Wavetek 157 Service manual

INSTRUCTION

MANUAL

9045

BALBOA

AVENUE

SAN

DIEGO,

.

CALIFORNIA

N

Y

All

Wavetek

of

one component Wavetek'sobligation

Wavetek's to the

to

is

Wavetek

This

warranty Wavetek, defectiveasa be

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Any

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Parts

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.

Section1GENERAL

DESCRIPTION

ScopeofManual ScopeofEquipment ModesofOperation Remote Functional

Specifications.. . . .

Section2OPERATING

Installation

Inspection Manual Programming

Section3CIRCUIT

Introduction Program Basic

Generator

Low-Frequency

Sine

Conversion

"tone

Burst

Power

Supply

.

Control

Operation

Selection

Operation

Descriptions..

INSTRUCTIONS

.

. .

. ... ...

. . . .

DESCRIPTION

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

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

Generator

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

Generation

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

. ... ... . . . ... ... ... ... . . . . ... ... . ..1-1

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

.

. .

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

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

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. ...

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

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

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

. ...

.

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

. . . . . ... . ... ..1-1

. .

. ... .

. .

. ... .

. .

. . ...

. .

. . .

1-1 1-2 1-2

1-3

2-1 2-1

.

2-4 2-5

3-1 3-1 3-3 3-6 3-7 3-7 3-9

Section4MAINTENANCE

Introduction Recommended Checkout

Troubleshooting

ReplacementofCircuit Replacement

Section5DATAPACKAGE

Introduction Arrangement ListofManufacturers

and

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

Test

Equipment

Calibration

. . . . . . . . . . . . . . . ... ... . . . . . . . . . . . ... .4.4

Boards

Rotary

of

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

.

Switches,

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

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

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

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

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

Dials,orDecimal

Lamps

.

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

. . .

4-1 4-1 4-1

4-5

4-6

5-1

.

5-1 5-1

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SECTION

I

N

SCOPE

This and Synthesizer.Sections1through 5

information

Difference from

SCOPE

The square,ortriangle

yHz(23

amplitudes peak-to-peak,

ratesavoltage-controlled

1000:1frequency

for

Four front-panel grammable contact are remote

The

19-inch

MODES

Front-panel operational

OF

MANUAL

manual

maintaining

the

Model

frequency modulationofthe

modes

programmablefrom

instrumentispackaged

provides

for

Data

basic

model,

OF

EQUIPMENT

157isa

/4 hours

are selectable

intoa50-ohm

of

controls.Three

fromaremote

closures.Frequency,

source

.

rackorfor operating

OPERATION

OF

pushbutton

modes

the

basic

describe

that

precision

waveforms

per

cycle)to1

ratio

operation

:

instructions

Wavetek

generator

witha0-voltto5-volt

either

operation

Model

from1millivoltto10

load.This

can be

modes

sourcebystatic

amplitude,

for

on a

specific

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for

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include

157.Section differences,ifany,

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instrument

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programmed of

operation

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test

bench

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testing,

Waveform

the necessary

consists

6

from

incorpo-

analog

with

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logic

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function

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inastandard

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.

Trigger

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Automatic

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a

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.

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the time cycle.Another

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less

frequency

Search

.

without manual

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Manual

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157

withaVCG

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mode

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remote

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the

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may

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waveformsis0-voltsdc.

stateisthe

amplitude.A

edgeofthe

frequency,

for

front-panel

programmed

pulse input.The

remotelybyinjectinganinput pulse

thanasingle

calibration

input

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to

panel.The

tone-burst

input

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the generatortocomplete

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front

the

.

front

panelorprogrammed

provideanaccurate

operation

front panelorprogrammed place

the

pulseisapplied

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pulse

the

durationofthe

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frequency

cycle

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panel

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calibrated

.

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state

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square

peak

value

output

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permitsasingle

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function

of

the

programmed

accurately

center

157

through

for

the

of

starts at

pulse

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generated

can be having

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Remote

the

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with

.

logic-levelorcontact-closure

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operational

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programming

provides

This

modeisselectedatthe

entire

selected

In

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the

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digital

generator

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preceding functions are

front

panel

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rangetofindaspecific

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functionsinopen-loop

Calibration

operation

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programmed.In this

frequency

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when

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output

programmed

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the

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the generator

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output frequency

signal

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determined by

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signal

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frequency,

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digitally-

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rate

mode frequency control.The

in tion, frequency

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frequency

search,

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the

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of

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swept

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loop

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hysteresis

by

S3)-

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withafront-panel

automatic

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frequency

switch

corrects

100

is switched

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Hz

to

greater

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for

1

the

REMOTE

Transferofcontrol depressing rotary mode, to

(Refer to may 50-pin nizing, Model panel

Programming taneously isanot-allowed operation

FUNCTIONAL

Programming

Operation matic

The coded

range,

selection, are to-analog

In

symbols

manded convertedbythe

whichisappliedtoan

outputsofthese the

Error

The

CONTROL

the

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function,

REMOTE

the

Operations

then

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REMOTE trigger, 157

through

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processing

coding format

program

numerical

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converters

simplified

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Loop

Operation

inverter

inputtothe

OPERATIONS

to a

REMOTE

theirRpositions.Control

to

and

each

connector

section.)Anyorallofthese

programmed

connector

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VCG

separatt

localorremote-program

an automatic

DESCRIPTIONS

contact

(ADP)iscontrolledbybinary

is

modified

controls

amplitude,

generator

(DAC)

block

remotely

frequency

inverter

circuits

generator

remote

closure

mode

diagram of

sourceisaccomplished

pushbuttons

rotary

switch

collectivelyorindependently

in

BCD/binary

on

the

input

signals

BNC

calibration

trigger,orVCG

.

(local/remote) orbyauto-

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numerical frequency,

amplitude

selection

contact

.

function

or

locally.The DAC and

establish

(VCG)

VCGisdisconnected

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maybetransferred

formatatthe

rear

panel.Synchro-

are

connectedtothe

connectors

command

range,

.

Circuit

closures

Figure

1-1,

that

binary

into an

error-sensing

the

analog

operating

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by

turning

of

on the

applications

input

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can

circuit.The

in

the

generator

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rear

simul-

signal

states

frequency

function

functions

cligital-

switch

all

com-

be

code

voltage

state

for

the

search

The

divider

counters

increased.With is0.001 of

frequency

band

.

