Kenwood TS-120S User manual

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5

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OPERATING

MANUAL

INTRODUCTION

You

are

the

owner

of

our

latest

product.

the

new

TS-120S(V)

transceiver.

Please

read

this

in-

struction

manual

carefully

before

placing

your

transceiver

in

service.

The

unit

has

been

carefully

engineered

and

manufactured

to

rigid

quality

standards,

and

should

give

you

satisfactory

and

dependable

operation

for

many

years.

AFTER

UNPACKING:

©

Shipping

container:

‘Save

the

boxes

and

packing

in

the

event

your

unit

needs

to

be

transported

for

remote

operation,

maintenance.

or

service.

©

The

following

explicit

definitions

apply

in

this

manual:

Note:

If

disregarded

inconvenience

only,

no

risk

of

equipment

damage

or

personal

injury.

Caution:

—

Equipment

damage

may

occur,

but

not

personal

injury.

CONTENTS

SPECIFICATIONS.

3

SECTION

1.

FEATURES.

4

SECTION

2.

PREPERATION

FOR

USE.

4

2.1

ACCESSORIES:

4

2.2

INSTALLATION

4

2.3

INTERCONNECTION

5

2.4

ANTENNA

AND

POWER

SUPPLY.

6

SECTION

3.

CONTROLS

7

3.1

FRONT

PANEL.

7

3.2

REAR

TOP

PANEL

9

SECTION

4.

OPERATION.

10

4.1

RECEPTION

10

4.2

TRANSMISSION

"

4.3

VOX

OPERATION

12

4.4

SEMI-BREAK-IN

OPERATION

13

4.5

FIXED

CHANNEL

OPERATION

13

4.6

CW

OPERATION

14

4.7

MOBILE

OPERATION

14

4.8

FIXED

STATION

OPERATION

7

4.9

DIGITAL

DISPLAY

CALIBRATION

7

4.10

ANALOG

DIAL

CALIBRATION

7

SECTION

5.

ADDITIONAL

INFORMATION

18

SECTION

6.

OPTIONAL

ACCESSORIES.

19

SECTION

7.

CIRCUIT

DESCRIPTION.

2

BLOCK

DIAGRAM

22

SECTION

8.

TROUBLESHOOTING

23

SCHEMATIC

DIAGRAM.

29.

31

INTERNAL

VIEWS

.

30,

32

TS-

1208,

TSs-

120V

SPECIFICATIONS

relates

(a0

dent

sorta

700

TO

ti

ae

|

TS-120S

TS-120V

ues

T

TS-1208

TS-120V

7

80~

15m

band

|

200W

PEP

for

SSE

operation

16OW

DC

for

CW

operation

160W

PEP

for

SSB

operation

|

140W

0¢

tor

CW

opera

|

2ew

PEP

tox

S88

operation

20W

DC

for

CW

operation

25W

PEP

for

SSB

operation

20W

DC

for

CW

operation

10m

band

ALC

INPUT

Audio

Input

Impedance

Audio

Output

Impedance

~

162

Audio

Output

More

than

1.5

watts

(with

less

than

10%

distortion)

into

an

8-ohm

load

RF

Output

Impedance

502

Frequency

Stability

Within

100

Hz

during

any

30

minute

period

a

Within

+1

kHz

during

the

first

hou:

Carrier

Suppression

c

Sideband

Suppression

Unwanted

sideband

is

better

than

50 dB

down

from

the

output

signal.

Spurious

Radiation

Bettor

than

40

dB

down

from

output

signal

Harmonic

Radiation

Better

than

40 d8

down

from

output

signal

Image

frequency

better

than

50 dB

down

from

the

output

signal

IF

frequency

is

70.48

or

more

down

from

output

signal

0.25

nV

at

1048

S+N/N

or

better

—

10V

DC

max

(from

linear}

5002

~

50

Ki

warmup.

fter

1

minute

of

warmup

better

than

40

dB

down

from

the

output

signal

Receiver

Selectivity

ssB

2.4

kHz

(—6

dB)

4.2

kHz

(—60

dB)

“cw

0

SkHe

|

~6

48)

1.5

kHz

(~60

4B)

*

Optional

CW

filter

installed

Semiconductors

Dimensions:

TS-1208

TS-120V

Weight

|

_1s-120s

[___ts-120v

Ic

|

26 26

Fer

|

16

16

Transistor

|

30

84

Diode

|

142

137

241W

x

94H

x

2930

mm

(9-1/2W

x

3.3/4H

x

11.9/16D

inch)

241W

«

94H

x

235D

mm

(9-1/2W

x

3-3/4H

«

9-1/4D

inch}

TS-1208:

56

kg

(12.3

Ibs)

TS-120V:

4.9k9

(10.8

Ibs)

1.

