Kenwood TH-225A Manuel utilisateur

144MHz

TRANSCEIVER

TH-225A

INSTRUCTION

MANUAL

KENWOOD

CORPORATION

©PRINTED

JAPAN

B50-8334-

oat

P)(T)

90/12

1110987654321

89/21

Thank

you

for

purchasing

this

new

transceiver.

IMPORTANT

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

service.

SAVE

THIS

INSTRUCTION

MANUAL.

Under

normal

circumstances,

the

transceiver

will

operate

accordance

with

these

operating

instructions.

The

tran-

sceiver

was

preset

the

factory

and

should

only

read-

justed

qualified

technician

with

proper

test

equipment.

Attempting

service

alignment

without

factory

authoriza-

tion

can

void

the

transceiver’s

warranty.

CAUTION:

—

Long

transmission

extended

operation

the

watt

mode

might

cause

the

rear

this

transceiver

get

warm.

not

place

the

transceiver

where

the

heat

sink

(rear

panel)

might

come

contact

with

plastic

vinyl

surfaces.

Use

external

antenna

for

fixed

station

recommended.

FCC

WARNING:

This

equipment

may

generate

use

radio

frequency

ener-

gy.

Changes

modifications

this

equipment

may

cause

harmful

interference

unless

the

modifications

are

express-

approved

the

instruction

manual.

The

user

could

lose

the

authority

operate

this

equipment

unauthorized

change

modification

made.

CONTENTS

ACCESSORIES

SPECIFICATIONS

BATTERY

PACK...

Ni-Cd

battery

Recharging

the

battery

pack

Manganese/Alkaline

batteries

Operating

time

CONTROLS

AND

FUNCTIONS

OPERATION

Receive

Transmit

Frequency

selection...2....:cccecseseseeisacse

esses

R&EPBator:

OPEFAtiON

:cceis<ssacdesencossecidcenedeoareaurses

Transmitter

offsets

Reverse

function

Tone

operation

Auto

patch

operations

...

MMQMOLY:

226

600sesace

sdveanimersavedeccuaisaiaasazapeRiiaseacton

Memory

channels

Memory

entry

Memory

recall

Odd

Split

memory

channel.

Memory

channel

lockout

............:eccceeeeeeeeeeee

Clearing

specific

memory

channel

Clearing

all

memories

Memory

back-up

battery

Priority

alert

channel

check

Batty

SOVGIS.

fi5i5

00005055

vend

savenveesanssyucds

onan

MAINTEMANGE

s:;..20c:00ccccensecessccsidavannsvenssdcenmenscsees

case

difficulty

Service

OPTIONAL

ACCESSORIEG.

.............0cccceeeseeeeenteeeeeeenee

“Programmable

tone

decoder

unit

TSU-4

BLOCK

DIAGRAM

another

sheet

SCHEMATIC

DIAGRAM

another

sheet

ACCESSORIES

Unpack

your

transceiver

carefully

and confirm

that

sup-

plied

with

the

following

accessories.

Antenna

for

144

MHz

Rubber

cap

Belt

Hook.........

Machine

Screw

Spring

washer

...N16-0030-41

Ni-Cd

Battery

pack

(BBP

aeeae~sh

oon

saises6

WO9-0541-05..........

Battery

charger

(120

V)..WO9-0517-05..

cable

(PG-2V)...

..-E30-2078-25

Instruction

Manual

.-B50-8334-XX

Warranty

Card.....

SPECIFICATIONS

FREQUENCY

RANGE

(MHz)

144.000

147.995

MODE

F3E

(FM)

OPERATING

TEMPERATURE

20°C

+50°C

ANTENNA

IMPEDANCE

5029

POWER

REQUIREMENT

BATTERY

PACK

6.3

V~15

VDC

(12

VDC

nominal)

7.2

V~16

VDC

(13.8

VDC

nominal)

TRANSMIT

MODE

(13.8

Less

than

1.9A

[Low

TRANSMIT

MODE

0.5

(13.8

Less

than

0.7

RECEIVE

MODE

WITH

SIGNAL

Approx.

BATTERY

SAVER

MODE

(At

Approx.

DIMENSIONS

WxHxD

67x

190

(mm)

(PROJECTIONS

INCLUDED)

70x

198

(mm)

WEIGHT

With

Ni-Cd

battery

and

antenna

Approx.

