HP 8081A Operating And Service Manual

About this Manual

We’ve added this manual to the Agilent website in an effort to help you support
your product. This manual is the best copy we could find; it may be incomplete
or contain dated information. If we find a more recent copy in the future, we will
add it to the Agilent website.

Support for Your Product

Agilent no longer sells this product. Our service centers may be able
to perform calibration and repair if necessary, but no other support from
Agilent is available. You will find any other available product information on the
Agilent Test & Measurement website,

www.tm.agilent.com.

HP References in this Manual

This manual may contain references to HP or Hewlett-Packard. Please note that
Hewlett-Packard's former test and measurement, semiconductor products and
chemical analysis businesses are now part of Agilent Technologies. We have
made no changes to this manual copy. In other documentation, to reduce
potential confusion, the only change to product numbers and names has been in
the company name prefix: where a product number/name was HP XXXX the
current name/number is now Agilent XXXX. For example, model number
HP8648A is now model number Agilent 8648A.

(

Flio-

HEWLETT

a:~

PACKARD

OPERATING

AND

SERVICE MANUAL

300MHz

RATE GENERATOR

MODULE

S08iA

PART OF THE 8080 HIGH FREQUENCY

PULSE GENERATOR SYSTEM

SERIAL NUMBERS

This manual applies

directly

to instrument serial number

1604G 00101

For instruments

with

lower serial numbers, refertothe

backdating

informationinSection 8ofthis module

manual.

For instruments

with

higher serial numbers, refertothe

Manual

Change

sheets

at the endofthis module manual.

0265

COPYRIGHT

HEWLETT·PACKARD

GMBH

1975

'------------

703

BOBLINGEN,

HERRENBERGER

STR. 110, WEST

GERMANY.

--.J

MANUAL

PART NO.

08081-90001

MICROFICHE

PART NO.

08081-90501

Printed in

West

Germany

CERTIFICATION

The Hewlett-Packard

Company

certifies that this

instrument

was

thoroughly

tested

and

inspected

and

foundtomeet

its

published

specifications when

it

was shipped from

the

factory. The Hewlett-Packard

Company

further

certifies that its calibration

measurements

are traceabletothe

U.S. National

Bureau

of

Standards to the

extent

allowed by

the

Bureau'$ calibration

facilities, or to the calibration

facilities

of

other

International Standards

Organization

mem

bers.

WARRANTY

AND

ASSISTANCE

This

Hewlett-Packard

productiswarranted

against

defectsinmaterials

and

workmanship.

This

warranty

applies

for

one

year

from

the

dateofdelivpry.

Hewlett-Packard

will

repairorreplace

products

which

provetobe defpctiVl'

during

the

warranty

period

provided

they

are

returned

to

Hewlett-Packard.

No otht-'r

warranty

is

expn'sspd

or

implied.

We

are

not

liahle for

consequential

damages.

Service

contracts

or

clistonwr

assistancl'

agrel'nwnls

are

availabk

for

Ih'wlt:'tt-

Packard

producl.'i

thal

require

maintenance

a.nd

repairon-sitl'.

For

any

assislann"

conlat'l

your

nearpst

Hewlelt-Packard

Sales

and

Service

Offiee. Addresses are

providedatthe

backofthis

manual.

---------------------------

ListofContents/Tables/Illustrations

CONTENTS

Page

Section 5 Adjustments

5-1

Introductio n

1-1

Specifications

1-1

Safety Considerations

1-1

Instruments CoveredByManual

1-1

Description

1-1

Options

1-2

Equipment Required But Not Supplied .

1-2

Equ ipment Available

1-2

Recommended Test Equipment

1-2

Introduction

6-1

Abbreviations

6-1

Replaceable Parts

6-1

Ordering Information

6-1

Introduction

5-1

Safety Considerations

5-1

Test Equipment Required

5-1

Alignment Tool

5-1

Performance Checks

5-1

Related Adjustments

5-1

Duty Cycle and Frequency Adjustments.

5-2

Section 1

1-1
1-4
1-6

1-9

1-11
1-14
1-16
1-18
1-20

Section 2

General Information

Installation

1-1

2-1

5-1
5-3

5-9

5-11
5-13
5-15
5-18

Section 6

6-1
6-3
6-5
6-8

Replaceable Parts

6-1

Introduction

7-1

Recommended Test Equipment

7-1

2-1
2-3
2-5
2-6
2-8
2-10

Introduction

2-1

Initial Inspection

2-1

Preparation For

Use

2-1

Installation in

8080A

Mainframe

2-1

Operating Environment.

