Kenwood TK-2406 User manual

INSTRUCTION MANUAL
© B62-2481-00 (M)
09 08 07 06 05 04 03 02 01 00
VHF FM TRANSCEIVER
TK-2406
UHF FM TRANSCEIVER
TK-3406

THANK YOU
We are grateful you have chosen KENWOOD for your land
mobile radio applications.
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.
Firmware Copyrights
The title to and ownership of copyrights for firmware embedded in KENWOOD
product memories are reserved for JVC KENWOOD Corporation.
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.
• The charger is the device that disconnects the unit from the AC
mains line. The AC plug should be readily accessible.

i
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
an 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.

ii
Information concerning the battery pack:
The battery pack includes flammable objects such as organic
solvent. Mishandling may cause the battery to rupture
producing flames or extreme heat, deteriorate, or cause other
forms of damage to the battery. Please observe the following
prohibitive matters.
• Do not disassemble or reconstruct battery!
The battery pack has a safety function and protection circuit to
avoid danger. If they suffer serious damage, the battery may
generate heat or smoke, rupture, or burst into flame.
• Do not short-circuit the battery!
Do not join the + and – terminals using any form of metal (such
as a paper clip or wire). Do not carry or store the battery pack in
containers holding metal objects (such as wires, chain-necklace or
hairpins). If the battery pack is short-circuited, excessive current will
flow and the battery may generate heat or smoke, rupture, or burst
into flame. It will also cause metal objects to heat up.
• Do not incinerate or apply heat to the battery!
If the insulator is melted, the gas release vent or safety function is
damaged, or the electrolyte is ignited, the battery may generate
heat or smoke, rupture, or burst into flame.
• Do not leave the battery near fire, stoves, or other heat
generators (areas reaching over 80°C/ 176°F)!
If the polymer separator is melted due to high temperature, an
internal short-circuit may occur in the individual cells and the
battery may generate heat or smoke, rupture, or burst into flame.
• Do not immerse the battery in water or get it wet by other
means!
If the battery’s protection circuit is damaged, the battery may
charge at extreme current (or voltage) and an abnormal chemical
reaction may occur. The battery may generate heat or smoke,
rupture, or burst into flame.
• Do not charge the battery near fire or under direct sunlight!
If the battery’s protection circuit is damaged, the battery may
charge at extreme current (or voltage) and an abnormal chemical
reaction may occur. The battery may generate heat or smoke,
rupture, or burst into flame.

iii
• Use only the specified charger and observe charging
requirements!
If the battery is charged in unspecified conditions (under high
temperature over the regulated value, excessive high voltage or
current over regulated value, or with a remodeled charger), it may
overcharge or an abnormal chemical reaction may occur. The
battery may generate heat or smoke, rupture, or burst into flame.
• Do not pierce the battery with any object, strike it with an
instrument, or step on it!
This may break or deform the battery, causing a short-circuit. The
battery may generate heat or smoke, rupture, or burst into flame.
• Do not jar or throw the battery!
An impact may cause the battery to leak, generate heat or smoke,
rupture, and/or burst into flame. If the battery’s protection circuit
is damaged, the battery may charge at an abnormal current (or
voltage), and an abnormal chemical reaction may occur. The
battery may generate heat or smoke, rupture, or burst into flame.
• Do not use the battery pack if it is damaged in any way!
The battery may generate heat or smoke, rupture, or burst into
flame.
• Do not solder directly onto the battery!
If the insulator is melted or the gas release vent or safety function
is damaged, the battery may generate heat or smoke, rupture, or
burst into flame.
• Do not reverse the battery polarity (and terminals)!
When charging a reversed battery, an abnormal chemical reaction
may occur. In some cases, an unexpected large amount of current
may flow upon discharging. The battery may generate heat or
smoke, rupture, or burst into flame.
• Do not reverse-charge or reverse-connect the battery!
The battery pack has positive and negative poles. If the battery
pack does not smoothly connect with a charger or operating
equipment, do not force it; check the polarity of the battery. If the
battery pack is reverse-connected to the charger, it will be reverse-
charged and an abnormal chemical reaction may occur. The
battery may generate heat or smoke, rupture, or burst into flame.