600

OUTPUT

POWER

13.8

VDC

With

PB-1,

with

PB-12

With PB-2

2.5

With

PB-3,

PB-4

1.5

Low

0.5

MODULATION

REACTANCE

MAXIMUM

FREQUENCY

DEVIATION

kHz

SPURIOUS

RADIATION

Less

than

—60

CIRCUITRY

DOUBLE

CONVERSION

SUPERHETERODYNE

INTERMEDIATE

FREQUENCY

1st

16.3

MHz

2nd

455

kHz

|_SENSITIVITY

SINAD

Less

than

0.2

SQUELCH

SENSITIVITY

Less

than

0.1

SELECTIVITY

-—6

than

kHz

—40

Less

than

kHz

AUDIO

OUTPUT

POWER

(across

load

10%

distortion)

than

500

NOTE:

Circuit

and

ratings

are

subject

change

without

notice,

due

development

technology.

BATTERY

PACK

Installing

the

battery

pack

Match

the

concave

part

the

bottom

the

radio

the

convex

part

the

top

the

battery

pack.

Turn

the

battery

pack

clock-

wise

until

clicks.

sure

the

pack

and

trans-

ceiver

are

locked

together.

Removing

Battery

pack

Pressing

the

battery

release

button,

turn

the

battery

pack

counterclockwise.

Ni-Cd

BATTERY

PACK

(PB-12)

NOTE:

This

battery

pack

has

not

been

charged

the

factory

order

provide

you

with

the

greatest

number

charge/discharge

cycles.

You

must

charge

the

battery

before

use.

The

battery

pack

will

re-

quire

several

charge/discharge

cycles

before

you

can

expect

see

the

maximum

operating

period

between

charges.

the

battery

will

stored

for

greater

than

months

should

recharged

before

use.

RECHARGING

THE

BATTERY

PACK

Insert

the

charge

plug

from

the

supplied

Battery

Charger

into

the

receptacle

the

rear

the

battery

pack.

Then

plug

the

Charger

into

the

line.

The

LED

the

Charger

will

illuminate

show

that

the

pack

charging.

The LED

will

remain

long

the

Charger

connected

the

power

source

and

the

battery,

indicating

that

the

pack

still

being

charged.

not

allow

the

battery

charge

for

greater

than

hours.

The

useful

life

and

battery

performance

will

reduced

you

exceed

the

recommended

charge

period.

NOTES:

Turn

off

the

power

switch

before

charging.

Recharging

should

done

within

ambient

temperature

bet-

ween

10°C

40°C

(50°F

104°F).

Recharging

performed

out

this

range

may

not

fully

charge

the

battery.

MANGANESE

ALKALINE

BATTERIES

Load

(AA)

manganese

alkaline

batteries

series

the

sup-

Stopper

plied

battery

case.

(Be

sure

ob-

serve

the

polarities.)

(We

recommend

use

high-

perfomance

manganese

batteries.)

Battery

pack

(1)

can

inserted

in-

the

case

(2)

only

specific

direction.

Check

the

shape

(top

and

bottom)

after

moving

the

stopper

the

rear

side,

then

insert

the

battery

correctly.

Inserting

the

battery

Battery

pack

(1)

force

without

checking

the

shape

may

damage

the

case.

OPERATING

TIME

Batt

voltage

Transmitting.

Receiving

Ag AF

OUTPUT

“Battery

voltage

measured

transmis-

sion

(Hi).

Case

(2)

Ni-Cd

battery

L2ZV

500mAn\

~12V

B00mAh

(PB-1)

(PB-12)

(Manganese

battery

Low

Power)

battery

8.4y

Ni-Cd

battery

7.2V

1600mAh

(PB-4)

Ni-Cd

battery

7.2V

|800mAh

1(PB-3)

Seu

are

fan,

PU=NGE9

batiary

Lower

imit

voltage

range

for

transmission

720°"

240.

270

(minutes)

Manganese

battery

(except

Alkaline

manganese

battery)

suitable

only

for

LOW

power

transmission.

Recharge

the

Ni-Cd

battery

pack

when

the

BATT

indicator

comes

on.

recommend

use

the

PB-3

PB-4

Ni-Cd

battery

pack

for

long

transmission

extended

operation.

CONTROLS

AND

FUNCTIONS

Antenna

connector

This

jack

used

connect

the

supplied

antenna.

Twist

lock

with

the

BNC

connector.

terminal

This

terminal

used

for

external

power

supply.

Input

voltage

13.8

VDC

nominal.

The

center

the

(+)

side

and

the

sleeve

(—)

side.

You

should

turn

the

power

switch

OFF

when

connecting

this

terminal.

Pay

attention

the

polarity.

@~)-O

CAUTION:

—————_________

precaution,

not

remove

the

bat-

tery

pack

when

external

power

sup-

ply

used.

