Tektronix 178 Manuel utilisateur

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1

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ι

ι

178

577

D

1

/D2

S

ERV

IC

E

W

A

RN

I

N

G

Teldfun

m

@

THE

F

O

LL

O

W

I

N

G

S

ERV

ICI

N

G

I

N

ST

RU

CTION

S

A

RE

F

O

R US

E

BYQ

U

A

L

I

F

I

E

D

PER

SO

NNEL

O

NL

Y

.

T

O A

V

OID

PER

SO

NA

L

I

NJUR

Y,

DO NOT

PERF

O

RM

ANY

S

ERV

ICI

N

G OT

HER

THAN

THAT

CO

N

TAI

NE

D

IN

O

PER

ATI

N

G

I

N

ST

RU

CTIONS

UNLESS

YO

U

A

RE

Q

U

A

L

I

F

I

E

D

TO

DOSO

.

COMMITTED

TO

E

XCELLENCE

PLE

AS

E

C

HE

C

K

F

O

R

C

H

A

N

G

E

I

NF

O

RM

ATIO

N

AT

THE

RE

AR

O

F

T

H

IS

M

A

NU

A

L

.

178

577

D1/D2

S

ERV

IC

E

I

N

ST

RU

CTIO

N

M

A

NU

A

L

Tektronix,

Inc

.

Ρ

.

Ο

.

Box

500

B

eaverton,

Oregon



97077



Serial

N

umber

070-1978-00



F

irst

Printing

SEP

1977

Product

Group

48



R

evised

APR

1985

Co

p

y

r

ig

h

t

f1977 Tek

tronix, Inc

.

All rig

h

ts

rese

r

ve

d

.

Contents

of

t

h

is

pub

licatio

n

may

not

be

re

produced

i

n

any

form

wit

h

out

t

he

written

permissio

n

of

Tek

tr

on

ix,

I

n

c

.

Products

of

Tek

tronix,

I

n

c

.

and

its

su

b

sidiaries

are

covered

by

U

.S

.

and

foreign

patents

an

d

/or

pen

d

ing

pate

nts

.

TEKT

R

O

N

IX,

ΤΕΚ

,

SCO

PE-M

OB

I

LE,

a

n

d



a

r

e

registe

r

ed

trademar

k s of

Te

k tronix,

Inc

.

T

ELE

Q

U

I

PMEN

T

is

α

registere

d

t

r

adema

rk of

Te

k

t r

onix

U

.

K

.

L

imited

.

Pr

i

n

ted

i

n

U

.S .A

.

Sp

ecification

an

d

price

ch

ange

p

r

ivileges

a

r

e

r

eserved

.

IN

ST

RUMEN

T

S

ER

IA

L

NUMBER

S

Eac

h

instrument

h

as

α

serial

n

um

b

er

on α

par)el

insert,

tag,

o

r

stampe

d

on

t

he

ch

assis

.

T

h

e

first

num

b

er

o

r

lette

r

d

esignates

t

he cou

ntry of

man

u

fact

ur

e

.

T

he

last

five

digits

of

t

h

e

serial

n

um

b

er

are

assigne

d

seq

u

entially

a

nd

are

u

n

i

que

to

eac

hinstru

m

e

n

t

.

T

h

ose

manufact

u re

d

in t

he

United

States

have

six

un

i

qu

e

digits

.

T

h

e cou

n

try

of

manufacture

is

i

d

entifie

d

as

follows

:

ΒΟΟΟΟΟΟ



Te

k

tro

n

ix,

I

n

c

.,

B

eaverto

n

,

Oregon,

USA

100000



Te

k

tro n

ix

G

u

er

n

sey,

Ltd

.,

C

h

ann

el

Islan

d

s

200000



Te

k

t r

o

n

ix

Un

ited

K

i

n

gdom,

L

td

.,

L

on

d

on

300000



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n

y/Te

k

t

r

o

n

ix,

J

ap

a

n

700000



Te

k

t

r

onix Hollan

d

,

NV,

Hee

r

e

n

vee

n

,

T

he Net

h erla n

ds

TABLE

OF

CONTENTS

P

age

SE

CTIO

N

1



S

PE

CI

F

ICATIO

N

1-1

SE

CTIO

N 2



O

PER

ATI

NG

I

NFO

R

M

ATIO

N



2-1

SE

CTIO

N

3



CI

RCU

IT

D

E

SC

R

I

P

TIO

N



3-1

SE

CTIO

N

4



M

AI

N

T

EN

A

NC

E

4-1

I

n

t

r

odu

ctio

n

4-1

PREVEN

TI

VE

M

AI

N

T

ENANC

E



4-1

Ge

n

eral



4-1

Clea

n

i

n

g



4-1

Lubr

icatio

n

4-1

V

isual

I

n

s

p

ection



4-1

T

r

a

n

sisto

r

s a

nd

I

nteg

r

ated

Ci

r

cu

its



4-1

R

ecal

ib

r

atio

n



4-1

TR

O

UBLE

S

H

OOTI

NG



4-2

I

n

t

r

odu

ction

4-2

T

r

ou

bles

h

ooti

n

g

Equ

i

pm

e

n

t



4-2

T

r

o

ub

les

h

ooti

n

g

Aids



4-2

Access

to

Ci

r

c

u

it

B

oa

rd

s



4-2

R

emovi

n

g

t

he

V

ertical

P

reamp

a

nd

F

ee

db

ac

k

Amplifie

r

B

oar

ds



4-4

Re

m

ovi

ng

and

R

e

p

laci

n

g

t

heF

ee

dbac

k

a

nd

V

ert

P

reamp

B

oar

ds

f

r

om

Cam-Switc

h

Assem

b

ly



4-6

Cam

Switc

h

R

e

p

ai

r

a

nd

R

e

p

laceme

n

t



4-6

R

e

m

oval of

Sto

r

age

Co

mp

art

m

en

t

S

h

iel

d

s



4-8

R

emoval

-

R

ig

h

t

Sh

iel

d

4=8

R

e

m

oval

-

L

eft

S

h

iel

d

4-8

R

e

p

lacement

of

Sto

r

age

Compartme

n

t

S

h

iel

d

-

L

eft

Si

de



4-9

R

e

p

lace

m

en

t

of

Sto

r

age

Comp

art

m

e

n

t

S

h

iel

d

-

R

ig

h

t

Si

d

e



4-10

SE

CTIO

N

5



PERF

O

RM

A

NC

E

CHEC

K

/AD

JUST

MEN

TPR

OC

ED

URE



5-1

I

n

tro

du

ctio

n

5-1

Services

Availa

b

le



5-1

Test

Equ

i

p

me

n

t

R

e

qu

i

r

ed



5-1

P

erfo

r

ma

n

ce

C

hec

k

5-2

A

dju

st

m

en

t

Pr

oce

dur

e



5-12

S

E

CTIO

N

6



REPL

AC

E

A

BLEELE

CT

R

ICA

L P

A

R

TS

SE

CTIO

N

7



SC

HEM

ATIC

DIAG

R

A

M

S &

CI

R

CU

IT

B

OA

R

D

I

LLU

ST

R

ATIO

N

S

SE

CTIO

N

Β



REPL

AC

E

A

BLE

ME

C

HAN

ICA

L P

A

R

TS

&

I

LLU

STR

ATIO

N

S

C

H

ANG

E

I

NF

O

RM

ATIO

N

178

Service

178

Service

Fig

.

1-1

.

178

Linear

Integrated

Circuit

Test

Fixture

.

SPECIFICATION

Sectio

n

1-178

Service

Int

r

od

u

ctio

n



Th

e

vertical d

eflectio

n

factor

switc

h h

as

28

positio

n

s

r

a

nging

fr

o

m

50

ρ

/Div

to

50

m/Div

(

un

mag

n

ifie

d

)

in

a

1-2-5

se

q

ue

nce

.

All

28

p

ositio

ns a

r

eu

se

d

for

cu

rre

n

t

T

he 178

L

i

nea

r

IC Test

F

ixtu

r

e

is

α

plug-in

device

for



m

easu

r

eme

n

ts,

b

ut

only

t

he

r

a

nge

f

r

om

10

μ

/Div

to

50

use

wit

h

t

he

577-D1

or

577-D2

Curve

T

r

ace

r

Syste

m

s

.

T

he



m

/Div

ca

nbe

use

d

fo

r

voltage

meas

u

reme

n

ts

.