iv
• Do not touch a ruptured and leaking battery!
If the electrolyte liquid from the battery gets into your eyes, wash
your eyes with fresh water as soon as possible, without rubbing
your eyes. Go to the hospital immediately. If left untreated, it may
cause eye-problems.
• Do not charge the battery for longer than the specified time!
If the battery pack has not finished charging even after the
regulated time has passed, stop it. The battery may generate heat
or smoke, rupture, or burst into flame.
• Do not place the battery pack into a microwave or high
pressure container!
The battery may generate heat or smoke, rupture, or burst into
flame.
• Keep ruptured and leaking battery packs away from fire!
If the battery pack is leaking (or the battery emits a bad odor),
immediately remove it from flammable areas. Electrolyte leaking
from battery can easily catch on fire and may cause the battery to
generate smoke or burst into flame.
• Do not use an abnormal battery!
If the battery pack emits a bad odor, appears to have different
coloring, is deformed, or seems abnormal for any other reason,
remove it from the charger or operating equipment and do not use
it. The battery may generate heat or smoke, rupture, or burst into
flame.

1
CONTENTS
UNPACKING AND CHECKING EQUIPMENT.........................1
PREPARATION .........................................................2
ORIENTATION ..........................................................7
PROGRAMMABLE AUXILIARY FUNCTIONS........................8
BASIC OPERATIONS ................................................ 11
VOICE OPERATED TRANSMISSION (VOX) ....................... 12
BACKGROUND OPERATIONS ...................................... 13
UNPACKING AND CHECKING EQUIPMENT
Carefully unpack the transceiver. If any of the items listed
below are missing or damaged, file a claim with the carrier
immediately.
SUPPLIED ACCESSORIES
• Battery charger/ AC adapter (KSC-43)...................................1
• Ni-MH Battery pack (KNB-53N)..............................................1
• Speaker/ microphone jack cover ............................................1
• Speaker/ microphone locking bracket ....................................1
• Belt clip (KBH-10)...................................................................1
• Screw (M3 x 8 mm) ................................................................2
• Channel stopper .....................................................................1
• Instruction manual ..................................................................1
Note: Refer to "PREPARATION" for accessory installation
instructions.

2
PREPARATION
INSTALLING THE CHANNEL STOPPER
For transceivers with less than 16 channels, insert a Channel
stopper.
1 Set the Channel selector to channel 1, then pull the Channel
selector knob off the transceiver.
• If the Channel selector is not positioned at channel 1, the
Channel selector knob may not install correctly and the channel
may be unable to be changed.
2 Insert the channel stopper.
3 Set the arrow of the Channel stopper to the highest channel
number for the transceiver.
• You can set the Channel stopper position for channels 2, 4, 6,
8, 10, 12, and 14.
4 Reinsert the Channel selector knob.
Channel stopper
Arrow
INSTALLING THE (OPTIONAL) ANTENNA
Screw the antenna into the connector on
the top of the transceiver by holding the
antenna at its base and turning it clockwise
until secure.
Note: The antenna is neither a handle, a
key ring retainer, nor a speaker/ microphone
attachment point. Using the antenna in these
ways may damage the antenna and degrade
your transceiver’s performance.
Antenna

3
INSTALLING/ REMOVING THE BATTERY PACK
◆Do not short the battery terminals or dispose of the battery by fire.
◆Never attempt to remove the casing from the battery pack.
1Align the battery pack with the back
of the transceiver, then press the
battery pack and transceiver firmly
together until the release latch on
the base of the transceiver locks.
2To remove the battery pack, lift
the safety catch on the base of the
transceiver, then press the release
latch underneath the safety catch.
3While pressing the release latch,
pull the battery pack away from the
transceiver.
INSTALLING THE BELT CLIP
Do not use glue which is designed to prevent screw loosening when
installing the belt clip, as it may cause damage to the transceiver. Acrylic
ester, which is contained in these glues, may crack the transceiver’s
back panel.
Belt clip
If necessary, attach the belt clip using
the two supplied M3 x 8 mm screws.
Note: If the belt clip is not installed, its
mounting location may get hot during
continuous transmission or when left
sitting in a hot environment.