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Frequences conventional outputisa

.

a

square

The

frequency

the

integrator

for

the square-wave throughSZtoenable

The

triangle converter sinusoidal S7(triangle,

.

is

the output

by attenuation

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output

uation

network

selected

the

Low-Frequency

Waveforms are

synthesized output by the counter circuit

counts the

0

.001

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the

waveform

consistsofthree

circuit

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all

three

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from

100

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triangle

wave,

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the

range

output

circuitS,7.All

wave

each

program

and

selects

frequency

output

square,

level

waveform

from

wave

transforms

or

amplifier

.

program

provide

to

Range

frequencies

from

input

enable

when

pulseisapplied

DAC

engagedasthe circuits frequency

generatortowithin

being

the

is

coupled

output

sine)isthen

over

frequency.One

pulses

that

engaged,

which

Hz

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establishes

trigger circuit

the

and

pulsestoproduce

1

MHz

to

techniques.The

hysteresis

the

interdependent

the

proper

range

.

the

hysteresis

through S6to

input

the

The

programmed

.

before

then

selects

the

desired

the

100Hzto1MHz

from

100Hzdownto100

basic

waveform

the

trigger circuitinthe

this

mode

throughSstothe

from

the

transforms

cascaded

the integrating

In

.

given

being

output amplitude

generator

is

the binary

divide-by-ten

frequency

the

divider

reduces

the

error-circuit

are

produced

switch

with

charging

capacitance

the

trigger

switchiscoupled

waveform

function

the

necessary

applied

the

required

square-wave

DAC.The

square

outputisapplied

selected.Another

counter

are

output

the

top

by

integrator

output

the

other

slope

for

mode,

the

sine

into

at

gain

the

to

atten-

for

range

.

jtHz

counter

waves

at

low-

function-

coupled

bits

into

is

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a

1-2

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LOCAL/

REMOTE

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triangle the

For is

as

Sine output

waveformat0

rangeof100

frequencies

progressively described

previously

conversion,

attenuation

described for the

50

OHM

OUT

.001 of

MHzto100Hz.

from

100Hzdown

switched

for

into

the

function

are

executedinthe

high-frequency

the

generator

to

100

the

counter

error-sensing

selection,

range

amplification,

.

Figure

frequency

pHz,

input

through S

circuit

same

1-1.Simplified

over

the

divider

4

.

and

manner

as

Block

Diagram

SPECIFICATIONS

VERSATILITY

Waveforms Sine

Dynamic

100

pHz

,

square

Frequency

(2

.77

hr)to1

and

triangle

'v

MHz(1psec)in10

ranges

.

Outputs

,

'1,

0

.001 to

3-digit

VCG--Voltage-Controlled Over

signal

OPERATIONAL

Trigger Generator command cyclesbyapplying

lengthofthe Input Plus gate required

10Vp-p

resolution

Output instrument

1000:1frequency

.

Input

impedanceis10

Mode

may or

impedanceis10 k

selectable

A,

intoa50-ohm

(0

.002to20Vp-p

may

be

.

MODES

be

triggered

gated

to

a+gate

desired burst

is -+-5

and

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shorted

Generator

with

ratio

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kQ

to

produce

signaltotrigger

.

voltsto+50

digitally

loadin4

circuit)

open

without

produce

any

damage

0-voltto5-volt

single

discrete

volts

.

variable

ranges

.

to

cycles

number

input

for

from

with

on

the

of

1

digit).Closed-loop

grammed

period Loop

msec quency

Manual Instrument programmed ulated Open-loop periodatconstant

VCG

1

MHz

Slew

VCG Frequencyvsinput ±0 .1% ±1%10kHz-100 ±3%

frequency

.

will settletowithin the

minimum

and

range

Cal

Mode

can

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frequency

about

this

stability

Bandwidth

.

rate

100%

of

Linearity

100jHz-10

100 kHz-1

MHz

stabilityiswithin

at

constant

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.

calibratedtoan

and

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temperature

kHz

center

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within0.05%

range

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temperature

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triggered

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for

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Auto Generator

ouput

Manual Generator is momentary

triggered

Search Generator frequency transferred control

Sync Within

quency

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HORIZONTAL

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Frequency

selector

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frequency

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Mode

manually

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returned

then

switchisreleased

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for

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the upper 4 synchronizedtoan

thatiswithin1%of

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syncing

PRECISION

for

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control

high

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digital

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manual

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and

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sweeping

instrument

the

less

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programmed

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selected

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a

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of

signalofapproximately

free-running

than1%.

is

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frequency,

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turn

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frequency

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the

but

when

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plus

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VERTICAL

Amplitude kHz

Peak-to-Peak

1Vto10V

0.1Vto1Vrange 10 1mVto10mV

Amplitude

.

All range

Trigger

amplitude

.

PURITY

Sine

k

Less

Triangle Greater

PRECISION

change

and0.5

mV

waveforms

Wave

than

0.5% 1%10kHzto100

3%

99%1Hzto100 95%

to

100

Symmetry

.

start-stop

program

'

Distortion

.

100

kHzto1

Linearity

than

100

db to

Voltage

range

mV

range

are

MHzto10

:

kHzto1

with frequencyisless

1

MHz

.

Accuracy%of Prograrn

±(0

+5mV)

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about

be 0V±0

than0.1dbto

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ground

±1%offull

.5%

of

100

output

Wave

Square

Less

than

ISOLATION

100

Rise

nsec

and

.

Fall

Time

Configuration

True Note:-2

False

Note

Logic"1" _

or

volts

or

Logic

Open

:

C

sinks

"0"

circuit

to

-10

--1

volt

volts

.

---2

volts

approximately1.5mA.

= 0

voltage

to

volt

approximately

.

+0.7volts

.

signal

Output Caution

at

raised

ENVIRONMENTAL

Temperature Specifications

Operating temperature

REMOTE

ConfigurationA(Standard) TrueorLogic"1" =0volt

0

Note

:

FalseorLogic

Note:Open

Configuration TrueorLogic"1"=0

:0volt

Note

FalseorLogic

:

Open

Note

can be mustbetaken potential

applyat25°C

CONTROL

volt

sinks

"0"=+2

circuit

B

sinks

"0"=--2

circuit

raised

as

.

range

SPECIFICATIONS

approximately

volts

voltage

volt

approximately

volts

voltage

above

ground up

all

exposed

±5"C

.

0°Cto50°C

±1

volt

.

1.5mA

-

.F

to

10

volts

is

approximately -Q

±1

volt

.

1.5mA

--10

to

approximately-2volts

is

BNC

.

volts

connectors

.

to

volts

250V.

are

.