SINGLE-CONVERSION

SYSTEM

USING

ALL

CIRCUITRY

The

single-conversion

system,

with

a

unique

Phase

Locked

Loop

circuit,

FET

balanced

mixers

and

MOS

FET's,

assures

excellent

spurious

and

intermod

characteristic

2.

BUILT-IN

DIGITAL

DISPLAY

The

digital

display

affords

easy

reading

of

operating

frequen-

cy

to

an

accuracy

of

100

Hz

on

any

band

and

any

mode

3.

BUILT-IN

IF

SHIFT

CIRCUIT

(Passband

Tuning)

‘An

IF

SHIFT

systom

is

built

into

the

transceiver

to

allow

shi

ting

of

the

IF

passband,

thereby

eliminating

adjacent

channel

interference.

4,

3.5

~

29.7

MHZ

AND

WWV

BANDS.

‘The

transceiver

is

designed

to

operate

on

LSB/USB/CW

in

the

3.5

~

29.7

MHz

bands,

WWV

(14.5

~

15

MHz)

is

also

built

into

the

transceiver

to

permit

accurate

frequency

calibration.

5.

COMPACT.

LIGHTWEIGHT

DESIGN

‘The

TS-120S(V)

has

many

advanced

features.

yet

it

is

com:

pact

and

lightweight,

suitable

for

mobile

and

field

operations.

{as

wall

as

fixed-station

operation,

6.

EASY

OPERATION

All

controls

and

switches

are

carefully

arranged

for

easy

of

operation,

ensuring

convenience

and

versitilty

2.1

ACCESSORIES

The

following

accessories

are

furnished

with

the

TS:

12081V)

Instruction

manual

External

speaker

plug

7P

DIN

remote

plug

DC

power

cord

Fuse.

20A

(TS-120S)

4A

(TS-120V)

SECTION

1.

FEATURES

7.

ALL

SOLID-STATE

DESIGN

The

all

solid-state,

compact

unit

features

2

wide-band

final

Stage.

eliminating

the

need

for

peaking

controls.

8.

FOUR

FIXED

CHANNELS

Four

FIXED

channels

can

be

installed,

one

for

each

of

7.

14,

21

and

28

MHz

bands.

The

3.5

MHz

and

28

MHz

FIXED.

XTAL

position

can

be

exchanged

by

simply

moving

a

con-

Rector

on

the

AF-GEN

unit.

9.

FULL

RANGE

OF

AUXILIARY

FUNCTIONS

The

TS-120S(V)

is

equipped

with

VOX.

balanced

gate

system

noise

blanker

and

a

25-kHz

marker.

10.

OPTIONAL

CW

FILTER

YK-88C.

The

TS-120S(V)

permits

use

of

the

optional

YK-88C

CW

filter.

CW

semi-break-in

operation

is

provided

using

the

built-in

VOX

and

CW

side-tone

circuits

11.

WIDE

VARIETY

OF

OPTIONAL

ACCESSORIES

The

following

optional

accessories

are

available;

Regulated

Power

Supply

(PS-30.

PS-20),

Mobile

Mount

(MB-100),

CW

Filter

(YK-B8C),

External

VFO

(VFO-120)

External

Speaker

(SP-120)

SECTION

2.

PREPERATION

FOR

USE

1

2.2

INSTALLATION

It is

preferable

to

choose

an

operating

location

that

is

dry

and

cool.

and

to

avoid

operating

the

transceiver

in

direct

sunlight

Allow

adequate

ventilation,

particularly

during

mobile

opera

tion

2.3

INTERCONNECTION

Connect

the

transceiver

as

illustrated

in

Fig.

2-1

Microphone

Either

2

Tow

of

high

im

odance.

microphone

(5008

0.50

ka)

can

be

used.