4
CHARGING THE BATTERY PACK
The battery pack is not charged at the factory; charge it before
use.
ATTENTION: Always switch OFF a transceiver equipped with a
battery pack before inserting the transceiver into the charger.
1Plug the AC adapter cable into the jack located on the rear
of the charger.
2Plug the AC adapter into an AC outlet.
3Match the Holder to the type of battery pack to be charged
so that when inserting the Holder, the battery type name
can be seen on the bottom of the charger. After inserting the
Holder into the charger, press the locking tabs to secure it in
place.
Holder
Li-ion battery
charger
Ni-MH battery
charger
• To remove the Holder, squeeze the locking tabs together then
pull the Holder out of the charger.
4Slide a battery pack or a transceiver equipped with a battery
pack into the charging slot of the charger.
• Make sure the metal contacts of the battery pack mate securely
with the charger terminals.
• The indicator lights red and charging begins.
Indicator

5
5When charging is completed, the indicator lights green.
Remove the battery pack or the transceiver from the
charging slot of the charger.
• It takes approximately 3 hours to charge the battery pack.
• When the charger will not be used for a long time, unplug the
AC adapter from the AC outlet.
Note:
◆When the indicator blinks red, the battery pack is either defective or
the battery pack contacts are not properly mated with those of the
charger.
◆When the indicator flashes green and orange, the battery pack
has not satisfied the charging start temperature. Remove the
battery pack from the charger and wait until it reaches a normal
temperature before charging it again.
◆The ambient temperature should be between 41°F and 104°F (5°C
and 40°C) while charging is in progress. Charging outside this range
may not fully charge the battery.
◆The battery pack life is over when its operating time decreases even
though it is fully and correctly charged. Replace the battery pack.
INSTALLING THE CAP OVER THE SPEAKER/
MICROPHONE JACKS
Install the cap over the speaker/ microphone jacks when not
using an optional speaker/ microphone.
Note: To keep the transceiver water resistant, you must cover the
speaker/ microphone jacks with the supplied cap.
1Place the cap over the jacks so that the locking tabs
insert into the transceiver grooves.
2While holding the cap in place, push it towards the
bottom of the transceiver until the tabs on the cap click
into place.
• To remove the cap, hold the top of the cap in place
with your finger while inserting a
2 mm or smaller flat blade screwdriver under the
bottom of the cap. Slowly slide the screwdriver
in until its tip touches the tab inside the cap, then
gently pry the cap up (handle of screwdriver moving
away from the transceiver) to remove the cap.

6
INSTALLING THE OPTIONAL SPEAKER/ MICROPHONE
(OR HEADSET)
Note: The transceiver is not fully water resistant when using a
speaker/ microphone or headset.
1 Insert the speaker/ microphone (or
headset ) plugs into the speaker/
microphone jacks of the transceiver.
2Place the locking bracket over the
speaker/ microphone (or headset) plugs
so that the locking tabs insert into the
transceiver grooves.
• Push down on the locking bracket to
slide it into place.
3While holding the locking bracket in
place, push it towards the bottom of the
transceiver until the tabs on the bracket
click into place.
• To remove the locking bracket, push
the bracket up from the base.

7
ORIENTATION
Channel selector
Rotate to change the operating channel.
• Channel Annunciation: When changing channels, the
transceiver will announce the newly selected channel number (if
enabled by your dealer).
LED indicator
For the LED indicator status, refer to page 11.
Power switch/ Volume control
Turn clockwise to switch ON the transceiver. To switch OFF
the transceiver, turn counterclockwise until a click sounds.
Rotate to adjust the volume level.
PTT (Push to Talk) switch
Press and hold, then speak around the microphone area to
transmit.
Side 1 key {refer to page 8}
Press to activate its programmable function.
Side 2 key {refer to page 8}
Press to activate its programmable function.
Speaker/ microphone jacks
Insert the Speaker/ microphone or Headset plug into this jack.
Battery pack
Antenna
Microphone Speaker

