Kenwood TM-261A User Manual

Name: Kenwood TM-261A
Brand: Kenwood
SKU: 1602842
Rating: 4.5 (2 reviews)

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	144 MHz FM TRANSCEIVER
A TM-261A
m	144 MHz FM TRANSCEIVER ________
	TM-261EJ

430/440 MHz FM TRANSCEIVER

TM-461A

INSTRUCTION MANUAL

o	KENWOOD CORPORATION
o

09 08 07 06 05 04 03 02 01 00

THANK YOU!

We are grateful you decided to purchase this KENWOOD FM transceiver. This series of mobile transceivers were developed to satisfy the requirement for a compact rig that’s simple to operate yet has superior performance. Users of this series will discover the transceiver’s Menu Set-up method for feature configuration recently incorporated in other KENWOOD products.

KENWOOD believes that the compact size coupled with the reasonable cost will guarantee your satisfaction with this product.

MODELS COVERED BY THIS MANUAL

The models listed below are covered by this manual.

TM-261 A: 144 M Hz FM transceiver (U.S.A./ Canada/ General market)

TM-261 EJ: 144 MHz FM transceiver (General market)

TM-461A: 440 MHz FM transceiver (U.S.A./ Canada)

430 MHz FM transceiver (China/ General market)

FEATURES

Memory Indexing conveniently allows you to assign nam s to memory channels. Use callsigns, repeater names, cities, persons’ names, etc.

In Memory Recall mode, memory channel numbers can be displayed instead of frequencies if you choose.

Innovative Menu Set-up method combines sophisticated features with simple operation; ergonomic design places only the most frequently-used keys on the Front Panel without losing desired features.

Dual Tone Squelch System (DTSS) allows selective calling of specific stations.

Programmable with a RX Tone and TXTone separately. This enhances the optional Continuous Tone Coded Squelch System (CTCSS).

NOTICES TO THE USER

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.

PRECAUTIONS

Please c sen/e the following precautions to prevent fire, personal injury, and transceiver damage:

•When operating mobile, do not attempt to configure your transceiver while driving because it is simply too dangerous.

•Be aware of local laws pertaining to the use of headphones/headsets while driving on public roads.

If in doubt, do not wear headphones while mobiling.

•Do not transmit with high output power for extended periods. The transceiver may overheat.

•Do not modify this transceiver unless instructed by this manual or by KENWOOD documentation.

•Do not expose the transceiver to long periods of direct sunlight nor place the transceiver close to heating appliances.

•Do not place the transceiver in excessively dusty areas, humid areas, nor on unstable surfaces.

•If an abnormal odor or smoke is detected coming from the transceiver, turn OFF the power immediately. Contact a KENWOOD service station or your dealer.

•The transceiver is designed for a 13.8 V power source. Never use a 24 V battery to power the transceiver.

CONTENTS

THANK YOU!.........................................................		Inside FrontCover
MODELS COVERED BY
THIS MANUAL.........................................	Inside FrontCover
FEATURES............................................................		Inside FrontCover
NOTICES TO THE USER .........................................................		i
PRECAUTIONS........................................................................		i
SUPPLIED ACCESSORIES....................................................		1
CONVENTIONS FOLLOWED IN THIS MANUAL		.................. 1
PREPARATION FOR MOBILE AND FIXED STATION OPERATION
MOBILE INSTALLATION.......................................................		2
Installation Example.......................................................		2
Installation Steps............................................................		2
DC POWER CABLE CONNECTION.....................................		3
Mobile Operation.............................................................		3
Fixed Station Operation..................................................		4
Replacing Fuses..............................................................		5
ANTENNA CONNECTION......................................................		5
ACCESSORY CONNECTIONS............................................		6
Externa! Speaker.............................................................		6
Microphone......................................................................		6

GBTIHGACQUAINTED
FRONT PANEL.......................................................................	7
REAR PANEL.........................................................................	9
MICROPHONE.......................................................................	10
DISPLAY................................................................................	11
BUTTON FUNCTION DISPLAY............................................	13
Basic State Display Labels...........................................	13
Labels After Pressing [F]..............................................	13
OPERATING BASICS
	D
SWITCHING POWER ON/OFF.............................................	14
ADJUSTING VOLUME..........................................................	14
ADJUSTING SQUELCH .......................................................	14
SELECTING FREQUENCIES...............................................	15
Tuning Control...............................................................	15
Microphone [UP]/[DWN] Buttons.................................	15
TRANSMITTING....................................................................	16
Selecting Output Power................................................	16
MENUSET4JP	3
MENU DESCRIPTION...........................................................	17

