Tektronix PG 508 Manual de usuario

Otros manuales para PG 508

1

Tabla de contenidos

Otros manuales de Generador de pulsos de Tektronix

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Tektronix PSPL2600C Manual de usuario

Tektronix

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Tektronix 284 Manual de usuario

Tektronix

Tektronix PG 507 Manual de usuario

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Tektronix TYPE 109 Manual de usuario

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Tektronix TYPE R Manual de uso y cuidado

Tektronix

Tektronix SPG600 Manual de usuario

Tektronix

Tektronix PG 501 Manual de usuario

Tektronix

Tektronix PG 508 Manual de usuario

Tektronix

Tektronix TEK-DPG Manual de usuario

Tektronix

Tektronix SPG600 Manual de usuario

Tektronix

Tektronix PG 509 Manual de usuario

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1-1

I

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1-1

SECTIO

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4

BASIC

OPERATION

Pe

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and Dur

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1-2

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1-2

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1-4

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Instru

m

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t

Description

Th

eP

G

508

is

α

50

MH

z

ge

n

eral

pu

r

pose

full

fu

n

ction

pulse

generator

usable

in

all

TM

500-series

p

ower

modules

exce

p

t t

h

e

TM

501

.

It

is

co

m

p

atible

wit

h

M

OS

a

nd

ot

h

er

ge

n

eral

pu

r

p

ose

circ

u

itry

.

Im p

orta

n

t

featuresof

t

he

i

n

strume

n

t

include

indepen

d

ent

perio

d

and

d

uratio

n

con

trols

wit

hα

co

n

trol

error

lig

h

t,

inde

p

endent

pu

lse

to

p

and

bottom

level

co

n

trols,

varia

b

le

leading

an

d

trailing

t

r

ansitio

n

time

ad

j

ustme

n

ts,

an

d

f

u

lly

a

d

j

usta

b

le

pulse

d

elay

ca

p

abilities

.

F

ront

pa n

el

controls

a

nd

con

n

ectors

p

rovi

d

e

α

trigger

or

sync

h

ronous

gate

in

p

ut

wit

h

level

an

d

slope

controls,

square

wave

outp

ut

and

com

p

leme

n

tary

p

ulse

o

u

t

pu

t

for

h

ig

hduty

factors

.

Delaye

d

and p

aire

d

pu

lse

an d

man

u

al

trigger

or

gate

ca

p

abilities

are

also

provi

d

ed

.

All

i

n

p

uts

an

d

outp

uts

are

i

n

ter

n

ally

termi

nated

in

50

Ω

exce

p

t t

h

e

TRIG/GAT

E

i

np

ut

w

h

ic

h

is

internally

selecta

b

le

foreither

50

Ω

o

r 1

ΜΩ

,

20 pF

i

np

ut

impe

d

ance

.

Special

positio

ns

on

PER

IOD,

D

UR

ATIO

N

,

DE

L

AY,

an

d

TRA

N

SITIO

N

controls

p

ermit

customize

d

co n

trol

ranges

.

T

he

fro

n

t

p

a

n

el

is

color

code

d

for

easy

refere

nce

to

con

trols

a

n

d

t

h

eir

associated

f

u

nctio

ns

.

Gree

n

in

d

icates

triggeri

ng

fu

n

ctio

ns

an

d

blue

in

d

icates

mode

fu

n

ctio

ns

.

Installation

an

d

R

emoval

T

he

P

G

508

is

calibrated

an

d

ready

for

use

w

hen

received

.

It

operates

in

any two

com

p

artme

n

ts

of

t

he

ΤΜ

500-series

power

mod

u

les

.

See

t h

ep

ower

module

instruction

manual

for

li

ne

voltage

r

e

q

uireme

n

ts

a

nd

p

ower

module

o

p

eratio

n

.

F

ig

.

1-1

s

h

ows

t

he

installation

a

nd

r

e

m

oval

proce

d

ure

.

M

ake

certai

n

t

he

power

mo

d

ule

is

off

w

h

e

n

inserti

ng or

removing

t

he P

G

508

.

C

heck

t

h

att

h

e

P

G

508

is

fully

inserte

d

in

t

h

e

power

module

.

Pull

the

p

ower

switch

on

t

he

p

ower

mo

du

le

.

T

he

P

O

WER

lig

h

t

on

t

he

P

G

508

sh

o

u

ld

now

be

on

.

R

efe

r

to

t

he

Co

n

trols

and

Connectors

fol

d

o

u

t

page

i

n

Sectio

n

4

of

t

h

is

manual

for

α

com

p

lete

description

of

t

he

front

panel

controls

a

nd

co

nnectors

.

F

ig

.

1-1

.