8
PROGRAMMABLE AUXILIARY FUNCTIONS
Your dealer can program the Side 1 and Side 2 keys each with
one of the following functions.
Note: The duration of pressing a key to activate a function is
dependent on your dealer setting. Your dealer may have set
some keys to be held down for a short duration instead of being
momentarily pressed. Ask your dealer for details on which keys
need to be held down to activate their functions.
■None
No function has been programmed.
■2-Tone
Press this key to transmit a 2-tone code.
■Autodial
DTMF Autodial allows you to make a private call to another
party.
■Calling Alert
A calling alert tone allows you to alert party members that
you are making a call. When making a call, first hold down
this key.
• While holding down the key, the calling alert tone will sound.
Release the key to end the tone, then hold down the PTT switch
and speak into the microphone to transmit.
■Emergency
Press and hold this key to enter Emergency mode.
■Key Lock
Press this key to lock /unlock the transceiver keys. Without
Status Memory, when the transceiver power is turned OFF
and then ON again, the Key Lock function will be cancelled.

9
■Key Lock with Status Memory
This operates the same as Key Lock except that when the
transceiver power is turned OFF and then ON again, the
keys remains locked.
■Lone Worker
Lone Worker Mode is a safety feature built into the
transceiver. If the transceiver is not operated for a pre-
programmed period of time, the transceiver will emit a tone
and automatically enter Emergency operation.
Press this key to toggle the Lone Worker function ON or
OFF.
■Low Transmit Power
Each channel is programmed with either high or low
transmit power. On high transmit power channels, press
this key to change the transmit power to low power (you
cannot change low transmit power channels to use high
power).
■Monitor
Press this key to deactivate signaling (QT/DQT, FleetSync
signaling, etc.). Press the key again to return to normal
operation.
■Monitor Momentary
Continuously hold down this key to deactivate signaling
(QT/DQT, FleetSync signaling, etc.). Release the key to
return to normal operation.
■Paging Call
Press this key to send a FleetSync paging call to an ID from
the ID list.
■Priority-channel Select
If the scan priority type is “Operator Selectable”, press
this key in normal mode to set the current channel as the
priority channel.

10
■Scan
Press this key to start scanning the transceiver channels.
■Scan + Temporary Delete
Scan pauses at an undesired channel, you can remove that
channel from the scanning sequence by press or hold this
key.
■Scrambler
The Scrambler function allows you to hold a conversation
in complete privacy. When activated, any other party
listening in on your channel will be unable to understand
your conversation. Press this key to toggle the Scrambler
function ON or OFF.
Note: This function cannot be used in certain countries. Contact
KENWOOD dealer for further information.
■Send the GPS data
Press this key when the GPS unit has been installed to
send your positioning data to the base station.
■Squelch Off
Press this key to hear background noise. Press the key
again to return to normal operation.
■Squelch Off Momentary
Continuously hold down this key to hear background noise.
Release the key to return to normal operation.
■Status 1/ Status 2
Press this key to send a status.
■Talk Around
The Talk Around function allows you to communicate
directly with other transceivers, without the use of a
repeater. Press this key to toggle the Talk Around function
ON or OFF.

11
BASIC OPERATIONS
1Turn the Power switch/ Volume control clockwise to switch
the transceiver power ON.
• A beep sounds if enabled by your dealer.
2Press the key programmed with the [Monitor] or [Squelch
Off] function to hear background noise, then rotate the
Power switch/ Volume control to adjust the volume.
3Rotate the Channel selector to select your desired channel.
• When you receive an appropriate signal, you will hear audio
from the speaker.
4To make a call, press and hold the PTT switch, then speak
around the microphone area using your normal speaking voice.
• Hold the microphone approximately 1.5 inches (3 to 4 cm) from
your lips.
5Release the PTT switch to receive.
Note: When the battery pack voltage becomes too low, transmission
will stop and an alert tone will sound.
LED Indicator Status
Indicator Color Meaning
Lights red Transmitting
Lights green Receiving a call
Blinks red Battery power is low while transmitting
Blinks green Scanning
Blinks orange/
blue *
Receiving an encoded call (FleetSync
signaling, etc.)
Blinks red/orange The selected channel has not been
programmed and cannot be used.
*Your dealer can set the LED to blink either orange or blue for
FleetSync, DTMF, or 2-tone operation.

