Kenwood Tm-241a User manual

COO/AN3»

144MHz

FM

TRANSCEIVER

TM-241A/241E

430/440MHz

FM

TRANSCEIVER

TM-441A/441E

1200MHz

FM

TRANSCEIVER

TM-S41A/S41E

(

INSTRUCTION

MANUAL

KENWOOD

CORPORATION

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:

Long

transmission

or

extended

operation

in

the

|

ІНІ

power

mode

might

cause

the

rear

of

this

|

i

transceiver

to

get

warm.

Do

not

place

the

transceiver

where

the

heat

sink

(rear

panel)

might

come

in

contact

with

plastic

ог

vinyl

surfaces.

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)

ТМ-441А:

440MHz

FM

TRANSCEIVER

(U.S.A.

only)

TM-441A:

430MHz

FM

TRANSCEIVER

(General

markets)

ТМ-441Е:

430MHz

FM

TRANSCEIVER

(U.K.

and

European

markets)

ТМ-541А:

1200MHz

FM

TRANSCEIVER

(U.S.A.

only)

TM-541E:

1200MHz

FM

TRANSCEIVER

(European

markets)

NOTE:

lf

disregarded,

inconvenience

only,

no

risk

of

equipment

damage

or

personal

injury.

CAUTION:

Equipment

damage

may

occur,

but

not

personal

injury.

FCC

WARNING

This

equipment

generates

or

uses

radio

frequency

energy.

Changes

or

modifications

to

this

equipment

may

cause

harmful

interference

unless

the

expressly

approved

іп

the

modifications

—

are

instruction

manual.

The

user

could

lose

the

authority

to

operate

this

equipment

if

an

unauthorized

change

or

modification

is

made.

CONTENTS

1.

gr

de

а.

BEFORE

OPERATION

.........

sac

ts

ње

4

SPECIFICATIONS

уснаа

NE

RS

6

ACCESSORIES

аа

istbeses

7

INSTALLATION

INSTRUCTIONS

......

7

OPERATION

CONTROL

ЕЏМСТОК5..................

10

RECEIVER

OPERATION

Reception

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

———

16

Frequency

Selection

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

17

Frequency

Step

Selection

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

17

Programmable

VFO

Tuning

Limits

......

18

АіТ(ТМ-541А/Е

опіу)..................

19

TRANSMITTER

OPERATION

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

20

Time-out

Timer

(TOT)

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

20

MEMORY

Microprocessor

Memory

back-up

.......

21

Initial

State

acc.

аз

VR

En

ES

qa

utat

ud

21

Microprocessor

Initialization

...........

21

Memory

Channel

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

21

Memory

Contents

«coss

EXER

22

Memory

Entry:

соқалар

eei

di

ovs

22

Memory

Channel

Recall

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

24

Memory

Sit:

о

ou

за

ier

E

s

24

SCAN

Scan

Operation

сеанса

ues

а

Sa

25

6.

7.

Hold/Resume

Programming

...........

25

Band

Scam.

oos

terza

daten

Е

ло

26

Programmable

Band

Scan

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

26

Memory

Channel

Scan

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

27

Memory

Channel

Lockout

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

27

Priority

Alert

Function

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

28

REPEATER

OPERATIONS

Transmitter

Offsets

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

28

Reverse

Function

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

29

Ттопе:Ореѓапоп:.

“асьохтаедфь

жееытжа

29

Tone

Frequency

Selection

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

29

Autopatch

(U.S.A.

version

only)

........

30

TONE

/

CTCSS

OPERATION..........

30

DTSS

(Dual

Tone

Squelch

System)

OPERATION

зена

RR

31

DRS

(Digital

Recording

System)

OPERATION:

„о

RE

RR

des

34

PAGING):

аон

оо

ован

EV

41

TONE

ALERT

SYSTEM

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

47

APO

(Automatic

Power

Off)

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

48

DIMCUimmab).

