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ooMM 144MHz FM TRANSCEIVER

7\ TM-241 A/241 E

m430/440MHz FM TRANSCEIVER TM-441A/441E

1200MHz FM TRANSCEIVER

TM-541 A/541 E

INSTRUCTION MANUAL

KENWOOD CORPORATION

©B62-0031-30

12 11 10 09 08 07 06 05 04 03

Thank you for purchasing this new transceiver. IMPORTANT:

NOTE:

Please read this instruction manual carefully before placing your transceiver in service.

SAVE THIS INSTRUCTION MANUAL 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.

This instruction Manual covers the following models.

TM-241A: TM-241E: TM-441A: TM-441A: TM-441E: TM-541A: TM-541E:

144MHz FM TRANSCEIVER (U.S.A. and general markets)
144MHz FM TRANSCEIVER (U.K. and European markets)
440MHz FM TRANSCEIVER (U.S.A. only)

430MHz FM TRANSCEIVER (General markets)
430MHz FM TRANSCEIVER (U.K. and European markets)
1200MHz FM TRANSCEIVER (U.S.A. only)

1200MHz FM TRANSCEIVER (European markets)

If disregarded, inconvenience only, no risk of equipment damage or personal injury.

CAUTION:

Equipment damage may occur, but not personal injury.

I 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

1. BEFORE OPERATION

2. SPECIFICATIONS 6

3. ACCESSORIES 7

4. INSTALLATION INSTRUCTIONS 7

5. OPERATION

CONTROL FUNCTIONS 10

RECEIVER OPERATION

Reception 16

Frequency Selection 17

Frequency Step Selection 17

Programmable VFO Tuning Limits 18

ALT(TM-541 A/E only) 19

TRANSMITTER OPERATION 20

Time-out Timer (TOT) 20

MEMORY

Microprocessor Memory back-up 21

Initial State 21

Microprocessor Initialization 21

Memory Channel 21

Memory Contents 22

Memory Entry 22

Memory Channel Recall 24

Memory Shift 24

SCAN

Scan Operation 25

Hold/Resume Programming 25

Band Scan 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

Tone Operation 29

Tone Frequency Selection 29

Autopatch (U.S.A. version only) 30

TONE / CTCSS OPERATION 30

DTSS (Dual Tone Squelch System)

OPERATION 31

DRS (Digital Recording System)

OPERATION 34

PAGING 41

TONE ALERT SYSTEM 47

APO (Automatic Power Off) 48

DIM(Dimmer) 48

BEEP 49

LOCK/A.LOCK 49

6. BLOCK DIAGRAM and SCHEMATIC DIAGRAM

Another sheet

7. MAINTENANCE 50

IN CASE OF DIFFICULTY 51

8. OPTIONAL ACCESSORIES 52

AWARNING 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.

ff ~t^>

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

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

2 SPECIFICATIONS

TM-241A(USA/Canada) TM-241/

\/E TM-441A|U.SA/Canaoa)

TM-441A

, TM-441E

TM-541A/E

d> CD

| Frequency range MHz

144 to 148 144 to 1-

46 1 438 to 450

430 to 440

1240 to 1300

Mode

F3E(FM)

Antenna impedance

500

Operating temperature

-200Cto+60°C (-4Tto + 14OT)

Power requirements

13.SV DC ±15%(11.7^15£V)

Ground

Negative

Current drain

Transmit mode

Less than 11A

Less than 10A

Less than 6A

Receiver mode

Less than 0.6A

Frequency stability

Less than ±10ppm

Less than ±3pprn

Dimensions (WXHXD) (mm) (Projections included)

140X40Xl60(5-l/2llXl-37/64"X6-19/64") (14QX4QX172(5-l/2nXl-37/64"X6-25/32")

Weight

(kg)

1.2(2.65lbs)

-t-f -I-f

c/i

TO K

Output power 2

SOW

35W

10W

MID

Approx 10W

LOW

Approx. 5W

Modulation

Reactance modulation

Spurious radiation

Less than

-60dB

Maximum frequency deviation

±5KHz

Audio distortion (at

60% modulation)

Less than 3% (300 to 3000 Hz)

Microphone impedance

60QQ

*o5

% tr

Circuity

Double conversion superheterodyne

Intermediate frequency lst/2nd

3Q.825MHz;455kHz 10.7MHz/4£

>5kHz 30,825MHz/ 455kHz

597MHz/455kHz

Sensitivity (12 dBSINAD)

Less than 0.25/*V

Less than

0.16 ^V

Selectivity

-6dB:

More than 12 kHz

-60dB Less

than 24 kHz

Squelch sensitivity

Less than 0.1/^V

Less than 0.177 ^V

Less than 0,1//V

Output (5% distortion)

More than 2 W across 8 Q loads

External speaker impedance

1 Australia: 144 to 148

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 in 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.

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.

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 2. Attach the transceiver loosely using the 4 SEMS

Dynamic Microphone screws

(GENERAL market only) T91-0379-X5 1 ea. 3. Align 'the grooves in the bracket with the

Dynamic Microphone transceiver's screws ( Fig. A) and slide the transceiver

(EUROPE market only) T91-0382-X5 1 ea. A *°the/elr' . . . . .. . . , , ,k

Microphone Hook 4- Adjust the viewing angie in the bracket to the

(U.S.A. CANADA only) J20-0319-24 lea. desired position ( Fig. B).

Mobile Mounting Kit 5. Hold the transceiver in place and tighten the 4 SEMS

Bracket J29-0436-03 1 ea. screws using the supplied wrench.

Screw set N99-0331-05 1 ea.

Self tapping Screw

(U.S.A. CANADA only) ... N46-3010-46 2 ea.

Hexwrench W01-0414-04 1 ea.

Stacking plate I I o-/--oo--. ,- -,

(TM-441A/441E/541A/541E).. J21-4147-14 2 ea. L & IB

DC power Cable E30-2111-05 1 ea. f (7=^ V V"" "4 ^

Fuse (TM-241A/241E: 15A).. F05-1531-05 1 ea. C-J)1 ' J-\3 (f^> """"--->

(TM-441 A/441 E: 10A).. F05-1031-05 1 ea. ,/"[] " /' ^ ^^^^^1^-^ /

(TM-541A/541E: 8A) ... F05-8021-05 1 ea. el I-^M^ "(<%^O'

Instruction Manual B62-0031-XX 1 copy C_ _J \}> ]\ ^^

Warranty Card 1 ea.

(U.S.A. .CANADA, EUROPE markets only) Fi9-A R9-B

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4-2 CONNECTION
4-2-1 Mobile Installations

Cautions :

1. Before installing the power cable, be sure to

i remove the negative lead from the battery for

j safety.

|2. After installation and wiring, be sure to double check for correct installation before reconnecting the negative lead to the battery terminal. j

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 { + I and negative { -) lead polarity is correct when connecting to the battery.