Configuration TrueorLogic

Note:+2

FalseorLogic

Note:Open

Program

1

MECHANICAL

Weight 24

Power 105 Hz 50

volts

Transition

msec

.

lb,34Ib

Vac

to

.

wattsofpower

Precision of

selected

D "'I"

_ +2

sinks

approximately

"0"=0

circuit

voltage

Time

shipping

125

.

Vacor210

required

specifications

range

voltsto+10

volt to +1

approximately-0.7

.

NO

.

volts

1.5mA

volt

Vacto250

TE

over

apply

.

Vac,50Hz

10%to100%

volts

.

to

400



SECTION

INSTALLATION

Conversion

The transformer otherwise 230-volt

conversion

Board)inthe

should

(Refer to information

Rack Mounting

The ordered

when

mounting adapters, follows

1.Remove left

respectively

2.Install Chassis supplied previously

3.Secure standard

INSPECTION

The the

user

proper operating checkout miningifthe

Visual

After the

external parts

for

230-Volt

Model

157isshipped

connected

specified.To

operation,

switch

230

be replaced

ReplacementofCircuit

on removing the

Model

157isequipped

for

bench

ordered

:

and

following

Inspection

carefully

for

ofabench

Wavetek

the

right

.

one

rack

Assembly

with

occupied

the

Model

rack

procedures

that

the

instructions

instrumentiswithin

unpacking

Line

Power

from

the

factory

for

115-volt

convert

remove

(locatedonthe undersideofthe

position.The

witha1

use

useina

modelisdesired,

partNo.

flathead

six

side

railstothe

mount

with

the

adapters, using

by the

157inthe

mounting

instrument

condition.Complete

are

for

damage

the

bottom

/2-ampere

bottom

with four

and

with

standard

210-367,

machine

adapteroneach

the

flathead

hardware

shouldbeperformed

arrived

has

providedinSection4for

the

instrument,

to

line

transformer

cover

1-ampere

fuse

after

BoardsinSection4for

cover

.)

rubber

rail-attaching

19-inch

two

can

screws

left

and

six

roundhead

the

screws

desired

rack

.

at

its

calibration

electrical

knobs,

dials,

with

the

power

power,

fuse

that

right

tapped

.

position

destination

specifications

visually

unless

primary

and

place

Mother

(rear

panel)

conversion

feet

when

hardware

rack.If

rack

mount

be

used

retain

handles,

sideofthe

screws

holes

with

to assure

deter-

inspect

indicators,

rack

and

for

the

in

as

surface the

Operating

The

.

checkoutofinstrument exist, following

for and

y1. .

10.Depress

.

11.Depress

12.Step

areas,

carrier

RefertoInstallation

230-volt

procedural

refertothe

performing

Figure

Name

Oscilloscope

Depress

2.Connect 50Q

3.Depress

4.Depress

5.Set

FREQUENCY

6.Set

TERMINATED

V

.

7.Observe correctnessofthe

8.Depress outputis+5

9.Press put

shouldgoto

to+5Vdc

CAUSEARCH clockwisetomaximum

should respondtofrequency

100

Hz

indicated

from

100Hzincrements

TI

etc.If

damageisdiscovered,

who

transported

Inspection

line

power

stepsinthis

Warrantyinthe

test

equipment,orequivalent,isrecommended the

electrical

2-1

for operating

POWER

OUTPUT

AUTOCAL

oscilloscope

the

SINGLE

the

to

the

and ",,in

waveform

the

10 through1.

pushbutton

oscilloscope

connector

pushbutton

'

-

L

signal

TRIG

Vdc

.

CYCLE

---5

each

time the

SEARCH

control

more

than

AUTO

most-significant-decade

INSTRUCTIONS

the

instrument

NOTE

paragraph

instructions

paragraph

operation.If

frontofthe

inspection.(RefertoTable

control

Manufacturer Tektronix

_m.._

.

through

.

pushbutton

.

dials

for

1000

P-P

AMPLITUDE

displaytodetermine

output

pushbutton

Vdc

for0.5

pushbuttonispressed

pushbutton and

from

clockwise

1

kHz

over

CAL

pushbutton.Depress

.

Output

turn

.

Output

from1kHzto100Hz.

should

.

for

115-volt or

.

electrical

descriptions

50-ohm

.

.00Hz.

for

Steps

and

observe

several

milliseconds

maximum

positions.Output

control

the

control

should

FREQUENCY

change

fileaclaim

provideaquick

manual.The

terminator

dials

8 through 16

rotate

from

respond

frequency

with

deficiencies

2-1

.)

Model 454

to

for10.00

the

general

that

the

times.Out-

and back

.

MAN

the

counter-

less

than

range

.

the

with

dial

in

.



2-1

CONT

Table

2-1

Name

CONTROLS

POWER

MAN

AUTO

TRIG

SEARCH

REMOTE

SINGLE

pushbutton

CAL

pushbutton*

pushbutton

'1, '",,

pushbutton**

r\,

pushbutton

CYCLE

pushbutton

FIR

FOUFNCY

dials

Most-Significant

Decades

Dial

Range

CONDENSED

.

**

Decade

OPERATING

Description

Applies depressed

*

Closes frequency-error that trol to for engage,

leased)

*

Closes

power

.

CAL/SEARCH

MAN

nullmeter

and calibrate VCG

frequency

operation

opens

.

frequency-error

fixed-frequency

frequency-error

Opens enables operation

Opens that

trol selected connects trol

-

I"ransfers and connector

Selects Selects Selects

Transfers

trigger circuit

.

frequency-error

MAN

CAL/SEARCH

can

be

frequency

digital

.

automatic

trigger

control

.

square-wave triangle-wave

sine-wave

function

remote connector Provides

lected pushbutton mentary

Programs selection

Numbered

through 10

one-cycle

output

is

engage)

decimal

.

decimally

with

remote-control

logical

"0"ifnot

grammed

Numbered

through 9

.

decimally

with

remote-control

logical

"0"ifnot

grammed

Lettered

tion),

mHz

.

from

(three (three positions), (three

remote

positions,

.

DATA

unit

to

when

loop

can be

output

(momentary

when

loop

operation

.

loop

for

pulsed

loop

to

range

sweep .

used

frequency

calibration

remote

to

output

.

output

.

output

.

control

.

of

the

when

the

TRIG

depressed

(mo-

.

