Tektronix LA 501 User manual

Tektronix

Inc.

P.O.

Box

500

Beaverton

Oregon

97077

070-2047-00

TEKTRONIX

501

LOGIC

ANALYZER

WITH

OPTIONS

OPERATORS

INSTRUCTION

MANUAL

Serial

Number

First

Printing

SEP

1975

WARRANTY

All

TEKTRONIX

instruments

are

warranted

against

defective

materials

and

workmanship

for

one

year

Any

questions

with

respect

the

warranty

should

taken

with

your

TEKTRONIX

Field

Engineer

representative

All

requests

for

repairs

and

replacement

parts

should

directed

the

TEKTRONIX

Field

Office

representative

your

area

This

will

assure

you

the

fastest

possible

service

Please

include

the

instrument

Type

Number

Part

Number

and

Serial

Number

with

all

requests

for

parts

service

Specifications

and

price

change

privileges

reserved

1975

Tektronix

Inc.

Beaverton

Oregon

Printed

the

United

States

America

All

rights

reserved

Contents

this

publication

may

not

reproduced

any

form

without

permission

Tektronix

Inc.

U.S.A.

and

foreign

TEKTRONIX

products

covered

U.S.

and

foreign

patents

and

patents

pending

TEKTRONIX

registered

trademark

Tektronix

Inc.

LIST

ILLUSTRATIONS

LIST

TABLES

SECTION

OPERATING

INSTRUCTIONS

500

SERIES

INSTRUMENTS

SAFETY

INFORMATION

Component

Replacement

Soldering

TABLE

CONTENTS

PAGE

Semiconductor

Replacement

FRONT

PANEL

CONTROLS

CONNECTORS

AND

INDICATORS

INTERNAL

CONNECTORS

AND

SWITCHES

1-1

Data

Input

Connector

1-1

Data

Output

Connector

1-1

1-4

1-5

1-6

1-7

1-8

1-9

1-10

External

Clock

Threshold

Switch

(

S848

)

Blanking

Polarity

Switch

(

S720

)

Display

Clock

Switch

(

S835

)

INSTALLATION

FUNCTIONAL

CHECK

1-1

Test

Equipment

Required

Preliminary

Set

Raster

Display

Functions

Trigger

Functions

DETAILED

OPERATING

INFORMATION

Signal

Connection

Display

Monitor

SECTION

(

CONT

)