The

PTT.

swrtzh.

should

be

in

folate

from

the

mic

sxcuth

(snown

ina")

Use

microphone

with

9

separate

Siteh

and

MIC

ne so

both

PTT.

and

VOX

are

avaiable

moore

DEBE

Meroe

E

Headphones

‘resin

Use

nescohones

of

4

10

16it

\mpedanee.

The

optional

HS

‘headphone

s

beat

site

for

use

wit

the

T5-12081V)

Stereo-tyoe.

hesdphones

can

‘also

be

usec

For

CW

operation.

connect

your

key

to

the

KEY

jock

at

the

rear

Use

shielsed

cable

Extornal

spe

wi

sea.

Conmect

Extornal

VEO

For

connection

‘rnal

VEO"120

“GND

terminal

Ieisrecommended

that

an

ground

lead

be

connected

t0

the

GNO

inal

atthe

rea"

Of

the

set

10

prevent

the

possibility

of

electric

hock

TVI

and

BC

sea

}OTE

connector

al

accessones

can

be

con

nected

to

the

T5-1208(V)

{twough

the

REMOTE

con

Besices

the

builtin

speaker

as

external

Speaker

can

lao.

be

rear

EXY

SP

jack

using

plug.

Note:

VFO:520

and

VFO:820

cannot

‘be

10

the

"a'l.

Use

a

microphone

with

8

separate:

switch

and

MIC

line

$0

both

PIT.

and

VOX:

ate

avaiable.

GND

terminal

leis

recommended

that

an

ground

Bie

Microphone

Either

a

low

oF

high

imped-

Is-10v

rsenones

of

410

160

{ance

microphone

1500210

HS.

Ott

can

be

used.

The

PTT

best

sited

for

switch

should

be

insolated

TS-1208(v

fromm

the

mie

cxcut

(shown

ip

Stereo-type

headphones

can

algo

be

used.

Fer

CW

operatan,

connect

Your

key

So

toe

REY

Sach

ot

erat’

Uae

Seted

cate

mit

=

the

supped

plug.

REMOTE

connector

tend

'be

comected

to

he

GND

Extemat

VEO

termina

tte

vet

of

he

sate

far

connection

of

dt

Drover

the

possi

of

seco

fa

ve0.

190

Sock”

a

Pana

se

frm

Note.

UF0:820

ane

Short

and

neary

a

lad

2

bose

120820

canoe

“be

re

aya

lead

3

Poss:

Fig.

2-1

Interconnection

of

TS-120V

pa

»

speaker

98

external

io

be

hed.

Connect

10

the

‘ear

EXT

SP

jack

using

External

accessores

can

be

conn

ected

fo

the

TS.120SIv)

through

the

REMOTE

connector.

The

PTT

{erminal

and

be

usod

for

remote

control

of

sand/recewve

operation

2.4

ANTENNA

AND

POWER

SUPPLY

Connect

the

antenna

and

power

supply

as

shown

in

Fig.

2-2

for

fixed-station

or

mobile

operation

stallion.

see

Page

17

Lightning

TS-1208

af

——

Grey

Biack

$=

0

power

torminat

on.

see

Pag

For

fined

station

antenn

ins

lation.

see

Page

17

rents

Min

TI

Pe

HN

|

LPO:

=

mb)”

Note.

Use

esher

tatery

of

regula.

3

supoy.

but

not

ruchons.

see

Page

5

2

sewtsr)

Fig.

2-2

Antenna

and

Power

Supply

Connection

of

TS-

120V

16

ANTI

VOX

CONTROL.

39

DELAY

CONTROL

VOX

GAIN

CONTROL

fsusoiaL,

@oeren

D

OIGITAL

DISPLAY.

@

stanosy

*

switcH

3

MODE

SWITCH

‘9

Mic

CONNECTOR

@

PHONES

JACK.

D

vox

switcn

@®meren

swre

———___]

Fix

switcH

———_—____]

{1

MAIN

TUNING

KNOB:

SECTION

3.

CONTROLS

~

TANT

wnoicator

SCARIER

Levet

cONTAOL

MIC

CONTROL

DAF

GAIN

CONTROL

IDRF

GAIN

CONTROL

BAND

switcH

1)

SHIFT

CONTROL

a

PowER

switcn

2)

NOISE

BLANKER

swiTcH

#

CALIBRATOR

SWITCH

——

#p

nit

swircx

—

WRIT

CONTROL

Fig.