Frequency

from

R

being

transfer,

or

remotely

from

R

being

transfer,ora

remotely

PHz

(one

posi-

positions),

through

and

R

so conused

re-

for

and

so con-

Dis-

con-

to

se-

the

pro-

the

pro-

Hz

kHz

for

Table

Name TERMINATED

AMPLITUDE

dials

Most-Significant

P-P

Decade

Description Programs

selection Numbered

10

-control if

not

Decades

Numbered through remote-control logical grammed

Range

Dial

Lettered tions) for

INDICATORS

Nullmeter

Operates MAN button Calibration

FREQUENCY

lamps

point

clecimal-

Illuminate

decimal

of operation--pilot

range

TERMINATED AMPLITUDE

P-P

Illuminate of

decimal

tion--pilot

dialisinRposition

CONNECTORS

OUTPUT

502

ANCE

AMPLITUDE

CALIBRATED 5052

LOAD

VCG

IN

IMPED-

INTO

Output amplitude

Analog modulationofprogrammed quency

1

TRIG

IN

Input

burstsofdesired

a

SYNC

IN

Input

frequency

SYNC

0

OUT

REMOTE

Output device

Input logic

remote

:

NOTE

Pushbutton

linked.Depressing depressed

pushbuttoninthe

switches

any oneina

same

marked*or**are

set

.

decimal

.

decimally

with

R

transfer,

remotely

9

"0"ifnot

.

from V

to

.

remote

in

CAL

during

and

.

to

point

dialisin

to during

for

waveform

input

.

for

pulsetoproduce

for

synchronizing

with

for

sychronizing

with

synthesizer

for

level

source

releases

.

amplitude

1

through the a

logical

remote-

being

or

programmed

decimally

with

R

from

being

transfer,

remotely

mV

(three

(one

position)

and

conjunction

and

SEARCH

Checkout

during light

position

manual

only

position

manual

only

.

position

opera-

if

indicate

R

indicate

light

.

selected

function/

.

for

frequency

duration

.

output

external

signal

external

.

contact-closure

programming

.

mechanically

any

other

previously

"0"

.

the

or

pro-

posi-

with

push-

and

range

fre-

tone

or

from

0

a

R

if

.

2-2

2-1.Operating

View

controls,

View

indicators,

and

connectors

Front

Figure

Rear

.

2-3



INTRODUCTION

This

section user Programmable

Section5graphically the

Model theoretical references schematic used complicated six

discussional

1.Programming

2.The

3.The

4.Sine

5.Tone-burst

6.Power-supply

presents

in

understanding

Waveform

157 and

discussion.In

are

diagramsinSection5and

in

this

100

Hz

100

pHzto100Hzgeneration

conversion

should

made

sectiontosupplement

circuits.The

parts

the

various

1

MHz

to

.

generation

characteristics

theoryofoperationasan

and

maintaining

Synthesizer.The

illustrates

throi--ighout

theoryinSection3is

:

generation

.

the

functional

be referenced

addition to

the

text to

simplified

generator

characteristics

.

when

the

block

specific

diagrams

text

divided

aidtothe

Model

diagram

features

reading

diagram,

board

for

more

.

157

in

of

the

are

into

MAN

CAI_

switching

across

the

error

VCG

first

may

cll3

:,trc-i

SEARCH

inverter the disconnected enables singie SEARCH

TRIG

Board ofK6closes, the generator

(Refer additional

amplifier

be

accurately

priortoanAqg

switching

output and^the

first

VCG

the

frequency

control

switching which

the

to

details

cul

(momentary)

amplifier

amplifier.Also,

from

VCG

to

range

.

turnsondriverQ8on the VCG/Integrator

energizes

causing

subsequently

descriptionoftone-burst generation

.)

input

set

control

connects

rnanual

the

first

swewp

%vith

relayK6.

emitter

output and

so that

with

the

operation

the

calibration/search

the

VCG

the

one

The

followerQ9to turn

enters

CRIPTI

connects

output

the

the generator

MART

CAL/SEARCH

.

nullmeter

error

amplifier

generator

basic

turn of

the

normally-open

the standby

the

frequency

between

input,

MAN

condition

nullmeter

into

the

input

to

output

which

over

any

CAL/

contact

off,

and

for

is

.

PROGRAM

Generator

The

generator-mode

the

block

Assembly Board

the generator

functions occur

REMOTE voltage inputtothe controloferror connector canbeprogrammed

AUTO voltage

error generator

SELECTION

Mode

Selection

diagram

schematic

switching

CAL

input

amplifier

operatesinclosed-loop

and

diagram.When

mode

.

amplifier

so that

.

switching

to the

outputtothis

selection

diagram

rowisdepressed,

either

first

circuitisgraphically

detailedonsheet1of

and

also

one

of the pushbuttons

disables

first

disconnects

the

MAN

VCG

amplifier

output

closed-looporopen-loop

VCG

relayK5toaremote

the

amplifier

.

shown

the

Chassis

the VCG/Integrator

the

MAN

and

so that

following

CAL/SEARCH

and

transfers

connects

the

circuit

mode

basic

the

in

Function

The the Assembly schematic is

depressed,

REMOTE pushbuttons nectortothe Function

`Lswitching

to

Board

^

vswitching

to

Board

ti

to Board

Selection

function-mode

block

diagram

diagram.Whenaspecific

switching

Board

provide

.

provide

.

switching

provide

.

selection

and

schematic

the following

disconnects

and

connects

sine,

square,

.

energizes

the square

energizes

the

triangle

energizes

the

sine

circuitisgraphically

detailedonsheet1of

diagram

waveform

waveformtothe

waveform

and

the

pushbutton

circuit

functions

the

front-panel

the

pins

on the

and

triangle

relay

K3 on

relay

K2 on

relayK1on the Function Board

to

relay

the

Function

occur

remote

driversonthe

Function

Output

Function

Output

shown

Chassis

Board

this

row

in

:

function

con-

Board

Amplifier

Board

Amplifier

in

Frequency

The diagram

fifth-decade switch, shown diagram;the

digital-to-analog

Board

the

Selection

frequency-selection

as

the

driver/ladder,

and

the

range

on

sheet1of

first

converter

schematic

frequency

diagram;the

DAC matic diagram;the the

VCG/Integrator

diagram

number

from

diode

binary

frequency-range schematic

Frequency converted proportionaltothe shown The a

simplified decades..

on

the

BCD

code,

binary

weightof2°.

