

the

DLY'D

TRIG

SOURCE

switch,

the

position

P613, and

the

DISPLAY

MODE.

OPERATING

CHECKOUT

Introduction

The

following

procedure checks the basic

operation

the

7B53A/7B53AN.

may also

used

for

familiarization

with

this

instrument

incoming inspection.

This

procedure

divided

into

two

parts, Sweep

Control

Functions,

and Main and Delayed Triggering Functions. A

complete operating check

the

7B53A/7B53AN

control

functions

can be made

perform

ing

both

parts,

each

part

may be performed separately.

NOTE

For

optimum

performance, the

1853A/1853AN

should

installed in

oscilloscope system with

similar frequency and sweep rate capabilities.

Setup Procedure

Install the 7

B53A/7

B53AN

in the

right

horizontal

compartment

the

ind

icator

oscilloscope.

Install a Vertical

Amplifier

unit

in the

left

vertical

compartment.

Turn

on the

indicator

oscilloscope and

allow

least

minutes

warmup.

4. Set

the

7B53A/7B53AN

controls

follows:

MAIN

TRIGGERING

SLOPE

MODE

COUPLING

SOURCE

(+)

AUTO

INT

DLY'D

TRIG

LEVEL

SLOPE

COUPLING

SOURCE

Sweep

Controls

POSITION

MAG

TIME/DIV

DLY

TIME

Y'D

Time/Division

VARIABLE

Variable Selector

DELAY

TIME

MUL

RUNS

AFTER

TIME

(fully

clockwise)

(+)

INT

Midrange

Xl-IN

1 ms

CAL

(fully

clockwise)

Main Variable

1.00

5. Set the

indicator

oscilloscope

display the plug-in

units

and adjust

for

well

defined

display.

See

ind

icator

oscilloscope

and

vertical un

instruction

manuals

for

detailed operating

instructions.

Sweep Control Functions

The

following

procedure checks the operation

the

sweep

controls

and

checks the Display Modes.

Normal Sweep

1. Perform steps one

through

five

the Setup

Procedure.

NOTE

The Time/Division

switch

selects main sweep rates,

delayed sweep rates,

and

Display Modes

(MAIN

SWP,

TEN,

Y'D

SWP,

and

MIXED).

Refer

Selecting Sweep Rates

and

Display Modes discussions

in the General Operating

Instructions

for

further

information.

select the

MAIN

SWP

Display

Mode,

press in the

Y'D

Time/Division

knob,

and set the

TIME/DIV

DLY

TIME

switch

and

the

DLY'D

Time/Division

switch

the

same

sweep rate

ms).

3. Connect the

one-kilohertz

calibrator

signal

from

the

ind icator oscilloscope

the vertical

amplifier

Input.

Adjust

the

Calibrator

and the vertical

Volts/Division

switch

for

four

divisions

display.

Rotate

the

MAIN

TRIGGERING

LEVEL

control

for

a stable

MAIN

SWP

display (non-delayed). Rotate the

DELAY

TIME

MUL

dial

and

note

that

has

effect

the display.

Operating

Instructions-7B53A/7B53AN

Operators

Rotate the

POSITION

control

and

note

that

horizontally

positions the trace. Rotate the FI NE

control

and note

that

provides precise

horizontal

positioning.

Disconnect the

calibrator

signal.

Sweep Calibration

NOTE

For

accurate sweep timing,

apply

a signal

known

frequency

time

period

(time-mark signal,

calibrator

square wave,

hertz

line

etc.)

the associated

vertical

amplifier

unit

and

adjust the

TlME/DIV

TIME

switch

and

the

SWP

CAL

control

calibrate the signal

the oscilloscope graticule.

sure

that

the sweep

timing

signal is accurate

within

0.5%. The

following

sweep

calibration

procedure

uses

TEKTRONIX

Time-Mark Generator.

6. Connect a 1 millisecond time-mark signal

from

the

Time-Mark

Generator

with

a 50-ohm BNC coaxial cable

and

50-ohm BNC

termination

the

Input

the associated

vertical

unit.

Adjust

the vertical

Volts/Div

switch

for

about

four

divisions

display

and

rotate

the

MAIN

TRIG-

GERING

LEVEL

control

for

a stable display. Check the

CRT

display

for

one

complete

time-mark

per division

(position

necessary). If necessary, adjust the

SWP

CAL

screwdriver adjustment

for

one complete time-mark per

division over the center eight divisions

display. Dis-

connect the

Time-Mark

Generator.

Intensified, Delayed,

and

Mixed Sweep

Reconnect the oscilloscope

Calibrator

signal

the

vertical

unit

and

adjust

for

about

four

divisions

vertical

display. Pull

out

the

Y'D

Time/Division

knob

and rotate

clockwise

ms/DIV

for

the I

NTEN

Display Mode

(TIME/DIV

DLY

TIME

switch remains at 1

ms/DIV).

Note

that

a delaying sweep

with

intensified

portion

(delayed sweep)

displayed on the

CRT

(the oscilloscope

ntensity

may

need

varied

view the intensified

display).

Rotate the

DELAY

TIME

MULT

dial

and

note

that

the amou

delay

time

before the intensified

portion

display

controlled

the

DELAY

TIME

MUL

dial.

Rotate

the

VARIABLE

control

counterclockwise

out

switch

detent

and

note

that

the sweep rate indicated

the

TIM

E/D

TIM

E switch can

varied

least

the

sweep rate

the

adjacent position

ms/DIV).

The

internal Variable Selector connector must be

set

for

variable main sweep rates. Return the

VARIABLE

control

the

CAL

position.

1-5

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