MENU ACCESS....................................................................	17
MENU A CONFIGURATION.................................................	18
MENU B CONFIGURATION.................................................	19
OPERATtNG THROtJeH REPEATERS j
REPEATER ACCESS...........................................................	20
Selecting Offset Frequency.........................................	21
Selecting Offset Direction............................................	22
Automatic Repeater Offset
(Some TM-261A Versions Only)...................................	22
Activating Tone Function.............................................	22
Selecting a Tone Frequency.........................................	23
REVERSE FUNCTION ........................................................	23
MEMORY CHANNELS
STORING DATA IN MEMORY.............................................	24
Simplex Memory Channels...........................................	25
Split Memory Channels.................................................	25
RECALLING MEMORY CHANNELS...................................	26
ERASING MEMORY CHANNELS........................................	26
CALL CHANNEL..................................................................	27
Recalling the Call Channel...........................................	27
Changing Call Channel Contents (Simplex)...............	27
Changing Call Channel Contents (Split).....................	28
MEMORY ^ VFO TRANSFERS...........................................	28

INITIALIZING MEMORY ......................................................	29
Partial Reset (VFO)........................................................	29
Full Reset (Memory)......................................................	29
CHANNEL DISPLAY FUNCTION.........................................	29
NAMING MEMORY CHANNELS .........................................	30
Storing a Name in Memory...........................................	30
^ SCAN	)
SCAN RESUME METHODS.................................................	31
Time-Operated Scan.....................................................	31
Carrier-Operated Scan..................................................	31
VFO SCAN.............................................................................	32
MEMORY SCAN....................................................................	32
Locking Out Memory Channels....................................	33
PROGRAM SCAN.................................................................	34
Setting Scan Limits........................................................	34
Confirming Scan Limits.................................................	34
Using Program Scan......................................................	35
CALLA/FO SCAN..................................................................	35
CALL7MEMORY SCAN........................................................	35
CONTINUOUS TONE CODED SQUaCH SYSTEM (CTCSS)
USING CTCSS.......................................................................	36
Automatic Tone Frequency ID......................................	36

□

[10

□

[12’

[13

[15

E DUAL TONE SQUELCH SYSTEM (DTSS)
STORING DTSS CODES.....................................................	37
Using the Tuning Control or
Microphone [UP]/[DWN]...............................................	37
Using the Microphone DTMF Keypad.........................	37
Setting a Group Code...................................................	38
USING DTSS........................................................................	39
DTSS and Repeaters.....................................................	39

DUAL TONE MULTf-FREQUENCY (OTWF) FUNCTIONS______________

MAKING DTMF CALLS.......................................................	40
STORING DTMF NUMBERS FOR THE
AUTOMATIC DIALER..........................................................	40
CONFIRMING STORED DTMF NUMBERS........................	41
TRANSMITTING STORED DTMF NUMBERS ...................	41
AUTOPATCH (U.S.A. AND CANADA VERSIONS) . 42
Ш AUXILIARY FUNCTIONS
FULL RESET........................................................................	43
KEYPAD DIRECT ENTRY...................................................	43
Frequency Entry............................................................	43
Memory Channel Number Entry..................................	44
CHANGING FREQUENCY STEP SIZE..............................	45
Changes in Displayed Frequencies............................	45

TIME-OUT TIMER (TOT) .....................................................	46
BUSY CHANNEL LOCKOUT...............................................	46
AUTOMATIC POWER OFF (APO).......................................	46
TRANSCEIVER LOCK..........................................................	46
CONFIGURING PROGRAM FUNCTION KEYS..................	47
Programming Microphone [PF].................................	48
SWITCHING AM/FM MODE
(SOME TM-261A VERSIONS ONLY)...................................	48
PACKET OPERATION	~)
1200 bps OPERATION........................................................	49
MAiNTENANCE
GENERAL INFORMATION..................................................	50
SERVICE...............................................................................	50
SERVICE NOTE....................................................................	50
CLEANING ...........................................................................	50
TROUBLESHOOTING.........................................................	51
OPTIONAL ACCESSORteS	~]
INSTALLIN6 OPTIONS	^
INSTALLING THE TSU-8 CTCSS UNIT.............................	54
[ SPECIFICATIONS
[ INDEX