Engine compartment--jj--- Passenger compartment

Red ^se nn

* ^ f

f-^

I Black

I * ^--*

\ To the \ transceiver

AT^n G

?*, '

+ - ] Select a location where j P

the power cable is pro- ; F

oX^- }

^\ Make sure the cable does not directly contact the edge of the note by using ] a grommet.

ocio f\r k .-J

, ig^igu MUI" r 1*101, IHU19- ' |^

Battery ! ture or abrasion when t

.securing the cable.

\*rl I a

fire

: o If the wiring hole in the fire wall sembie the fuse holder to threat

O4I4 ^1 o

wall

or chassis is too small, disasJ the wire through the hole.

From passenger compartment

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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).

8

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.

1. Never connect the AC power cable to the AC outlet until all 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 VDCT 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 firerelectric shock,personal injury,or damage to the radio itself.

5 OPERATION

5-1-1 CONTROL FUNCTIONS

® <D d)

A.LDCK - - REV AL CTCSS ^

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AL T, ALT STEP

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CD POWER switch

Press to turn the transceiver on or off.

Press the VFO/M^V 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.

(2)Tuning control

This control is used to select the desired transmitter/receiver frequency, MHz step, memory channel, frequency step, tone frequency, scan direction, etc.

<D 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.

(5)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 flashing will turn the time-out timer function on and off. (D Microphone connector

Attach the supplied microphone to this connector. The pin out of the connector is shown in the accompanying illustration.

(a) GND

CD MIC

(Microphone Audio)

®PTT^ (Push to Talk)

(7) GNO {Microphone audio)

(6) RX Audio Output

(Appro* 100 mV/10 k ohm)

" 9 VOC (Max 1 50 mA)

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(T)VFO/M^Vkey

This key is used to return to VFO operation after operating in the MR or CALL channel mode. Pressing this key will allow the tuning control and microphone UP/DWN keys to increase or decrease the operating frequency.

Press and hold the key for longer than 1 second to initiate VFO scan. Pressing the key after scan has been initiated will cause scan to stop.

Pressing the key within 10 seconds of pressing the F key will copy the memory channel or call channel data to the VFO. This allows you to change parameters of tHat channel without actually changing the data that has been stored in memory.

Pressing the F key for longer than 1 second and then pressing the VFO key will cause radio to toggle the hold/resume mode between Time Operated scan and Carrier Operated scan.

If you press and hold the VFO key while you turn on the POWER switch you will reset the microprocessor's VFO memory, without destroying the memory channel or call channel data.

(DMR/Mkey

This key is used to select MR (Memory Recall) mode from the VFO mode. The tuning control can then be used to select the desired Memory channel.

Pressing the key for longer than 1 second will initiate memory channel scanning.

Pressing the key within 10 seconds of pressing the F key will store the displayed data into memory. In the MR channel mode pressing the F key for longer than 1 second and then pressing the MR key will cause the Memory channel to skip during Memory channel scan mode.

If you hold and press this key while you turn on the POWER switch you will clear all the microprocessor's operator programmed memory section.

(DMHz/LOCK key

This key is used to tell the microprocessor that you wish to increase or decrease the operating frequency in 1 MHz increments.

Pressing this key within 10 seconds of pressing the F key will cause the key lock function to activate, protecting the currently displayed data from accidental erasure.

Pressing the F key for longer than 1 second and then pressing MHz/LOCK key while the F indicator is flashing will turn the AUTOMATIC POWER OFF function on or off.(See page 48)

11

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® © ©

®CALL key

Press this key to activate the call channel functionPress the F key momentarily and then press the CALL key to store the currently displayed data into the CALL channel. The radio will allow you up to 10 seconds to press the CALL key after pressing the F key.

Pressing the F key for longer than 1 second and then pressing the CALL key will store the currently displayed data as the lower limit for the programmable VFO tuning limit function.

<D SHI FT/AL key

SHIFT function

Pressing this key alone to select the desired transmitter offset direction. Pressing the key will cause the radio to^shift from one offset direction to the next, i.e. " + " to " -" to simplex where no indicator shows, (" - "to" - -" for European versions)

AL function

Pressing the F key momentarily and then pressing the SHIFT/AL key will cause the radio to activate the Priority Alert function. When this function is active the radio will scan memory channel 1 at approximately a 5 second interval. If there is activity on the

frequency a beep will sound from the speaker. Pressing the same key sequence again will cancel the function.

Pressing the F key for longer than 1 second and then pressing the SHIFT/AL key will store the currently displayed data as the upper limit for the programmable VFO tuning limit function.

©TONE/T.ALT key

TONE function

Pressing this key by itself causes the radio to select the desired tone signaling mode. When the (TT indicator is illuminated in the display the transceiver will transmit the selected subaudible tone. When the "CTCSS" indicator is illuminated the transceiver will both transmit the subaudible tone and will also remain squelched until the proper subaudible tone is received.

TONE frequency selection

Pressing the F key for longer than 1 second and then pressing the TONE/T.ALT key will allow you to select the desired tone frequency. To change to a different tone frequency rotate the tuning control or press the UP/DWN switches on the microphone until the desired tone frequency appears in the display. To return to the normal frequency display you can press any front panel key except the power switch.

TONE ALERT function

If you press the F key momentarily and then press the TONE / T.ALT key, T.ALT function will be activated. This function will cause the radio to emit a series of beeps when an incoming signal is received. (See page 47)

12

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5-1-2 LCD Display Panel

CZ) <D (2) REV/STEP key

This key is used to reverse the transmit/receive frequencies during repeater operation. If you have selected simplex this key will not function! Pressing the F key momentarily and then the REV/STEP key will allow you to select the desired VFO tuning step and Scan step size. Use the tuning control to select the desired tuning step and then press any front panel key except the POWER switch to return to the normal frequency display. Pressing the F key for longer than 1 second and then pressing the REV /STEP key will turn the BEEP function Off or ON.

(D DR/DT/ALT key(ALT: TM-541A/541E only)

DR/DT function

Pressing this key atone to select the DTSS(Dual Tone Squelch System) function or DRS (Digital Recording System ) function.

ALT function

Pressing the F key momentarily and then the DR/DT/ALT key will cause the ALT(Automatic Lock Tuning) function of the TM-541 A/541 E to activate. Pressing the F key for longer than 1 second and then pressing the DT/DR/ALT key will turn the DRS function ON or OFF.

<D LOCK

A.LOCK

v^-/

DTSS DRS

APO

(2) iM"f""Mili

(D LOW MID

HJK3I3

_ <z> ®

On when the Lock function has been activated.

On when the All Lock function has been activated.

On when the Automatic Lock Tuning function is active. When the ALT system is operating the direction indicator will turn on if the system shifts the receiver frequency. On when the DTSS function has been activated.

On when the Digital Recording System is active.

On when the Automatic Power Off function has been activated. On when the squelch opens. This level meter indicates the relative receiver signal strength or the relative transmitter power output. Indicates the relative output power setting for transmit. No indicator for high power.

On when the Time Out Timer function has been activated. On during transmit.

13

© F /

,<n

® * O O Indicates the active memory channel

^ *" number. * indicates that the chan-

nel is locked out.

C is displayed during call channel. Either PO, PI, P2, P3, or PA is displayed during paging.

