Wavetek 184, 183, 185 Service manual

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TITLE

CALIBRATION

MOOEI-

NO.

193r184r185

CODE

IDENT

23338

TEI<

PR,OCEDURE

NO.

DWG

sAt

DrEGo

SHEET

scALrFoBtutA

'?

REV

OF

7

l:d?\

:

l

:ii

.,i

Calibration

The

piocecures

ient

foj-lowing

independent,

is

.ej""tment,

setting

lla:n

ire i:-li.:.nary

Before

cor.trcls

rfi,EQ

Frequency

FREQ

SY}TMETRY

GEN

rrcuit

-f

connecting

as

(Hz)

Dial

(tiz

ITIODE

\IERNIER,

)

Instructions

paraEraphs

f6r-Mode:

of

irowever,

Board

Procedures

follows:

(s)

Calibrati.on

the

ie3,

its

hdy

unit

provide

and

184

following

dependent

be

an

to

x10K

5

Itlax.

NORMAT

COITT

CW

complete

185.

adjustmelt

on

sourcer

ac

(CAt)

(I,

rN.

Mode1

seguential

Each

calibration

previous

set

5

18

)

ca}ibration

settitg";

adjustment

front

the

adjust-

an

panel-

s*td-

*6

tl:AIIEfORI\n

.ej{pt:TUDq

;*,1FI,ITTJDE

STEET

ST.ME?

B$CTE:

M*DE

TII{E

If the
calibration

Fower

Eef

voltage

the

SupplY

con$ect,ing

ore

t*

c5rr4r*esition

(dB}

VARIABLE

unit.

Regulatiot:

r

Inake

sl-1re

l:es

Pots

t,i:e

never

to

un,it

the

shown

as

(no

ir

-24

Max. CTV

SI{EEP

om

100s

l"

(Mode1

been

center

an

to

230

l- 5

/

in the

f set)

of

i"

START

185)

(l{odel

caLibrated

rotation-

of

source,

ac

HI

and

following:

,i

183

/fC

,

L84)

and

before,

check

switches

tl:e

are

set

ac

all'

l-ane

ea& *$

U$

ULe v

\,

,AC

L.ine VoLtaqe

Switch

A

Switch

B

Fuse

(SB)

g0 o

iCS
iEC

:

*:

;l;::n€)ct

cepacitor
supply)

Ccnnect

11206

Chec!: voltage

shoulc

Chec}:
shcu]-C

Keep

110

c

125

G

72A
?50

­a

voltmeter

)

,

.

ac

power

in

be

-I5Vdct

voltage

+5Vt

be

generator

the

and

power

suppl1'

at
at

2

5

least 30 minutes

keep

cover

closed whenever

Eround

other

the

and

the

15 0mV.

the

OrnV.

correred

before

115
115
230
230

turn

obtain

to

I'

rr

-

n+ I'

doing

lead

lead

on

to

the

+15Vdct50mV.

side of

and

of

a1low

side

the following

possible

r0

EI

LO

Hf

to GND

rra

rr

side

side

generator.

(

18

C

C80

a

(a

the

during

of

C84

of

C8

Ad

10

0

uF capacitor)

100

uP

(

4

j

ust

capacitor)

unit to warn

calibration.

calibration.

L/4

amp

L/4

amp

L/S

amp

L/8

Ermp

(a

100

u^F

+15

the

volt

potentiorneter

It

.

ft

.

up for

at

Also

,{

c.

l-'

.e,

a.i

s**a

*a

Anp3.ifiers

Set

GEltr

t5ntr' at

z1!{FLITUDE

Set

:rir.inur:.)

chm

5

0

Set

FI{PLITLIDE

t

3-Cm!i at

Repeat steps

{*

Tin:e Symmetry

Set GEN

FREQ(Hz)

A and B,

Offset, Ai,justment

!{ODE

anplifj.er

,*Ja anC

ao

(dB)

to 0, VARIABLE to

WAVEPOR}4

cutput

(emitter

. Adjust F.i56 for 0 volt

load)

II{ODE

.