SUPPLIED ACCESSORIES

	Part Numlrnr	Quantity
Microphone
U.S.A./Canada/	T91-0568-XX
General (some): MC-53DM^	T91-0568-XX	1
China/	T91-0516-XX
General (some): MC-45^	T91-0516-XX	1

DC power cable	E 30-2111-XX	1

Transceiver fuse
TM-261A: 15 A	F51-0017-XX	1
TM-261EJ: 4 A	F51-0013-XX	1
TM-461A: 10 A	F51-0016-XX	1

Mounting bracket	J29-0628-XX	1

Mounting bracket screws	N99-0331-XX	1 set
Wrench	W01-0433-XX	1

Warrantycard	—	1
(U.S.A./Canada only)		1



Instruction manual	B62-0605-XX	1

The MC-53DM and MC-45 microphones are sold as optional accessories also {page 53}.

CONVENTIONS FOLLOWED IN THIS MANUAL

The writing conventions described below have been followed to simplify instructions and avoid unnecessary repetition.

ATTENTION: Most procedures require that you press an appropriate key in each step within approximately 10 seconds, or the previous mode will be restored.

Instruclloii	Wltattofto
Press [KEY].	Press and release KEY,

Prpcc	Press and hold KEY1 down,
[KEY1]+[KEY2],	then press KEY2.

PrpCQ	Press KEY1 momentarily,
[KEY1], [KEY2].	release KEY1, then press
	KEY2.

PpgQg	With transceiver power OFF,
[KEY]+ POWER ON.	press and hold KEY, then turn
	ON the transceiver power by
	pressing [POWER].

Press	Press and hold the Function
[F] (1 s).	key for 1 second or longer.

Press	Press and hold KEY until the
[KEY] (1 s).	function begins.

Press	Press [F] momentarily, release
[F], [KEY] (1 s).	[F], then press and hold KEY
	for 1 second or longer.

PREPARATION FOR MOBILE AND FIXED STATION OPERATION

11 MOBILE INSTALLATION

Install the transceiver in a safe, convenient position inside your vehicle that minimizes danger to your passengers and yourself while the vehicle is in motion. For example, consider installing the transceiver under the dash in front of the passenger seat so that knees or legs will not strike the radio during sudden braking of your vehicle. Try to pick a well-ventilated location that is shielded from direct sunlight.

■ Installation Example

Use the supplied mounting bracket to install the transceiver inside your vehicle. To enjoy the best viewing angle, you can position the transceiver in the bracket in a number of ways as shown below.

—Iin^

Installation Steps

1Install the mounting bracket in the vehicle using the supplied flat washers and self-tapping screws. There are 4 washers and 4 screws supplied.

• The bracket can be mounted with the bracket opening for the transceiver facing down for underdash mounting, or with the opening facing up.

If mounted underdash, the bracket must be installed so that the 3 screw holes on the edge of each bracket side are facing forward. This allows you to mount the transceiver horizontally or to angle it fonvard.

If mounted with the bracket opening facing upward, position the bracket with the 3 holes facing the rear to angle the transceiver upward. Position the bracket with the 3 holes facing forward if you plan to angle the transceiver downward. The transceiver can be mounted horizontally, angled neither up nor down, with the bracket positioned either way.

2Position the transceiver, then insert and tighten the supplied hexagon SEMS screws and washers.

There are 2 screws and 2 washers supplied for each side of the bracket.

• Double check that all hardware is tightened to prevent vehicle vibration from loosening the bracket or transceiver.

SEMS screw

DC POWER CABLE CONNECTION

■ Mobile Operation

The vehicle battery must have a nominal rating of 12 V. Never connect the transceiver to a 24 V battery. Be sure to use a 12 V vehicle battery that has sufficient current capacity. If the current to the transceiver is insufficient, the Display may darken during transmission, or transmit output power may drop excessively.

1Route the DC power cable supplied with the transceiver directly to the vehicle’s battery terminals using the shortest path from the transceiver.

•If using a noise filter, it should be installed with an insulator to prevent it from touching metal on the vehicle.

•It is not recommended to use the cigarette lighter socket since some cigarette lighter sockets introduce an unacceptable voltage drop.