DACs

have an unmodified

diagramofa

-all

Error

in

others

Driver01isbiased

circuitisshown

first-decade

driver/ladder

the

range

matrix.The

the

Chassis

Assembly

and second decade

(DAC)

third

in

the

Crystal

range

capacitor/relay

Board

schematic

matrixonthe

.

of

selection

logic

BCD

Amplifier

this

case,ismodifiedbya

the

to an

coding by the

Board schematic diagram

Allofthe

BCD

single

binary

function

off by

similarly

the

+6-voltdoconnection

in

capacitors,

digital

switch

Board

of the frequency

in

the

Error

through

fifth

One-Shot

switching

diagram;and

Matrix

Range

first

decade

analog

voltage

first

"1

frequency decade

other

input.Figure

for

input

.

the

block

through the

the

range

details

are

schematic

Amplifier

of

decade

Board

sche-

circuit

the

Board

switch

that

*"

that

3-1

DAC

has

is

decade

oneofthe

and

in

is is

K1isinits

relay across

the

summing Whenalogical driveristurnedonand

12

volts

the

summing network R6represent DAC.Similarly,

circuits tionofresistance

provide proportionaltothe

'The

frequency binary showninthe

BCD

coding

.

or

remote shown shows

the

a

the

resulting

RelaysK4through fast-slow the

Range

normally-open

R1andRz

acrossR1

associated

with

and

zero

nodes

"1"

nodes

all

relays

the

of

appears

the

R3and

and

ResistancesR1

.

with

the01

the

other

of

KZandK3

relayisenergized.This

driver/relay stages.Thus

can be

an

analog

current

selected

range

selector

logictorelay-closure

Range

Matrix

from

programming,

at

the

correlation

relay

switching

Matrix

right

FREQUENCY

the

is

of

the

between

closures

K6 on

.

the

function.Relays

Board

are

state,

resultinginzero

contributiontothe

inverter

at

and

error

the

binary

input

the

correct contribution

andR3

driver,

butR2,R4,

resistanceinthe

represent

achieved

input

frequency

output

functions

schematic

decoded

schematic

these

Function

their

any

parallel

programming

by

to

the

.

is

converted

by

the

diagram.The

range

selector

into

decimal

diagram.Table

decimal

Board

K5, K6,

paralled

by

relays

current

amplifiers

to

Q1,

connects

represent

R5, frequency associated

combina-

VCG

diode

numbers

perform

K7,

andK8on

K4, K3, K2,

volts

in

the

to

the

and

to

that

is

from

matrix

8421

switch,

format

3-1

and

the

.

3-2

BINARY

-24V

INPUT

Figure

3-1.Frequency

Selection,

Simplified

Diagram

Table

3-1.FREQUENCY

RANGE

CODING

Table

3-2.ATTENUATOR

RANGE

CODING

Board Desig

A11 A11 A11 A11 A11 A11 A11

A11 A10 A10 A10

A10 A9

and switch

range.(Refertodescription tional

provide connect frequency (Josed-loop

generator for

The the

proper shown diagram

Amplitude

The diagramasthe

The

Chassis

the amplitude schematic on

sheet2of

The

frequency-number

The

Output anda40-db switched

binary code

Relay

Desig

K1 K2

K3 K4 K5

K6 K7 K8 K4 K3 K2

K1 0 0 K4-6 0

K1

on the VCG/Integrator

the

in

details.)The

circuit

to

the

generator.(Refertothe

additional

frequency

decimal-place

on

sheet1of

.

Selection

amplitude-selection

digital

amplitude-number

amplitude-range

expandedtolist

switch

Assembly

diagram;and

the

Attenuator

into

program.Table

1 0 0 0 0 1 0 0 0 0 0 0 1 0 0

0 0

correct

relays

switching for the

crystal

basic

generator

range

selector

signal

attenuator

details

schematic

attenuationonthe

Chassis

DAC

selection

Board,

attenuator,

the

pathofthe output

associated

0 0 0 0 0 0 0 0

1

0 0

1 1

0 0 0

capacitance

on the

one-shot

details

indication the

circuitisshown

the range/attenuation Assembly

selection circuitryissimilartothe

circuit

3-2isa

Digital

.-.. .

0 0

1

0 0 0 0 0 0

0 0 0 0

0 0

of

.)

(SW6)

Chassis

are

shown

diagram;the

previously

circuit, consistsofa 20-db eitherorboth

circuit

Program

.3

.-4

._-5

0

0 0 0 0 1 1

1

Board,

and

truth

0 0

1 1

0

1

0 0

0

1

0 0

0

1

0

1 0 0 0 0

respectively,

for

the

basic

generator

Range

Matrix

divider

circuit

Output

andtothe

descriptions of

the

also

applies

lamp

(L1,

Assembly

the

range

on

sheet1of the

three

Amplifier

schematic

described

contained

waveform

tableofthe binary

functions

0

0 0 0

flip-flops

low-frequency

diagram

of

67

0 0 0

1

0

1

0 0

1

0

1

0 0 0

1 1

programmed

for

Board

power

L2,orL3)

schematic

in

the

attenuator

decades of

circuit

.

on the attenuator which

by

.

.8_

. .._.

0 0

0 0 0 0

0 0

1 0 0 0 0

1

which

addi-

also that

low-

the

block

Board

(A5)

.

are

the

to as

9

0 0 0

0

1

0 0

1 1

A5-6 A5-7

0

1

0

1 1

NOTE:X

------

BASIC

The and

integrator,

duces both

MHz

1

operation, frequency-converter connected the

input

Open-Loop

When

integrator thatisequaltooneofthe threshold switch.The

regeneration

If

the

the diode

integrator(DZinFigure connecting switch(D3).

the

frequency

nodetothe

.

the output reverses diodeD3topermit amplifier

precisely first equalinvalue, produced by the

I"he

negative integrator

again

The equal

0 0

1

denotes

-----------

GENERATOR

basic

generatorisshowninblock

second

and

triangle

range

the

between

of

power

causes

bistable

connecting

triangleisformedatthe

level

statetoprovideapositive

into twice

VCG

amplifier

net

current

slopeofthe

output

reverses

output

in

value,

attenuatorincircuit

voltage-controlled

hysteresis

the

and

in

open-loop

divide-by-ten

circuit,

the

first

the

Operation

switch

proceedsinthe following

the

first

voltagesofthe

VCG

applied,

is

this

devicetoproduce

assumes

output of the

second

this

With

program

VCG

reaches+2.5

currenttoflow

the

integrator

the

valueofthe

;

therefore,

butinthe

negative

causes

reaches

states

and

but

oppositeinpolarity,

Range

(max) 20-db 40-db

10

mV

100

mV

1000

mV

10V

generator

switch.This

square

waveforms

operation.For

stages,

and

outputofthe

.

high-gain

the

one

hysteresis

the second

3-2)iszero biasedbythe

VCG

amplifiertothe

condition,

flows

from

amplifier

opposite

triangleatits

---2

the

and

integrator

volts,

summing

current

a

outputofthe

the

integrator

.5 volts,

cycleisrepeated

two

VCG

X X

X

.

diagramasthe

amplifiers,

generator

over

the

one-shot

the

error

hysteresis

characteristicofthe

an output

levels

of the

of

its

binary

manner

switch

VCG

amplifier

current

the

output.This

net

direction,

proportional

integrator

the

positive

output.When

the

hysteresis

from

the

node.This

flowing

current

hysteresis

to produce

output.When

the

hysteresis

.

amplifiers

a

100Hzto

closed-loop

stage,

amplifier

switch

voltage

hysteresis

states

.

negative,

is

to

hysteresis

summing

slope

switch

zero

second

current

into

flows

that

the

current

to

switch

are

always

and

directly

X

first

the

pro-

the

are

and

the

diode

to

of

the

biases

VCG

is

the

is

. the the

3-3

Figure

3-2

.