Any

attem

p

t

577-178

combi

n

atio

n

,

wit

h

t

h

e

D1 Dis

p

lay

Un

it

module,

is



to

m

eas

ur

e voltage

u

si

n

g

vertical

d

eflectio

n

factors

less

design

ed

to

measu

r

e

t

hepa

r

a

m

ete

r

s

of

o

pe

r

atio

n

al



t

h

a

n10

μV

/Div

(

un

mag

n

ifie

d

)

ca

usest

heV

O

L

TS

indicator

am

p

lifiers,



com

p

arators,



d

iffere

n

tial



a

mp

lifie

r

s,



and



lig

h

t

to

t

u

r

n

off,

in

d

icati

n

g

an

u

nusab

le

switc

h

position

.

regulators

.

T

he

D2

Disp

lay

Un

it

may

be

use

d

,

but

lac

k

i

ng

d

is

p

lay

storage,

t

he

r

esults

may

n

ot

b

e

satisfactory

b

ecause

of

t

h

e

low

fre

q

ue

n

cies

n

ecessary

to

test

m

any



Vertical

d

eflection

factor

is

i

ncreasedby

te

n

w

hen

t

he

devices

.



V

ertical

P

OSITIO

N

Χ

10

VER

T

M

AG

kn

ob

on

t

he

577

is

pu

lle

d

to

t

h

eo

u

twa

rd

position

;

t

he

i

ncrease

is

in

d

icate

d

by

t

h

e

lamp

b

e

h

i

nd

t

h

e

VER

T

UN

ITS/DI

V

k

nob

sk

irt

.

T

h

is

The

178

L

i

near

IC

Test F

ixt

ur

e

feat

ures

α

swee

p

lam

p

also

tur

ns

off

if

an

u

nusable

switc

h

p

ositio

n

is

generato

r

,

p

ositive

a

nd

n

egative

s

upp

lies,

p

a

rt

of

t

he



selected

.

vertical

meas

u

ri

n

g

system, α

fee

db

ac

kloop

for

t

h

e

Device

Und

er

Test

(D

U

T),

a

nd

switc

h

i

n

g

ca

pa

b

ilities

to

facilitate

testi

ng

of

vario

u

s

paramete

r

s

und

er

d

iverse

co

nd

itio

ns

.



ΑFUN

CTIO

N

selecto

r

switc

h pr

ovi

d

es

eleven

test

p

ositio

ns

.

All

p

ositio

n

s

a

r

e

usef

u

l

to

test

o

p

e

r

atio

n

al

amplifie

r

s

.

T

he

swee

p

ge

n

erator

provi

d

es

α

varia

b

le

freq

u

e

n

cy,

0

.01

H

z

to

1

kH

z

sin

u

soi

d

al

o

u

tp

u

t

.

T

h

is

o

u

t

pu

t

is

use

d

to

force

t

he

D

U

T

o

u

t

pu

t

orthe

positive

a

nd

negative

su

p

p

lies



H

orizontal

deflection

facto

r

s

range

from

50

mV

/Div

to

(eit

he

r

in-p

h

ase

or

o

u

t-of-p

h

ase),

or

to

swee

p

t

he

D

U

T



200

V

/Div

(u

n

magnified),

a

nd

a

r

e

selecte

df

r

o

m

t

he

i

np

uts

.



CO

LLE

CTO

R

V

O

L

TS

seg

m

en

t

of

t

he

577

H

O

R

IZ

V

O

L

TS/DI

V

switc

h

.

The

do

voltage

levels

of

b

ot

h p

ositive

an

d

negative

su p

plies

are

i

nd

epen

d

en

tly

adju

sta

b

le

fr

om

0

to

30

volts

.

T

he

n

egative

s

upp

ly

am

p

lit

ude

can

b

e

m

ad

e

to

t

r

ack

(

h

ave

t

he

same

a

b

sol

u

te

val

ue

as)

t

h

ep

ositive

su

pp

ly

a

mp

litu

d

e

.

T

he

maxim

u

m

cu

r

r

e

n

t

ca

pa

b

ility

of

t

h

e

p

ositive

a

nd

n

egative

s

u

pplies

can

b

e

limite

d by

p

oten

tio

m

ete

r

s on

t

he

D

U

T

ca

rd

.

If

t

h

e

loa

d

c

u

r

r

en

t

atte

mp

ts

to

excee

d

t

h

e

set

li

m

its,

t

h

e

su

pply

cu

rre

n

t

limits

a

ndα

lam

p

fo

r

eac

h

sup

p

ly

i

n

dicates

t

h

e

co

nd

itio

n

.