@ F / Qn whenever the F key has been de-

pressed. Also shows the last memory channel number that had been se-

_ /-A lected.

!-^ ^^i On when the Tone Alert function is

active. The indicator flashes when signal has been received.

® CTCSS On when the Tone Decode and En-

| code function has been activated.

I On when the Tone Encode function

has been activated.

©AL On when the Priority Alert function

has been activated.

® REV On when the Reverse function has

been activated.

@ - + Display the selected transmitter off-

set direction.

Both - and + light at the same time during split channel operation.

® iSsB.BB8s Dj5p'ays the operating frequency to i the nearest kHz digit; or the tone

I ' frequency etc.

I The indicator flashes when scanning.

5-1-3 Rear Panel

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.Line

CD ANTENNA connector

Attach an antenna with a low SWR and an

impedance of 50 ohms. (D 13.8 VDC power input connector

Connect the supplied DC power cable to this

connector.

Pay close attention to the polarity. Red is positive and

black is negative. (3) Fuse holder

Contains a requaired fuse.

TM-241A: 15A, TM-441A: IDA, TM-541A: 8A

Do not use a larger fuse as damage might result to

the transceiver. @ External speaker jack

This jack is used to connect an external speaker. The

speaker should have an impedance of 8 ohms.

14

5-1-4 Microphone

@ (v

i" 15 <^

;® ®®'"®'® ®® ®@

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^^^ U.S.A.

European version version

©(DUP/DOWN switches

These switches can be used to increase or decrease the VFO frequency, the Memory channel number, and the Tone frequency, etc..

(D PTT (Push to Talk) switch

The transceiver will transmit whenever this switch is depressed. Scan operations may be canceled by pressing this switch without transmitting.

©CALL key (except European version)

This key functions just like the CALL key on the front

of the radio.

1750 key (European version)

The transceiver will transmit with 1750 Hz repeater

access tone whenever this switch is depressed.

©VFO key

This key functions just like the VFO key on the front of the radio.

©MR key

This key functions just like the MR key on the front of the radio.

) PF (Programmable Function) key This key can be programmed to perform any of the following functions:

MHz key (Initial setting from the factory); or SHIFTkey; or TONE key; or REV key;or DR/DT key ; or LOW key. To program the key use the following procedure:

1. Turn the POWER switch on the transceiver OFF,

2. Press and hold the key on the front panel of the set that corresponds with the function you wish to program the microphone key to perform.

3. Turn on the POWER switch while the key on the front panel is held in.

4. Release the front panel key.

One additional function can be programmed that is not included on the front panel of the transceiver. This is known as the MONITOR function. This will allow you to open squelch to check the band for a clear frequency. This will function even if you are operating in the CTCSS decode mode or DTSS mode or PAGING mode.

MONITOR programming

Press and hold the F key on the front panel as you turn on the POWER switch of the transceiver and then release the F key.

>16-Tone DTMF keypad (U.S.A. and CANADA version only)

These buttons are used to activate the DTMF encoder.

) LOCK key

This key will deactivate all functions of the microphone except the PTT function and DTMF key pad.

15

5-2 RECEIVER OPERATIONS

Audio confirmation is provided whenever a front panel key is depressed. You can disable this function by pressing the F key for longer than 1 second and then pressing the REV/STEP key.

5-2-1 Receptoin

1. Connect the power supply, antenna, and microphone and then adjust the controls as follows:

Power Switch OFF

Vol Control Full Counterclockwise

Power switch of power supply

(Fixed station) OFF

SQL Control Full Counterclockwise

2. Turn on the Power Supply and then turn on the transceivers POWER switch. The display should indicate a frequency. Fig.l shows examples of frequencies that will appear on the various models. In addition to the frequency you may see one or

more control indicators illuminats on the display,

TM-441A TM-241 A/241 E "(U.S.A. version) TM-541 A/541 E

H^DOD

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1 ^ u.u u u

1UU

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TM441A/TM-441E

Note

The frequencies shown above are the default

frequencies after a microprocessor reset. If the

display shows incomplete data or you think the

; displayed frequency is in error you should reset the

j Microprocessor. Memory Initialization on page 21.

m_j

3. Rotate the VOL control clockwise until a signal or noise is heard coming from the speaker.

4. Rotate the tuning control or press the microphone UP/DWN switches to select an open channel. Then rotate the SQL control clockwise until the noise just disappears and the BUSY indicator turns off. This point is known as the Squelch Threshold point. The squelch control must be adjusted to this setting for the Scan functions to operate properly.

5. Select the desired operating frequency using the microphone or tuning control. When a signal is received the S-meter will deflect and the BUSY indicator will turn ON,

Caution

Turn off the transceivers POWER switch before you start or stop your vehicles engine, or your home power supply.

Fig. 1

16

5-2-2 Frequency Selection

You can change the dial frequency while in the VFO mode. The frequency can then also be stored in memory, or in the call channel using the techniques that will be described in this manual.

MR key

VFO mode

VFO key

CALL key

MEMORY channel mode C

CALL key \ X

,.!3 CALL channel mode

MR key

o VFO Mode Operation Frequency Selection

1. Press the VFO/M ^ V key to select the VFO mode.

2. Rotate the tuning control or press the microphone UP/DWN switches to select the desired frequency.

o Memory Channel Selection

1. Press the MR/M key.

2. Rotate the tuning control or press the microphone UP/DWN switches to select the desired memory channel.

o CALL Channel Selection

Press the CALL key to select the Call channel.

5-2-3 Frequency Step Selection

The frequency step is indicated in the chart below. STEP

±10+

:±15<:

±20+±

12.5+

±25

TM-241A/E

TM-441A/E

TM-541A/E

To select the desired tuning or scan step size use the

following procedure:

L Press the VFO/M ^ V key to select the VFO mode.

2. Press the F key momentarily. The F indicator should light in the display.

3. Press the REV/STEP key within 10 seconds of pressing the F key. The current frequency step size will be displayed.

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era

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17

4. Rotate the tuning control or press the UP/DWN switches on the microphone until the desired tuning step size appears in the display,

5. To complete the programming of the step size you can press any key on the front panel except the POWER key, or simply wait 10 seconds and the microprocessor will automatically return to the normal frequency display.

The chart below shows how the microprocessor will correct a new step size.

5,10,15,20 to 12.5,25 12.5,25 to 5,10,15,20

12.5,25 to 5,10,15,20

0,5.10,15

20,25,30,35

i 25

40T45,50,55

60,65,70,75,
80,85,90,95

i 0

I 0

12.5

37.5

62.5

87.5

5-2-4 Programmable VFO Tuning Limits

The TM-241/441/541 series radios provide the capability of programming the VFO tuning range, in 1 MHz band segments, as well a providing a separate programmable band scan function(See page 26). For example you could tell the transceiver that you only wish to tune the 144 MHz and 145 MHz band segments. The tuning controls and microphone UP/DWN switches would then only tune within these specific frequency limits. The procedure for specifying these limits is described below.