3-1

Front

Panel

3.1.

FRONT

PANEL

D

METER

The

meter

has

three

functions,

two

being

selected

by

the

METER

switch.

In

receive

the

meter

is

automatically

an

S-

‘meter

showing

receive

signal

strength

on

a

scale

of

1

~

9.9.

+

20,

+

40

and

+

60

dB.

In

transmit,

the

meter

shows

IC

(TS-1208),

RF

output

(TS-120V)

or

ALC

level

depending

‘on

METER

switch

position

2

DIGITAL

DISPLAY

The

digital

display

indicates

true

operating

frequency

to

an

accuracy

of

100

Hz.

3

MODE

switch

The

mode

switch

selects

type

of

operation.

\sB

Used

for

lower-sideband

operation.

(LSB

is

‘most

common

in

the 3.5

and

7

MHz

bands.)

use

Used

for

upper-sideband

operation.

(USB

is

‘most

common

in

14,21

and

28

MHz

bands.)

cw

Used

for

CW

operation

®

STANDBY

SWITCH

This

switch

selects

receive

or

transmit

function,

In

the

REC

position,

the

transceiver

is

normally

in

the

receive

‘mode

unless

the

microphone

PTT

switch

is

depressed,

in

the

SEND

position,

the

TS-120S{V)

is

switched

to

the

transmit.

mode.

CAUTION:

Do

not

transmit

without

an

antenna

or

dummy

load.

Equipment

damage

will

occur.

Such

damage

is

not

covered

by

warranty.

5

MIC

CONNECTOR

Connect

your

microphone

(MC-30S,

MC-35S,

MC-50,

ete.)

relerring

to

Fig.

2-1.

The

TS:120S(V)

accepts

both

low

and

high

impedance

microphones.

©

PHONES

JACK

The

headphone

jack

allows

use

of

4-to-16-ohm

headphones.

HS-4

optional

headphones

provide

optimum

results.

Stereo-type

headphones

can

also

be

used.

This

will

Gisable

the

internal

and

external

speaker.

7

VOX

(VOICE

OPERATED

TRANSMIT)

SWITCH

This

function

is

used

for

SSB

VOX

or

CW

semi-break-in

Peration.

In

the

MAN

(manual)

position.

the

transceiver

is

keyed

by

either

the

standby

switch

or

the

microphone

PTT

switch

for

VOX

operation,

the

standy

switch

remains

in

RED. (See

page

12)

8

METER

SWITCH

During

transmission,

the

meter

switch

determines

meter

funétion,

The

switch

selects

between:

ALC

The

meter

monitors

the

output

of

the

final

Stage

power

amplifier

during

transmis.

sion,

During

SSB

operation,

adjust

the

MIC

control

so

that

the

meter

pointer

is

within

the

ALC

zone.

Similarly,

adjust

the

CAR

control

for

CW

operation.

IC

(TS-1208)...

The

meter

monitors

final

stage

collector

current,

RF

(TS-120V)...

In

this

position

the

meter

monitors

the

felative

RF

output

of

the transceiver

9.

FIX

(fixed

channel)

SWITCH

The

TS-120SIV)

has

a

built-in

fixed

channel

oscillator

(crystals

are

user-provided.

optional)

which

is

activated

by

the FIX

switch

for

fixed

channel

or

VEO

operation,

1)

SUBDIAL

The

subdial

is

calibrated

from

0

to

500.

It

is

driven

from

the

main

tuning

knob

to

indicate

the

tansceiver's

operating

frequency.

1)

MAIN

TUNING

KNOB

This

control

is

used

to

select

the

desired

operating

frequen-

cy.

The

scale

on

the

control

knob

is

calibrated

at

1

kHz

in-

tervals,

allowing

accurate

tuning.

For

exact

frequency,

reac

the

Digital

Display,

i?

RIT

INDICATOR

This

light

emitting

diode

indicates

the

RIT

circuit

is

ON.

i)

IF

SHIFT

CONTROL,

By

using

this

control.

the

IF

crystal

filter

center

frequency

can

be

shifted

+1

kHz.

allowing

adjustment

of

tone

quality,

oF

eliminating

interference

from

adjacent

frequencies

For

normal

operation.

this

control

should

be

set

to

the

center

(0"

position

(detent)

@

RIT

CONTROL

When

the RIT

circuit

is

ON,

this

will

vary

receive

frequency

by

about

41.5

kHz.