VARfAFLI

50C

t,he

-"t

CU: .

ani

Adjusi::ent

to CO}:l

at

XIK.

of a dual

maxirnum

tc

o::ee.

/

(LIX,

Conneet the

channel"

t\tode1

oscilloscope.

,1v'

to

. Adjust

of

rnaximum

tlomv at

CI^tr.

L85), lrlArrrEFORM

50n

OUg

Adjust

signal

Q19)

CC'W

the

RL92 for

.

(amplitude

50Q

OLIT

R124 for

to

to both

?

(intc

0 vclt

,

channels,

volt

d"

Set

internal

to

oscilloscope ti:e

the

at Inverted.

al,teinare,

and

base

to

Channei

20uS/division,

A at Normal

and

scope

trigger

Channel B

Adjust freguency

approxj-matelv

by

Sweep !{agni-fier"

following

figure).

Cial unt,i:-

one

cycle

of the

scope

the

(5

osci3.loscope

kllz).

(see

Then switch

set-up and

screen is

ON

the

display

filIed

nX10

in

the

Aclr3st

1e

n

tJ..Lvt

Turn CFF

FRIO(l{z)

2

R3

unt,i l"

{the

space

sco?e "::l:

the
tc X10C}:. ;i.,.:s:

the oscilloscope

(5

kl{z)

.

":t;

s

tha

,r t

.

ao

q

a-

­w

s.r{-ac:

f

?

'5.
\r

e:,?

a

:­q-

!!,.'$e''

:hr

:

i:-,eC

-.

'l

f.;i

?r^t

i $-...

r

q

#

rn*.-.

' *''

1-.

*a

! ,i_

n+t-

$

s

33s

-

f

t\
dq

!.r

.-

rcl\"i-;

)'-::1if1e1''.

ire::r:e"

:" aDnrox:.nately

iTreir],

,^3

A

1L

L/i.

Se+-

iiai

DWG

to better

Civision)

generator

the

and

I'ER}IIER

one

NO.

then

o

u::til

cycle

6.

7.

8'

2.5

9"9

0-1t

similar

"y*.i"i.

Repeat

with

steps

th:.generator

if:T8.-ii

Sine

Distortion

procedure

1

through

as

1til]

G

al

'ove'

once.

set

at

and

adjust

t!:.:*"

:ff#:Ult"i;:gffifr'siriii

ACjustnent

R35

for

better

coacition.in

rr:iil*Jr,o.tins

than

step

5,

ina-openins

b

3'

bF

.-.e

-

-a

i.

2.

SCt

F.REQ(IIZ)

::r*ff:.:l:

Adjust

less

RIlr.

connect.a

l6g-and

th

;;t"*lil|*,

10

tO

X1K,.1?RI.]IER

son

a'ur-'to

RZj.

for

othenqiJ.-i.irJ*'

Ko

trim

At

a

ai"toiti;-'.;;i:,,;;

riintmun

pot

in

ffiff'.i.ii:ili";:c-*:5.;*3i:i=

;:::

If

and

just
tcrticn.

Check

0.

High

Set

the

using

:::"xl

0.169

F.I13

rhe

Cistorticn

2t

.

Freguency

FREQ

sf;uare

C64.

T";iil.rj

distortier:

and

connect

two

t,ri;-J"t=

RepLa""

Dist,crtj.

(Hz

ro

)

wave

Xll':r
rlse::-c

at

iir.

"{::

st:.

a

anr

Fc:s

c:-

ij.e_

l:

5C:

::

t:

l:

:

i:

3e::,n:

*"

i^

i'r

\--ri-.

Er rq

;:::,.o:t

-_

j.

!',

*

] F,*,-

j

l^

--

.

-.

r

-.