1. Press the VFO/M^V key to select the VFO mode.

2. Rotate the tuning control or press the microphone UP/DWN switches until the desired tower tuning range appears in the frequency display.

For example with the TM-241 you might want to select the 144 MHz band, and dial up 144,100 MHz.

3. Press the F key for longer than 1 second. The F indicator should begin flashing.

4. Press the CALL key within 10 seconds, A long beep will sound and the F indicator will turn off in the display. This indicates that the lower limit has been successfully stored in memory.

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Press the key for longer than
1 second,

18

5. Now select the desired upper tuning limit using the MHz key and tuning control, or microphone UP/DWN switches.

With our example TM-241 we want the upper band limit to be in the 145 MHz band, and therefore dial up 145.100MHz.

6. Press the F key for longer than 1 second. The F indicator will again begin flashing.

7. Press the SHIFT/AL key within 10 seconds. A long beep will sound and the F indicator will turn off in the display. This indicates that the upper limit has been stored in memory.

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Press the key for longer than
1 second.

8. To confirm that the programming was properly performed rotate the tuning control or press the UP/DWN switches. The transceiver should not go above or below the programmed band limits,

9. To clear both programmed limits simultaneously you should initialize the VFO memory using the procedures discussed on page 21. You can reprogram either limit independently by following the appropriate instructions above.

5-2-5 ALT (TM-541A/541E only)

The ALT system operates similar to an AFC (Automatic Frequency Control) system. This system is useful when the frequency of either station starts to drift. When this occurs distortion of the signal is the usual result. The ALT system will detect the drift and shift the frequency to compensate. To activate the ALT function

1. Press the F key momentarily. The F indicator will turn on in the display.

2. While the F indicator is on press the DR/DT/ALT key. The ALT indicator will turn on and the receiver will automatically center itself on the incoming signal.

ALT

Turns on when the transmit

frequency of the distant station is lower than your receive frequency.

Turns on when the transmit frequency of the distant station is higher than your

receive frequency.

Note:

The frequency display will not actually change, even though the receive frequency might shift in order to properly tune the incoming signal. When the ALT system is operating the Direction indicator in the display will turn on to signal a change in the receiver frequency. The direction indicator will show you if the incoming signal was higher or lower than the displayed frequency.

3. To release the ALT function press the F key momentarily and then the DR/DT/ALT key.

19

5-3 TRANSMITTER OPERATION

Caution

1. Ensure that an antenna with a fow standing wave ratio (SWR) is attached to the antenna connector before attempting to transmit. Failure to provide proper termination may result in damage to the final amplifier section.

2. Always check to ensure the frequency is clear before transmitting.

Note

The use of LOW power is recommended whenever

possible, to avoid interfering with other stations.

5-3-1 Transmit Basics

1. Select the desired operating frequency using any of the methods previously discussed.

2. Press the LOW/DIM key to select the desired transmit output.

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3, Check the frequency to see if it is occupied before you transmit.

4, Press the PTT switch, The ON AIR indicator will light, and the RF meter will deflect to the right.

If you have selected the LOW power position, the low indicator will appear in the display and the RF meter will only deflect slightly. When HI power has been selected the RF meter will deflect full scale.

5, Speak into the microphone. The recommended distance to the microphone is 5 cm (2 inches).

5-3-2 Time-out Timer (TOT)

The TOT can limit the continuous transmission time to

30 minutes.

1. Press the F key for longer than 1 second, then press

the LOW/DIM key. The T indicator will light. To cancel

the setting, repeat the operation.

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T-Press the key for longer than
1 second.

2. When the time-out timer reaches the transmission time limit, a beep will sound and the transceiver will return to the receive mode. To transmit again, release the PTT switch and press it again.

20

5-4 MEMORY

5-4-1 Microprocessor Memory Back-up This transceiver contains a lithium battery to retain memory. Turning off the POWER switch, disconnecting the power cable, or a power failure will not erase the memory.The battery should last for approximately five years. When the battery discharges, an erroneous display may appear in the display. Lithium battery replacement should be performed by an authorized KENWOOD service facility; either your authorized KENWOOD dealer or authorized service center.

5-4-2 Initial State

Initial state of the microprocessor from the factory is

shown in the chart below.

TM-241A/E

TM-441A/E

TM-541A/E

VFO, Memory |

channel 1, CALL channel frequency

144.000 MHz

440.000/
430.000 MHz

1240.000

| MHz

VFO step

5/12.5kHz

25kHz

Memory channel

' 1CH

1CH |

I 1CH

I Tone frequency

88-SHz

88.5Hz

5-4-3 Microprocessor Initialization

o Memory channel Initialization

When you want to erase all programed data, or if the display shows erroneous information, you should initialize (reset) the microprocessor using the following procedure.

1. Turn the POWER switch off.

2. Press and hold the MR/M key and turn on the POWER switch.

3. Release the MR/M key .

o VFO initialization

All the settings, except the contents of the memory and call channels, are initialized.

1. Turn the power switch off.

2. Press and Hold the

VFO/M^V key then turn fA.LOCK :VREV , AL CTCSS ^

I A LOCK - - ftEV f

AL CTCSS

ST Cffr.PV /

t&jpmmmmmmmmmmmm

538

the power switch on. g^ t

No transmit/receive op- ^^ eration occurs when this v_^z is done.
3. Press the VFO/M^V key again,

5-4-4 Memory Channel This transceiver provides 20 Memory Channels. (18 Memory Channels when DRU-1 installed) In addition to serving as a normal Memory Channel some of the Memory Channels serve a dual purpose to specify other parameters. The functions of those Memory Channels are described below. O Memory Channel 1 is used to store the frequency for

the Priority Alert function. O Memory Channel 7 ~10 are used to store odd split

repeater data, O Memory Channel 11 is used to store the lower limit

for the Programmable Band Scan function. O Memory Channel 12 is used to store the upper limit

for the Programmable Band Scan function

21

5-4-5 Memory Contents

Each Memory channel is capable of storing the following information. (YES :Can be stored in memory^ NO : Cannot be stored in memory)

When the DRS unit is not installed and the DTMF unit is installed.

CH1~3

CH4~6 |

| CH7~10

CHI 1-20 !

Freq.(SfMPLEX)

YES

I YES

YES

YES ,

freq.(odd split)

YES

Tone freq.

Tone/CTCSS ON/OFF

YES

! YES

VFO freq. step

YES

Shift. REV ON/OFF

YES i

! YES

YES

DTSS cord, DTSS ON/OFF

YES

When the DRS unit is installed and the DTMF unit is not installed.

CH1~3

CH4-6

CH7~10

CH11-18

Freq.(SIMPLEX)

YES

freq.(odd split)

YES

Tone freq. Tone/CTCSS ON/OFF

YES

VFO freq. step

YES |

YES

Shift. REV ON/OFF

YES

rYES

DTSS cord, DTSS ON/OFF

YES

5-4-6 Memory Entry

oSimplex/Normal shift

1. Press the VFO/M^V key to select the VFO mode.

2. Select the desired operating frequency .offset/tone frequency,etc.( For example 145,500MHz)

3. Press the F key. The F indicator and a memory channel indicator will light( For example CH 8)

4. Select the desired Memory Channel using the Tuning control or microphone UP/DWN switches.

(For example CH 5 )

5. Press the MR/M key within
10 seconds of selecting the

Memory Channel. A long beep will

sound

and the F indicator and the Memory Channel number will turn OFF, and the transceiver will return to the VFO mode.