Any

pair

(of

fo

u

r

p

airs)

of

i

n

te

rn

al

sou

r

ce

r

esistors

can

be

use

d

in

series

wit

h

t

he

am

p

lifie

r

i

np

uts

.

A

n

y

value

of

exte

rn

al

sou

r

ce

r

esista

nce

can

b

e

a

dd

ed

to

t

h

eDUT

ca

r

d

.

T

h

e

D

U

T

out

p

ut

can

be

loa

d

ed

wit

h

one

of

sevenvalues

of

inter

n

al

loa

d

r

esista

nce

.

Any

value of

exter

n

al

loa

d

resistance

can

b

e

a

d

de

d

to

t

h

eD

U

T

card

i

n

pa

r

allel

wit

h

t

he 50 k

Ω

of

r

esista

n

ce

pr

ovi

d

ed

on

t

h

e card

.

T

he

vertical

m

eas

u

rement

system

is

ca

p

able

of

measur-

i

n

g

eit

he

r

voltage

or

cu

rrent

.

T

h

ec

h

oice

of

voltage

or



T

he

store

d d

isplay

on

t

h

e

D1 Disp

lay

U

nit

is

erased

cu

rr

en

t

m

easu

reme

n

t

is

d

etermi

n

ed

by

t

he

p

ositio

n

of

t

he



w

h

e

neve

rt

he

FUN

CTIO

N

switch

is

changed

,

exce

p

t

w

hen

FUN

CTIO

N

switc

h

a

nd

is

i

nd

icated

by

t

h

e

AMP

S

or



switc

h

i

ng

b

etween

+I

NPUT

Ι

an

d

-I

NPU

T

Ι,

+

PS

RR

and

V

O

L

TS

lamp

.



-P

S

RR,

and

+S

UPPL

Y

Ι

a

nd

-S

UPPL

Y

Ι

.

T

he

Sta

nd

ard

Op

Am

pcar

d

can

b

e

u

sed

to

test

si

n

gle,

du

al,

andqua

d

ope

r

atio

n

al

am

p

lifiers

.

It

can

also

b

e

use

d

to

test

si

ngle a

nd du

al

comparators

an d d

ifferential

a

mp

lifiers

.

R

eg

u

lator

card

s

are

u

se

d

to

test

t

hr

ee-terminal

reg

u

lator

p

arameters

.

T

hese

r

eg

u

lator

cards

a

r

e

optio

n

al

accesso

r

ies

a

nd

a

r

e

cove

r

ed

on

se

p

arate

d

ata

sh

eets

.

IC

soc

k

et-

p

in

config

u

rations

m

u

st

be

connecte

d

to

t

hecards

b

y

u

si

nga

da

p

ter

soc

k

ets

an

d p

atc

h

co

r

ds

.

An

offset

Z

ER

O

bu

tto

n

provides

αzero

crt

display

reference

an

d n

ulls

offset

voltage

fo

r

certai

n

m

easu

r

e

m

en

ts

t

h

at

would

ot

he

r

wise

be

off

sc

r

een

.

Offset

is

usually

r

eset

auto

m

atically

w

h

en

t

h

e

setti

ng

of

t

he

FUN

CTIO

N

switc

h

is

chan

ge

d

.

Offset

must

b

e

r

eset

ma

n

ually

w

hen

switc

h

i

n

g

b

etwee

n

1

a

nd

.5

mV

/DI

V

a

nd

betwee

n

.1

mV

and

50

μ

V

/DI

V

.

S

p

ecification-178

Service

The

elect

r

ical

cha

r

acteristics

i

n

t

he

followi

n

g

table

are



Items

listed in

t

h

eP

erfo

r

ma

nce

R

eq

u

ire

m

e

n

ts

col

u

mn

vali

d

only

if

t

h

e

i

n

str

u

ment

h

as b

ee

n

calibrated

at

an



of

t

he E

lect

r

ical

C

ha

r

acte

r

istics

are

verifie

d

by

com

p

leting

am

b

ie

n

t

tem

pe

r

at

ur

e

b

etween

+20°

C

an d

+30°

C,

and

t

he



t

h

eP

erformance

C

h

ec

k

i

n

t

h

is

ma

nu

al

.