2-1

Storage and

Shipment

2-1

Section 7

7-1
7-3

Service

7-1

Section 3 Operation

3-1

TABLES

3-1
3-3
3-5
3-7

3-9

3-12
3-21
3-24
3-26

.3-28

3-36

3-40

Introduction

3-1

Panel Features

3-1

Operator's Checks

3-1

Operating Instructions

3-1

Operator's Checks

3-1

Initial Control Settings

3-1

Operating Instructions

3-3

Initial Control Settings

3-3

Normal Mode

3-3

Trigger Mode

3-3

External Gate Mode

3-4

Internal Gate Mode

3-4

Table

1-1
1-2
4-1
6-1

6-2
7-1
7-2

Figure

Page

Recommended Test Equipment

1-2

Specifications

1-3

Performance Test Record

4-7

Abbreviations for Replaceable

Parts List

6-2

Replaceable Parts

6-5

Reference Designators

7-1

Schematic Diagram Symbols

7-2

I

LLUSTRA

TIONS

Page

Section 4 Performance Tests

4-1

4-1
4-3
4-5
4-7
4-8

4-9

4-10
4-11
4-12
4-13

Introduction

4-1

Equipment Required

4-1

Test Record

4-1

Repetition Rate

Test

4-1

Trigger

Output

Test

4-2

External Trigger Mode (Slow)

Test

4-2

External Gate Mode (Slow) Test

4-3

Manual Function

Test

4-4

External Trigger Mode (Fast)

Test

4-5

External Gate Mode (Fast) Test

4-5

1-1

1-2
3-1
3-2

3-3

3-4

3-5

8081 A

300

MHz

Rate Generator

Module and Supplied Accessories

1-0

Serial Number Plate

1-1

8081 A Controls and Connectors

3-0

Test

Set

for Operator's Checks

3-2
Suggested Equipment Setup for
Operating Instructions

3-2

Rate Generator

OutputinTrigger

Mode

3-3

Rate Generator

OutputinExternal

Gate Mode

3-4

ListofIllustrations/Schematic Diagrams

ILLUSTRATIONS

Figure

4-1
4-2

4-3

4-4

4-5

4-6

4-7

5-1

5-2

6-1

Page

Repetition Rate Test Setup

4-1

Trigger

Output

Test Setup

4-2

External Trigger Mode (Slow)

Test Setup

4-2

External Gate Mode (Slow) Test

Setup

4-3

Manual Function Test

Setup

4-4

External Trigger Mode (Fast) Test

Setup

4-5

External Gate Mode (Fast) Test

Setup.

4-5

Duty Cycle Adjustment Test

Setup

5-2

Frequency Adjustment Test

Setup

5-2

8081 A Replaceable Parts..,

6-4

SCHEMATIC DIAGRAMS

Diagram

Page

1
2

3

Control Board A1
300

MHz

Rate Generator Board A2

Distribution Board

A3

7-9

7-11
7-12

SCREWS

CABLE

808TA

Figure

1-1.

8081 A 300 MHz

Rate

Generator Module

and

Suppl

ied

Accessories.

,-------------------------------SECTION

1

"--~----------------------

GENERAL INFORMATION

1-1

INTRODUCTION

1-2

This

Operating

and

Service manual

contains

information

requiredtoinstall,

operate,

test,

adjust

and

service

the

Hewlett-Packard Model 8081 A

300

MHz

Rate

Generator

module.

Figure

1-1

shows

the

module

and

accessories supplied.

This

section

covers

instrument

identification,

descrip-

tion,

accessories, specifications,

and

other

basic informa-

tion.

1-3

A

microfiche

versionofthis manualisavai-

lable

on

4 x 6 inch

microfilm

transparencies

(order num-

ber

on

title

page). Each

microfiche

containsupto

60

photo-duplicatesofthe

manual pages.

The

microfiche

package also includes

the

latest

Manual Changes supple-

ment

as well as all

pertinent

Service Notes.

1-4

SPECIFICATIONS

1-5

I

nstrument

specifications

are

listed in

table

1-2.

These

specifications

are

the

performance

standardorlimits

against

which

the

instrumentistested.

is

a significant changetothe

instrument.

The

last five

digits are assigned

to

instruments

sequentially.

The

con-

tentsofthis manual

apply

directlytothe

instrument

serial

number

quotedonthe

title

page.

