Kenwood TM-241A User manual

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GOOMNA»

144MHz

FM

TRANSCEIVER

TM-241A/241E

430/440MHz

FM

TRANSCEIVER

TM-441A/441E

1200MHz

FM

TRANSCEIVER

TM-541A/541E

INSTRUCTION

MANUAL

KENWOOD

CORPORATION

62-0031-00(T)

Thank

you

for

purchasing

this

new

transceiver.

IMPORTANT:

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

in

service.

SAVE

THIS

INSTRUCTION

MANUAL.

CAUTION:

NOTE:

If

disregarded,

inconvenience

only,

no

risk

of

equipment

damage

or

personal

injury.

CAUTION:

Long

transmission

or

extended

operation

in

the

HI

power

mode

might

cause

the

rear

of

this

transceiver

to

get

warm.

Do

not

place

the

transceiver

where

the

heat

sink

(rear

panel)

might

come

in

contact

with

plastic

or

vinyl

surfaces.

Equipment

damage

may

occur,

but

not

personal

injury.

This

instruction

Manual

covers

the

following

models.

TM-241A:

144MHz

FM

TRANSCEIVER

(U.S.A.

and

general

markets)

TM-241E:

144MHz

FM

TRANSCEIVER

(U.K.

and

European

markets)

TM-441A:

440MHz

FM

TRANSCEIVER

(U.S.A.

only)

TM-441A:

430MHz

FM

TRANSCEIVER

(General

markets)

TM-441E:

430MHz

FM

TRANSCEIVER

(U.K.

and

European

markets)

TM-541A:

1200MHz

FM

TRANSCEIVER

(U.S.A.

only)

TM-541E:

1200MHz

FM

TRANSCEIVER

(European

markets)

FCC

WARNING

This

equipment

generates

or

uses

radio

frequency

energy.

Changes

or

modifications

to

this

equipment

may

cause

harmful

interference

unless

the

modifications

are

expressly

approved

in_

the

instruction

manual.

The

user

could

lose

the

authority

to

operate

this

equipment

if

an

unauthorized

change

or

modification

is

made.

CONTENTS

Ls

Ch

PON

BEFORE:OPERATION

|

s..2c00

e064

820

ees

4

SPECIFIGATIONS

22tecicae

spacers

>

6

ACCESSORIES

(20a)

tien

3

7

INSTALLATION

INSTRUCTIONS

......

¥

OPERATION

CONTROL

FUNCTIONS.

2

......00000

a0.

10

RECEIVER

OPERATION

Reception!

©

....2.

lot

eer

aT

JEON

16

Frequency

Selection

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

17

Frequency

Step

Selection

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

17

Programmable

VFO

Tuning

Limits

......

18

ALT(TM-541A/E

only)...........-.-0-.-

19

TRANSMITTER

OPERATION.............-

20

Time-out

Timer'CFOT))

cc

oceccen

esses

20

MEMORY

Microprocessor

Memory

back-up

.......

21

[ittialiState

oon.

cee

pis

os

So

asa

Oars

21

Microprocessor

Initialization

...........

21,

Memory'Channél)

22:8. .60..

62.

c.eeces-

21

Memory

Contents

2...

2.0

e..s.e3

bbe.

ees

22

Memory

Entfy)

).

.2:0:

.-

cee

sates

S38.

oes

22

Memory

Channel

Recall

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

24

Memory

SINE

ya.

cna

sic

eae

bees

kee

24

SCAN

ScaniOperation

«is

cscu

cewsiesuwun

aes

25

6.

Hold/Resume

Programming

...........

25

Band

Scatin’

3o3.

2s

Scdenes

seems

snares

26

Programmable

Band

Scan

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

26

Memory

ChannelScan

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

27

Memory

Channel Lockout

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

27

Priority

Alert

Function

.........60.

e000

28

REPEATER

OPERATIONS

Transmitter

Offsets

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

28

Reverse

Function

29

Tone

Operation

29

Tone

Frequency

Selection

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

29

Autopatch

(U.S.A.

version

only)

........

30

TONE

/

CTCSS

OPERATION..........

30

DTSS

(Dual

Tone

Squelch

System)

OPERATION

esnadeiccn

arsine

et

annie:

31

DRS

(Digital

Recording

System)

OPERATION.

fin.

ate

ce

see

es

bah

ges

ak

34

PAGING

Xi.