Open-Loop

Operation,

Simplified

Diagram

the

proportional

Ifanexternal

voltage

the change

cation or

On

the VCG/Integrator

levelsatthe

proportionally,

modulation

amplifieristhe the

Q3/IC3

integrator, Function mentary

022/Q23/Q24

stage

028/029

the

Board

Schmitt

Q25/Q26/Q27

are

other square-wave switching

voltage

Closed-Loop

Frequency

accuracyof0

frequency

to

voltageisappliedtothe

thereby

.

Q1/IC1

the

;

Q14/IC4

diode

stage

schematic

trigger

form

one

form

one

halfofthe

.

The

half

outputofthe

.

Operation

nectinganerror-sensing the

basic

generator.With

CAL

pushbutton

depressed, amplifierisconnected amplifier diagram

The divide-by-ten

through

.

error-sensing

stages;the

the

circuit

program

.

VCG

the

outputs

providing

schematic

stage;the

switch,

stage.The

diagram,

coupledtoa

halfofthe

the

bistable

VCG

of

diagram,

second

the

hysteresis

consists

bistable

Schmitt

other

switch

frequency

IC2

half.Similarly,

single-ended1volt

bistable

.01

circuit

either

to

relay

switchisthe

percentisobtainedbycon-

a

feedback

into

AUTO

the

output

the

inputofthe

closure

shown

consistsofthe

the

one-shot

stage

pulse-repetition

;

IN

connector,

amplifiers

modifi-

first

the

VCG

amplifier, stage;and switch,onthe

a

comple-

of

switch.Stage

trigger,

and

Q30/Q31

peak-to-peak

VCG

diode

loop

around

CAL

or

MAN

of

the

error

first

VCG

in

the

block

three

cascaded

will

the

and

frequency

(PRF)

switching

common-collector/common-base

.

one-shot

between

for

(previously

are

course,

1

MHztothe

schematic

and

will

be

generator

stages

the output

matrix);the

circuit

Hz.The

hysteresis

the

range

the

discussed).Since

cascaded,atotal

is

sufficienttoreduce

one-shot

divide-by-ten

diagram,iscoupled

to

the

limited

to the

willbediscussed

IC1/IC2, IC3/IC4,

that

so

output.When

to

basic

generator;closure

contacts,

resistor error

The range are

one-shot range

switching

amplifier

crystal

from1kHzto100

switched

input

matrix

by-ten

stages which, of top

range

of

outputofeach

The Matrix

sensing

Board

circuit discussion low-frequency

Dual

flip-flop

logically

connected providesadivide-by-ten programmed, frequencyofthe

F;closureofK7

0

.1

contacts,0.001F.

crystal

schematic

one-shot

The that

crystal-controlled

4

MHz

sinusoidal

circuitryisshown

diagram

in

oscillator

output

Potentiometric

.

circuit

(consisting

stage

+6-volt

operates

offset

overa10

frequency

switch

from1kHz

0

of

the

rangeof1

top

stage,

shown

low-frequency

error-sensing

each

paired

relayK5is

the

one-shot

0

.01F;

in

Section

(Y1/01)

5.A

producesanaccurate

the

and

source;and

frequency

:1

dividing

output

1

MHz

to

the

three

.001Fis

basic

available

generator

kHz

the

in

the

to

generator.This

circuit

later

.

IC5/IC6

or

dual

circuit

of

K6

contacts,

and

closureofK8

the

upper

free-running

amplifier

the

of

diode-

the

stages

and

the

by

the

divide-

.

Range

error-

;the

are flip-flop digitally

is

the

half

of

Q2-Q4

3-4

provides

buffering appliedtothe configured produce 400

microseconds

from

The

Q5/06

logically

an

accurate

the

divide-by-ten

input

differentiator

this

flip-flop

with

the upper of

begins microseconds

(see

Figure

3-3 for

IC7Bisreset,

to

IC1A

.

cyclingisrepeated

This the output

form,

of

havingaduty

reoccurrence

generator

The

.

offset

+6-volt

for

the

trigger

inputofa

with

400-microsecond

afterasquare-wave

circuits

stage

couples

(C8/R12).The

(IC7A)

enables

first

PRF

sets

oscillator

timing)

the

.

IC7Bisset,

which

for

the

one-shot

cycle

and,

hence, the

time

regulator

oscillator.The

JKT

thirteen

other

rectangular

.

the incoming

differentiated

in

the

the IC7

IC1A

stage.The

flip-flop.The

cycle

a

After

.

high

producing

IC7Atodisable

each

square-wave

is

a

circuit

proportionaltothe

frequencyofthe

(IC2),

the

buffered

output

flip-flop

flip-flops

input

is

signal

pulse

set

after

and,

stateatpin

400

microseconds

the

trigger

input

rectangular

PRF

switching

which

output

received

into

presets

output

count

400

input

.