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22

'Odd.Split Channels Press the VFO/M^V key to select the VFO mode. Select the desired receiving frequency ,tone frequency,etc. (For example
145.600MHz)

3. Press the F key.The F indicator and a memory channel indicator will light.( For example CH 5)

4. Select any Memory Channel from 7 thru 10 using the Tuning control or the microphone UP / OWN switches.

(For example CH 10)

5- Press the MR/M key within
10 seconds of selecting the Memory Channel. A long beep will sound and the F indicator and the Memory Channel number will turn OFF.

6. Within 10 seconds of pressing the MR/M key, you should select the desired

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transmit frequency using the Tuning control or microphone UP/DWN switches. (For example
145700MHz)

7. Press the MR/M key within
10 seconds of selecting the transmit frequency. A long beep will sound to signal the data has been successfully stored.

8. To confirm the contents of the Split Memory Channel press the MR/M key and recall the channel. The receiving frequency and -h indicator will appear in the display,

9. To check the transmit frequency press the REV/STEP key or Microphone PTT switch. The transmitting frequency will appear in the display.

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23

o CALL Channel

1. Press the VFO/M^V key to select the VFO mode.

2. Select the desired operating frequency ,offset,tone frequency,etc.( For example 145.500MHz).

3. Press the F key. The F indicator and the memory channel indicator will light.( For example CH 8)

4T Press the CALL key within
10 seconds of pressing the F key. The F indicator and the Memory Channel number will turn QFF,to confirm data entry.

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5-4-8 Memory Shift

This feature copies Memory Channel or Call channel data to the VFO.

This will allow you to recall and alter these frequencies without changing the actual contents of the memory or CALL channel.

1. Press the MR/M key or CALL key to select the MR mode or CALL channel mode.

2. Press the F key. The F indicator will light.

3. Press the VFO/M ^ V key within 10 seconds of pressing the F key. The F indicator and the Memory or CALL Channel indicator will turn OFF to signal the data has been successfully transferred to the VFO.

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5-4-7 Memory Channel Recall

1. Press the MR/M key.

2. Rotate the tuning control or press the microphone UP / OWN switches to select the desired memory channel.

NOTE

If an Odd Split Memory channel is selected, only the

receive data will be copied.

24

5-5 SCAN

When the scan function is turned on, turn the tone alert function off. If the tone alert function is on, scan will not activate.

5-5-1 Scan Operation

The following scan options are available:

1. Band scan

Scan proceeds over the entire band( This function operates in the VFO mode only.)-

2. Programmable band scan

The scan frequency range is determined by the frequencies stored in Memory Channels 11 and 12 ( This function operates in the VFO mode only.).

3. Memory channel scan

Scan proceeds thru those memory channels that actually have data entered and have not been locked out (This function operates in the Memory Channel mode only.).

5-5-2 Hold/Resume Programming

The transceiver will stop on a busy channel.

Two type of scan hold / resume have been provided in

this transceiver.

oTime operated scan

Scan will resume approximately 5 seconds after stop even if the station is still present.

oCarrier operated scan

Scan will hold as long as the signal is present, and will resume scan 2 seconds after the signal drop out.

! Note

| When CTCSS is on, scanning stops only at the stations

I for which the CTCSS signal matches. When DTSS is

on, the scanning stops and audio signals are received

only when the DTSS code matches.

This transceiver is delivered from the factory in the Time operated scan mode. To switch between the two modes use the following procedure.

L Press the F key for longer than 1 second. The F indicator will flash.

2. Within 10 seconds of pressing the F key press the VFO/M^V key. This will toggle the Scan / Resume mode to Carrier operated mode.

3. To return to Time operated mode repeat steps 1 and
2.

25

5-5-3 Band Scan

1, Press the VFO/M^V key to select the VFO mode.

2, Adjust the SQL control to the threshold point.

3, Press and hold the VFO M^V key for longer than 1 second.

The MHz indicator will flash as a visual reminder the transceiver is scanning.

-Press and hold the VFO / M^V key for longer than 1 second.

^- Flashing

4. Scan will begin in an upward direction.You can reverse the direction by rotating the Tuning control counterclockwise, or by pressing the microphone OWN switch. The scan step size depends upon the current step programming.

5. Scan will stop whenever a signal is received (that activates the BUSY indicator) for a limited time.

6. Press the PTT switch or any front panel key to stop scan.

5-5-4 Programmable Band Scan

1. The lower scan limit must be stored in memory channel 11 . The higher scan limit must be stored in memory channel 12. ___^_^____

Notes

If the frequency in Memory Channel 11 is equal to or

greater than the frequency stored in Memory channel

12 scan will proceed over the entire band"Band

Scan",

2,
3.

Adjust the SQL control to the threshold point. Press the VFO/ M^V key to select the VFO mode. Select a VFO frequency between the two programmed scan limits.

Press and hold the VFO/ M^V key for longer than 1 second. The MHz indicator will flash as a visual reminder the transceiver is scanning.

-Press and hold the VFO/ M^V key for longer than 1 second.

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6. Scan will begin in an upward direction.You can reverse the direction by rotating the Tuning control counterclockwise, or by pressing the microphone OWN switch.

7. Scan will stop whenever a signal is received (that activates the BUSY indicator) for a limited time,

8. Press the PTT switch or any front panel key to stop scanning.

26

5-5-5 Memory Channel Scan

1. Adjust the SQL control to the threshold point.

2. Press and hold the MR/M key for longer than 1 second. The MHz indicator will flash as a visual reminder the transceiver is scanning.

-Press and hold the MR/M key for longer than 1 second.

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Notes

1. The transceiver will not scan if there is only one memory channel.

2. The transceiver will skip any locked-out channels.

3. The transceiver will scan only the memory channels in which frequencies have been stored.

3. Scan will begin at the current memory channel and proceed sequentially .i.e.Ml -> M2 -> M3 etc. Only those memory channels with data entered are scanned.

4. Scan will stop whenever a signal is received (that activates the BUSY indicator) for a limited time.

5. Press the PIT switch or any front panel key to stop scanning.

5-5-6 Memory Channel Lockout The Memory Channel Lockout function allows you to temporarily skip unwanted Memory Channels during Memory Channel scan.

Press the MR/M key to select the Memory Channel mode.

Select the Memory Channel that you wish to skip by using the Tuning control or the microphone UP/DWN switches.

Press the F key for longer than 1 second, The F indicator will flash. Within 10 seconds of pressing the F key press the MR/M key. A star (*) will appear to the left of the Memory Channel number . This indicates the Memory Channel will be skipped during the Memory Channel scan operation.,

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- Press the key for longer than
1 second.