•If the power cable must be routed through a hole in the vehicle chassis or body, for example in the firewall at the front of the passenger compartment, use a rubber grommet to protect the cable from abrasion. Dismantle the fuse holder to pass the cable through the firewall.

After the cable is in place, wind heat-resistant tape arc .nd the fuse holder to protect it from moisture. Tie down the full run of cable.

To prevent the risk of short circuits, disconnect other wiring from the negative (-) battery terminal before connecting the transceiver.

Confirm the correct polarity of the connections, and attach the power cable to the battery terminals; red connects to the positive (-i-) terminal, black connects to the negative (-) terminal.

• Use the full length of the cable without cutting off excess even if the cable is longer than required. In particular, never remove the fuse holders from the

5Reconnect any wiring removed from the negative terminal.

6Connect the DC power cable to the transceiver’s power supply connector.

•Press the connectors firmly together until the locking

The entire length of the cable must be dressed so it is isolated from heat and moisture.

Fixed Station Operation

In order to use this transceiver for fixed station operation, you will need a separate 13.8 V DC power supply that must be purchased separately.

The following table lists the current capacity recommended for power supplies used with each type of transceiver.

Tnmss8imMod«l	Power Supply Ca\|mc%
TM-261A	11 A or more
TM-261 EJ	4 A or more
TM-461A	10 A or more

1 Connect the DC power cable to the regulated DC power supply and check that polarities are correct (Red: positive, Black: negative).

•DO NOT directly connect the transceiver to an AC outlet!

•Use the supplied DC power cable to connect the transceiver to a regulated power supply,

•Do not substitute a cable with smaller gauge wires.

2Connect the transceiver’s DC power connector to the connector on the DC power cable.

•Press the connectors firmly together until the locking tab clicks.

Note:

For your trartsceiver to fully exhibit its performance capabilities, the following optional power supply is recommended:

PS-33 (20.5 A, 25% duty cycle).

Before connecting the DC power supply to the transceiver, be sure to svwtch the transceiver and the DC power supply OFF. Do not plug the DC power supply into an AC outlet until you make ail connections.

Replacing Fuses

If the fuse blows, determine the cause then correct the problem. After the problem is resolved, then replace the fuse. If newly installed fuses continue to blow, disconnect the power cable and contact your dealer or nearest Service Center for assistance.

	Rise Local^'efl	Rise Currsiif Rating

	TM-261A	15 A
	TM-261EJ	4 A

	TM-461A	10 A
	Supplied Accessory	20 A
	DC Power Cable	20 A
	DC Power Cable

CAUTION: Only use fuses of the specified type and rating.

Note: If you use the transceiver for a long period when the vehicle battery is not fully charged, or when the engine is OFF, the battery may become discharged, and will not have sufficient reserves to start the veNcle. Avoid using the transceiver under these conditions.

ANTENNA CONNECTION

Before operating, you must first install an efficient, well-tuned antenna. The success of your installation will depend largely on the type of antenna and its correct installation. The transceiver can give excellent results if the antenna system and its installation is given careful attention.

Your choice of antenna should have a 50 impedance to match the transceiver input impedance. Use low-loss coaxial feed line that also has a characteristic impedance of 50 Q. Coupling the antenna to the transceiver via feed

lines having an impedance other than 50 Q reduces the efficiency of the antenna system, and can cause interference to nearby broadcast television receivers, radio receivers, and other electronic equipment.

CAUTION:

♦Transmitting without first connecting an antenna or other matched toad may damage the transceiver. Always connect the antenna to the transceiver before transmitting.

♦Alt fixed stations should be equipped with a lightning arrester to reduce ti^e risk of fire, electric shock, and transceiver damage.

connector

ACCESSORY CONNECTIONS

■ External Speaker

If you plan to use an external speaker, choose a speaker with an impedance of 8 Q. The external speaker jack accepts a 3.5 mm diameter mono (2-conductor) plug. Recommended speakers include the SP-50B and SP-41.

To communicate in the voice modes, plug a 600 Q microphone equipped with an 8-pin modular connector into the modular socket on the Front Panel of the transceiver. Press firmly on the plug until the locking tab clicks.

GETTING ACQUAINTED

The following sections describe basic functions of the Front Panel controls and buttons, Rear Pane! jacks and connectors, microphone buttons and Display indicators. For full explanations of functions mentioned, refer to the appropriate sections elsewhere in the manual.