Use

the

KENWOOD

PG-2V

PG-3E

optional

cable

for

the

con-

Teo)

nection.

9.5

MIC

jack

This

jack

used

for

connection

external

microphone.

The

use

electret

type

microphone

recommended.

Input

impedance

and

the

voltage

this

terminal

4V.

jack

This

jack

used

for

earphone

external

speaker.

The

recommended

impedance

nominal.

TONE

switch

This

switch

used

activate

the

sub-audible

tone

encoder.

HI(#

)/LOW

(

)switch

This

switch

used

select

the

transmit

output

power.

SQL

control

The

SQL

control

used

eliminate

noise

during

signal

periods.

Normally,

this

control

adjusted

clockwise

until

the

noise

just

disappears

and

the

BUSY

indicator

goes

OFF

(Threshold

level).

For

scan

operation,

this

control

must

set

the

threshold

point.

When

incoming

signal

weak

unstable,

readjust

the

squelch

for

optimum

reception.

For

tone

squelch

operation

with

TSU-4,

this

control

must

set

the

T.SQ

position.

VOL

control

Volume

control

with

power

ON/OFF

switch.

MONITOR

switch

Pressing

this

key

will

open

squelch.

PTT

(Push

Talk)

switch

For

transmission,

press

this

switch

and

speak

into

the

microphone.

RELEASE

button

Used

release

the

battery.

Depress

this

button,

and

turn

the

battery

counterclockwise.

LAMP

key

This

key

controls

the

lamp

the

LCD

display.

NOTE:

When

the

LAMP

battery

drain

will

accelerated.

not

use

this

feature

unnecessarily.

@®

OFFSET/F

key

The

OFFSET/F

key

used

select

the

desired

transmitter

offset

for

repeater

operation.

Each

time

the

key

pressed,

the

mode

cycles

from

shift,

—

shift,

simplex,

and

back

shift.

When

the

offset

function

ON,

the

sym-

bol

‘’+’

‘‘—"'

displayed.

Pressing

the

[E_]

and

the

OFFSET/F

key

order

used

change

the

desired

offset

frequency.

R/TONE.

key

This

key

used

reverse

the

transmit/receive

frequencies

during

repeater

operation.

TONE.

TONE

FREQUENCY

key

Pressing

the

[_]

and

the

R/TONE.

key

order

used

change

the

frequency

the

tone

encoder.

()

SAVE

key

The

SAVE

key

used

select

the

power

save

condition

during

the

receive

mode.

Pressing

the

[L_]

and

the

SAVE

key

order

used

change

the

battery

saver

on/off

ratio.

SPEAKER

MICROPHONE

BATTERY

CASE

Display

GOB

BAND

SEEK

FREQUENCY

display

|[PRIO}

(uTo)

Save

Displays

the

operating

frequency.

when

the

Priority

Alert

function

active.

Flashes

when

the

channel

busy.

Displays

the

selected

power

save

con-

dition;

(AUTO/,

SAVE]

for

auto

save

mode,

SAVE]

for

save

mode,

and

indicator

for

OFF.

whenever

the

squelch

opens

dur-

ing

receive.

all

the

time

the

squelch

control

rotated

counterclockwise,

and

the

T.SQ

off.

during

transmit

mode.

@-+

|MEMO|

PROG

SEEK!

TIME|

CAR

(Oe

Key

Lock]

Used

indicate

the

relative

receive

signal

strength,

indication

transmitting.

Indicates

the

selected

frequency

step.

Indicates

the

selected

memory

channel

number.

Indicates

for

approx.

seconds

after

pressing

the

[E_]

key.

Displays

the

selected

offset,

minus

plus,

and

indicator

for

simplex.

whenever

the

REVERSE

function

active.

Indicates

for

approx.

seconds

after

pressing

the

[4]

key.

Indicates

the

selected

scan

mode.

Indicates

the

selected

scan

stop

mode.

Flashes

during

scan.

Indicates

that

the

transmitter

has

been

disabled

the

TX.STOP

key.

Indicates

that

all

keyboard

functions

except

LAMP

key

has

been

disabled

the

KEY

LOCK

activated.

when

the

battery

voltage

falls

be-

low

the

level

for

good

communications.

Recharge/replace

the

battery

pack.

DOUBLE

ROLE

KEYS

PRIORITY

BEEP.

STEP

all

LCA

BAND

MEMORY

PROGRAM

ce)

CARRIER

These

keys

except

the

E])

and

keys,

have

two

functions.