5.

hun.

etter

pase

nes

41

TONE

AEERT,

SYSTEM...

dcccccew

ess.

47

APO

(Automatic

Power

Off)

...

48

DIM@Diramer):

ee

sc

uss

3

se

asx

05.2

208

<

48

BEEP

IMs

$09

[er

mos

49

LOCK/MILOCK!

Men

a5

a

BAA

49

BLOCK

DIAGRAM

and

SCHEMATIC

DIAGRAM

Another

sheet

A

WARNING)

BEFORE

OPERATION

TO

PREVENT

ELECTRIC

SHOCK,

FIRE

AND

OTHER

INJURY.

PLEASE

NOTE

THE

FOLLOWINGS:

To

avoid

risk

of

electric

shock,under

no

circumstances

should

the

unit

be

opened.

Do

not

place

this

unit,where

it

will

be

exposed

to

direct

sunlight

or

close

to

heating

appliances.

To

ensure

good

ventilation,

do

not

put

anything

on

top

of

the

cabinet

and

allow

at

least

15

cm

(6

inches)

of

space

behind

the

unit.

The

power

requirement

is

13.8

VDC.

Never

attempt

connection

to

a

24

VDC

source.

Do

not

place

the

unit

in

areas

off

excessive

dust,

high

humidity

or

on

unstable

surfaces.

Do

not

drop

pieces

of

metal,

needles,

coins

and

other

electrically

conductive

materials

into

the

unit.

Do

not

touch

the

power

plug,

when

your

hands

are

wet.

Do

not

pull

the

power

cord,

when

disconnecting

it

from

the

AC

wall

outlet.

Grasp

the

plug

and

ensure

that

your

fingers

do

not

touch

the

live

pins.

If

an

abnormal

odor

or

smoke

is

detected,

immediately

turn

the

power

off

and

pull

out

the

power

plug.

Contact

the

KENWOOD

service

station

or

our

dealer.

CLEANING

Ee

(a8

Turn

the

power

off,

before

cleaning

the

unit.

Do

not

use

any

type

of

abrasive

pad,

thinner,

benzine

or

any

substances

which

may

damage

the

unit.

Wipe

the

front

panel

and

other

exterior

surfaces

of

the

unit

with

a

soft

dry

cloth

or

a

soft

cloth

lightly

moistened

with

water.

2

SPECIFICATIONS

TM-241A(USA)

|

TM-241A/E

|TM-441A(US.A)|

TM-441A

TM441E

TM541A/E

Frequency

range

MHz

144

to

148

|

144

to

146|

438

to

450

430

to

440

|

430

to

440

|

1240

to

1300

Mode

F3E(FM)

Antenna

impedance

500

Operating

temperature

—20°C

to

+60

(—4F

to

+1407)

‘s

|

Power

requirements

13.8V

DC

+15%(117~158V)

S

Ground

Negative

S

Cc

t

drai

Transmit

mode

Less

than

11A

Less

than

10A

Less than

6A

urrent

drain

:

Receiver

mode

Less

than

0.6A

Frequency

stability

Less

than

+10

ppm

Less

than

3ppm

Dimensions

(WXHXD)

(mm)

(Projections

included)

14040

x

160(5-1/2”

X1-37/64"X6-19/64")

(140

X40

X172(5-1/2"X

1-37/64"X6-25/32”)

Weight

(kg)

1.2(2.65lbs)

HI

50wW

35W

10W

Output

power

*

MID

Approx

10W

Approx

10W

i

5

LOW

Approx.

5W

Approx.

5W

1w

_

Modulation

Reactance

modulation

2

|

Spurious

radiation

Less

than

—

60

dB

£

Maximum

frequency

deviation

E5KHz

Audio

distortion

(at

60%

modulation)

Less

than

3%

(300

to

3000

Hz)

Microphone

impedance

6000,

Circuity

Double

conversion

superheterodyne

Intermediate

frequency

1st/2nd

10.7MHz

/

455kHz

30.825MHz

/

455kHz

_59.7MHz/455kHz

S

Sensitivity

(12

dB

SINAD)

Less than 0.16

«V

'S

|

Selectivity

—6dB:

More

than

12

kHz

—60dB_

Less

than

24

kHz

ce

|

Squelch

sensitivity

Less than

0.1

nV

Less

than

0.177

nV

Less than

0.1

uV

Output

(5%

distortion)

More

than

2

W

across

8

Q,

loads

External

speaker

impedance

80

otes

:

1.Circuit

and

ratings

are

subject

to

change

without

notice

due

to

advancement

in

technology.