оа

ба

xe

eet

cater

danse

48

ВЕЕР

essai



49

LOCK/A.LOOK

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

49

BLOCK

DIAGRAM

and

SCHEMATIC

DIAGRAM

Another

sheet

MAINTENANCE

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

50

IN

CASE

OF

DIFFICULTY

...........

51

8.

OPTIONAL

ACCESSORIES

...........

52

A

WARRING);

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

ри!

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

1.

Turn

the

power

off,

before

cleaning

the

unit.

2.

Do

not

use

any

type

of

abrasive

pad,

thinner,

benzine

or

any

substances

which

may

damage

the

unit.

3.

Wipe

the

front

panel

and

other

exterior

surfaces

of

the

unit

with

a

soft

dry

cloth

or

a

soft

cloth

lightly

moistened

with

water.

Output

(5%

distortion)

2

SPECIFICATIONS

ТМ-241А/Е

|

TM-441Ausaicanaca

ТМ-441Е

|

Frequency

range

MHz

430

to

440

|

1240

to

1300

мовам

|

Antenna

impedance

са

аашаа

E

Operating

temperature

©

|

Power

requirements

-

Ground

Negative

.

gramen

Less

than

ТОА

Less

than

0.6A

Frequency

stability

Less

than

+10ppm

Dimensions

(WXH

XD)

(mm)

(Projections

included)

140

x40

X

160(5-1/2"

х1-37/64”х6-19/64”)

(140X40X172(51/2"x

1-37/64"

X

6-25/32")

Weight

(kg)

Hl

50W

Output

power

2

MID

Approx

OW

—

|

aoiw

CdS

5

LOW

Approx.

5W

E

с

Spurious

radiation

Less

than

—

60

dB

Е

Audio

distortion

(at

60%

modulation)

Less

than

3%

(300

to

3000

Hz)

Intermediate

frequency

lst/2nd

|

30.825MHz/455kHz

@

|

Selectivity

—6dB:

More

than

12

kHz

6008

Less

than

24

kHz

d

More

than

2

W

across

8

Q

loads

External

speaker

impedance

>

С

0)

=

m

—

A

EN

6

-—

ы

со

80

2

Recommended

duty

cycle:

1

minute

Transmit,

3

minutes

Reception

Circuits

and

ratings

are

subject

to

change

without

notice

due

to

advancement

in

technology.

3

ACCESSORIES

Unpack

your

new

transceiver

carefully,

and

examine

it

for

visible

damage

If

the

equipment

has

been

damaged

іп

shipment,

notify

the

transportation

company

immediately.

Save

the

boxes

and

packing

material

for

future

shipping.

The

following

accessories

should

be

included

in

the

box

with

the

transceiver.

DTMF

Microphone

(U.S.A.

CANADA

only)

.........

or

Dynamic

Microphone

(GENERAL

market

only)

.......

or

Dynamic

Microphone

(EUROPE

market

only)

........

Microphone

Hook

(U.S.A.

CANADA

only)

........

Mobile

Mounting

Kit

Bracket

оган

Screw

set

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

Self

tapping

Screw

(U.S.A.

CANADA

LL

Hex

wrench:

оаа

saad

Stacking

plate

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

T91-0380-X5

1

ea.

T91-0379-X5

1

ea.

T91-0382-X5

1

ea.

J20-0319-24

1

ea.

J29-0436-03

1

ea.

N99-0331-05

1

ea.

N46-3010-46

2

ea.

W01-0414-04

1

ea.

J21-4147-14

2

ea.

DC

power

Cable

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

E30-2111-05

1

ea.

Fuse

(TM-241A/241E:

15A)..

ҒО5-1531-05

1

ea.

(TM-441A/441E:

10A)..

FO5-1031-05

1

ea.

(TM-541A/5A1E:

8A)...

FO5-8021-05

1

ea.

Instruction

Manual

...........

В62-0031-ХХ

1

copy

Waranty

Card

rorot

жаа

EE

Fx

MS

l

ea.