Thus, wave-

pulse

basic

to

is

circuit

is

are

shown schematic same

circuit

The

one-shot

pulse

turned

a

mately ground.Thus, theDz do

that

(loff)

9

V

source

Conversely,

collectorofQ2isapproximately

the theDZ positive

which the

error amplifier

Comparison circuit

DACismadeatthe

(01/02/IC3),

in

the

upper

diagram.Figure 3-4

.

output

period

that

the

off.This

causes

---1.4voltsdodue

forward

then

flows

biasesD3

from

throughR18

high

the

cathode

potential

causes the

being

zero

+6-volt

summing

the

average current

of

and

the

current

summing

and

error amplifier

the

halfofthe

a

simplified

is

appearsatthe

baseislow,

the

cathode

Q1isturned

collectorofQ2tobe

the

to

approximately

is

and

the

+6-volt

and

nonetothe

state

turnsQ1off

Error

baseofQ1.During the

D1/D2

zero

offset

summing

zero

subassembly

Amplifier

diagramofthis

on and02is

connection

biasesD4.Current

sourcetothe

andQ2on

volts,

approximately+0.7-voltsdc.

biasesD3

offset

from

node

and forward

current

.

from

the

programmed

of the

(Ion)

the

error

to flow

PRF

Board

approxi-

of

--0.7volts

-12

node

.

so that

resulting

in

This

biasesD4

into

switching

frequency

amplifier.If

,

100Hz INPUT

ONE OUTPUT (^

1/25)

1

kHz

INPUT

ONE OUTPUT (-2/5)

SHOT

Figure

3-3.One-Shot

Pulse

Period

10

mSEC

Ratios

for

Minimum

and

Maximum

Frequencies

3-5

FROM FREQUENCY

DAC

1-O

ERROR AMPLIFIER SUMMINGNODE

the

magnitudes and

equal

and

opposite,

to

cause

The ac anddc.

capacitor

fier

the

to schematic

shown two-pole error provide

The causes

modifies direction the

equalinamplitude current

this frequency

programmedinspiteofcomponent

error-voltage

an

error amplifier

Since

provides

C8

saturation.The

MAN

diagram)

on

the

filter

pathtofurther

signal

proper

error

signal

a changeinthe

the output

(either

error

currentatthe

from

the

manner,

of

polaritiesofthese

an

error

current

output

has

considerable

the

PRF

current

negative

outputofthe

CAL

switch

and

latter

(R5,

loop

damping

thatisappliedtothe

frequency

and

digitally-programmed

the

error-sensing

the

basic

(sheet

the VCG/Integrator

to

schematic

R6, R7, C28,

reduce

.

VCG

output

frequency

increaseordecrease)tocause

error

amplifier

opposite

generator

Figure

3-4.PRF

currents

will

result

at

from

the

forward

largeaccomponent,

has

a

feedback

error

1ofChassis

diagram,

C25)isinsertedinthe

ripple

the

VCG

voltage

the

basic

of

summing

polaritytothe

in

circuit

to

value

amplifier

error

gain

to

prevent

amplifier

an

voltage

summing

that,inturn,

generatorinthe

frequency

holds

the output

the

value

drifts

.

Switching

are

not

the

node

.

for

both

ampli-

applied

is

Assembly

Board.As

additional

and

to

node

to be

analog

DAC.In

that

Circuit,

LOW-FREQUENCY

Triangle frequency

Hz.'This

counter,

Slow

The to

506 and square-wave frequency states

basic

the

may range

same frequency

The Section5. not other

which

is

output.Whenatrue

Simplified

and

circuitry

and

Square-Wave

cyclic

are

generator

low-frequency

be

of as

simplified

shown,

inputstothe

require

Diagram

square

ranges

triangle

counter

then

outputs

from

progressively

and

extended

the

instrument.This

previously

inputtothe

logic

The

parallel

but

all

GENERATOR

waveforms covering consists

Generation

the

enter

of

DAC

showninthe

is

logically

back

that

basic

switched

the

inputtothe

range

(100

down

described for

error-sensing

diagram

trigger directly

flip-flops

inputs to

output

are

the

band from

the

divide-by-ten

configured

down

are0.001

generator

between

Hz)ofthe

to

the

operation

for

inputs to

without

are

be

from

digitally

100

block

to count

againtoproduce

to

6

F

The

.

the outputofthe

cyclic

MHz

100

is

providing the

circuit

.

counter

the

each

being

controlled

false

to

NOR

a

gate

in

generated

pHz

stages,

diagram

of

divide-by-ten

countersothat basic

low-frequency

essentially

flip-flop

by

produceatrue

occurs,

the

to

100

cyclic

.

from

the

input

generator

the

correct

appears

gated.All

NOR

gates

both

are

6

in

3-6

the

set

and change terminal

When clock-pulse

pulse inputtobegin starting the

the

Two

counter boards

on tone-burst to

As

slow

provides Q5/06 drivingacompound supply output.Stages equivalent of negative-excursionofthe

Slow

state

.

the

with

counter

is

cycle

binary

as

The

.

the

VCG/Integrator

the

square-wave

shown

I

the

and

for

Triangle

last

generator

inputs

reset

with

the

flip-flopinthe

input,

the

highest

output

repeated

(square-wave)

square

No

in

is 5-volt

the

steps

.

waveforms and

256

.

theory),

amplifier/clamponthe Function Board

the Function

appliedtothe

peak-to-peak

Q9/Q10

configurationtoprovide

positive

Q7/Q8

the

circuitry

Wave

Generation

are

enabled

counterissetattheNo.

logic

gating

sequentially

flip-flop

order

down

outputs

count

and

coupledtothe

is

Board

and

Board

amplifier/clamp

consistofa

excursion

Q11/Q12

just

square-wave

and

into

causes

resetting

.

Thus

until

No

.

are

taken

connected

(described

theNo.

square-wave

described

506

schematic

differential

of

the

are

the

output

the

flip-flop

its

trigger

input

the

flip-flops,

the

afterNo.

6isreached

from

trigger

output.Stages

complementary

and

.

cyclic

the

to

other

circuit

laterinthe

countissent

diagram,

circuit

amplifier

the

collector

square-wave

provide

will

506

506,

and

the

that

the

SINE

CONVERSION

The

selected,

intoasine

block

diagram

this

circuitry

network

(IC2/Q1-04).Figure 3-6

The forms

the top adjust

Conversionofthe

accomplished by

.

resistor the diode simplified parallel-connected

of wave waveisobtained

Duetothe amplitudeofthe before IC2/Q1-Q4

the

(IC3

triangle

the

and bottom

the

networks

both

positive

so that

applicationtothe

required

sloworfast,

waveform

.Inthe

is

shownasa

through

inputisappliedtoclipper

triangle intoatrapezoidal

positive

curve.Only

diagram

and

four

which

and

shape and amplitude

.

losses

inherentinthe

shaped

formapotentiometric

gain

.

triangle

by

the

Function

IC6),

simplifies

peaks.Potentiometers

negative

trapezoidal

temperature-compensated,

are

one

of

Figure 3-6;the

biased

negative

sine

Output

waveformistransformed

sine

Board

clipper

andapotentiometric

this

amplitudes

wave

biased to

such

networkisshowninthe

operateatdifferent

to

excursionsofthe

sine-shaping

wave

Amplifier

convertor

(IC1),

waveform

into

operateatthe knee

symmetry

requires

amplifier

showninthe

schematic

diode-shaping

the

circuitry

IC1

which

R6

.