PG

508

i

n

stallatio

na

nd

R

e

m

oval

.

Section

1---PG

508

Operating

In

st

r

uctio

n

s-PG

508

P

eriod

an

d

Du

r

ation

Selection

To

d

eter

m

i

n

e

t

h

e

custo

m

ca

p

acitor

val

ue

m

u

lti

p

ly

the

desi

r

ed

d

u

r

ation

o

r

d

elay

time

b

y

1

Χ

10-2

.

See

text

.

T

he p

erio

d ge

n

erato

r

ope

r

ates,

in

all

mo

des

exce

p

t

ΕΧΤ

TRIG

o

r

MAN,

at

α

rate

set

by

t

he

PER

IOD

ra

nge

switc

h

an

d

va

r

iable

co

n

t

r

ol

.

T

he

d

uratio

n

of

t

he output pulse

is

set

b

y

t

he

DURATION

r

ange

switc

h an

d

va

r

iable

control

.

Wh

en

t

he

DURATION

control

is

set

fo

r

αtime

greater

t

han

t

h

ePER

IOD,

t

h

e

CO

N

TRO

L

ERRO

R

lam

p

will

lig

h

t

.

Wh

en

t

he

D

UR

ATIO

N

co

n

trol

is

set

to

t

he

SQ

W

A

VE

positio

n

,

t

h

e

du

r

ation

time

is

d

ete

rm

i

ned

i

n

ternally

at

a

p

pr

oximately

50

ο/ο

of

t

he

p

erio

d

ti

m

e

.

T

h

e

custom

range

positio

ns on

t

he

PER

IOD

a

n

d

D

U

RATIO

N

controls

permit

u

ser-selecte

d pe

r

iod

a

nd

d

uratio

n

times

.

To

d

etermine

t

he

a

pp

roximate

ca

p

acitor

value

for

t

he d

esired

p

eriod,

multi

p

ly

t

h

e

p

e

r

io

d

time

in

seco

n

ds

b

y 5

Χ

10

-

' .

T

he

result

is

t

h

evalue

of

t

hecapacitor

i

nF

arads

.

F

or

example,

α

50

ms

p

e

r

io

d

times

5Χ

10

-'

eq

uals

250

Χ

10

-6

or

250

μ

F

.

T

h

is

capacitor

mustbe

non-

polarized

and

h

ave

at

least

α

6

V

r

ating

.

Solde

r

t

h

is

ca

p

acitor

i

n

t

he p

ositio

nsh

own

i

n F

ig

.

1-2

.

To

d

etermine

t

he

capacitor

value

for

t

he

d

uration

time

d

esire

d

,

multi

p

ly

t

h

e

duration

time by

1

Χ

10

-2

.

F

or

example

α

50

ms

duration

time

re

q

uires

50

ms

times

1

Χ

P

erio

d

;"AT

Ι

Ν

10

-2

or α

500

μ

F ca

p

acitor

.

If

α

p

olarize

d

ca

p

acitor

is

use

d

,

observe

t

he

correct

p

ola

r

ity

.

Use

at

least

α

6V

rated

cap

acitor

.

Co

nnect

t

h

is

cap

acitor as

sh

ow

n

i

n

F

ig

.

1-2

.

Duty

F

actors

Duty

factors

greater

t

han

t

h

ose

sp

ecifie

d are

ob-

taina

b

le

on

several

ranges

.

Wh

en

t

h

e du

ty

facto

r

is

inc

r

eased

to

t

h

e

point

t

h

at

i

n

ter

n

al

circuitry

pr

eve

n

ts

completio

n

of

t

h

e

pulse

waveform,

the

CO

N

TRO

L

ERRO

R

lig

h

t

will flas

h

.

To

furt

h

er

i

ncrease

t

he duty

factor,

switc

h

to

t

h

e

com

p

leme

n

t

m

od

e

.

Set

t

h

e

D

UR

ATIO

N

control

for

α

p

u

lse

wi

d

t

h e

q

ual

to

t

h

e

d

esire

d

p

ulse

off

time an

d

p

ush

t

h

e

fro

n

t

p

a

n

el

CO

MPLE

M

E

N

T

(--)

pus

hb

utton

:

Delaye

d

and

P

ai

r

ed

P

ulse

Selection

In

t

h

e

pu

lse

d

elay

mode,

t

h

e

outp

ut

pulse

is

d

elayed

from

t

h

e

+TRIG

O

UT

sig

n

al

by

t

he

D

EL

AY

time

selecte

d

plus

α

specifie

d

fixed

d

elay

.

In

t

he

P

AI

RE

D

mode

of

o

p

eratio

n

,

t

he delay

controls

t

h

e

time

betwee

n

t

he

lea

d

i

ng

edges

of

t

h

e

p

ai

r

ed

p

u

lses

.