Items

liste

d

in

t

he

i

n

st

r

ume

n

t



is



o

p

erati

n

g

at

an



am

b

ient

tem

p

erature



S

upp

leme

n

tal

I

n

fo

rm

atio

n

column

a

r

e

n

ot

ve

r

ifie

d

in

t

h

is

b

etwee

n

O'

C

a

nd

+50

0

C

(

u

nless

ot

herwise

n

ote

d

)

.



m

a

nu

al

;

t

hey are

eit

h

e

r

exp

la

n

atory

notes o

r

pe

r

forma

nce

ch

aracteristics

fo

r

w

h

ic

h

no

limits

are s

p

ecifie

d

.

V

ertical

Deflection

Facto

r

s

I

npu

t

C

u

rrent

(

Ιη



50 ρΑ

/DI

V

to

.2

mA/DI

V

i

nα

1-2-5

se

+I

np

ut

Ι

a

nd -Inp

u

t

Ι



q

ue

n

ce,

u

nm

ag

n

ifie

d

.

F

un

ctio

n

s

Accu

r

acy'

V

oltage"

C

h

aracteristic

C

MRR

Fun

ction

Accu

r

acy

PS

RR

Fu

nctio

n

Accuracy

Ta

b

le

1-1

ELE

CT

R

ICA

L

C

HA

R

ACT

ER

ISTICS

P

erformance

R

e

q

ui

r

eme

n

t

5

ρΑ

/DI

V

to

20

μΑ

/DI

V

wit

h

10

Χ

m

ag

n

ifier

on

.

W

it

h

in

t3°/

ο

±50

ρΑ

,

u

n

mag

n

ified

.

W

it

h

i

n

t4°/

ο

±50

ρΑ

w

it

h

10

Χ

m

ag

n

ifie

r

on

.

10

μ

V

/DI

V

to

50

m

V

/DI

V

i

n

α

1-2-5

se-

quen

ce,

un

mag

n

ified

.

1

μV

/DI

V

to

5

mV

/DI

V

with 10

Χ

mag

n

ifier

on

.

GAI

Na

nd

O

FF

S

ET

V



W

it

h

i

n

f3°/

ο

,

u

nmag

n

ified

;

f4°1

ο

wit

h 10

Χ

F

un

ctions

Acc

ur

acy'



~

m

ag

n

ifie

r

on

.

Within

±3°

k

+



G~

ΟΟΚ

Κ



%+150

μ

V

Ν

.

Within

±4°/

ο

+



G

αΊη

0

Κ

Κ



°

ο

±

1

Κ

μ

V

Ν

,

.

wit

h10

Χ

m

ag

n

ifier

on

(1

μV

/DI

V

to

5

μV

/DI

V

,

see

foot

n

otes

b

a

nd

ε

)

.

W

it

h

i

n

t3°/

ο

+



100

Κ



°/

ο

Gain

-

Κ

W

it

h

i

n

t4°/

ο

+



100

Κ



%

with

10

Χ

Gai

n

-

Κ

mag

n

ifie

r

on

(1

μV

/DI

V

to

5

μ

V

/DI

V

;

See

foot

n

otes

b

an

d

ε

)

.

'Acc

ur

acies

a r

e

t

he

h

ig

h

est

p

erce

n

tage of

on-screen

val

u

es

.

'V

ertical

m

ag

n

i

ficatio

n

is

not

r

eco

mm

ended

fo

r

.5

m

V

/DI

V

t

hr

oug

h

50

mV

/DI

V

unmag

n

ifle

d

setti

n

gs

.

S

u

p

p

le

m

e

n

tal

I

n

fo

rm

atio

n

`D

U

T

gai

n

w

it

hs

m

all

voltage

sig

n

al

o

u

t

n

ea

r

ze

r

o

wit

h50 k

Ω

loa

d

:

Κ

=10

f

o

r

50

m

V

/Div

to

1

m

V

/Div,

Κ

=100

fo

r

.5

m

V/D

i

v

to

100

μ

/Div,

and

Κ

=1000

fo

r

50

μV

/Div

to

10

μV

/Div

.

V

c

m

=Common-

mode

voltage

.