CAL,

iiAi

At

sine_:i:tortion.

procedu."-u"io,

eac!:*iccat:-o.

-i"c-i;i'-io

='s

"'i

i

ii..

l!.*iff

i:;

t

5g

'

*^

r-

:I:*

rrei

s

Lan;ar:

'.-f

i

;-q.'-

o

.r..r

,

Gr

a

n^i-

PUC

F:

":

t=ii.1Dr

ln':

c!:

I:

:

ie,u,e

L!:

fc:

ilgi.:

shoui.i

h

i::

j

,

eaCL

:-ess

!:

illUf,

5,

WA\TEFORM

ioaoea

It

to

with

shoulC

select

narked-.Rrll

obtain

':::Tj.

remove

lOCati.n.

rhen

res:.stors

be

botl:

o.

r6t

.

less

Adjust

"

overshoot,

tO

a

so

be

anc

ress

i"u

E1].C

Ai­cis

thar

ohm

RiLz.

than

-

d

['

fi
ir

.!f

t.
ti

B

E

t1

#

['

tr

t

E

t'

t:

Set II?VE|OR1{

in

a

s:)ectrun

f

ron:

L

!{I{

f

ol,

1c;'-'ing

i!- Iii:,:ff.:'l:

triangle

*i".:o.*.

z

.

tc

anal!,ze:.

to

;"'ii;

!i:':;':l;'

--cJi.^i-I

ffii:";:=':;;::i;li:

.

,

:

rrci:ier,

cllC€s'e

l*r

'.'1

\.a\-

{n

--

-:e'riiii

l"

.

:l:eck

i..^rr'!

e

--...Uu:c

i-s

not

*:":_rrequenel,

:F,i'a'fi.'i:.i::=;'ii

DUYG

^'

be

met,

cr

rottloit

sine

bglow

Cistortior

_32

do

th;

diar.

accurae",,

ot

:*i;-:li,ilS^:iii

NO.

?

CB

the

I

flatness

check

To

freguency

the

oscilioi.opn

bandwidth)shouldbeused.sccpeproleshouldbecorrectly

compensat.a

2

"7

1

l.

PrequencY

T^IAVETORM

SCt

output

frequency

"ia-iti

Calibration

tI>

tc

of

xlO

a

ald

grounc

F'Rf,C:{i{z}

,

5CKliz3tr00I{2,

leai

"{c

siope

length

uslng

Peak

}:iC"K

triangle

the

voltage,

probe

shoul'C

dial

and

R2}.

(exceed

keep

to

high

-a

150

minimum'

to

5.

llgz

Adjust

6

&,

3.

1.

q
Jo

FREQ(Hz)

Set
using

tion

Repeat

set

Lisingr

t"ion

Chec!:

if

rREQ

if necessarY.

better

I'REQ

set

siquare

the

dial

Set

Checil

c3:

Che

licdr,-

q:

rf,h

l

,l'lgr

'JL.r

.

'i.15

-\-.-"'

inr

to

C22

CI7.

tcf:ing;-ci-=

necessarY).

)

(ChanEe

It

lfal"e

5

t,o

1

n+.

\r:ari

F;l.?Fl

3r

f.

t*j*

r.-

.

I
tc

to

stePs

(Hz

f

reguencir

than

(Hz)

reqi.lexc:'

f

f

requenc:"

i85

#

t,t'-'

6

11,2

XLM.

ani

ani

ea

,

rr

,

"'

f

e

*

2 cnce'

c:(.

)li-0

Cie

)

rangic

nc

]:1C

,

t::'t

l:*.;

L

rer.;

?
.a q j.*.l
i;r.

id.

*

&

!'

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v.U b

-

rlrt

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t.-irffe:er.:

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:

:

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4'a3

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LIK'b

frequency

r-alue

L,

to

freguency

value

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i

-

{:

tc

square

?,,2

then

t'/<

5)

HII*1

j

i"al

f recruency

5MHzt2OkHz,

!9

achieve

to

ichieve

to

XI0K,

wave.