4. Repeat steps 2 and 3 to lock out any other Memory Channel that you want to skip

5. To cancel the lockout , select the desired Memory Channels as described in step 1,2,and 3 above.

The star (*) will go out. The Memory Channel will now be scanned normally.

27

5-5-7 Priority Alert Function

The priority alert function allows you to monitor memory channel 1 for activity even when you are tuned to a different channel number. When the Priority Alert function has been activated the microprocessor will switch the transceiver to the frequency stored in memory channel 1 once every 5 seconds. The transceiver will determine if a signal is present. If no signal is present the transceiver will return to the original frequency. If a signal is present, a beep will sound from the speaker to signal the channel is busy. This whole process takes just a fraction of a second, so you wilt not see the display frequency change. The only thing you will notice is a momentary pause in the signal on the currently displayed frequency. To activate the priority alert function:

1. Ensure the frequency you wish to monitor has been entered into memory channel 1.

2. Adjust the SQL control to the threshold point.

3. Press the F key momen-

tarily, and then press nH_Z .^^

the SHIFT/AL key. The fS^TSTf - f

AL indicator will turn on "^^ ""O.5uu in the display to remind If j) L~"' r~~r~",., J" you that this function [^^^QE)0® SQ© @°<8[ has been activated. *"

4. If a signal is present a beep will be heard from the speaker.

5. To turn this function off repeat step 3. The AL indicator will turn off.

oa @*e.

Note:

During the period memory channel 1 is being scanned you will not

hear voice communications, only the beep will be heard if a signal is

present.

5-6 REPEATER OPERATIONS
5-6-1 Transmitter Offsets

All radio repeaters utilize a separate receive and transmit frequency. The receiver frequency may be either above or below that of the transmit frequency. The configuration of most repeaters will fall into one of the categories listed below:

TM-241A/
241E

TM-441A

TM-441E TM-541A

European i

version ;

TM-541E

+ 600 kHz

+ 5 MHz

+ 1.6 MHz; +12 MHz

+ 35 MHz

-600 kHz

-5 MHz

-1.6MHz; -12 MHz

-6 MHz

L "-

-7.6MHz; -20MHz

Offset Direction

To select the desired transmitter offset direction press the SHIFT/AL key. Each time you press the key the transceiver will advance from one direction to the next,

i.e. "+" to "-" ("-" to " i( with TM-441Eand TM-

541A) to no offset (simplex).

Automatic Offset Selection (TM-241A U.S.A. version) The TM-241A has been programmed according to the standard ARRL (Amateur Radio Relay League) Band Plan with regard to transmitter offset direction. Please see the accompanying chart for addition information on this programming. You can, of course, override this by using the SHIFT/AL key if desired.

145.1 145.5 146.0 146,4 146.6 147.0 147.4 147.6 148.0

L§_

-! si

_s_

[^r

[sl^

_s^

S: simplex

28

5-6-2 Reverse Function

Some repeaters utilize a "Reverse Pair11, i.e. the transmit / receive frequencies are exactly the reverse of another repeater For example repeater A uses 146.000 for a transmit frequency (INPUT) and 146.600 for a receiver frequency (OUTPUT), Repeater B might use 146.600 for a transmit frequency and 146.000 for a receiver frequency. It would be inconvenient to have to reprogram the transceiver each time you wanted to use these repeaters.

The REV/STEP key allows you to easily reverse the transmit and receive frequencies. To use the REV function press the REV/STEP key, The REV indicator will turn on in the display to remind you that you are working a reverse pair,

To return to normal press the REV/STEP key again. The REV indicator will turn off.

This function is also useful to check the input frequency of the repeater so that you can determine if you are within range for simplex communications.

5-6-3 Tone Operation

Some repeaters require the use of a control signal to activate the repeater. Several different methods are currently in use,

In the United States sut>audib!e tones are sometimes used. 38 different Sub-audible frequencies are possible. In Europe a 1750 Hz tone is used in transmit. Press and hold the Microphone 1750 key to transmit with the access tone; you need not press the PTT key. Since this tone is required in Europe and the United Kingdom a 1750 Hz tone encoder is included with models delivered to these countries.

5-6-4 Tone Frequency Selection

1. Press the F key for longer than 1 second. The F indicator will begin to flash. Press the TONE/T.ALT key within 10 seconds of pressing the F key, The current tone frequency will show in the display.

Press the key for longer than
1 second.

2. Rotate the tuning control or press the microphone UP/DWN switches to select the desired tone frequency.

3. Press any front panel key to return to the normal frequency display.

Tone Frequencyf Hz)

67.0 |

107.2

167.9

71.9

110.9 j 173.8

| 74.4

114.8 ,

179.9 |

77.0

118.8

186.2

79.7

123.0

192.8

82.5

127.3

203.5

85.4

131.8

210.7

88.5

136.5

218.1

91.5

I 141.3

225.7

94.8 ; 146.2

233.6

I (97.4)

j 151.4

241.8

i 100.0

156.7

I 250.3

103.5

162.2

Note : 97.4 Hz is available only for encode.

29

5-6-5 Autopatch Operations (U.S.A. versions

only)

Some repeaters offer a service known as autopatch. This feature allows you to dial a telephone number from your transceiver and carry out a telephone conversion, much like a car telephone, or cellular telephone. This function requires the use of a DTMF (Dual Tone Multi Frequency) pad. The MC-44DM microphone provides the normal keys you would have on your telephone at home, as well as 4 additional keys, the A,B,C, and D keys. These keys are used for control operator of the repeater to see if they offer autopatch services,

To activate the keypad:

1. Press and hold the PTT key,

2. Press the keys just like you would dial your telephone at home.

3. The transceiver will remain keyed for approximately
2 seconds after you press each number, so you can release the PTT switch without unkeying the transceiver.

Note:

Some repeaters will require the use of a special key I sequence to activate the Autopatch function. You ! should check with your control operator for this sequence.

5-7 TONE/CTCSS OPERATION

With the use of the optional Sub-Audible tone decoder unit (TSU-6) you will be able to operate in a Tone Operated Squelch Mode. When this option is installed and the CTCSS function has been activated the radio will not open squelch until the proper PL tone is received.

Press the TONE/T.ALT key and select the desired Tone mode. When the T indicator appears in the display the transmitter will transmit the desired tone. When the CTCSS indicator appears in the display the transceiver will transmit the desired tone and will also operate in the Tone Squelch mode. i.e. squelch will not open until the same tone is received as a portion of the incoming receive signal. When no indicator is on the radio will not make use of either tone feature.

No indicator

CTCSS

Note:

Even if the TSU-6 is not installed, tone signals can be transmitted, so the tone squelch of the other transceiver can be opened,

30

5-8 DTSS (Dual Tone Squelch System)

OPERATION [Requires optional DTU-2]

This function allows squelch to be turned on in the

receive mode on reception of a three-digit code

matching the DTSS code selected in your radio.

Once squelch is turned on by reception of a matching

code, it operates normally from then on. If no signal is

received for longer than 2 seconds, squelch is turned off

until a matching code is again received.

CTCSS signal cannot pass through the repeater, but

DTSS signal can pass through the repeater. _____

PN'OTE " "~ " ~~!