When

the

control

is

set

to

the

“0

enter

position.

there

is

no

frequency

shift.

1

CAR

(CARRIER

LEVEL)

CONTROL

This

control

is

used

to

adjust

the

carrier

output

level

only

during

CW

operation.

Adjust

the

control

so

the

ALC

meter

indication

is

within

the

ALC

zone

8

'*

MIC

(MICROPHONE

GAIN)

CONTROL

This

adjusts

mic

empli'=-

gain

during

SSB

operation,

Again

adjust

the

control

so

ths

ALC

meter

indication

is

within

the

ALC

zone,

»)

AF

GAIN

(AUDIO

GAIN)

CONTROL

This

control

adjusts

the

receiving

audio

amplifier

gain

Volume

of

the

receives

signal

increases

as

the

control

is

turned

clockwise,

&

RF

GAIN

CONTROL

This

adjusts

the

receiver

section's

RF

amplifier

gain.

Turn

the

knob

fully

clockwise

for

maximum

gain,

Turn

counterclockwise

to

reduce

the

gain

'§

BAND

SWITCH

The

9-position

switch

selects

all

the

amateur

bands

from

3.5

to

29.7

MHz

and

WWV.

Set

the

switch

to

the

desired

band,

%

POWER

SWITCH

This

switch

the

TS.120S(V)

ON

and

OFF

2)

NB

(NOISE

BLANKER)

SWITCH

This

switch

is

used

to

reduce

pulsating

ignition

noises

of

the

type

usually

emitted

from

motor

vehicles,

#

CAL

(CALIBRATOR)

SWITCH

This

switch

energizes

the

built-in

25

kHz

marker

circuit.

The

calibrator

turns

ON

at

the

in

position,

BRIT

SWITCH

This

push

switch

turns

the

RIT

(Receiver

Incremental

Tun-

ing)

circuit

ON

and

OFF.

With

the

switch

depressed,

the

cir-

Cuit

is

activated

and

the

RIT

indicator

is

illuminated,

allowing

the

receive

frequency

to

be

shifted

by

about

+1.5

kHz

in-

dependent

of

the

transmit

frequency

by

using

the

RIT

con-

fol.

The

RIT

circuit

is

turned

OFF

when

the

switch

is

out

®

VOX

GAIN

CONTROL

This

control

adjusts

VOX

circuit

sensitivity

for

both

SSB

and

CW

operation

®

DELAY

CONTROL

This

control

is

used

to

adjust

the

“Hold”

time

of

the

VOX

cir-

Suit,

Clockwise

adjustment

gives

longer

hold:

2%

ANTI-VOx

CONTROL

‘This

control

is

used

to

adjust

the

VOX

system

so

that

itis

not

tripped

by

sound

from

the

speaker.

ANT

CoNNectoR.

7

@)GND

TERMINAL

—

3

cw

KEY

Jack

-

COOLING

FAN

6)EXT

VFO

CONNECTOR

4)

SPEAKER

JACK

8

REFERENCE

FREQUENCY

ADJUSTMENT

ACCESS

'S)

REMOTE

CONNECTOR

OC

POWER

CONNECTOR

3.2

REAR

PANEL

D

ANT

(ANTENNA)

CONNECTOR

This

UHF

connector

should

be

attached

to

@

suitable

anten.

1a

for

transmitting

and

receiving.

The

antenna

cable

should

be

of

a

50-ohm

unbalanced

type.

terminated

in

a

PL:259

plug.

2)

GND

(GROUND)

TERMINAL

The

TS-120S(V)

should

be

grounded

through

this

terminal

to

avoid

the

possibility

of

TVI

and

BCI.

Use

9s

short.

and

heavy

a

lead

as

possible.

@

cw

key

Jack

For

CW

operation.

connect

your

key

to

this

terminal

using

a

two

conductor

phone

plug

and

shielded

cable

@

SPEAKER

(EXTERNAL

SPEAKER)

JACK

An

external

speaker

of

4

~

16

ohms

impedance

(such

as

the

SP-120)

can

be

connected

here.

This

will

disable

the

in-

ternal

speaker.

5)

REMOTE

CONNECTOR

This

is

used

1g

8

linear

amplifier

or

other

equipment.

For

connection.

refer

to

the

illustration

below.

fig.