2.*

Recommended

duty

cycle

:1

minute:

Transmit,3

minutes

Reception

3

ACCESSORIES

4

INSTALLATION

INSTRUCTIONS

Unpack

your

new

transceiver

carefully,

and

examine

it

for

visible.

pes

If

ets

pra

ie

has

been

4-1

INSTALLATION

damaged

in

shipment,

notify

the

transportation

7

company

immediately.

Save

the

boxes

and

packing

Mounting

Bracket

material

for

future

shipping.

When

installing

the

transceiver

in

a

vehicle

consider

the

The

following

accessories

should

be

included

in

the

box

ease

of

operation

and

safety

when

selecting

the

with

the

transceiver.

location

for

the

mounting

bracket.

DTMF

Microphone

1.

Install

the

bracket

using

the

supplied

flat

washers

(U.S.A.

CANADA

only)

.........

T91-0380-X5

1

ea.

and

self

tapping

screws

(

4

pcs.each).

or

E "

2.

Attach

the

transceiver

loosely

using

the

4

SEMS

Dynamic

Microphone

screws.

ENE

market

only)

......-

T91-0379-X5

1

ea.

3.

Align

the

grooves

in

the

bracket

with

the

a

Microphone

transceiver’s

screws

(

Fig.

A)

and

slide

the

transceiver

(EUROPE

market

only)

........

T91-0382-X5

1

ea.

totherear,

:

Microphone

Hook

4.

Adjust

the

viewing

angle

in

the

bracket

to

the

(U.S.A.

CANADA

only)

........

J20-0319-24

1

ea.

desired

position

(

Fig.

B).

;

Mobile

Mounting

Kit

5.

Hold

the

transceiver

in

place

and

tighten

the

4

SEMS

BYACKEES

51.

~

ave.

oterare

nia

sieve

J29-0436-03

1

ea.

screws

using

the

supplied

wrench.

SCROW'SOE

coca.

morele

e

onstese

N99-0331-05

1

ea.

Self

tapping

Screw

(U.S.A.

CANADA

only)

...

N46-3010-46

2

ea.

Hexwrench:

...26c00sece08ce0s

W01-0414-041

ea.

Stacking

plate

(TM-441A/441E/541A/541E)..

J21-4147-14

2

ea.

DC

power

Cable

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

E30-2111-05

1

ea.

Fuse

(TM-241A/241E:

15A)..

FO5-1531-05

1

ea.

(TM-441A/441E:

10A)..

FO5-1031-05

1

ea.

(TM-541A/541E:

8A)...

FO5-8021-05

1

ea.

Instruction

Manual

...........

B62-0031-XX

1

copy

Weartany

(Cad...

ais

2

sii

ves

won

oxen

sce

1

ea.

(U.S.A.,

CANADA

,

EUROPE

market

s

only)

4-2

CONNECTION

4-2-1

Mobile

Installations

Cautions

:

Make

sure

the

positive

(+)

and

negative

(—)

lead

polarity

is

correct

1.

Before

installing

the

power

cable,

be

sure

to

wvizen

iconnecdngiiesthicibatteny

remove

the

negative

lead

from

the

battery

for

Pete

Gore

er

Passengeneoinnartnent

safety.

To

the

2.

After

installation

and

wiring,

be

sure

to

double

transceiver

check

for

correct

installation

before

reconnecting

the

negative

lead

to

the

battery

terminal.

Moke

sure

acti

one

3.

If

the

fuse

opens,

be

sure

to

check

that

each

Battery

‘

"when

sian

of

ie

hele

by

ua

Chassis

or

conductor

has

not

been

damaged

by

short

>

fire

wall

circuiting,

etc.

Then

replace

with

a

new

fuse

of

If

the

wiring

hole

in

the

fire

wall

or

chassis

is

too

small,

disas-

the

same

rating.

semble

the

fuse

holder

to

thread

the

wire

through

the

hole.

4.

After

completing

the

wiring,

wrap

the

fuse

holder

From

passenger

with

heat

resistant

tape

to

protect

against

heat

oe

and

moisture.

Thread

like

this

.

Do

not

remove

the

fuse

even

if

the

power

cable

is

too

long.

ao

A.

Battery

Connections

Connect

the

power

cable

directly

to

the

battery

B.