Sample

Interval

External

Clock

Input

Threshold

Controls

Trigger

Controls

Format

Switches

Record

Controls

Monitor

Output

Signals

and

Controls

Data

Input

Signals

Data

Output

Connector

P300

Signal

Selector

Internal

Switches

501

GLOSSARY

APPLICATIONS

MICROPROCESSORS

STORAGE

BUFFERS

SECTION

SPECIFICATION

STANDARD

ACCESSORIES

RECOMMENDED

ACCESSORIES

SECTION

INSTRUMENT

OPTIONS

SECTION

BLOCK

DIAGRAM

ACCESSORIES

501

Operators

CHANGE

INFORMATION

PAGE

1-10

1-12

1-13

1-14

1-16

1-18

1-20

1-21

2-7

2-8

501

Operators

FIGURE

Frontis

piece

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8

LIST

ILLUSTRATIONS

501

Logic

Analyzer

Front

panel

controls

connectors

and

indicators

Location

internal

connectors

and

switches

501

installation

and

removal

Equipment

set

for

Functional

Check

501

and

monitor

and

signal

connections

for

Functional

Check

10X

probe

compensation

set

and

procedure

Location

EXT

CLOCK

polarity

selector

assignments

for

the

DATA

INPUT

connector

J100

PAGE

1-2

1-4

1-5

1-7

1-8

1-11

1-12

1-15

FIGURE

1-9

1-10

1-11

1-12

1-13

1-14

2-1

assignments

for

the

DATA

OUTPUT

connector

J120

Location

Signal

Selector

P300

and

P300

assignments

P300

jumper

placement

procedure

Internal

Switch

locations

and

switch

selection

positions

Typical

set

for

troubleshooting

microprocessor

system

with

the

501

Logic

Analyzer

Typical

set

and

display

for

trouble

shooting

storage

buffer

with

the

501

Logic

Analyzer

501

dimensional

drawing

PAGE

1-16

1-17

1-18

1-19

1-20

1-21

2-6

Ⓡ

●

TABLE

1-1

2-1

Format

Output

Levels

P300

Electrical

LIST

TABLES

PAGE

1-17

2-1

TABLE

2-2

2-3

Environmental

Physical

501

Operators

PAGE

2-6

iii

501

Operators

SAMPLE

INTERVAL

-IMS

20pF

(

10X

PROBE

ONLY

EXT

CLOCK

MONITOR

TEKTRONIX

100K

230p

EXT

TRIG

2018

THRESHOLD

1.4V

EXT

INPUT

VAR

20pF

10X

PROBE

ONLY

ECL

MONITOR

FORMAT

0-3

1024

0.7

512

20ns

MAX

0-15

256

50ms

MAX

TRIGGER

DATA

OUTPUT

TRIG

POST

CENTER

PRE

SLOPE

SOURCE

EXT

INPUTS

PROBE

BNC

RECORD

DISPLAY

TIME

MANUAL

BLANK

OUT

501

LOGIC

ANALYZER

CHANNEL

POSITION

SELECT

POSITION

OFF

MAG

POS

MAG

POS

(

NORM

)

VERT

OUT

(

NORM

)

HORIZ

OUT

DATA

INPUT

501

Features

The

501

Logic

Analyzer

designed

for

rapid

troubleshooting

digital

equipment

The

simultaneous

multi

channel

raster

can

displayed

almost

any

low

frequency

monitor

oscilloscope

The

4096

bit

memory

can

formatted

into

channels

1024

data

bits

channels

512

data

bits

channels

256

data

bits

for

wide

range

bit

serial

byte

serial

word

serial

data

The

flexible

external

(

synchronous

)

internal

(

asynchronous

)

sample

rate

clock

capability

will

accomodate

nearly

all

the

logic

family

speeds

use

Three

trigger

delay

modes

(

PRE

CENTER

and

POST

)

allows

selection

the

best

mode

for

the

application

Negative

trigger

delay

(

PRE

)

allows

analysis

the

sequence

events

that

precede

fault

trigger

Digital

data

outputs

provide

serial

parallel

format

loop

back

stored

data

computer

for

quick

error

checks

This

feature

allows

analysis

logging

data

while

viewing

can

used

without

display

device

Horizontal

and

vertical

magnification

with

positioning

provide

high

resolution

unique

vertical

positioning

system

allows

the

selection

and

positioning

any

one

trace

for

timing

comparisons

with

other

traces

the

raster

The

501

can

powered

any

500

series

power

module

which

has

three

unit

greater

capability

1967-1

OPERATING

INSTRUCTIONS

500

SERIES

INSTRUMENTS

The

501

Logic

Analyzer

member

Tektronix

growing

500

line

Test

and

Measurement

Instruments

This

product

line

consists

both

general-

and

special

purpose

instruments

such

digital

multimeters

counter

timers

variable

power

supplies

pulse

generators

function

gener

ators

calibration

sources

oscilloscopes

signal

processors

and

others

Each

instrument

plug

module

Power

module

mainframes

with

and

compartments

are

available

The

power

module

provides

power

and

overall

housing

for

the

plug

modules

and

permits

internal

signal

interconnections

between

plug

instruments

reduce

clutter

allow

two

instruments

perform

function

which

neither

could

perform

alone

Each

user

can

thus

select

from

broad

choice

instrumentation

assemble

multi

function

test

set

fit

his

needs

This

test

set

compact

and

portable

;