To

use

this

feature

pus

h

t

h

e

D

ELAY

b

utto

n and

trigger

t

h

e

external

device from

t

h

e

+TRIG

OUT

j

ac

k

.

Set

t

he

DE

L

AY

control

for

t

he d

esi

r

e

d

delay time

from

trigger

to

p

ulse

leading

edge

.

Use

t

he

varia

b

le

co

n

trol

labeled

CA

L

fo

r

ti

m

e a

dj

ustme

n

ts

betwee

n

ste

p

s

o

r

to

increase

t

he

delay

times

beyo

n

d

t

he

steps

.

TRIG/GAT

E

IN

input

impedan

ce

switc

h

.

F

i

g

.

1-2

.

L

ocat

i

on

s

of

pe

r

io

d

,

d

elay

and

dur

atio

n

custom

timi

ng

ca

p

acito

rs

and

TRIG/GATE

IN

input

im

p

e

dan

ce

s

w

itc

h

.

R

emove

t

he

I

npu

t

b

oa

r

d

to

gai

n

access

to

t

he

d

elay

p

ads

.

REV

.

Α

,

A

PR

.

197

8

P

aired

pu

lses

are

obtai

ned

by

pus

h

i

ng both

t

h

e

D

EL

AY

and

UN

D

L

Y

b

u

ttons

.

An

initial

pulse

now

occurs

at

external

trigger

time

wit

h

t

he

secon

d

or

paire

d

p

ulse

delayed by

t

he

selected

delay time

.

The

CO

N

TRO

L

ERRO

R

lig

h

t

illuminates

if

t

h

ed

elay

is

toosh

ort

or

lo

ng

for

α

valid

p

ulse

train

.

Α

custom

d

elay

position

is

provi

de

d

on

t

h

e

DE

L

AY

switc

h

.

To

determine

t

h

e

val

ue

of

t

heca

p

acitor

require

d

,

multi

p

ly

t

h

e

desired

d

elay

time

i

n

seconds

by

1

Χ

10

-

Ζ

.

F

or

example,

α

50

ms

d

elay

time

re

q

uires

α

500

μ

F

ca

p

acitor

(50

ms

ti

m

es

1

Χ

10

-

Ζ

) .

U

se either

a

p

ola

r

ized

or

non-polarized

capacitor

wit

h

α

rati

n

g

of at

least

6

V

.

If

α

p

olarize

d

cap

acitor

is

u

sed,

observe

t

hep

olarity

mar

k

i

ngs

.

R

emove

t

he

i

np

ut

boar

d

and co nnect

t

he

capacitor

as

sh

ow

n

i

n F

ig

.

1-2

.

Transition

T

ime

Selectio

n

T

h

e

leadi

n

g

a

nd

traili

ng times

of

t

he p

ulses

may

be

varie

d

by

usi

n

g

t

he

TRA

N

SITIO

N

TIME

co

n

t

r

ol

an

d

t

he

LE

ADI

NG

a

nd

TRAI

L

I

N

G

va

r

iable

cont

r

ols

.

Select

t

he

desire

d

tra

n

sition

time

range

wit

h

t

he

TRA

N

SITIO

N

TIME

control

a

nd

vary

t

h

e

lea

d

i

ng and

traili

n

g

times

in-

d

epen

d

e

n

tly

wit

h

t

h

e

LE

ADI

N

G

an

d

TRAI

L

I

N

G

co

n

trols

.

Α

custo

m

range

position

is

also

provi

d

ed

on

t

h

e

TRA

N

SITIO

N

TIME

co n

trol

.

To

select

t

he

correct

capacitor

(i

n

F

arad

s)

for

this

ra

n

ge,

multi

p

ly

t

he

d

esire

d

transitio

n

ti

m

e

(in

seco

nd

s)

measured

from

10°/

ο

to

90°/

ο

poi

n

ts,

by 4

.4

Χ

10

-3

.

For

exa

mp

le,

α

d

esired

transitio

n

ti

m

e

of

50

ms

requires

αca

p

aciator

of

220

μ

F

.

Con

n

ect

t

he

capacitoras sh

ow

n

i

n

Fig

.

1-3

.

U

se

αcapacitor

wit

h

at

least

α

10

V

rating

and

observe

p

olarity

r

equirements

.

Wh

en

t

he

tra

n

sitio

n times

become

la

r

ge

com

pared

wit

h

the

duratio

n

or

perio

d times an

d

t

h

e

pu

lse

d

oes

n

ot

reac

h

full

amplit

u

d

e,

t

he

CO

N

T

R

O

L

ERR

O

R

lig

h

t

will

flas

h

i

n

dicati

ng imp

ro

p

er

control

settings

.