Ignition

Noise

terminals.

Using

of

the

cigarette

lighter

socket

will

lead

: ; .

Late

3

to

a

poor

connection,

and

will

result

in

poor

This

transceiver

has

been

designed

to

suppress

ignition

performance.

Pay

close

attention

to

the

polarity

of

the

"0ise;

however,

if

excessive

noise

is

present,

it

may

be

cables

when

connecting

them

to

the

battery.

necessary

to

use

suppressor

spark

plugs

(with

resistors).

4-2-2 Fixed

Station

A

regulated

DC

power

supply

(13.8

VDC

capable

of

supplying

at

least

11

Amperes)

is

required.

The

PS-430

or

the

PS-50

are

recommended.

1.

Never

connect

the

AC

power

cable

to

the

AC

outlet

until

all

other

connections

have

been

made.

.

Before

connecting

and

disconnecting

the

power

connector,

be

sure

to

turn

OFF

the

POWER

switches

of

both

the

transceiver

and

the

DC

power

supply.

3.

Observe

polarity

of

the

DC

power

cable.

The

transceiver

operates

on

13.8

VDC,

negative

ground.

Battery

polarity

must

be

correct.

The

power

cable

is

color

coded:

Red

—

+

(Positive

polarity)

Black

—

—

(Negative

polarity)

nN

4-2-3

Antenna

The

type

of

antenna

that

is

used

will

greatly

affect

the

performance

of

the

transceiver.

Use

a

properly

adjusted

antenna,

of

good

quality,

to

enable

your

transceiver

to

perform

at

its

best.

The

antenna

input

impedance

is

50

ohms.

Use

50-ohm

coaxial

cable

such

as

RG-8U

or

8D-2V

for

this

connection.

If

the

antenna

is

far

from

the

transceiver

the

use

of

low

loss

coaxial

cable,

such

as

RG-

8U

is

recommended.

Match

the

impedance

of

the

coaxial

cable

and

that

of

the

antenna

so

that

the

SWR

is

less

than

1.5

to

1.

The

protection

circuit

in

the

transceiver

will

activate

if

the

SWR

is

particularly

poor

(greater

than

3

to

1).

High

SWR

values

will

cause

the

transmitter

output

to

drop,

and

may

lead

to

TVI

or

BCI

reports.

Caution

:

We

recommend

that

you

install

a

high

quality

lightening

arrestor

in

your

antenna

lines

for

protection

against

fire,electric

shock,personal

injury,or

damage

to

the

radio

itself.

5

OPERATION

5-1-1

CONTROL

FUNCTIONS

-

-

REV

=

miesBBBBs

a0

ae

AL

cToss

@

POWER

switch

Press

to

turn

the

transceiver

on

or

off.

Press

the

VFO/MPV

or

MR/M

key

and

switching

the

power

on

will

reset

the

VFO

or

MEMORY.

The

microphone

PF

key

can

be

programmed

when

the

power

is

switched

on.

@Tuning

control

This

control

is

used

to

select

the

desired

transmitter

/receiver

frequency,

MHz

step,

memory

channel,

frequency

step,

tone

frequency,

scan

direction,

etc.

@VOL

control

This

control

is

used

to

adjust

the

volume

from

the

internal

and

external

speaker

(if

used).

Clockwise

rotation

will

increase

the

volume

and

counterclockwise

rotation

will

decrease

the

volume.

@®SQL

(Squelch)

control

This

control

is

used

to

select

the

desired

squelch

threshold

level.

©LOW/DIM

key

LOW

This

function

is

used

to

select

the

transmit

output

power

level

(HI,

MID(Except

TM-541A/E),

or

LOW).

DIM

This

function

is

used

to

select

the

intensity

of

the

front

panel

display

illumination.

(See

page

48)

Pressing

the

F

key

for

longer

than

1

second

and

then

press

the

LOW/DIM

key

while

the

F

indicator

is

flash-

ing

will

turn

the

time-out

timer

function

on

and

off.

©

Microphone

connector

Attach

the

supplied

microphone

to

this

connector.

The

pin

out

of

the

connector

is

shown

in

the

accompanying

illustration.

@GND

@

GND

(Microphone

audio)

D

MIC

(Microphone

Audio).

ery

®

RX

Audio

Output

@

pir

(Approx

100

mV/10

k

ohm)

(Push

to

Talk)

@

DWN

@

up

@®

8

VDC

(Max

150

mA)