For

instruments

with

lower serial numbers, refertothe

backdating

infor-

mationinSection8of

this

module

manual.

For

instru-

ments

with

higher serial numbers, refertothe

Manual

Change

sheetsatthe

endofthis

module

manual. In addi-

tiontochange

information,

the

Manual Change

sheets

may

contain

information

for correcting

errorsinthe

manual.Tokeep

this

manual as

up-to-date

and

accurate

as possible, Hewlett-Packard

recommends

that

you

periodically

request

the

latest Manual Change supple-

ment.

The

supplement

for

this

manualisidentified

with

this

manual's

print

date

and

part

number,

bothofwhich

appearonthis

module

manual's

title

page. Complimen-

tary

copiesofthe

supplement

are

available from

Hewlett-Packard.

HEWLETT-PACKARD

GmbH

[1536G00062

]

BOBLINGEN

..

Figure

1-1.

Serial Number Plate

1-6

SAFETY CONSIDERATIONS

1-11

DESCRIPTION

1-7

The

Model 8081 Aisa

Safety

Class 1 instru-

ment

(it has an

exposed

metal chassis

thatisconnected

to

earth

via

the

8080A

system

mainframe). This instru-

ment

has been designed

accordingtointernational

safety

standards

and

has

been

supplied in a safe

condition.

1-8

This

operating

and

service manual

contains

information,

cautions

and

warnings

which

must

be fol-

lowed

by

the

usertoensure

safe

operation

andtomain-

tain

the

instrument

in a safe

condition.

1-9

INSTRUMENTS COVERED BY MANUAL

1-10

Attachedtothe

insideofthe

instrument

side

frameisa serial

number

plate (figu re

1-1).

The

first

four

digitsofthe

serial nu

mber

0 nly change

when

there

1-12

The

Model

8081Aisa

0-300

MHz Rate

Generator

module

designedtoprovide a clock

source

for

another

8080

system

module.

The

8081 A has four

operating

modes:

Normal

Trigger

External Gate
Internal

Gate

In Normal mode,

the

rate

generatorisfree-runningatthe

repetition

rate

selected by

the

rate controls.InTrigger

mode,

the

rate

generatorisbypassed

and

thepuIse

outputismerely a

shaped

versionofa pulse

input

from

eitheranexternal

sou rceora manual

pushbutton.

In

External

Gate

Mode,

the

rate

generator

outputisgated

Mainframeisrequired.

The

8080A

mainframe provides

housing and power supplies for

the

8081

A.

by a gate pulse

from

an external sourceora manual

pushbutton.

Internal Gate

mode

can

only

be useed with

an

8084A

Word

Generator

module.

The

trigger slope

polarity

and

threshold

levelofexternal gate/trigger

in-

putsisadjustable.

1-18

EQUIPMENT

AVAILABLE

1-13

The power supplies

for

the

8081 A are pro-

vided by

the

8080A

Mainframe.

1-15

The

only

option

for

the

8081 A Rate Gener-

atorisa second

copyofthe

operating

and service

manual

which

canbeobtained

by ordering

option

910.

1-19

The

8081 Aisone

of a

complete

range

of

rep. rate, timing and

output

modules

that

form

the

8080

high frequency pulse generator system. Repeti-

tion

rates range from

0-1

GHz

and

the

modules are

interchangeable

to

enable youtopurchase a system

exactly tailoredtoyour

requirements.

1-14

OPTIONS

1-20

RECOMMENDED TEST EQUIPMENT

1-16

1-17

EQUIPMENT REQUIRED BUT NOT

SUPPLIED

To

operate

the

8081 A module, an

8080A

1-21

Equipment requiredtomaintain

the

8081 A

is

listedinTable

1-1.

Other

equipment

canbesubsti-

tuted

if it meetsorexceeds

the

critical specifications

Iisted

in

the

table.

Table

1-1.

Recommended

Test

Equi

pment

Instrument

Critical Specification

Recommended Model

Used

in

Mainframe

HP

8080A

Performance Tests,
Adjustments

Electronic

Counter

upto350

MHz

frequency

HP

5345A

Performance Tests,
Adjustments

Sampling Oscilloscope >

300

MHz

bandwidth;

HP

182C with

Performance Tests,

upto200

mV/div sensitivity;

HP

1810A

plug-in

Adjustments

upto0.5

ns/div sweep speed;

50

ohm

input

impedance

Real

Time

Oscilloscope

up

to1MHz

bandwidth;

HP

182C with Performance Tests

upto1 V/div sensitivity;

HP

1804A

and

upto10 Ils/divsweep speed;

HP

1821 A plug-ins

four

input

channels

Oscillator

up

to

10KHz

frequency;

HP

651 B Performance Tests

up

to

1 V

RMS

amplitude;

50

ohm

output

impedance

Pulse

Generator

upto250

MHz

frequency;

HP

8082A

Performance Tests

2 ns pulse width;

0.5

V

amplitude; positive-polarity;

50

ohm

output

impedance;

square wave facility.