the

sine

other three

process,

amplification

Board.Stages that

amplifier

for

by

and

trapezoidal

of

diagram,

clarity

trans-

clipping

R15

wave

diode-

of

are

levels

the

sine

the

provides

.

is

The

triangle

digital-to-analog

slow

frequency

"The switching

tor

(IC22),

amplifier schematic diagram.The

binary

configuratedtoprovideacountof500

Figure binary to

switchonin

these bridges from

the

Fofthe

'The

slow switching (discussed

circuits

DAC,

triangle

ranges of

triangle

circuits

the

(IC24/Q3/Q4)

outputs

3-5isa

inputs

from

are

summing

basic

generator

triangle

circuit later)

(discussed

showninthe

converter,

waveform

the

instrument

DAC

consistsofthe

(IC25 through

---6-volt

simplified

their

and

regulator

counter

up

to29

diagramofthe

the

counter

logical

connectedinparallel,

amplifierisa

frequency

outputisconnectedtothe

for

application

the

function-selection

previously)

block diagramasthe

produces

over

the

IC33), the

(IC23),

shown

on the

and

(51210),

cause

binary

triangle

.

the

digitally-generated

pHz

100

.

nine

diode-bridge

+6-volt

and

the

Counter

DAC

are

but

are

.

triangle

the

nine

diode-bridges

sequence.Since

the

resulting

waveformat0

slow/fast

to the

sine

relay-switching

100

to

regula-

summing

Board

capable

logically

DAC.The

all

output

relay

converter

9-bit

Hz

of

.001

TONE

BURST

When

the

programmed VCG/Integrator

relay

K6,

close

(Figure

Priortothe is

turned associated statebyapproximately+3voltsatthe stateofIC6

provides

Turn

offofQ9,

the

flip-flop,

the

flip-floptoassume

is

nowapositive

base

amplifier

011.The short

circuit through "standby

GENERATION

TRIG

pushbuttonisdepressed,ora

during

causing

3-7)

closingoftheK6contact,

on

resistors,

disables

its

programmed

and

feedback

the

Q13/Q11

state"---no

remote

Board draws

the

normally-open

.

by

the

and

the standby

however,

the

voltage

Q12

which,inturn,

path

around

output

operation,

+12-volt flip-flop

output

removes

the

reset state.The

sufficienttoturnongrounded-

around

the

programmed

path

and

.

current

path

IC6isclampedinthe

circuit

.

the

enables emitter the

the

logical

driverQSon the

through

contactofthis

emitter

through

preset

set

integratorisnow

integratorisin

and

state

set

range

the

follower

input.The the

integrator

clamp

input

output,

capacitance

"1"

coil

relay

CR5

from

causes

"Q",

follower

is

of to

Q9

and

set set

a

the

3-7

BINARY COUNTER TO

EACH

INPUT

(ONE

BRIDGE)

FROM

INPUT

+12V

IC24/Q3/Q4

SUMMING

AMPLIFIER

-12V

OUTPUTTO SWITCHING

FUNCTION

Figure 3-5.Slow-Triangle

SLOW/FAST

CIRCUIT

BOARD

RELAY-

ON

Digital-to-Analog

Converter,

Simplified

Diagram

3-

8



M

INTRODUCTION

-

This

section

calibrating, instructions electronics

a

factory-repair possessing maintain

the problem

time

RECOMMENDED

the

factory

should

.

The

Model stabilization within advance of

troubleshooting checks, errorinload errorinthe output

provides

and

troubleshooting

are

concise

technician or

department

the necessary

instrument.If

for

repair,adetailed

be

attachedtofacilitate

157

requires

before

specified

useaprecise

tolerances.Prepare

any

planned

resistance

TEST

instructions

and

field

personnelortest

the

NOTE'

output

checkout,

programs.For amplitude

50-ohm

will

voltage

EQUIPMENT

for

testing,

the

Model

directed to

engineer.Wavetek

for

instrumentisreturned descriptionofthe

one-hour

load.A

causea0

level

the

those

customers not

the

warmup

parameters

for

calibration,

0

.1-percent

.05-percent

.

experienced

equipment

turnaround

this

157.The

adjusting,

maintains

to to

specific

for are

in

or

calibration checkout following the instrument

parameters Electrical point layout

Preliminary

1.Set

2.Press

3.Wait

procedures

Specifications

and

diagramsinSection5.

The

entire firsttodetermine equipment

checkout

generator

the

1

hour

Setting as

settingitto 0

procedures

procedure can be and

adjustment

Procedure

POWER

any

performedbyobserving

applying

calibration

connections

.

mode

for

warmup

rotary

.

for the

are

indicated

title.A

the

of

Section1.

locations

NO

procedure

initial

control

for

REMOTE

pushbutton

.

NOTE

digital

switch to

Model

tolerance factors giveninthe

are

7"E

before

.

157.Instrument

by a

quick

checkout

Circuit

shown

must

settings

attempting

.

R

is

the

checkmark-1/,

of

the

these indicated

board

test-

on the

be

and

board-

read

test

same

The

following equipment.Any maybesubstituted

Name

Oscilloscope Plug-In Electronic

Dialamatic Extender Distortion

*For

CHECKOUT

The

Unit

troubleshooting

following

table

Counter

Voltmeter

Board*

AnalyzerHewlett-Packard

AND

subparagraphs

containsalistofrecommended

test

equipment

for

those

Manufacturer Tektronix

"Tektronix Computer Wavetek Wavetek

.

CALIBRATION

having

listed

.

Measurements

provide

equal

complete

test

accuracies

Model 543B

Wor1A7 727D 201 157-111 332A

sequential

Power

Supply

1 .

Connect inputtoTP1onthe

+12

2.Move voltsdo±10mV.

3.Move for+2.8

4.Move common

5.Connect inputtoTP6

6.Move

voltsdo±200

Square

Wave

1.Connect to the

Regulation

the

voltsdo±10

voltmeter

volts

voltmeter

for

the

voltmeter

Offset

the

50S2

OUTPUT

voltmeter

do200mV.

---0.7voltsdo±100 voltmeter

.

Adjust

mV

and

voltmeter

high

power

mV

.

high

inputtoTP3

high

inputtoTP4

high

inputtoTP5

high

R50

for

connectiontoTP8

.

Amplitude

with

connector

inputtoTP2

supply

board.AdjustR7for

and

check

and

mV

.

inputtoTP7

--24

voltsdo±50

and

precise

on

50-ohm

rear

panel

and

check

and

check

terminator

.

the

for

logic

the

mV

for

low

-12

V

logic

low

.

+6

cc