0.1E

,

(or

for

ranges.

0,5'(lroc

at

t*

,r'

calibra-

the

500kHztIkY.2,

the

tYPicall1'

ACjust

2

{

-.'

OmS

to

R92

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Xl

-,

''

-

scale]

)

using

001

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51't'"t50!{z

j

calibra-

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rel:ges

,

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NO.

iai.

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:

t

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4.

connect

speed
between

of

ro

the

*ritnitt

signal

the

100

SVIEEp

ramp

signar

tlOinv,

to

on

OUT

-F.'LI1P

the

sweep

SI'IEEP

at

iz--upproTilllg1y.

CONT

STOi,

rising

anc

equal

ngZ

oscillOsCope,

to

Swrrch_r.he

adjust

and

sweeP,slop

Board'

set

swEEP

the

vo].tage

MODE

positive

the

switch

level

sweep

peak

to

4.0

1.

qfi

v'lV

J-"

t,lode]'lS3andtS4SweepCi"rcuitCalibration

Connect

speed

hetraleen

the

of
within

l4odel

Set

the

on

when

checl;

near

the

to

s#ip"ir;;";i

,i",p-"ig""ur

tioi,v,

Ig3

PREA(fi,2)

XCG

generator

that,

every

frequency

boaicl

nai

signal

at

SI';EEF

ou:

iio-iI"I;p;;*;;rery.

Bwr:r

to_the

SweeP'

on

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adjust

calibration

MODE

cgl;

4,

A.A.

'lz

5

C

a

i,

J

tc

nct,'

seLicned

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t-EL'

t

f reguenc]t)

i-

crystal

t.he

it

o

sweep

the

voltage

XeG.

to

(

r,no

F^z

be

may

or

r

.",::-tl:..

!!oDE

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positive

level

Adjust

should

.

reguency

f

to

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R

on

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swirch

peak

to

bs

at

the

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the

14

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3.0

3.1

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Purpose

This

specification

Department

formance

and

satisfactory

General
unress

generator

manual

Specificaticn

otherwise

shouri.

or

the

Additjonal

Output

Maximurn

into

LcaC

AI\IPLITUDE

20

PULSE

an

up

dB,

OUT

Amplitude

output

open

to

VARfABLIi

10:1.

is

used in

to

guide

ensure

for checl:incl

as a

concliticn prior

specifiec

;;eet

all

SpecificaLion

Specir

10 kIIz.

icationl

of

1_r,

circuiL

7

a;

&.nG

wilL

the Itarretek

gcnr:rator

the

to shipping.

in the following

pubr:.shcd

thc

Control

nt !

' 'v'

,

gree{;er

var],

l-si

than

output

out

the

is

opeiating

specifications

Drawing

greater

9

.

voJ.,.:age

euality

generator

paragraphs,

No.

B

\tp-p

than

19.6
into

by at Least

Control

per-

to

its

in

Vp-p

50

the

the

ohm

3"3

?A

.JC

Voltage

than 3.5

Frequency

tl.6t

I{ith

of

dial

at

the

voit

Aceuracy

full

at maxircum

is obtainahle

lo

or

-Js*

fron

setting

O.1l*t{,to

,0,

XCG Frequenc:,/

Itlhen

inc'.ex,

f

k'rec{r:.ency

clach rne::k

rlf

ef

ence f

the

is

lTencratcr

f

PI,lI,Sn

int-c

sca.ic-, frc:l

atdji:sti::q

by

with

5.0,

AccrJ"?:;rey

on

thi:

eclt:(::nCy

f;}.cc1.1rf,:t*

CU?

i"

t;[.r]I:

c:.rcui-'{:

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flt

cli?,

ciar

{LOG

-

at 0.5

rric\de

dj.*i

f ::r:{lltcnc}r

t<:

s f

least

the

j-s

ronr

0

volt,

.

i:c

)1100i( r:ange,

L,z3-000th

VEItliI[F..