(U.S.A.,

CANADA

,

EUROPE

market

s

only)

4

INSTALLATION

INSTRUCTIONS

4-1

INSTALLATION

Mounting

Bracket

When

installing

the

transceiver

in

a

vehicle

consider

the

ease

of

operation

and

safety

when

selecting

the

location

for

the

mounting

bracket.

1.

Install

the

bracket

using

the

supplied

flat

washers

and

self

tapping

screws

(

4

pcs.each).

2.

Attach

the

transceiver

loosely

using

the

4

SEMS

screws.

3.

Align

the

grooves

in

the

bracket

with

the

transceiver's

screws

(

Fig.

A)

and

slide

the

transceiver

to

the

rear.

4.

Adjust

the

viewing

angle

in

the

bracket

to

the

desired

position

(

Fig.

B).

5.

Hold

the

transceiver

in

place

and

tighten

the

4

SEMS

screws

using

the

supplied

wrench.

4-2

CONNECTION

4-2-1

Mobile

Installations

Cautions

:

1.

Before

installing

the

power

cable,

be

sure

to

remove

the

negative

lead

from

the

battery

for

safety.

2.

After

installation

and

wiring,

be

sure

to

double

check

for

correct

installation

before

reconnecting

|

the

negative

lead

to

the

battery

terminal.

|

3.

If

the

fuse

opens,

be

sure

to

check

that

each

.

conductor

has

not

been

damaged

by

short.

circuiting,

etc.

Then

replace

with

a

new

fuse

of

|

the

same

rating.

4.

After

completing

the

wiring,

wrap

the

fuse

holder

with

heat

resistant

tape

to

protect

against

heat

and

moisture.

5.

Do

not

remove

the

fuse

even

if

the

power

cable

is

too

long.

A.

Battery

Connections

Connect

the

power

cable

directly

to

the

battery

terminals.

Using

of

the

cigarette

lighter

socket

will

lead

to

a

poor

connection,

and

will

result

in

poor

performance.

Pay

close

attention

to

the

polarity

of

the

cables

when

connecting

them

to

the

battery.

Make

sure

the

positive

{

+)

and

negative

(-)

lead

polarity

is

correct

when

connecting

to

the

battery.

Engine

аша

ыт

сты

Passenger

compartment

Fuse

R

Select

a

location

whare

E

the

power

cable

is

pro-

l

!

tected

from

heat,

mois-

|

ture

or

abrasion

when

`

,

Securing

ће

the

cabe.

,

Red

9

\

To

the

\

transceiver

Make

sure

the

cable

does

not

directly

contact

the

edge

of

the

hole

by

using

a

grommet.

cable

Chassis

or

ee

PENES,

fire

wall

Battery

W

|f

the

wiring

hole

in

the

fire

wall

or

chassis

is

too

small,

disas-

semble

the

fuse

holder

to

thread

the

wire

through

the

hole.

From

passenger

compartment

Thread

like

this

B.

Ignition

Noise

This

transceiver

has

been

designed

to

suppress

ignition

noise;

however,

if

excessive

noise

is

present,

it

may

be

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.

PS-33

is

recommended.

outlet

until

81

other

connections

have

been

made.

2.

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)

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.

<<

M

Àá€——Á

——

—

A

5

OPERATION

5-1-1

CONTROL

FUNCTIONS

(22

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.

(3

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.

10

ALOCK

~

FEV

>

99606885588

AL

CTCSS

g

i

Ка

Б

5)

LOW/DIM

key

LOW

This

function

is

used

to

select

the

transmit

output

power

level

(НЕ,

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.

|

(6)

Microphone

connector

Attach

the

supplied

microphone

to

this

connector.

Тһе

out

of

the

connector

is

shown

in

the

accompanying

illustration.

%

GND

T

GNO

{Microphone

audio)

$

MIC

(Microphone

Audio)

(3)

RX

Audio

Output

2

PTT

(Approx

100

mV/10

к

ohm)

(Push

to

Talk)

3:

DWN

@

UP

5)

В

VOC

(Max

150

mA)

Kenwood TM-241A User manual

Popular Transceiver manuals by other brands