This function is not available in some areas.

The DTSS (or PAGIMG) cord may not be accepted if the

repeater is "identifying". If this should occur you should press

the PTT switch again, and retransmit the DTSS (or PAGING)

cord.

There are two recommended methords of compensating for ,

this situation.

j 1. Press the PTT switch for a few seconds, send the DTSS (or PAGNG) cord, release the PTT switch, then press the PTT switch again and resend the appropriate cord. | 2. Proper DTSS (or PAGING) operation will occur if you ensure | the battery saver circuit is disabled whenever you intend to operate using eithr the DTSS or PAGING modes.

5-8-1 Selecting and Storing the DTSS code

DTSS codes from 000 through 999 can be selected from the VFO mode and stored in memory channels Memory channels 1 through 3 can each store a separate DTSS code.

Memory channels 4 to 20 and the call channel cannot store DTSS codes, but a DTSS code can be set each mode.

5-8-2 DTSS Code Selection

When DTMF unit DTU-2 [option] is installed, the initial setting is 000.

DTSS r n n n

L UUU

o Selecting and Storing the DTSS code with the VFO

1. Press the DR/DT key to light the DTSS indicator.

2. Press the F key, then press the DR/DT key while the F indicator is on (10 seconds). The first digit of the DTSS code will flash.

3. Select the first digit by rotating the Tuning control.

4. Press the DR/DT key. The first digit is registered and the second digit begins to flash.

5. Select the second digit by rotating the Tuning control.

6. Press the DR/DT key, The second digit is registered

31

and the third digit begins to flash.

7. Select the third digit by rotating the Tuning control.

8. Press the DR/DT key and the complete DTSS code is registered, The mode returns to the previous one.

o Selecting and storing a code with the DTMF KEY PAD (MC-44DM)

1. Press the DR/DT key to light the DTSS indicator.

2. Press the F key, then press the DR/DT key while the F indicator is on (10 seconds). The DTSS code setting mode will be entered and the first digit of the code will flash.

3. Then enter a three-digit number on the key pad.

Notes

1, If a key other than the DR/DT key on the front pannel is pressed during operation, code selection mode is canceled.

2, If no action is taken for longer than 10 seconds, code selection mode is automatically canceled.

5-8-3 Selection using memory channels 1 through 3

o Storing VFO frequencies and DTSS codes at

the same time

L Select the desired frequency to be stored in memory in the VFO mode.

2. Follow steps 1 through 8 above in the VFO mode.

3. Press the F key

4. Select the desired memory channel (1, 2, or 3) with the tuning control or the UP/DWN key on the microphone.

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5. Press the MR/M key

o Rewriting DTSS codes in memory channels (Ito3)

1. Press the F key while the memory channel is operating, then press the DR/DT key while the F indicator is on. The DTSS code setting mode will be entered and the first digit of the code will flash.

2. Store the selected code in memory.

Follow steps 1 through 8 in VFO mode to edit a stored code.

32

5-8-4 Using the DTSS function

1. Adjust the SQL control to the threshold point.

2. Press the DR/DT key. The DTSS indicator will light. Each time the DR/DT key is pressed, the DTSS and paging functions will be selected:

DTSS: OFF

DTSS :ON 1

I DTSS : OFF

PAGING:OFFj

| PAGING :OFF

PAGING :ON

-l

! i

DTSS indicator

P indicator I

lights.

o RECEPTION

3, Squelch will open when the proper code is received.

o TRANSMISSION

4. When the PTT switch is pressed, the code shown in the figure is sent out for about 0.5 second.

PTT ON T

PTT OFF

Code (Approx.
0.5 seconds)

Note

Voice output is muted during code output.

5. To cancel the DTSS function press the DR/DT key twice time.

5-8-5 Using DTSS with a repeater

The DTSS signal is transmitted after a short delay if the PTT switch is pressed while the - or + indicator is lit. This is to avoid any malfunction due to the DTSS signal being interrupted by repeaters with long response times

o Delay during DTSS output

A delay is built in when the DTSS is sent out.

The delay time for normal transmission is 250 ms (not

modifable).

The initial setting for shift, split channel, and duplex

is 450 ms, and can be changed to 750, 850, or 1000

ms.

o Changing the delay time

1. Turn DTSS mode on.

2. To change delay time press the F key for longer than
1 second and press the CALL key while the F indicator is flashing.( within the 10 seconds.)

Display the desired delay time with the tuning control or the UP/DWN key on the microphone. The displayed delay time takes effect immediately. If any other key is pressed or if, after 10 seconds, no key has been pressed, the delay time setting mode is terminated.

33

5-9 DRS (Digital Recording System) OPERATION

The optional DRU-1 (Digital Recording Unit) permits you to manually or automatically record up to a maximum of 8 different voice messages for later playback. The automatic recording function works in conjunction with the T.ALT function.

This function can be used with the DTSS or paging mode.

Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing. This operation will change the modes as follows:

Normal Mode

DRS selection mode

DTMF control mode

Normal Mode

No DRS functions active.

DRS selection mode

Recording and playback

Selectable tone quality level and or number of

phrases

DRS indicator lights in the display

o DTMF control mode

1. Automatic Recording

The DRS indicator will flash.

2. The DRS function can be remotely controlled by an external DTMF signal. The DRS indicator goes on continuously.

5-9-1 Before Recording

The recording conditions are preset at the factory for

the following settings:

Tone Quality Level 1

Maximum recording phrase 8

Current Recording Phrase number 1 st.

0 : Recording and playback OK. 1: Recording LOCK.
2 : Recording and playback LOCK.

DRS

Tone quality level

34

5-9-2 Tone Quality Level Selection

1. DRS indicator fights in the display.

2. Press the TONE/T.ALT key. Each time you press the TONE/T.ALT key the tone quality indicator will advance, i.e. from 1 to 2 to 3 and the back to 1, etc. Tone quality 1 will provide the best audio quality, but the shortest recording time. Tone quality settings 2 and 3 provide longer recording times but with an associated decrease in tone quality.

I Tone quality Indicator

(gvflr

h ssS8 I I

I ^_ ,__, ,_Brt*-

_T>-J41* *L T-*LT

S>"© 0*®

5-9-3

5-9-3 Selecting the maximum number of

Phrases

1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing.

DRS indicator lights in the display

2. Press the SHIFT/AL key. Each time you press the key the maximum phrase indicator will step one position, i.e. from 8 to 4 to 2 to 1 and then back to 8.

I MAX. number of phrases

nn/7

LtU LJ

I I t I

;rr't

B°© 0°0 ©'@J

Relationship between the maximum number of phrases, sound quality level, and recording (playback) time

If the maximum number of phrases is set to 8 and the sound quality level is set to 1 (standard), the recording time for one phrase will be 4 seconds. Since the phrase number goes from 1 to 8, eight different recordings are possible. To increase the recording time, set the maximum number of phrases to 1 and the sound quality level to 3. The recording time will become 96 seconds. In this case, only one phrase can be recorded, so the currently recorded phrase will be erased when a new one is recorded. Set the maximum number of phrases and the sound quality level as required. The recording (playback) time for each phrase cannot be set.