The

1st

function

printed

the

key.

The

2nd

function

printed

above

the

key.

All

these

2nd

functions

are

active

for

approx.

seconds

af-

ter

pressing

the

key.

Numeric

keys:

~-E,f

These

keys

are

used

select

the

desired

operating

fre-

quency

and/or

memory

channel

number.

Memory

channel

and

also

serve

additional

functions

discribed

below.

channel

used

store

the

Priority

Alert

channel

in-

formation.

channel

used

store

the

lower,

and

channel

the

upper

limit

frequency

for

the

programmable

band

scan.

UP/DOWN

keys:

These

keys

are

used

increase

decrease

the

operating

frequency,

offset

frequency,

tone

frequency,

the

power

saver

circuit

rate.

Function

exchange

key

The

[]

key

used

activate

the

2nd

function.

The

indicator

displayed

for

approx.

seconds

after

pressing

the

key.

CAUTION:

You

must

press

the

2nd

function

while

the

indicator

lit,

the

radio

will

perform

the

function

printed

the

key,

rather

than

the

function

printed

above

it.

Memory

key

The

[4]

key

used

select

the

desired

memory

channel.

The

operation

similar

that

the

key,

that,

the

indicator

will

illuminate

for

seconds

the

LCD

display.

CAUTION:

The

memory

channel

must

selected

within

seconds

press-

ing

the

key.

ENTER

key

The

key

used

enter

frequency

selected

the

numeric

keys.

SCAN

key

The

key

used

start

stop

the

scan

function.

PRIORITY

CHANNEL

CHECK

key:

[-_]

then

1/PRIO

These

keys

are

used

monitor

whether

the

priority

chan-

nel

(CH

busy

not.

When

this

function

activated,

the

radio

will

switch

approximately

once

every

seconds.

cancel

this

function,

press

these

keys

again.

BEEP

key:

then

2/BEEP

Each

time

these

keys

are

pressed,

the

audio

annunciator

will

turned

OFF

alternately.

(FREQUENCY)

STEP

key:

then

3/STEP

Each

time

these

keys

are

pressed,

the

frequency

scanning

step

size

will

increased

kHz.

Several

different

scan

function

keys

and

scan

stop

keys

are

provided.

BAND

SCAN

key:

[-_]

then

4/BAND

MEMORY

SCAN

key:

then

5/MEMORY

PROGRAMMABLE

BAND

SCAN

key:

[Z]

then

6/PROGRAM

SEEK

OPERATED

SCAN

key:

[-_]

then

7/SEEK

TIME

OPERATED

SCAN

key:

[_]

then

8/TIME

CARRIER

OPERATED

SCAN

key:[-_]

then

9/CARRIER

For

additional

information

this

function

refer

page

14.

©@

TX.

STOP

key:

then

M/TX.

STOP

Pressing

these

keys

will

prevent

accidental

transmission.

cancell

this

function,

press

these

keys

again.

KEY

LOCK

key:

[E]

then

ENTER/KEY

LOCK

Depress

these

keys

and

the

frequency

and

other

settings

will

remain

unchanged

keyboard

operation

except

the

LAMP

key.

cancel

this

function,

press

these

keys

again.

FAST

[7]

key:

then

V/FAST

FAST

[{]

key:

then

A/FAST

LOCK

OUT

key:

then

0/L.OUT

Each

time

these

keys

are

pressed,

the

Memory

channel

lock

out

function

will

turned

OFF.

OPERATION

RECEIVE

After

power

and

antenna

connections

have

been

completed,

set

the

switches

follows:

Turn

the

VOL

control

clockwise

turn

power.

The

frequency

the

LCD

display

will

show

the

transceiver

operating.

the

VOL

control

turned

clockwise,

either

back-

ground

noise

QSO

will

heard.

eliminate

the

no-signal

noise

turn

the

SQL

control

clockwise.

Enter

the

desired

frequency.

TRANSMIT

Precaution:

Check

the

intended

transmit

frequency

before

operating

prevent

interference

with

other

stations.

you

are

using

(Tone

Squelch)

press

the

MONITOR

key

allow

the

Squelch

open.

Simply

depress

the

PTT

switch

and

the

indicator

will

light.

Speak

into

the

microphone.

Recommended

distance

the

microphone

approximately

inches

cm).

CAUTION:

Long

transmission

extended

operation

the

watt

mode

might

cause

the

rear

this

transceiver

get

warm.

not

place

the

transceiver

where

the

heat

sink

(rear

panel)

might

come

contact

with

plastic

vinyl

surfaces.

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