50

ohm

Feedthrough

HP

10100C

Performance Tests

Termination

50

ohm

Tee

Connector

HP

1250-0781

Performance

Tests

Model

8081A

-------------------------------1-3

Table

1-2.

Specifications

TIMING

Repetition

rate:

Period

jitter:

EXTERNAL

INPUTS

Repetition

rate:

Trigger

mode:

Gate

mode:

Input

impedance:
Trigger level:
Sensitivity:
Slope:
Max.

input

voltage:

INTERNAL

GATE INPUT

Gate

duration:

Input

impedance:

Amplitude:

High level:

Max

input

voltage:

EXTERNAL

TRIGGER OUTPUT

Amplitude:
High level:
Duty

cycle:

Output

impedance:

Transition

time

(10%to90%):

Max.

external

voltage:

INTERNAL

OUTPUT

Fan-out*:
Amplitude:
High level:
Duty

cycle:

Output

impedance:

Transition

time

(10%to90%):

Max.

external

voltage:

OPERATING MODES

Norm:
External

trigger:

External gate:
Internal

gate:

Manual:

OPTION 910
SIZE

10Hzto

300

MHzin8 ranges

~

0.1 % ± 50 psec

o

to

300

MHz, pulse width;;;'

1,7

ns

gateonduration>1periodofint

rep rate,

gate

off

duration>

1 period +

10

ns

50 n typical

-lV

to

+ 1V

200

mV

p-p

neg/pas

selectable

±6V

on>

10

ns,

off>20ns

50 n typical

~

500

mV

p-p

OV±100mV

±lV

~

500

mV

p-p

OV±100

mV

50% ± 10%

50

n typical

~

1.2

ns

±2V

1

~

500

mV

p-p

OV±100

mV

50% ± 10%

50

n typical

~

1.2

ns

±2V

Repetition

rateisdeterminedbyfront

panel

controls.

Repetition

rateiscontrolled

externally.

Shaped

input

signalisoutputatboth

internal

and

external trigger

outputs.

Gate signal

turns

repetition

rate

generatoronsynchronously.

External

inputisdisconnected.

Generatorisgated

through

internal

gate

input.

All

external

functions

can

be triggered

manuallybypressing

a

pushbutton.

Add itional

instrument

operating

and

service manual.

Quarter

mainframe width

* Fan-out: max.

numberof8080

system

modules

which can be driven

UPDATE A NOV

76

.-----------------------------

SECTION 2

INSTALLATION

2-1

INTRODUCTION

2. Remove

the

upper

two

feet

from

the

rear

of

the

BOBOA

mainframe.

2-2

This

section

provides installation instruc-

tions

for

the

Model

BOB1A300

MHz Rate

Generator

module. It also includes

information

about

initial inspec-

tion

and

damage

claims,

preparation

for

use,

and

packag-

ing,

storage

and

shipment.

2-3

INITIAL

INSPECTION

2-4

Inspect

the

shipping

container

for

damage.

If

the

containerorcushioning

materialisdamaged,

it

shouldbekept

until

the

contentsofthe

shipment

have

been

checked

for

completeness

and

the

instrument

has

been

checked

mechanically

and

electrically.

The

con-

tentsofthe

shipment

shouIdbeasshown

in Figure

1-1.

Procedures

for

checking

the

electrical

operation

are

given in

Section

3. If

the

contents

are

incomplete,

if

thereismechanical

damageordefects,orif

the

8081

A

does

not

pass

the

operator's

checks,

notify

the

nearest

Hewlen-Packard

Sales/Service office. If

the

shipping

containerisdamaged,orthe

cushioning

material

shows

signsofstress,

notify

the

carrieraswell as

the

Hewlett-

Packard

office. Keep

the

shipping

materials

for

carrier's

inspection.

TheHPoffice

will

arrange

for

repairorrepla-

cement

without

waiting

for

claim

settlement.