Output

L

evels

T

h

eo

u

t

pu

t

amplitude

and

offset

are

selected

b

y

i

n

depen

d

en

t

p

ulse

L

O

W

L

EV

E

L

and

H

IG

H LEV

E

L con-

trols

.

U

se

t

h

e

front

pa

n

el

voltage

calibratio

n

mar

k

s

fo

r

an

open

circuit

loa

d

an

d

divide

t

he values

b

y

two

w

h

en

t

h

e

P

G

508

is

o

p

erating

i

n

to

α50

Ω

loa

d

.

The

O

U

TP

U

T

(VOLTS)

co

n

trols

are

interloc

ke

d

to

pr

eve

n

t

setti

ng

t

h

e

H

IG

H

L

E

VEL

m

ore

negative

t

han

t

h

e

L

O

W

LE

V

E

L

. . .

It

is

also

im

p

ossible

to

set

t

h

e

co n

trols

for

more

t

han

about

20

Vp

ea

k

to

pea

k out

p

u

t

am

p

lit

ud

e

i

n

to

an

o

p

en

circuit

o

r

10

V

i

n

to

50

Ω

.

P

ulse

amplitud

e

always

e

qu

als

t

he pulse

h

ig

h

level

minus

t

he

pu

lse

low

level

.

Offset

may

be

t

he

h

ig

h

level

or

t

he

low

level,

w

h

ic

h

ever

is

used

as

t

h

e

base

li

n

e

refere

n

ce

level

.

The

flexi

b

ility

of

t

h

is

met

h

o

d

is

useful

i

n ce

r

tai

n

a

pp

licatio

ns

suc

h as

logic

testing

.

E

it

h

er

t

he

h

ig

h

or

low

level

can be

varied wit

h

out

disturbing

t

h

e

ot

h

er

.

REV

.

Β

,

A

PR

.

197

8

Operati

ng

Instructio

n

s-PG

508

To

determi

n

e

t

h

e

custom

ca

p

acito

r

value

m

u

lti

p

ly

t

he d

esired

d

ur

atio

n o

r

delay

time

by

1

Χ

10

-2

.

See

text

.

F

ig

.

1-3

.

L

ocatio

n

fo

r

tra

n

sitio

ncustom

timi

ng

capacito

r

.

T

he

p

ulse

h

ig

h an

d

low

levels

can

be

p

reset

.

Pu

sh the

PRESET

button a

nd

ad

ju st

t

h

e

HIGH

LE

V

EL and the

L

O

W

LE

VEL

poten

tiometers

wit

hα

screw

d

river

for

t

he

d

esired

outp

ut

levels

.

E

xte

rn

al

T

riggering

a

nd

Gati

ng

Το

change

t

h

e'

ΓΗΙ

G/G

ΑΤΕ

IN

i

nput

i

mp

edance

r

e

m

ove

t

h

e

plug-i

n

from

t

he

mainframe

.

R

emove

t

h

e

left

si

d

e

cover

.

Set

t

he

sli

de

switc

h

,

locate

d

on

t

he

I

np

ut

boa

r

d

and

labele

d

I

npu

t

Impe

dan

ce,

to

eit

h

er

t

h

e

50

Ω

o

r

the

1

ΜΩ

positio

n

.

In

t

he

1

ΜΩ

positio

n

t

h

e

shun

t

capacita

nce

is

approximately

20 pF

.

Α

stan

d

ar

d

oscilloscope

p

ro

be

can

be

use

d

to

ac

qu

i

r

e

t

he

triggeri

ng

sig

n

al

from

t

he

external

circuit

r

y

.

If

α

compe

nsated

probe

is

use

d

,

calibrate

t

he

p

r

obe

on

t

h

e

i

npu

t

of

α

1

MO

20

pF

oscillosco

pe

first

.

Α

10

Χ

p

ro

be

allows

t

r

iggeri

n

g

directly

from

h

ig

h

impeda

nce

sources

s

uch as

M

OS

d

igital

circuit

r

y

wit

h an

effective

TRIG/GATE

L

EVEL

range

of

+

:

.30

V

.

For

external

gating

select

t

he d

esire

d

p

erio

d

and

d

u r

atio

n

.

P

ress

t

he

SY

N

C

GATE

pus

hbutton

.

Select

t

he

d

esired

trigger

slo

p

e

w

it

h

t

he+

or

~-

S

L

O

PE

bu

tto

n

.

T

he

OUTPUT

now

co

n

sists

of

pu

lses,

d

escri

be

d

by

t

he

f

r

o

n

t

p

a

n

el

controls,

w

h

enever

t

h

e

TRIG/GATE

IN

inp

u

t

ex-

cee

ds

t

he

TRIG/GATE

L

EVEL

cont

r

ol

setting

.