Cu

rr

en

t

V

oltage

Cu

rr

en

t

Am

p

lit

ude

C

h

aracte

r

istic

P

owe

r

Supp

ly

Cu

rr

en

t

Curre

n

t

M

od

e

Accuracy'

Collector

Su

pply

Curre

n

t

M

od

e

Acc

ur

acy'

P

ositive

a

nd

N

egative

S

u

p

p

lies

Accu

r

acy

Swee

p

Ge

ne

r

ato

r

Fr

eq

ue

n

cy

Accuracy

In

O

FF

SE

TAN

D

GAI

N

Fun

ctio

ns

Commo

n

-mo

d

e

V

olt-

age

i

n

INPU

T

Ι

an

d

C

MRR

Fun

ctions

P

owe

r

Supp

ly

V

olt-

age

i

n P

S

RR

a

nd

S

UPPL

Y

Ι

F

u

n

ctions

Manual

Swee

p

At

least

150

mA

P

erfo

r

ma

n

ce

R

e

qu

ireme

n

t

1

ηΑ

/DI

V

to

50

mA/DI

V

in

α

1-2-5

se-

qu

e

n

ce,

unmagnified

.

0

.1

ηΑ

/DI

V

to

5

mA/DI

V

wit

h 10

Χ

mag

n

ifier

on

.

W

it

h

in

t3°/

ο

t1

ηΑ

u

n

mag

n

ifie

d

;

+4

ο/ο

t1

ηΑ

wit

h

10

Χ

mag

n

ifie

r

on

.

1

ηΑ

/DI

V

to

50

mA/DI

V

in

α

1-2-5

se-

qu

en

ce,

u

nmagnifie

d

.

0

.1

ηΑ

/DI

V

to

5

mA/DI

V

wit

h

10

Χ

magnifier

on

.

W

it

h

i

n

±3°

k

t1

ηΑ

,

u

nmagnified

.

±4%

t1 ηΑ

wit

h 10

Χ

m

ag

n

ifie

r

on

.

A

dju sta

b

le

from

0

to

30

V

.

W

it

h

i

n

t2°/

ο

±100

mV

.

0

.1

Hz

to

1

kH

z, si

n

usoi

d

al

sig

n

al

.

F

ive

r

an

ges,

0

.1,

1,

10,

100,

and

1000

H

z

wit

h

Χ

.1

to

Χ

1

va

r

iable

.

Wit

h

i

nt5°/

ο

in cali

br

ate

d

(

Χ

1)

positio

n

.

0

V

to

30

V

t3°/

ο

maximu

m

peak

.

In

t

h

e

1

m

V

/DI

V

to

50

m

V

/DI

V

ranges,

t

he

values

a

r

e 10

ο

/

ο

lowe

r

.

'Accu

r

acies

a

r

e

t

he

h

ig

h

est

pe

r

cen

tage

of

on-screen

val

u

es

.

Ta

b

le

1-1

(co

n

t)

ELE

CT

R

ICA

L

C

H

A

R

ACT

ER

ISTICS

S

p

ecificatio

n

-178

Se

r

vice

Su

pp

le

m

e

n

tal

I

n

format

i

on

B

ot

h

s

upp

lies

εαη

b

e

a

dju ste

d

from

t

he

+SUPPL

Y

co

n

tr

ol

.

N

egative

su

p

p

ly

can

be

in

d

epen

d

ently

a

dju

sted

usi

n

g

t

he υη

-

cali

b

rate

d

-SUPPL

Y

cont

r

ol

.

T

h

e-S

UPPL

Y

voltage

is

wit

h

i

n

f1

ο/ο

(abso-

l

u

te)

of

the

+S

UPPL

Y

voltage

w

hen

t

he

-SUPPL

Y

co

n

t

r

ol

is

i

n

t

h

eTR

AC

K

+S

UPPL

Y

position

.

Ad

j

ustable

cu

rr

e

n

t

limiti

ng

.

Ra

n

ges

overla

p

at

Χ

.1

en

d

of

va

r

ia

b

le

.

A

dju sta

b

le

from

O

V

to

30

V

t3°/

ο

maxi

m

u

m

Ad

j

ustable,

de

p

en

ds

on

f

un

ction

.

T

he

voltage

pea

k



s

hould be

limited

to

t

h

e

out

p

ut

cap

ability

of

t

he

D

U

T

.

L

imite

d

to

t

he

powe

r

s

u

pply

voltages

(clip

pe

d

)

See

P

ositive

and

N

egative

Su

pplies

T

he

Ge

n

eratoro

u

t

pu

t

may

b

e

man

u

ally

set

to

any

do

level

(

un

cali

b

rate

d

)

wit

h

i

n

its

ampli-

t

ud

e

range

(

d

epen ds

on

t

he

setti

ng

of

t

he

FUN

CTIO

N

switc

h

) .