yet

can

quickly

recon

figured

exchanging

plug

instruments

when

test

needs

change

500

systems

can

configured

for

benchtop

rackmount

roll

about

and

portable

applications

For

information

the

500

line

please

contact

your

Tek

tronix

Field

Office

representative

SAFETY

INFORMATION

The

following

warnings

must

observed

during

maintenance

and

adjustment

the

501

Component

Replacement

avoid

electrical

shock

disconnect

the

501

from

the

power

source

before

replacing

components

Soldering

avoid

electrical

shock

disconnect

the

501

from

the

power

source

before

soldering

Semiconductor

Replacement

Semiconductors

that

have

heat

radiators

use

silicone

grease

increase

heat

transfer

When

one

these

semiconductors

replaced

the

silicone

grease

must

also

replaced

Handle

silicone

grease

with

care

Avoid

getting

silicone

grease

eyes

Wash

hands

thoroughly

after

use

FRONT

PANEL

CONTROLS

CONNECTORS

AND

INDICATORS

The

major

controls

and

connectors

for

operation

the

501

are

located

the

front

panel

Figure

1-1

shows

and

briefly

describes

the

front

panel

controls

connectors

Section

501

and

indicators

information

given

under

Detailed

Operating

Information

this

section

Several

connectors

and

switches

are

located

inside

the

501.

These

are

described

under

Internal

Connectors

and

Switches

this

section

INTERNAL

CONNECTORS

AND

SWITCHES

Figure

1-2

shows

the

location

the

internal

connectors

and

switches

brief

description

these

internal

functions

given

here

information

given

under

Detailed

Oper

ating

Information

this

section

Data

Input

Connector

Multi

connector

for

use

with

the

Data

Acquisition

Probe

provide

the

following

functions

DATA

INPUTS

Provides

input

for

each

the

channels

(

selected

when

the

front

panel

INPUTS

switch

the

PROBE

position

)

CLOCK

OUT

Provides

signal

output

from

the

internal

clock

INVALID

MODE

Provides

input

indicate

external

source

sample

interval

that

too

fast

for

the

selected

memory

format

(

selected

jumper

connector

P300

)

Data

Output

Connector

Multi

connector

with

the

following

functions

PARALLEL

DATA

OUTPUT

Provides

outputs

for

each

the

memory

channels

SERIAL

DATA

OUTPUT

Provides

output

for

serial

data

from

the

memory

FLAG

OUTPUT

Provides

output

that

indicates

the

start

each

channel

data

FORMAT

OUTPUT

Provides

output

that

indicates

memory

format

(

selected

jumper

connector

P300

)

1-1

Operating

Instructions

501

1-2

INPUT

SAMPLE

INTERVAL

20pF

10X

PROBE

ONLY

EXT

CLOCK

2000

2001

MONITOR

TEKTRONIX®

≈100K

230pf

EXT

TRIG

THRESHOLD

1.4V

THRESHOLD

200F

10X

PROBE

ONLY

VAR

TTL

ECL

INPUT

TRIGGER

MONITOR

FORMAT

0-3

1024

CH0-7

512

20m

MAX

0-15

258

500

MAX

DATA

OUTPUT

TRIG'D

POST

CENTER

PRE

SLOPE

SOURCE

INPUTS

EXT

PROBE

BNC

501

LOGIC

ANALYZER

RECORD

DISPLAY

TIME

MANUAL

10s

BLANK

OUT

CHANNEL

POSITION

SELECT

POSITION

MAG

POS

(

NORM

)

VERT

OUT

MAG

POS

(

NORM

)

Fig

1-1

Front

panel

controls

connectors

and

indicators

DATA

INPUT

X10

HORIZ

OUT

SAMPLE

INTERVAL

Switch

Selects

data

input

sample

interval

The

EXT

position

selects

input

from

the

EXT

CLOCK

connector

The

knob

skirt

lamp

blinks

when

the

sample

interval

too

fast

when

channel

record

format

THRESHOLD

Control

Provides

variable

threshold

voltage

level

for

data

input

channels

(

selected

VAR

switch

)

MONITOR

Jack

Provides

output

monitor

the

threshold

voltage

level

the

data

input

channels

VAR

Switch

Selects

the

variable

THRESHOLD

control

TTL

Switch

Selects

preset

data

input

threshold

voltage

level

for

TTL

logic

ECL

Switch

Selects

preset

data

input

threshold

voltage

level

for

negative

voltage

ECL

logic

(

)