3-3.

Always

use

shielded

line

for

all

functions,

7508

To

ALC

ercuit

Unswotened

AF

OUT

an

From

standby

switch

rT

Cacut

18-1208

INTERNAL

WIRING

Function

Pins

ALC

+6,

6ND

(—

10V

DC

max)

Relay

control

2nd

5

or

4

125V

DC

*

Bridge

2

to

GND

if

required

1Amax

EXT

PTT

3.GND

®

EXT

VFO

(EXTERNAL

VFO)

CONNECTOR

This

is

for

connection

of

an

external

VFO-120.

(Note:

the

VFO-520

and

VFO-820

cannot

be

used,

since

their

‘operating

frequency

is

incorrect)

D

DC

POWER

CONNECTOR

This

is

used

to

connect

the

DC

power

supply.

@

REFERENCE

FREQUENCY

ADJUSTMENT

For

PLL

reference

oscillator

adjustment.

Use

WWV

signal

for

calibration.

3)

COOLING

FAN

The

cooling

fan

operates

when

the

heat-sink

temperature

nea

SECTION

4.

OPERATION

Sextings

for

reception

AE

Tum

fly

Tore

fay

‘Settings

for

transmission

TAR

ond

|

SS

ona]

Fig.

4-1

Control

and

Switch

Settings

4,1

RECEPTION

First

connect

the

antenna,

microphone

and

key.

Then,

set

the

controls

and

switches

referring

to

Fig.

4-1.

For

SSB

operation

the

MODE

switch

should

be

set

to

comply

with

common

operating

practice:

that

is.

it

should

be

set

to

LSE

for

the

3.5

and

7

MHz

bands

and

to

USB

for

the

bands

above

14

MHz

Ascertain

that

the

TS-120S(V)

is

ready

for

operation,

then

turn,

the

POWER

switch

ON.

The

meter,

dial

scale

and

digital

display

will

lluminate.

indicating

the

transceiver

isin

operation.

The

transceiver

is

fully

solid-state,

allowing

reception

as

soon

as

the

POWER

switch

is

turned

ON.

‘Advance

the

AF

GAIN

contro!

clockwise

until

some

receiver

noise

is

heard

from

the

speaker.

Turn

the

main

tuning

knob

so

the

desired

signal

can

be

heard

clearly

While

turning

the

main

tuning

knob.

the

frequency

(MHz

digits)

reading

on

the

digital

display

wil

change

at

the

edge

of

each band

(for

example,

from

(28.999.9}

ro

{23.000.0)

MHz).

When

tuning

above

or

below

a

band

edge.

the

1

MHz

and

10

MHz

digits

are

blanked.

as

shown

below.

EN

RAO

REE

IN

TN

ELE

1

i

i

i

v v

4.1.2.

NB

SWITCH

The

TS-120S{V)

has

a

sophisticated

noise

blanker

designed

to

reduce

ignition-type

pulse

noise.

The

noise

blanker

is

pi

ticularly

important

for

mobile

operation.

When

necessary,

activate

the

noise-blanker

by

depressing

the

NB

switch

ON.

4.1.3.

RF

GAIN

CONTROL

(Fig.

4-2)

For

normal

operation,

this

control

should

be

turned

fully

clockwise

for

maximum

sensitivity.

Receive

sensitivity

is

reduced

by

turning

the

control

counterclockwise.

Adjust

the

RF

GAIN

so

the

S-meter

does

not

show

ex-

cessive

deflection.

This

minimizes

noise

during

reception

and

allows

the

S-meter

to

indicates

signal

peak

(or

a

little

below

that

point),

noise

is

markedly

reduced

when

the

signal

is

absent

‘Simeter

peak

pownt

AF

GAIN

-@>

RF

GAIN

)

(Coc

593955

139539950000)

4.1.1,

WWV

RECEPTION

To

receive

WWV

at

15

MHz,

set

the

BAND

switch

to

JJY/WWV

and

turn

the

main

tuning

knob

until

the

subdial

reads

"500".

The

digital

display

indicates

"000.0"

instead

of

15.0000.

10

Sma

eg

Pa

a:

ful

counter

thes

love

ate

>

clockwise

poston

rates

STR

CAIN

CoO

say

oe

can

po

Pie,

ys

Fig.

4-2

RF

GAIN

Control

Operation