Kenwood TH-255A Bedienungsanleitung

INSTRUCTION MANUAL

09 08 07 06 05 04 03 02 01 00

144 MHz FM TRANSCEIVER

TH-255A

Thank You

We are grateful you decided to purchase this Kenwood FM

transceiver. Kenwood always provides Amateur Radio products

which surprise and excite serious hobbyists. This transceiver is no

exception. Kenwood believes that this product will satisfy your

requirements for both voice and data communications.

FeaTures

• Compact design

• Aluminum die-cast chassis

• High output power (up to 5 W operation)

• 100 memory channels or 50 channels with names

• Long operation period with a Ni-MH battery pack (optional)

WriTing ConvenTions FolloWed in This Manual

The writing conventions described below have been followed to

simplify instructions and avoid unnecessary repetition.

Instruction Action

Press [KEY]. Momentarily press [KEY].

Press [KEY] (1s). Press and hold [KEY] for 1 second or longer.

Press [F], [KEY].

Press the [F] key to enter Function mode,

then press [KEY] to access its secondary

function.

Press [KEY] + Power

ON.

With the transceiver power OFF, press and

hold [KEY] while turning the transceiver

power ON.

Notices to the User

◆Government law prohibits the operation of unlicensed radio

transmitters within the territories under government control.

◆Illegal operation is punishable by fine and/or imprisonment.

◆Refer service to qualified technicians only.

Safety: It is important that the operator is aware of, and

understands, hazards common to the operation of any

transceiver.

PrecaUtioNs

• Do not charge the transceiver and battery pack when they are wet.

• Ensure that there are no metallic items located between the

transceiver and the battery pack.

• Do not use options not specified by Kenwood.

• If the die-cast chassis or other transceiver part is damaged, do not

touch the damaged parts.

• If a headset or headphone is connected to the transceiver, reduce

the transceiver volume. Pay attention to the volume level when

turning the squelch off.

• Do not place the microphone cable around your neck while near

machinery that may catch the cable.

• Do not place the transceiver on unstable surfaces.

• Ensure that the end of the antenna does not touch your eyes.

• When the transceiver is used for transmission for many hours, the

radiator and chassis will become hot. Do not touch these locations

when replacing the battery pack.

• Do not immerse the transceiver in water.

• Always switch the transceiver power off before installing optional

accessories.

Turn the transceiver power off in the following locations:

• In explosive atmospheres (inflammable gas, dust particles,

metallic powders, grain powders, etc.).

• While taking on fuel or while parked at gasoline service stations.

• Near explosives or blasting sites.

• In aircrafts. (Any use of the transceiver must follow the

instructions and regulations provided by the airline crew.)

• Where restrictions or warnings are posted regarding the use of

radio devices, including but not limited to medical facilities.

• Near persons using pacemakers.

• Do not disassemble or modify the transceiver for any reason.

• Do not place the transceiver on or near airbag equipment while

the vehicle is running. When the airbag inflates, the transceiver

may be ejected and strike the driver or passengers.

• Do not transmit while touching the antenna terminal or if

any metallic parts are exposed from the antenna covering.

Transmitting at such a time may result in a high-frequency burn.

• If an abnormal odor or smoke is detected coming from the

transceiver, switch the transceiver power off immediately,

remove the battery pack from the transceiver, and contact your

Kenwood dealer.

• Use of the transceiver while you are driving may be against

traffic laws. Please check and observe the vehicle regulations

in your area.

• Do not expose the transceiver to extremely hot or cold

conditions.

• Do not carry the battery pack (or battery case) with metal

objects, as they may short the battery terminals.

• When operating the transceiver in areas where the air is dry, it

is easy to build up an electric charge (static electricity). When

using a earphone accessory in such conditions, it is possible for

the transceiver to send an electric shock through the earphone

and to your ear. We recommend you use only a speaker/

microphone in these conditions, to avoid electric shocks.

iii

One or more of the following statements may be

applicable:

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.

INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY

THE FCC

This equipment has been tested and found to comply with the limits

for a Class B digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against

harmful interference in a residential installation.

This equipment generates, uses and can generate radio frequency

energy and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio communications.

However, there is no guarantee that the interference will not occur

in a particular installation. If this equipment does cause harmful

interference to radio or television reception, which can be determined

by turning the equipment off and on, the user is encouraged to try to

correct the interference by one or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment to an outlet on a circuit different from that

to which the receiver is connected.

•Consult the dealer for technical assistance.

FCC REGULATIONS REGARDING THE USE OF THE

EMERGENCY CHANNEL

The communications must be for the purpose of soliciting or

rendering assistance to a traveler, or for communicating in an

emergency pertaining to the immediate safety of life or the immediate

protection of property.