FRONT PANEL

The labels for some of the Front Panel buttons appear on the Display instead of on the panel or buttons. The displayed button labels change depending on which mode the transceiver is in. This “GETTING ACQUAINTED” section refers to the buttons that do not have labels on the Front Panel by the labels that appear on the Display immediately after switching ON the transceiver.

Selects the VFO mode {page 15}. The Tuning control changes the transceiver frequency in this mode. Also provides:

•Menu A or Menu B selection of choices (page 17}.

•VFO Scan start/stop to scan the entire VFO range {page 32}.

•Program Scan start/stop to scan a programmed range of frequencies (page 34}.

©MR button

Selects the Memory Recall mode {page 26}. The Tuning control changes the memory channel in this mode. Also provides:

•Memory Scan start/stop {page 32}.

Selects transmit/receive frequencies while in VFO mode and memory channels while in Memory Recall mode (pages 15, 26}. Also provides:

•Menu A or Menu B selection of function or choices (page 17].

•Program Scan limits select to choose the boundaries for this type of scan (page 34},

•Scan direction select to choose if Scan progresses upward or downward in frequency {pages 32, 35}.

•DTSS code select {page 37},

0 ®

® VOL control

Adjusts the level of receive audio from the speaker {page 14}.

(DMN button

Selects the Memory Name mode {page 30}.

CD POWER switch

Switches the transceiver ON or OFF {page 14}.

Adjusts the squelch threshold level {page 14}. This allows you to mute speaker output while no stations are being received.

® Microphone connector

Insert the 8-pin modular connector plug until the locking tab “clicks”.

UP-----------------------

DC 8 V, 200 mA max.

GND --------

STBY (PTT) ■

GND (MIC) ■

MIC ---------

RD : Open squelch audio (100 mV/10 ki2)

OWN----------------------------------------------

® MHz button

Selects the MHz mode. This mode allows you to use the Tuning control or the microphone [UP]/[DWN] buttons to

change the transceiver frequency in 1 MHz steps. Also provides:

• AM/FM mode select (some TM-261A versions only) {page 48}.

® F (Function) button

Allows you to select the different functions that are available on multifunction buttons.

Switches the Tone function ON or OFF {page 22}. When the optional TSU-8 is installed, also switches the CTCSS function ON or OFF. Also provides:

• Automatic Tone frequency ID activate/deactivate {page 36}.

® REV (Reverse) button

Switches the transmit frequency and receive frequency when operating with a transmit offset or a split memory channel {page 23}.

8 --- ----------------------------------------------------------------

REAR PANEL

© Antenna cable

Connect an external antenna {page 5}. When making test transmissions, connect a dummy load in place of the antenna. The antenna system or load should have an impedance of 50 £2. The connector accepts a male PL-259 connector.

© Power Input 13.8 V DC cable

Connect a 13.8 V DC power source. Use the supplied DC power cable (pages 3,4}.

© Speaker jack

If you wish, connect an optional external speaker for clearer audio. Accepts a 3.5 mm diameter, 2-conductor plug.

MICROPHONE

MC-53DM

(DUP button

(D DWN button

Raises or lowers the VFO frequency, the memory channel number, the Tone/CTCSS frequency, or the DTSS code. Holding either button down causes the action to be repeated. Also, switches between values when selecting values for functions with multiple choices.

(3) PTT (Push-to-talk) switch

Press to transmit; release to receive. Also used to exit various functions such as Scan, DTSS code select, or Tone/CTCSS frequency select.

® LOCK switch

Locks all microphone functions except [PTT] and the DTMF keypad, if equipped.

CDCALL key

Recalls the Call channel. Pressing for more than 1 second initiates the Call/VFO Scan {page 35} or the Call/Memory Scan {page 35}.

® VFO key 0 MR key

Identical to the Front Panel functions of the same names. Both keys can be re-programmed, if desired {page 47}.

CDPF key

Depending on which function you select by accessing “PF” in Menu B (page 48}, the function of this key differs. Refer to “CONFIGURING PROGRAM FUNCTION KEYS"

{page 47}.

® DTMF keypad (MC-53DM only)

The 16-key keypad is used with the DTMF functions, or to directly enter a freqeuncy or a memory channel number.

DISPLAY

Ф	(3)	(4)	®	®	®
wO	R CT DT CO MENU j
*					S \ ДРД
						LM
	- 1 ----3 -------	5	7------9-------	OVER	ON AIR
	- 1 ----3 -------	5	7------9-------	OVER

Indicates the Transceiver Lock function is ON {page 46}.