Lo

and

**ot

irroci.ei

l.inrjC

\rj.

I85 on-ly).

up

l-

1

iock

co{-# i n,rr

r-,

\irith

v lu v-cl.a

+250

mv

greater

to

LIld mode.

of range frequencl'

setting

with cjiaL

the freque:"r*y

io

t,he

a

cry

stai-

qt

I

s

:l

!{

t

S{

t

Et

E

!E

Pg.

2

,Of

3

ry..rh'r-r

/rI

I

BZ*sci.

ra

E

w

l

fj

$t:-V

Sine

tr{ave

Distertion

3,6

3.7

3.8

Less

-32

Time

Less
Less
Less

Mode1

Time

Frequency-

ratio

Symmetry

mod,els.

Trigger

check

rnaximum

than

dB

from

Symmetry

than
than

than

I85.

Symmetry

is

Baseline

trigger

CW and

0.38

0.58

f

t1ltz

I

(Sylti,rITity

from

38 from

58 from

(S?FII-IETRY

accrlracv

17:1

ratio

or

varied

baseline

0 clB

rom 50

to 5

lrz

tl}is.

at IiORMAL

1:1

to I0:1

10:1

1000:l-

1:IZ

to I000:l

Oti)

is

!202 rvith

minimum,

with

Variation

at

and

output

50

to

kIIz.

and FREe(Hz)

of

range.

of range.

to L00,000:r

dial

rvith

dial

VS Frequency

rvaveform,

\

loaded

diaL

setting

AlL

of

at

TRrG

with

harmonics

range

5.

Maximum

at

5.

is

normal

ltoDE,

a

50 ohm

XI00

on

LoG

in

berow

to X10K)

mode,

symmetry

these

AMpLrruDE

terrninator.

voltage

than

100

Less

mV

than

fron

t50

top

mvrlc, dial

tc

I/J.CAO

at

5.

of

frequency

vortage

ringe.

variation

less

.r

{

I

I

I

I

t

Pg.

3

of

NO.

DWG

3

AIB2-501

Model

183

Generator

Model

184

Sweep Generator

Linear

Sweep

Model

185

Sweep *Enerator

5

MHz

5

[b{Hz

XCG/Sweep

MHz

5

With

Lin/Log

$[EGlffim

MODELS

VERSATI

Waveforrrs

Sine

p*t+"il.;e

rarr\S

Operatirq Modes

Continuous,

(Model

FreguencA

0.00G'l

ranges.

Model 185

tion

lapping

Frequency Vernier

Linear

Logarithmic Mode:

183/184118s

LITY

*U

triangle

,

pulse

''1,

TTL

,

triggered,

183 has

Range

Hz

to

Only:

of

0.005 Hz

5 decade

Mode:

square

\

,

negative

J-L

,

pulse

J1

gated,

XCG mode also.)

MHz

5

in

10 overlapping

Logarithmic

to

MHz

5

ranges.

Range

range.

la/o of

5%

range.

of

pulse

and DC.

and

distribu-

in

tl,

lf

su\reep.

over-

5

Main

Output

,

\

able from

50S)).

able

into

Voltage

-60

TTL

TTL

and

^.,

J-.

t10V

to

S0Q)

Attenuation

in

dB

Pube

Output

pulse

fall

tirnes typically 1S ns.

variable.

DC

Offset

and DC

Waveform

through

able

tl0V

tween

as

offset

or Vdc output.

GCV

Output

+5V

to

0

frequency
ance. For

VCG

Voltage

-

lnput

Range: 0

t nput !

mpedance:

184);

Output

mode);

Model
Linear

ko

1CI

Frequency:

1 00,000:

185).

Slew

Logarithmic

range

in

200

40

lls.

Linearity:

Logarithmic Response: 1

Sweep

Sweep

start

precise

for

Models

183 and 184:

of

1

nns.