12
VOICE OPERATED TRANSMISSION (VOX)
VOX operation allows you to transmit hands-free. This feature
must first be activated by your dealer, and can only be used if
you are using a supported headset. This function can be turned
off for specific channels by your dealer.
To activate VOX and set the VOX Gain level, perform the
following steps:
1Connect the headset to the transceiver .
• The VOX function does not activate when a headset is not
connected to the accessory terminal of the transceiver.
2With the transceiver power OFF, press and hold the Side 1
key while turning the transceiver power ON.
3Continue to hold the Side 1 key until a beep sounds.
• The LED indicator lights orange.
•When the Side 1 key is released, the transceiver will
announces the VOX Gain level.
4Press the Side 1 key to select the VOX Gain level of the radio.
• Press the Side 2 key to enable or disable the VOX function for
the current channel (you can change this setting for each channel
by selecting a channel with the Channel selector). When turned
ON, a beep sounds. When turned OFF, a double beep sounds.
5Press the PTT switch to save the setting.
• A beep will sound.
• The transceiver announces the new VOX Gain level.
6Turn the transceiver power OFF and the ON again to
activate VOX.
Note:
◆The transceiver will automatically return to normal operation if no
action is performed for 20 seconds.
◆VOX Gain level 1 is the least sensitive and VOX Gain level is 10 is
the most sensitive.
◆If a headset is connected to the transceiver while the VOX function
is switched ON and the VOX Gain level is configured to a higher,
more sensitive level, louder received signals may cause the
transceiver to start transmission.

13
BACKGROUND OPERATIONS
TIME-OUT TIMER (TOT)
The Time-out Timer prevents callers from using a channel
for an extended duration. If you continuously transmit for the
duration programmed by your dealer (default is 1 minute),
transmission will stop and an alert tone will sound. To stop the
tone, release the PTT switch.
BATTERY SAVER
When activated by your dealer, the Battery Saver function
decreases the amount of power used after no signal is present
and no operations are being performed for 5 seconds. When a
signal is received or an operation is performed, Battery Saver
turns off.
Note: While the Battery Saver is operating, the LED may flash
green when receiving a QT/DQT signal which does not match the
QT/DQT tone/code set up in your transceiver.
LOW BATTERY WARNING
While operating the transceiver, the Low Battery Warning
sounds an alert tone every 30 seconds and the LED indicator
blinks red when the battery needs recharged or replaced.
BUSY CHANNEL LOCKOUT (BCL)
When activated, BCL prevents you from interfering on a
channel that is already in use. Pressing the PTT switch will
cause an alert tone to sound and the transceiver will not
transmit. Release the PTT switch to stop the tone.
Note: Ask your dealer for an explanation on how BCL functions
when using QT, DQT, DTMF, or FleetSync signaling.

14
SIGNALING
■QT/ DQT
The Encoder/Decoder function uses QT/ DQT to segregate
talk groups, so users only hear calls from their own group.
■DTMF
A DTMF PTT ID is included for dispatch operations or
simple remote control applications.
The DTMF decode capabilities include Selective Call ID,
Transpond with ID, and “Wild Card” Group Calling.
■FleetSync
Utilizing JVC KENWOOD’s FleetSync digital signaling
protocol, this transceiver has PTT ID and Selective Calling
capabilities for managed dispatch operations.
For hazardous/hostile duty environments, a Side1 or Side
2key can be programmed for Emergency status to alert the
dispatcher and/or operator in distress.
■MDC-1200
The following features are available with the built-in MDC
signaling: PTT ID Encode, Emergency Encode, Stun/
Revive Decode, and Radio Check Decode.
■STUN
When a transceiver is lost or stolen (for example), your
dispatcher can transmit a stun code to that transceiver to
disable transmission or transmission/reception. Stun can be
cancelled with a stun reset code.
BEGINNING/ END OF TRANSMISSION SIGNAL
The Beginning/ End of Transmission identification signals are
used to access some repeaters and telephone systems. The
Beginning of Transmission ID signal is transmitted when you
press the PTT switch and the End of Transmission ID signal is
transmitted when you release the PTT switch.