2-5

PREPARATION FOR

USE

2-6

Installation in

8080A

Mainframe

ICAUTION]

The

following

installation

procedure

must

onlybecarried

outbyqual ified service

personnel.

3.

Remove

the

80BOA

mainframe

top

cover.

4. Insert

the

BOB1

A in

the

required

posi-

tioninthe

BOBOA

mainframe

(there

are

no

electrical

limitationsonthe

position).

5.

Secure

the

80B1 Atothe

8080A

main-

frame

using

the

two

screws provided.

6.

Connect

the

internal coaxial

cable

from

the

8081 Atothe

word

generator,

delay,

output

amplifier

modulesorto

remote

equipment

as required.

Connections

are

Internal

Output

and

Internal Gate. A con-

necting

cable

for

the

Internal

Output

is

supplied.

7. Replace

the

BOBOA

mainframe

top

cover.

B.

Replace

the

two

feetonthe

rearofthe

8080A

mainframe.

2-8

Operating Environment

2-9

The

8081

A will

operate

within

specifications

when

the

ambient

temperatureisbetween

OOC

and

550C.

2-7

To

operate

the

BOB1

A, it

must

firstbeinstal-

led in

an

BOBOA

Mainframeasfollows:

2-10

Storage and Shipment.

1.

Switch

the

mainframe

LINE

OFF/ON

switchtoOFF.

Disconnect

the

power

supply

cable

from

the

rearofthe

8080A

main-

frame.

2-11

The

BOB1Acanbestoredorshippedattem-

peratures

between

-40

o

C

and

750C.

The

instrument

should

be

protected

from

temperature

extremes

which

cause

con-

densation

within

the

instrument.

2-12

If

the

instrumentistobeshippedtoa

Hewlett-Packard

Sales/Service Office,

attachatag

show-

ing

owner,

return

address,

model

number

and

full serial

number

and

the

typeofservice required.

The

original

shipping

carton

and

packaging material

maybere-usable

but

the

Hewlett-Packard

Sales/Service

office

will also

provide

information

and

recommendationsonmaterials

tobeusedifthe

original

packingisnot

available

or

re-usable. General

instructions

for

re-packing are as fol-

lows:

1.

Wrap

instrument

in heavy

paperorplastic

2. Use

strong

shipping

container.

A double-

wall

carton

madeof350-poundtest

material

is

adequate.

3.

Use

enough

shock-absorbing

material (3 (

to

4 inch layer)

around

all sidesofinstru-

menttoprovide

firm

cushion

and

prevent

movement

inside

container.

Protect

control

panel

with

cardboard.

4.

Seal

shipping

container

securely.

5.

Mark shipping

container

FRAG I

LE

to

encourage

careful

handling.

6.

In

any

correspondence,

refertoinstru-

mentbymodel

number

and

full serial num-

ber.

RATE

•

--NHI.-

-k.ti::r-

-"'1:---

300-100-10'"•-100-10

- 1

-100-10

1

. 3 3 - 10 • 1 -1·10 -,-1~10-\00

PERIOD

VERNIER

2

'f)(T

tNPU1

l.fVEL

GATE !

/::'~

NORM TRIG EXT

tNt

,

...

,

3

_iii_iii

-IV

.,v

4

====="~=

5..

~AN

6.

=

EXT

INPUT TRIGGER OUTPUT(-)

o EXT INPUT LEVEL

control:

determines

the

threshold

voltageofthe

external

trigger input.

Adjustable

from-1Vto+1

V.

@ NEG-POS-MAN switch:

for

selecting

the

slope

polarity

and/or

sourceofexternal trigger signals.

In

the

POS

and

NEG positions, signals

are

appl ied

via

the

EXT INPUT

connector.Inthe

MAN posi-

tion,

the

MAN

pushbuttonisused as

the

trigger.

G) RATE switch:

for

selecting

the

rangeofpulse

repetition

rate.

G Rate

VERNIER:

for

continuous

adjustmentofthe

repetition

rate

within

the

range selectedonthe

RATE switch. Clockwise

rotation

increases

the

pulse

period

(reduces

the

rate).InTRIGGER

mode,

the

rate

controls

have no effect.

o Mode

switch:

for

selecting

the

modeofoperation

of

the

rate

generator:

NORM-

rate

generator

free-runningatselected

repetition

rate.
TRIG-

rate

generator

outputisshaped

versionofinput.

Inputiseither

via

the

MAN

pushbuttonoran

external

signal

into

the

EXT INPUT

connector.