1

frequency;

85: Linear

sweep

to

Model

logarithmic

frequency;

in

steps, or triggered
step;

sweep/step

in

ranges.

S

Sweep

OUtpUt:

ramp

or

stair step,600S).

Trigger

I

nput

Range: 1 V

lmpedance:

Pulse

Width:

Repetition

HORIZONTAL PRECISION

,

Dial Acorracy

,

0.005 Hz to

0.0005

t2%

and

ication.)

spec!f

Tirne

Symmetry

!1o/o

from

VERTICAL
Amplitude

Less than:

Hz

of

PRECISION

Change

0.1.d8

0.2 dB

ldB

-L

selectable

,

20V

,

max

20

dB

at

Drives

p-p

"-l-

steps,

generator

up to

rnax

selectable

(tsv

0

to

plus

(10V

into

-80

20 dB vernier.

frequency;

?C

Output

offset and

DC output

SOQoutput. Adiustable

(tsv

max

open

circuit. Proportional

of main

use as a

Controlled

(Moder

Rate:

Slew Flate:

80 to lOOo/o

|lr;

0.0001 Hz

and

stop

limit

sweep

into

generator;1

horizontal

Generator

tsv.

to

(Models

kSl

5

185).

Up to

(logarithmic

1

2o/o

ot

to

50

decade

frequencies

adjustment.

1000:1

range

0

Continuous linear

sweep time

(3

(5

decades max);

decades max

continuous, in

for

one

of 100s to

pF.

minimum.

maxirnum.

!2o/o

!4o/o

Hz

(See

XCG

kHz.

500

Frequency

kHz to

100

MHz to

1

sweep or

(open

of

0

tlme

+75V peak

peak-to-peak

10 kSl,33

ps

5O

Bate: 5 MHz

MHz

5

to

0.005

f

ull

scale.

to

0.005

With

and

p-p

and vari-

50Q).

dB: To

Symmetry

TTL

50O load)

kSlimped-

drive

signal.

1

83

(linear

mode,

per

to

8oo/o

range

of

kHz,

per

are

of

up or

series of

100

circuit)

+

t

0V

fult

reading,

of

precision

(Sinel

to

100

1

5 MHz

vari-

into

rise

loads.

select-

be-

and

|Is.

of

O.1Yo.

volt.

held

100s

or

)

down

10

one

tls

.

scale.

kHz

MHz

Step

Attenuator

10.3

'stability*

Short

Long

*Amplitude,

linear

Amplitude

to 1

O

XCG

PRECISION

Accuracy

+0.0t

uod<

Time

X

1K thru

X

100

X

10

WAVEFORM

to

Distortion

Sine

Less than:

A.5o/o

1oA

All

1 MHz

Triangle

tor

harmonics

Greater than

100 kHz.

Wave

Square

Less

than 30

in

ENVIBONMENTAL

Specif

strument

MECHANICAL

Dimensions

11%

high;

Weight

lb/3.9

8.5

Power

to 110V,

90

or

210

25 watts.

ITOTE:

lOWo

of a selected

symmetry

affect

freguency

sible

asymrnetry

guency

setting.

ORDER INFORMATIGN

(FOB

San

Modet

183

Model

184

Model

185

Terrns

',rt6

Accuraqf

per

dB

ZA dB

10.05

:

Term

tO.ZSolo

Term:

dc offset,

mode.

Synnmetry

MHz

of amplitude

,1o/o

(Model

o/o

of

each XCG

top range

range

range

PURITY

for

10

Hz

to 100

0.005

Hz to 1

at

to

MHz.

5

Linearity

99o/o

Rise

and

ns

terminateci

ications

in./28.6

1A3/a

Specifications

apply at

will

operate

crn wide;

in.l27.3

kg

net;

105

to

250V;

frequencv

control CIff

calibration.

r.s

Diego)

10

da1.s,

ne:"

step"

o/o

f

or

1 0

tor

24 hours

and

183

setting.