CONTENTS

PREPARATION ..............................................................1

Supplied AcceSSorieS....................................................1

inStAlling the optionAl pB-43n ni-Mh BAttery pAck...............2

inStAlling AlkAline BAtterieS...........................................3

inStAlling the AntennA ..................................................4

inStAlling the Belt clip .................................................4

GETTING ACQUAINTED ...................................................5

keyS And controlS ......................................................5

diSplAy ...................................................................8

BASIC OPERATION ....................................................... 10

Switching the power on/oFF........................................ 10

AdjuSting the VoluMe ................................................. 10

VoluMe AdjuStMent operAtion Selection ............................ 10

AdjuSting the Squelch leVel ......................................... 11

Selecting AFrequency................................................. 12

direct Frequency entry............................................... 13

trAnSMitting ........................................................... 14

Selecting An output power........................................... 14

MENU SETUP.............................................................. 15

whAt iS AMenu?....................................................... 15

Menu AcceSS ........................................................... 15

OPERATING THROUGH REPEATERS.................................. 18

repeAter AcceSS ....................................................... 19

ActiVAting the tone Function ......................................... 20

Selecting Atone Frequency........................................... 21

tone Frequency id ScAn .............................................. 22

AutoMAtic repeAter oFFSet (k type only) ........................... 23

reVerSe Function ...................................................... 24

AutoMAtic SiMplex checker (ASc)................................... 24

MEMORY CHANNELS .................................................... 26

nuMBer oF MeMory chAnnelS ......................................... 26

SiMplex & repeAter or odd-Split MeMory chAnnel? .............. 27

Storing SiMplex FrequencieS or StAndArd repeAter FrequencieS.. 28

Storing odd-Split repeAter FrequencieS............................ 28

continuouSly Storing in SiMplex or Split chAnnelS ................ 29

recAlling AMeMory chAnnel ......................................... 30

cleAring AMeMory chAnnel .......................................... 31

nAMing AMeMory chAnnel ............................................ 32

MeMory -to- VFo trAnSFer........................................... 33

cAll chAnnel .......................................................... 34

recAlling the cAll chAnnel .......................................... 34

reprogrAMMing the cAll chAnnel .................................... 34

chAnnel diSplAy Mode ................................................ 35

SCAN ....................................................................... 36

Selecting AScAn reSuMe Method .................................... 37

BAnd ScAn.............................................................. 37

progrAM ScAn ......................................................... 38

MeMory ScAn .......................................................... 39

cAll ScAn .............................................................. 40

priority ScAn .......................................................... 40

MeMory chAnnel lockout............................................. 42

SELECTIVE CALL ......................................................... 43

continuouS tone coded Squelch SySteM (ctcSS) ................. 43

digitAl coded Squelch (dcS) ........................................ 46

DTMF FUNCTIONS ....................................................... 49

MAnuAl diAling ........................................................ 49

dtMF tx hold........................................................ 50

AutoMAtic diAler ...................................................... 50

AdjuSting the dtMF tone trAnSMiSSion Speed...................... 52

AdjuSting the pAuSe durAtion ........................................ 52

dtMF lock ............................................................ 53

AUXILIARY FUNCTIONS ................................................ 54

Apo (Auto power oFF) ............................................... 54

reMAining BAttery cApAcity .......................................... 54

BAttery SAVer ......................................................... 55

BeAt ShiFt.............................................................. 56

Beep Function.......................................................... 57

BuSy chAnnel lockout ................................................ 57

Frequency Step Size ................................................... 58

BAck light ............................................................. 58

lock Function.......................................................... 59

Selector unlock....................................................... 59

Microphone key lock ................................................. 60

Microphone pF keyS (optionAl)...................................... 60

Monitor ................................................................ 62

power onMeSSAge .................................................... 62

progrAMMABle VFo ................................................... 63

tiMe-out tiMer ........................................................ 64

tx inhiBit .............................................................. 64

eMergency Siren ....................................................... 65

MiniMuM/ MAxiMuM VoluMe ........................................... 66

SpeAker AttenuAtion .................................................. 67

power onpASSword..................................................... 67

OPTIONAL ACCESSORIES .............................................. 69

MAINTENANCE ........................................................... 70

generAl inForMAtion .................................................. 70

SerVice ................................................................. 70

cleAning................................................................ 71

MicroproceSSor reSet ................................................ 71

operAtion noticeS ..................................................... 73

receiVing SignAlS in citieS ............................................ 73

trAnSMiSSion ........................................................... 73

internAl BeAtS ......................................................... 73

TROUBLESHOOTING..................................................... 74

SPECIFICATIONS ......................................................... 77

PREPARATION

Supplied AcceSSorieS

After carefully unpacking the transceiver, identify the items listed in

the table below. We recommend you keep the box and packings

for the shipping.

Item Part Number Quantity

Antenna T90-1018-XX 1

Belt clip J29-0623-XX 1

Screw set N99-2066-XX 1

Instruction manual B62-1981-XX 1

Antenna Belt clip Screw set

inStAlling the optionAl pB-43n ni-Mh BAttery pAck

Note: The battery pack is not charged at the factory, you must charge

the battery pack before using it with the transceiver.

1Unlock (open) the safety catch located at the bottom of the

battery pack.

2Match the guides of the battery pack with the corresponding

grooves on the upper rear of the transceiver, then firmly press

the battery case to lock it in place.

3Flip the safety catch into place to prevent accidentally pressing

the release latch and removing the battery pack.

4To remove the battery pack, lift the safety catch, then press the

release latch to unlock the battery pack. Lift the battery pack

away from the transceiver.

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