Sp

ec

i

ficat

i

on-178

Service

Ta

b

le

1-1

(co

n

t)

ELE

CT

R

ICA

L

C

HAR

ACT

ER

ISTICS

C

ha

r

acteristics



P

erforma

n

ce

R

eq

uire

m

en

t



S

upp

le

m

e

n

tal

Info

r

mat

i

on

So

u

rce

R

esista

nce

R

esista

n

ces



I



I



F

ou

r

p

ai

r

s

;

50

Ω

,10 k

Ω

,

20

k

Ω

,

a

n

d

50

k

Ω

.

Tolerance



Ι



Ι

f1°/

ο

±10

Ω

.

L

oa

d

R

esista

n

ce

Wh

en

t

he

VER

T

UN

ITS/DI

V

switc

h

is

setto

1

m

V

/DI

V

t

hr

oug

h

50

mV

/DI

V

,

t

h

e

i

nd

icate

d

val

u

es

i

n

crease

by

500

Ω

.

Exte

rn

al

resis-

tors

ca

n

be

use

d

.

R

esista

n

ces



Seve

n

R

esistances

;100

Ω

,1

k

Ω

,

2

k

Ω

,

5 k

Ω

,

I



~



10

k

Ω

,

20

k

Ω

,

an

d

50

k

Ω

.

Tolerance



f3°/

ο

except

w

h

en

usi

n

g

t

he

50

m

V

,

20

m

V

,

a

nd

10

mV

p

ositions

of

t

he

VER

T

UN

ITS/DI

V

switch

.

T

h

e

tolerance

fo

r

t

h

e

50 k

Ω

t

h

e

n b

ecomes±30%,

fo

r t

h

e

20

k

Ω

±14%,10

k

Ω

t7"/

ο

,

an

d

5

k

Ω

f3°/

ο

w

he

n

t

h

e

D

U

T

out

p

ut

voltage

swin

g

is

2

.5

V

o

r

less

.

T

he

m

axi

m

u

m

tolerancedecreases ex

p

o-

n

e

n

tially

as

t

he

ou

t

p

ut

swing

is

i

nc

r

eased

a

nd

is

less

t

ha

n

t3°/

ο

w

h

en

t

he

out

p

ut

is

swin

gi

n

g

±30

volts

.

Ta

b

le

1-2

ENV

I

R

O

NMEN

TA

L

C

HA

R

ACT

ER

ISTICS

C

h

a

r

acte

r

istic



P

erformance

R

eq

ui

r

e

m

e

n

t



Ι



S

u

ppleme

n

tal

Tem

p

eratu

r

e

S

p

ecified

O

pe

r

ati

ng



Ι



Ι



+10°

C

(+50°

F)

to

+40°

C

(+104°

F)

U

sef

u

l

O

pe

r

ati

ng



Ι



Ι



0°

C

(+32°

F)

to+50°

C

(+120°

F)

Non-operating



Ι



Ι



-40°

C

(-40°

F)

to

+65°

C

(+149°

F)

.

Altitu

d

e

Operatin

g



Ι



Ι



To

10,000

feet

(3000

metres)

Tra

n

sportatio

n

12-i

n

ch (30

cm)

p

ack

age

d

rop

.

Qualified

u

nd

e

r

t

he

N

atio

n

al

Safe

Tra

n

sit

Co

mm

ittee

pr

oce

du

re

1

Α

.

Di

m

ension

s

H

eigh

t

W

i

d

t

h

De

p

t

h

W

eig

h

t

N

et

Table

1-3

PH

YSICA

L

CH

AR

ACT

ER

ISTICS

4

.5

i

nches

(11

.4

cm)

7

.9

i

nches

(20

.1

cm)

7

.8

inc

hes

(19

.8

cm)

3

.3

p

ounds

(1

.5

k

g)

STA

N

DA

R

D

ACC

E

SSO

R

I

E

S

R

efer to

t

he

R

ep

laceable

M

ech

a

n

ical

P

arts

list

fo

r

α

listi

ng

of

t

h

e

sta

n

da

r

d

accessories

.

S

p

ecificatio

n

-178

Service