EXT

GATE-

gate

signal

turns

rate

generatoronsynchronously.

Repetition

rate

as selectedonrate

controls.

Gate

'iignal

either

via

the

MAN

pushbuttonorthe

EXT

INPUT

connector.

Max. gate

frequency

150

MHz.

INT

GATE-

external

inputisdisconnected.

Gate

signalispro-

vided

internallybythe

word

generator

module

and

Figure

3-1.

8081 A Controls and Connectors

(~)

turns

the

rate

generatoronsynchronously.

Repeti-

tion

rate as selectedonthe

rate controls.

MAN

pushbutton:

for generat;ng

external

trigger

signals

wheninTRIG

and

EXT GATE modes.

The

NEG-POS-MAN

switch

must

be in

the

MAN

posi-

tion.

EXT INPUT

connector:

DC

coupled

input

to

which

external trigger/gate signals

are

applied.

Input

impedanceis50

ohms.

Maximum

input

level

;s

± 6V.

TRIGGER

OUTPUT

connector:

provides negative

output

pulses in all

modesofoperation.InTRIG.

mode

the

output

pulses

are

relatedtothe

trigger

input

and

not

the

repetion

rate

generator. Maxi-

mum

external

voltage;s± 2V.

SECTION 3

J

'-----------------------------

OPERATION

3-1

INTRODUCTION

3-12

Initial Control Settings

3-2

This operating section explains the

function

of

the controls and connectors and describes

the

opera-

tors checks and

typical

operatingmodesofthe 8081 A

300

MHz Rate Generator module.

3-3

Panel Features

3-4

Front

panel controls and connectors

are

shown in figure

3-1.

Description numbers match the

numbers on the illustration.

SOSl

A:

1

RATE

range switch

300-100

MHz

2 Rate VERN IER

CCW

3 Mode switch NORM

5 NEG-POS-MAN switch

MAN

Oscilloscope:
Sensitivity

100mV/div

Trigger Channel A

Timebase EXPANDED, 1ns/div

3-5

Operator's Checks

3-13

The

repetition

rateofthe

output

should

be

approximately 300 MHz.

3-6

Use

the

Operator's Checks (paragraph

3-91

to

verify

that

the

SOSlAis

functioning

correctly. The

SOSl

A mustbeinstalled inanSOSOA

Mainframe

for

these checks. Thusitis

importanttoremember

that

any

fault

thatisfound

maybein the

BOSl

A Rate Generator

or

the

80S0A

Mainframe.Ifthe mai nframeissuspected,

carry

out

the

SOSOA

Performance Checks.

3-7

Operating Instructions

3-8

The Operating Instructions (paragraph

3-21

I consist

of

a numberofprocedures

that

explain in

detail the

functionofeachofthe

80S1

A controls.

All

operating modes are described. However, 1nternal Gate

mode

can

onlybeusedifan

8084A

300 MHz Word

Generator moduleisavai

lable.

3-9

OPERATOR'S CHECKS

3-10

The test

set

for

the Operator's Checksisas

shown in figure

3-2.

The 8081 A Rate Generator mo-

dule must

be

mounted inanS080A Mainframe.

3-11

Set theLINE switch 9 on the

8080A

Main-

frame to ON.

3-14

Turn

the

rate

VERNIER2fully

clockwise.

The repetition rate should

be

approximately 100 MHz.

3-15

Repeat repetition rate checks

for

RATE

ranges

100-10

MHz and

10-1

MHz at the

CCW

and

CW

positionsofthe rate

VERNIER.

The

repetition

rates

should

be

approximatelyasshown on

the

RATE

range

switch.

3-16

Switch

off

the oscilloscope. Replace the

oscilloscope sampling

plug-in

with

real

time

dual channel

vertical

and

timebase plug-ins. Reconnect

the

TRIGGER

OUTPUT 8tothe channel A

input

and switch on the

osciIloscope.

3-17

Repeat repetition rate checks

for

RATE

ranges

1 MHz

-100

KHz,

100-10

KHz,

10-1

KHz,

1

KHz-l00

Hz

and

100-10

Hz at the

CCW

and

CW

positionsofthe rate VE RNI

ER.

The repetition rates

shouldbeapproximatelyasshown on the RATE

range

switch.

3-18

Set

BOB1A

mode

s'.'vitch3toTRIGand

press

the

MAN

pushbutton 4

several

times.

3-19

Output

shouldgohigh when

buttonispres-

sed

and

low

when

buttonisreleased.