Less

kHz

MHz

least

30

f

or

0.0005

Fatl

Tinre

25cC

frorn

sii isr.lI4.E

cm

deep.

12 lbl5.5 kg

to 125V,

400

50 to

apply

range

Symmetry

"

Maximum

dependent

ciag..

"${i

rn inutes

frequency

range.

Onty!

than

Less than

Less than

dB

down

into

50,f) load.

l$"C.

OoC

to

shipprng.

iBO to

tess

Hz;

from

and wittt

and vernii:r

upan

SO0

llz

+50''C.

220\,/

than

l0

p()s"

frr:"

$cs5

$495

$5S5

3!V5

in

ms

Es

SOs

for

to

ln-

cm

rCI

l

rii

,

rfr

a

I

"HCDTF'"ICATION

foiiorn-ing

ih"

became

182-1108r

OF

rnodifications

i' Cscillation

output.
li.Y.

?

,tr

C

oscillation

9I_x-0q1

3.

Added

waveform

1.

Generator

TRIG

a.

and

Free

SYM

Fixed

switch.

range

a

100

at

is

GATED

running

pot

MAIN

shown

by

shown

is

p!

in

X1

MHz

free

mode.

is

defective

BOARD

on

adding

on

L82-110A

\^rere

output

a

triangle

selected.

paralrer

range.

running

with

syM

done

waveforms,

61.9

ohm

waveforms

rixea

with

with

R52

d,istorted,

control

on

1g2-L1oA

more

series

onry

by

addin!

to improve

triangLe

at

NoRtvIAL

p.c.

..

obvious

with

c3g in

when

a 0-oi-rr

the

means

board

at

x.1,

ani

-60

the

x.01

b.to..r,

triangle

waveform

that

the

its

a:

b. Free

5.

A

0.01

reduCe

A

6.

47

7. R138

neans

and

Moder

of

SYM

pf

was

running

shouLd

Q8

pot.

uF

the

was

removed

the high frequency

maxirnum

capacitor

8.

A 100

smooth

VARIABLE

ccw

ohm

the

at

is
resistor

at a

SYM

the

L42.

allow

to

control

replaced.

be

A 1.5 Kohm

less dependence

capacitor

noise

added across

at

and a 0.01

waveform

position.

removed.

lvas added in

peak

of

maximum

the sine waveform

particular

pots

resistor

was added

GCV OUT.

the

R4

to improve

uF

when

Distorted

position"

CCW

setting

are

very

However,

was

on

to

the

was added

ampJ-itude

square wave

series

far

the

added

the

base

the

with

at

low

of

pot

the

frorn

can

to

SyM

tracking

be used i:.

the emitte:

tracking of

emitter

fast

to Rr46

vARTABLE

if

R148

of

sweep

to improve

the

and

leveI,

control

the

to

Q4

respc:se.

is

at

0.01 uF

R15I

amprituce

tc

""ss{

-'.t

,.:1i

:]

)':

$fodifj-caticn

9.

Excess

range

switch.

:.'i.

1l-.
L2.

senerator
Level

was

set

mod,ified.

?rigger

the

base of

The

two 33

cuit

noise.

because

to 182-110A

frequency

fixed

by disconnecting

is free

at a

base

particular

Line

Q42.

pf

caps ldere

they do

e

continued

jittering

running at rRrG

at

1/1000

position.

oscillation

rernoved

harm more

-

than

the

mode

fixed

in

the

of

group

with

The

by

power

good

freguency

the

pa.th

near

the trigger

squaring

adding

supply,s

powei

on

the MODE

ciicuit

a 33

suppl-y

pf

cir-

to

Kwok

4/tL/75

S.

fi.)

Lo

R,ru6'^/G

ctlLtt(rlt)

ro

N

o

0'l

+ltt

oF

5t)

P

(tes)

c?

y

o

n)

lil*tl

flRD