To

exter

n

ally

t

r

igger

t

he P

G

508,

connect

t

he

t

r

iggeri

ng

sig

n

al

to

t

h

e

TRIG/GATE

IN

co

nnecto

r

.

Select

t

he

slo

p

e

on

w

h

ic

h

triggeri

n

g

is

d

esi

r

e

d

wit

h

t

h

e

+

or

---

S

L

O

PE

b

utton

.

P

lace

t

h

e P

ERIOD

switc

h

i

n

t

h

e

ΕΧΤ

T

RIG

O

R

MAN

position

.

Now

adjust

the

TRIG/GATE

LEVELcontrol

for

t

h

e

d

esired

triggering

level

.

'T

he output

waveform

commences

ab

o

u

t

48 ns

after

t

he

triggering

signal

.

Operating

Instructions-PG508

For

external

DURATION

place

the

DURATION

control

i

n

t

he

ΕΧΤ

D

UR

p

osition,

and

t

h

e

PER

IOD

co n

trol

in

t

h

e

ΕΧΤ

T

R

IG

O

R

MAN

position

.

T

h

e

pe

r

io

d

and d

uratio

n

of

t

he

out

p

ut

waveform

are

now

co

n

trolled

by

t

he

triggeri

n

g

waveform

.

T

h

is is

an

extremely

useful

mo

de

of

o

p

eration

for

tra

n

slati

ng

logic

levels,

etc

.

If

t

he

PER

IOD

is

set

for

inter

n

al

o

p

eratio

n and

t

he

D

UR

ATIO

N

for

exter

n

al,

t

he

CO

N

TRO

L

ERR

OR

lig

h

t

illumi

n

ates

in

d

icati

ng an

illegal

mo

d

e

of

operatio

n

.

Th

e

TRIG'D/GAT

E

D

in

d

icator

lig

h

t

functio

ns as α

TRIG/GATE

level

indicator

.

Wh

en

t

h

e-1-S

L

O

PE

is

selecte

d

and

t

h

e

exter

n

al

inp

u

t

level

excee

d

s

t

h

e

t

h

res

h

ol

d

set

by

t

he

T

R

IG/GATE

LEV

E

L co n

trol,

t

he

lig

h

t

is

on

continuous-

ly

.

F

or

i

npu

t

voltages

below

t

h

e

t

h

res

hold

t

h

e

lig

h

t

is

co

n

ti

nuously

off

.

Wh

en

t

he

i

n

p

ut

tra

n

sits

t

h

roug

h

t

h

e

t

hr

eshold

t

he

lig

h

t

flas

h

es

.

Wh

en

t

h

e-S

L

O

PE

is

selecte

d

t

he

lig

h

t

beh

aves

as

for

λ

-SL

O

PE

selectio

n

.

H

owever,

t

he

p

olarities

are

reversed

.

TheT

R

IG'D/GATTED

i

nd

icator

lig

h

t

may

be

used

as

α

logic

level

i

nd

icator

for

troubleshooting

logic

circuitry

.

Set

t

he

TRIG/GATE

LEV

E

L

,

co

n

trol to

α

voltage

e

q

ual

to

t

h

e

midra

n

ge

val

u

e

of

t

he

logic

voltage

swing

.

If

an

atte

nuator

probe

is

use

d

for

signal

p

ic

k

u

p

,

re

m

em

b

er to

consid

er

t

he

atte

nu

ation

factor

w

hen

setti

ng

t

he

TRIG/GATE

LE

VEL

voltage

.

Trigger

Out

p

ut

T

he

signal

a

pp

earing

at

t

he co nnector

is

an ap-

proximate

square

wave

.

T

he

leadi

n

g

edge

(positive-going)

Output

Termi

n

ations

and

Co

nn

ections

Th

eP

G

508

o

p

erates

as α

voltage

source

in

series

wit

h

an

i

n

ternal

50

Ω

im

ped

ance

.

M

aximum

p

ulse

fi

d

elity

is

obtai

ned

w

hen

t

he out

p

ut

op

erates

into

an

exter

n

al

50

Ω

impe

dance

.

The

out

p

ut

circuitry

of

t

h

e P

G

508

is

fully

p

rotecte

d

agai

n

st

any

voltage

transients

w

hen

o

p

erating

i

n

to

p

assive

loa

d

s

.

Table

1-1

lists

static

control

settings

t

h

at

illuminate

t

he

CO

N

TRO

L

ERR

OR

lig

h

t

a

nd

t

h

eir

corresponding

operati

n

g

modes

.

Some

of

t

h

ese

mo

d

es

may

be

u

seful

.