TRIGGER

TRIG'D

Indicator

Lights

when

record

circuit

has

received

trigger

signal

POST

Switch

Selects

data

stored

after

the

trigger

CENTER

Switch

Selects

data

stored

before

and

after

the

trigger

PRE

Switch

Selects

data

stored

before

the

trigger

SLOPE

Switch

Selects

the

positive

negative

going

edge

the

record

trigger

signal

SOURCE

Switch

Selects

Channel

EXT

TRIG

connector

for

record

trigger

source

RECORD

DISPLAY

TIME

Control

variable

control

sets

the

time

which

memory

stored

data

will

held

for

display

before

new

record

cycle

begins

MANUAL

Switch

push

button

switch

which

resets

the

trigger

circuit

start

new

record

cycle

CHANNEL

POSITION

SELECT

Switch

Selects

any

channel

for

positioning

within

the

raster

POSITION

Control

Vertically

positions

channel

selected

SELECT

switch

Operating

Instructions

501

INPUTS

Switch

Selects

data

input

signals

from

through

front

panel

BNC

high

impedance

connectors

the

internal

low

impedance

DATA

INPUT

connector

BLANK

OUT

Connector

BNC

connector

for

output

crt

retrace

blanking

pulses

HORIZ

OUT

Connector

BNC

connector

for

output

horizontal

(

axis

)

display

signal

VERT

OUT

Connector

BNC

connector

for

output

axis

display

signal

MAG

POS

Controls

Provides

variable

vertical

magnification

(

)

and

vertical

positioning

the

displayed

raster

MAG

POS

Controls

Provides

variable

horizontal

magnification

(

X10

)

and

horizontal

positioning

the

displayed

raster

)

Through

Connectors

BNC

connectors

for

data

inputs

with

10X

probes

(

selected

INPUTS

switch

the

BNC

position

)

MONITOR

Probe

Tip

Connector

Provides

output

monitor

the

EXT

CLOCK

connector

when

compensating

high

impe

dance

10X

probes

(

)

EXT

CLOCK

Connector

BNC

connector

for

input

external

sampling

clock

signal

(

selected

SAMPLE

INTERVAL

switch

the

EXT

position

)

EXT

TRIG

Connector

BNC

connector

for

external

input

record

trigger

circuit

(

selected

SOURCE

switch

the

EXT

position

)

FORMAT

0-3

1024

Switch

Selects

channel

through

channel

for

data

recording

with

1024

bits

memory

per

channel

0-7

512

Switch

Selects

channel

through

channel

for

data

recording

with

512

bits

memory

per

channel

Maximum

sample

interval

nanoseconds

0-15

256

Switch

Selects

channel

through

channel

for

data

recording

with

256

bits

memory

per

channel

Maximum

sample

interval

nanoseconds

Fig

1-1

Front

panel

controls

connectors

and

indicators

(

Continued

)

1967-6

1-3

Operating

Instructions

501

BLANKING

POLARITY

SWITCH

S720

EXT

CLOCK

THRESHOLD

SWITCH

S848

DISPLAY

STORE

MODE

OUTPUT

Provides

output

indicate

whether

the

memory

Display

Store

Mode

(

selected

jumper

connector

P300

)

1-4

FRAME

OUTPUT

Provides

output

show

complete

memory

scan

when

reading

the

memory

serially

(

selected

jumper

connector

P300

)

DISPLAY

CLOCK

OUTPUT

Provides

ECL

level

clock

output

during

the

Display

Mode

(

selected

jumper

connec

tor

P300

)

AXIS

INPUT

Provides

input

intensify

crt

display

via

the

front

panel

BLANK

OUT

connector

DISPLAY

CLOCK

SWITCH

S835

Fig

1-2

Location

internal

connectors

and

switches

200

DATA

OUTPUT

CONNECTOR

DATA

INPUT

CONNECTOR

BOTTOM

UNIT

1967-12

RECORD

ENABLE

Provides

input

set

the

memory

into

Store

Mode

EXT

DISPLAY

CLOCK

INPUT

Provides

input

read

the

memory

with

external

clock

signal

(

ECL

level

)

External

Clock

Threshold

Switch

(

S848

)

ernal

Selects

the

external

clock

threshold

level

source

the

position

threshold

levels

are

selected

front

panel

INPUT

switches

VAR

TTL

ECL

the

down

position

fixed

ECL

threshold

level

selected

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