® - +

Indicates the transmit frequency is offset (different) from the receive frequency {page 22}. The symbol displayed (either

“ + ” or “ - ”) indicates the direction that the transmit frequency is offset from the receive frequency. +” appears when a split-frequency memory channel is selected {page 25}.

® R

Indicates the Reverse function is ON {page 23}. Transmit and receive frequencies are reversed. If any frequency is selected for ‘TONE.RX” in Menu B, RX Tone frequency and TX Tone frequency also are reversed. Refer to “Selecting a Tone Frequency” {page 23}.

® CT

‘T' indicates the subaudible Tone encoder function is ON {page 22}. “CT’ indicates the CTCSS function is ON {page 36} provided the optional TSU-8 CTCSS unit is installed {page 54}.

(DDT

Indicates the Dual Tone Squelch System (DTSS) is ON {page 37}.

® CO

Indicates Carrier-Operated Scan Resume is ON {page 31}. When not visible, Time-Operated Scan Resume is in effect.

(7) MENU

Visible while accessing Menu A or Menu B {page 17}.

® S.Mli.i.ts

Displays the transmit/receive frequency, frequency step {page 45}, Offset frequency {page 21} and other data. Also displays the menu selections when using Menu Set-Up. The 1 MHz decimal point blinks while the transceiver is scanning {pages 32, 35}.

® gg

Displays the currently selected memory channel number {page 26}. The first digit displays “A” or “B” depending on which Menu is being accessed.

This icon indicates the selected memory channel is locked-out and will not be scanned by Memory Scan {page 33).

Indicates AM receive mode is ON {page 48). AM mode is available only on some TM-261A versions only.

® TOT

Indicates the Time-out Timer function is ON {page 46). Blinks while accessing Menu B, ‘ТОГ’.

® APO

Indicates the Automatic Power Off function is ON {page 46}.

® LM

Indicates whether Low (L) or Medium (M) transmit output power is selected {page 16}. When neither “L” nor “M" is visible, High output power is selected.

® B

Appears when the [F] button is pressed. Indicates alternate functions of multiple-function buttons can be accessed now.

BUSY

Indicates the squelch is open and the frequency is “busy”. Also appears when the squelch is set to minimum by turning the SQL control fully counterclockwise. If using either CTCSS or DTSS, indicates the squelch is open due to a received signal that contains the same CTCSS tone or DTSS code that is programmed in your transceiver.

OVER

In Receive, acts as an S-meter to indicate the signal strength of received signals. In Transmit, acts as an RF power meter to indicate the relative transmit output power {page 16}. Full scale represents High transmit power.

ON AIR

indicates the transceiver is in Transmit mode with a transmit frequency selected that is within a transmit band.

BUTTON FUNCTION DISPLAY

TM-261 KENWOOD

Some of the Front Panel buttons have more than one function. This allows us to provide many functions on your transceiver but keep the transceiver case small. To simplify operation, the lower portion of the Display has labels that indicate the current function of each of the 4 buttons on the lower edge of the Front Panel. The label appears immediately above its corresponding button.

When using any of the alternate functions of the multiple function buttons, you have 10 seconds to select an alternate function after pressing the [F] button. Pressing [F] again or waiting for 10 seconds restores the Basic state with button definitions of [MHz], [F], [TONE], and [REV].

Basic State Display Labels

MHz	TONE REV J

—and

Labels After Pressing [F]

LOCK

■ OFF

DTSS SHIFT

SWITCHING POWER ON/OFF

1Switch ON the DC power supply.

• If operating mobile, skip this step.

2 Press the POWER switch to switch ON the transceiver.

To switch OFF the transceiver, press the POWER switch again.

* In a fixed installation, after the transceiver has been

switched ON, it can then be switched OFF or ON by using only the power switch on the DC power supply.

ADJUSTING VOLUME

Turn the VOL control clockwise to increase the audio level and counterclockwise to decrease the level.

ADJUSTING SQUELCH

The purpose of squelch is to silence audio output from the speaker when no signals are present. When squelch is set correctly, you will hear sound only while a station is actually being received. The point at which ambient noise on a frequency just disappears, called the squelch threshold, depends on the frequency.

Turn the SQL control clockwise to just eliminate the background noise when no signal is present.

+ 44 hidden pages