If

t

he

loa

d h

as

α

d

ovoltageacross

it,

co

nn

ect

α

b

loc

k

i

ng

capacitor

in

series

wit

h

t

h

e

O

U

TP

U

T

co

n

nector

an d

t

h

e

loa

d

.

M

ake

certain

t

h

e time con

sta

n

t

of

t

h

e

capacitor

and

load

is

large

enoug

h

to

mai

n

tain

pulse top

flatness

.

p

recedes

the

output

pulse

by

α

s

pecified

fixed

delay

p

lus

t

h

e

delay

as

set

by

t

he

D

EL

AY

control

.

In

paired

p

u

lse

o

p

eratio

n

,

t

he

lea

d

ing

e

d

ge

p

rece

d

es

t

he

first

p

u

lse

b

y

t

he

fixed

delay

.

T

he

seco

nd

p

ulse

t

he

n

appears

after

t

he

set

d

elay

.

Α

com

p

leme

n

t

sq

uare

wave

(

n

egative-goi

n

g

leadi

n

g

edge)

is

also

available

at

t

he

front

panel by

movi

n

g

α

con

n

ector

on

t

h

e

timing

circuit

board

.

See

t

he

illustra-

tio

n

on

t

h

eR

ear

I

n

terface

Co

n

necto

r

Assignme

n

ts at

t

h

e

rear of

t

h

is

man

u

al

for

t

h

e

locatio

n

of

t

h

is

co

n

nector

.

Manual

Trigger

To

use

t

h

is

featu

r

ep

lace

t

h

e

PER

IOD

switc

h

in

t

he

ΕΧΤ

TR

IG

OR

MAN

p

osition

.

Set

t

h

e

TRIG/GATE

LEVEL

control

fully

cloc

k

wise

.

If

t

he

+S

L

O

PE

is

selecte

d

,

t

he

ma

n

ual

trigger

will

occur

w

hen

t

he

MAN

button

is

d

epresse

d

.

If

t

h

e

--SL

O

PE

is

selecte

d

,

t

h

e

trigger

occ

u

rs

w

hen

t

h

e

butto

n

is

released

.

T

he

ma

n

ual

trigger

causes

o

n

e

out

p

ut

p

ulse,

or

α

set

of

paired pulses

if

t

he

D

EL

AY

a

nd

UN

D

L

Y

buttons

are

depresse

d

.

Control

E

rror

L

ig

h

t

T

h

e

CO

N

TR

O

L

ERR

O

R

lig

h

t

h

el

p

s

to

solve

set

up

pro

b

lems

by

i

n

dicati

ng

most

control

errors

.

Α

steadyglow

in

d

icates

static

co

n

trol setti

ng

errors

w

h

ile

α

flas

h

i

ng

lig

h

t

i

n

d

icates

d

y

n

amic

errors

.

In

eit

h

er

case,

t

h

e

control

settings

d

o

n

ot

co

r

rectly

i

nd

icate

t

he output

.

C

h

ec

k

t

he

co

n

t

r

ol setti

ngs

for

com

p

ati

b

ility

.

See

Table

1-1

.

Dynamic

fu

n

ctio

ns

monitore

d are p

erio

d

,

d

elay,

duratio

n an

d

tra

n

sitio

n time

.

T

AB

LE

1-1

Control

Setti

ngs



Operation

ΕΧΤ

TR

1G

Υ

O

R

ΜΑΝ

and~

ψ

---

SY

NC

GATE

ΕΧΤ

D

UR

and

Internal

P

eriod

ΕΧΤ

TRIG

O

R

MAN

and

SO

W

A

VE

(

ΙΝΤ

`

P

ERIOD)

SO

W

A

VE

(

ΙΝΤ

PE

R

IOD)

and

SY

NC

GATE

SO

W

A

VE

(

ΙΝΤ

PERIOD)

and

D

E

LAY

ΕΧΤ

D

UR

an

d

D

EL

AY

E

xter

n

al

Trigger

M

o

d

e

Square

W

ave

M

od

e

Truncated

s

q

uare

wave

w

h

en

gate

en

d

s

REV

.

Α

,

ΜΑΥ

,

197

6

R

iseti

ι

m

e

M

easurements

in

L

inear

Systems

Co

n

sider

t

he

r

ise

a

nd

falltime

of

associate

d

e

q

ui

p

me

n

t

w

h

en

meas

u

ri

ng

t

he

rise

or

fallti

m

e

of

α

li

neardevice

.

If

t

h

e

risetime

of

t

he

d

evice u

nd

er

test

is

at

least

ten

times

slower

t

han

t

he

combi

n

e

d

risetimes

of

t

h

eP

G

508,

t

he monitoring

oscillosco

p

e,

an

d

associate

d

cables,

t

he

error

introd

uced

will

n

ot

exceed

1

ο/ο

,

a

nd

u

sually

may

be

ig

nore

d

.

If

t

h

e

rise

or

falltime

of

t

h

e

test

d

evice

is

less

t

han

te

n

ti

m

es

slower

t

han

t

h

e

com

b

i

n

e

d

risetimes

of

t

h

e

testing

systems,

dete

r

mi ne

t

h

e

actu

al

risetime

of

t

he device

un

d

er

test

by

usi

n

g

t

he

followi

n

g

formula

:

R,

_=



U

R

Z



,

J-



R

z

z

-d

..

R2

.

. .

.

. . .

R,

eq

uals

t

h

e

overall

rise

or

falltime

of

t

h

e

entire

measu

r

e-

m

e

n

t

system

a

nd

R

i ,

R

2,

R,,

etc

.,

are

t

h

e

risetimes

or

falltimes

of

t

he

i

nd

ivi

d

ual

com

p

o

nen

ts

com

p

risi

ng

t

he

system

.

Extern

al

V

oltage

Co

n

trol

Th

e

h

ig

han d

low

level

output

voltages

can

be

con-

trolle

d

externally

t

h

roug

h p

i

ns

22

Β

an d

Α

at

t

he

rear

interface

conn

ector

.

F

ig

.

1-4

sh

ows

t

h

eeq

uivale

n

t

circ

u

it

.

Con

n

ectio

ns

must

be

made

fro

m

p

ad

Κ

to

padL

and

p

ad

Μ

to

pad

Ν

located

as

s

h

ow

n

on

t

he a

dj

ustment

locatio

n

illust

r

ation

in

t

h

e

fol

d

out

pages

at

t

he

rear

of

t

h

is

ma

n

ual

.

Use or

d

inary

h

oo

ku p

wire

of

t

he p

ro

p

er

le

n

gt

h

.

Solder

t

h

e

wire

to

t

h

e

pa

d

s

.

Also

n

ote

t

he

locatio

n

of

t

he

E

xt

H

i

and

E

xt

L

o

potentiomete

r

s

on

t

h

e

outp

ut

boar

d

.

To

u

se

t

h

is

feat

u

re,

set

t

he

f

r

o

n

t

p

an

el

co

n

trols

as

follows

:

d

epress

t

he

PRESET

button

(PRE

S

ET),

p

lace

t

h

e

PER

IOD

switc

h

in

t

he

ΕΧΤ

ΤR

Ι

GO

R

MAN

p

osition,

t

h

e

D

UR

ATIO

N

in

ΕΧΤ

D

UR

an

d

t

h

e

N

O

RMCO

MPL

E

M

EN

T

switch

i

n

t

h

e

N

O

RM

position

(out)

.

U

se

α

screw

d

river

to

ce

n

ter

t

h

eE

xt

H

i

and

t

h

e

p

reset

H

IG

H

LEVEL

co

n

trols

.

Supp

ly

α

voltage

to

t

h

e

external

h

ig

h

inp

u

t

(p

i

n 22

Β

on

t

h

e

rear

interface

co

nn

ecto

r )

equ

al

to

t

he lowest

external

i

nput

voltage

d

esired

(maximum

20 V)

.

~

12

Κ

j

Ι

E

xt

H

i

1

22Β

Ι

R

1234

Ι

Ι

E

xt

Lo

Ι

22

Α



Ι

R

1230



Ι

REV

.

Β

,

A

PR

.

197

7

Ι

R

1236

Ι

Ι

R

1232

~

Use

r

i

n

stalle

d

ju

m

pe

r

s

-

Ι

-5 .2

V

F

ig

.

1-4

.

Eq

uivale

n

t

ci

r

cu

it

of

exte

rn

al

i

npu

t

fo

r

ou

t

p

ut

voltage

control

.

O

pe

r

ati

ng

I

n

structio

n

s-

P

G

508

Now

a

dj

ust

t

h

e

fro

n

t

p

a

n

el

preset

HIG

H

LE

V

EL

control

for

an

OU

T

PU

T

voltage

eq

ual

to

t

he

minim

u

m

d

esire

d

ou

t

pu

t

voltage

.

It

may

be

necessary

to

a

dju

st

t

he

preset

L

O

W

LE

V

EL

co

n

trol

as

t

he

OU

TP

U

T

voltage

is

limite

d

to

20

V

pea

k

to

pea

k

o

pe

n

circuit

.

T

he

h

ig

h

level

O

UT

PU

T

voltage

is

clam

p

e

d by

t

h

e

low

level

O

UT

PU

T

voltage

if

t

h

is

r

an

ge

is

excee

de

d

.

Now

apply

α

voltage

eq

ual

to

t

he

h

ig

h

est

exter

n

al

co

n

trol

voltage desired

to

t

he

same

rear

i

n

terface

co

nnector

(pin

22

Β

)

.

Ad

j

ust

t

he

Ext

H

i

p

ote

n

-

tiometer

u

ntil

t

he h

ig

h

est

d

esired

o

u

tp

u

t

voltage

is

obtai

n

ed

.

It

may

be necessary

to

a

d

j

ust

t

he

preset

L

O

W

L

E

VEL

control

to

obtain

t

h

ed

esire

d

out

p

u

t

.

T

h

e

h

ig

h

level

OUTP

U

T

voltage cann

ot

go

below

t

he

low

level

OUTP

UT

voltage

d

ue

to

t

h

e

level

control

voltage

clam

ps

.

T

he

E

xt

H

i

an

d

t

h

ep

reset

HIG

H

LE

V

EL

controls

interact

.

It

may

be

n

ecessary

to

re

p

eat

the

above

p

rocedu

re

several

times

until

t

he

d

esired

results

are

obtai

n

e

d

.

Now

push

t

heN

O

RM CO

MP

LE

ME

NT

switc

h

(CO

MPL

E

ME

N

T)

.

Center

t

he Ext

L

o

an

d p

reset

L

O

W

LEVE

L potentiometers

.

S

upp

ly

α

voltage

to

p

in

22

Α

of

t

he

rear

interface

co

nn

ector

equal

to

t

he

lowest

exte

rn

al

control

voltage

desire

d

.

A

dj

ust

t

he

p

reset

L

O

W

LEV

E

L

control

for

an

O

U

TP

U

T

voltage

e

q

ual

to

t

h

e

lowest

OU

TP

U

T

voltage

desi

r

e

d

.

C

h

ange

t

h

is

voltage

to

t

he

h

ig

h

est

d

esired

exter

n

al

co

n

trol

voltage

.

Ad

j

ust

t

he

Ext

L

o

potentiometer

for

t

he

h

ig

h

est

O

U

T

PU

T

voltage

desire

d

.

As

t

h

ese

a

dj

ustments

i

n

teract,

read

j

ust

t

he

preset

L

O

W

LEVEL

and

t

he

E

xt

Lopotentiometers

for

t

he

desire

d

results

.

Do

n

ot

rea

dj

ust

t

he p

reset

HIG

H

LEV

EL

or

t

he E

xt

H

i

potentiometers

.

-

T

h

e

O

U

TP

U

T

voltages

now

vary

linearly

and

in

d

epe

nd

ently

wit

h

t

he

exter

n

al

co

n

trol

voltage

.

Cou

n

te

d

B

u

r

st

Using

t

he

DD

501

Digital

Delay

U

nit

Th

is

ap

p

licatio

n pe

r

mits

p

reselecti

ng

t

h

e

nu

mber

of

output

p

ulses

from

t

he

P

G

508

.

T

he even

t

is

i

n

itiate

dby

an

externally

a

pp

lie

d

sig

n

al

o

r

p

ulse,

5

n

s

or

lo

n

ger

.

T

h

e

time

duration

of

t

h

is

sig

n

al

or pulse

h

as

no

effect

on

t

he

output

fro

m

t

he

P

G

508

.

U

780B

H

ig

h L

evel

U

780A L

ow

L

evel

Pr

eset

H

IG

H

LEV

EL 8775

or

L

O

W

LE

VEL

R785

Operati

ng

I

n

str

u

ctions-

P

G

508

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.

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.

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, .

.

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Co

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f

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n

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ou

t

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r

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bu

rst

.

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ins

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a

nd

2 p

r

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d

tr

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r

out

.

F

ig

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1-5

.

L

ocatio

n

of

tr

igge

rj

um

pers

In

DD

501

f

o

r

selecti

n

g

t r

igge

r

o

r

d

elay

I

n

terval

ou

t

pu

t

.

F

ig

.

1-6

.

PG

508-DD

501

I

n

te

r

conn

ectio

n

s

fo

r

cou

n

te

d

bu

rst

ope

r

ation

.

τοαα

-

τ

9

E

xte

r

nal

t r

igger

sig

n

al

DD

501

D

LY'D

TR

IG

O

U

T

I

NPU

T

ζ

Ι



I

NPU

T

TR

IG/GAT

E

IN

ν

(

+T

R

IG

O

UT

P

G

508

Te

k

t r

onix

012-0208-00

o

r

e

qu

iv-

ale

n

t

coaxial

ca

b

le

te

n

i

n

c

h

es

o

r

s

h

o

r

te

r

in

le

ngth

2044-30

:

REV

.

Α

,

A

PR

.

1977