Number of maximum phrase

Sound quality level

(second/phrase)

35

5-9-4 Recording

o Recording an incoming receive signal manually.

1. Select the desired operating frequency. Recordings can be made from the VFO mode, the Memory Mode or the Call Channel mode.

2. Press the F key for longer than a second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode.

The DRS indicator should turn on in the display. Select the desired phrase number by rotating the tuning control.

3. Press the VFO/M^V key to begin recording. The recording time indicator will show the elapsed time of the recording,

I Elapsed time

TT^n Q i t
2CuO r i

CB"© e°0£

4. Recording will stop when the time indicator reaches "00". To continue recording from the same frequency rotate the tuning control to the next phrase number and then press the VFO/M^V key again to begin recording. Recording will stop when any front panel key is pressed.

o Recording Signals from the Microphone

1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode. The DRS indicator should turn on in the display. Select the desired phrase number by rotating the tuning control.

2. Press the MR/M key to start recording from the microphone. The recording time indicator will indicate the elapsed time of the recording. If you wish to transmit the same message while recording you should press the microphone PTT switch before

you press the MR/M key.

/ U.S.A. \

j- Elapsed time ^ version J

-c"S8 I I

,© 0Q0 ©*e.

r- v =,-.",'

! ^000

OGoe i AOOG

3. The recording will stop when the elapsed time indicator reaches "00M. If you wish to continue recording you will need to rotate the tuning control to the next phrase number and press the MR/M key again.

Recording will stop when any front panel key is pressed.

36

5-9-5 Play Back

1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode.

The DRS indicator should turn on in the display. Select the phrase number of the phrase you wish to replay.

2. Press the CALL key to play back the message. If you wish transmit the message at the same time you should press the PIT key before pressing the CALL key. The elapsed time indicator will begin counting the elapsed time.

I-Elapsed time

(5vsr

zD8 I !

oQ 0o0 Qo^T?

J5Q,

3. Playback will stop when the time indicator displays "00". You can manually stop the play back by pressing any front panel key.

5-9-6 Automatic Recording

1. Select the desired operating frequency. Adjust the SQL control to the threshold point. Automatic recording is possible in the VFO mode, Memory Channel mode, or Call Channel mode.

2. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode.

Select the desired tone quality, the number of recording phrases, and the beginning phrase number,

3. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DTMF control mode. The DRS indicator will flash.

4. Press the TONE/T.ALT key. The T.ALT indicator will light and the recording wait mode (automatic recording mode) will be entered.

QVQT

- IHS.SOO

;x>'

j9°© e°0 ©°BJ

37

Only a signal with the proper CTCSS tone (if the TSU-
6 is installed ) will initiate recording. If no tone unit is installed the recording will start whenever squelch opens. (The alert function will not sound an alarm.) The CTCSS, DTSS (only reception is possible even if the DTMF unit is not installed), and paging functions are available.

If the squelch is closed during recording in the automatic recording mode, recording will finish at the current phrase, and the next phrase will be awaited even if there is recording time remaining. (Recording will not be possible if there is no empty phrase.

OLock canceling

If the third digit of the display is "l"f recording is locked, and a new signal cannot be recorded in the same phrase. If the third digit is "2", recording and playback are locked, and a new signal cannot be recorded in the phrase and the phrase cannot be played back.

To cancel the lock, press the REV/STEP key so that the third digit become zero(O).

5-9-7 External Control of the DRS Function (DTMF control mode)

The DRS function can be remotely controlled by an external DTMF signal.

5-9-8 ID Number Seting

Select a four-digit number from 0000 to 9999.

1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing. The DRS setting mode will be entered and the DRS indicator will light.

Press the key for longer than 1 second.

2, Press the MHz / LOCK key. Four digits will be displayed, and the first digit will flash.

_vn,nnn ,uu u u

£),0 00Q QcQ

3. Set the first digit with the tuning control, then press the MHz/LOCK key. The second digit wil! flash.

38

4. Set the second digit with the tuning control, then press the MHz/LOCK key.

The third digit will flash.

5. Set the third and fourth digits. When the fourth digit has been set, the DPS setting mode will be automatically reentered.

OThe digits can be set with the MC-44DM (option). Perform steps 1 and 2, and key in the number with the numeric keys.

Each time a key is pressed, a digit is set. When all the digits have been set, the frequency will be displayed again.

5-9-9 Setting the DTMF Control Mode

1. Select the receive frequency.

2. Enter the DRS setting mode, and specify the number of phrases, sound level, and ID number (See Sections
5-9-1/2,5-9-5, and 5-9-8.)

3. While in this state, press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing. The frequency will be displayed again and the DRS indicator will flash.

4. Press the F key. The DRS indicator will stop flashing and stay on. The transceiver will be ready to be controlled remotely.

The automatic recording mode will be ignored, as will the DTSS and paging modes.

5-9-10 External Control Method

For external control, recognition code # or * will transmit a four-digit ID number and three-digit command code,

# I 2 3 4 -X- 0 1

Leading zeroes in the ID number can be omitted,

oList of DTMF commands

See next page

Note:

To transmit a DTMF signal, press a key within five seconds of pressing the preceding key. If there is a time delay of longer than five seconds, the DTMF signals that have been transmitted will be cleared.

-Press the key for longer than
1 second.

39

*

I 00

Reset command and stop recording

; Record with the first i ! phrase

Record with the second phrase

Record with the third phrase

1 . ___j

i 04

Record with the 4th phrase

Record with the 5th phrase

r " 1

[

Record with the 6th j

| phrase !

I I

j 07

Record with the 7th phrase

Record with the 8th phrase

Record with each phrase for which recording is not locked

i 10

Unlock recording of all phrases

_^_ 1

Unlock recording of i the first phrase

r" '

Set 1 for the tone

quality

: i

Unlock recording of the second phrase

Set 2 for the tone i quality

I Unlock recording of the third phrase

Set 3 for the tone quality

I
14 !

Unlock recording of the 4th phrase

I 15 !

Unlock recording of i the 5th phrase

I " ~ ~ \

Set 1 for the number i

of phrases

Unlock recording of the 6th phrase |

j Set 2 for the number I of phrases

Unlock recording of the 7th phrase

Set 4 for the number of phrases |

, Unlock recording of the 8th phrase !

Set 8 for the number of phrases

Automatic recording |

mode on !

j Automatic recording

i mode off

i __^_

40

5-10 PAGING

The paging function is available when the optional DTMF unit (DTU-2) is installed.

The paging function is useful to call all stasions a group, a specific station, or wait for a call from another station by using DTMF(Duai Tone Multi Frequency signaling. Example: When station 2 is called

F : 145.660MHz Your code \ \\\ ^ Station's code : 333

^*v

i 45.660MHz

333 J[l_,

Stations Your code

F : 145.660MHz

individual code 'o 222

Station I

F : 145.660MHz

Individual code : 333

Station 2

F : 145.650MHz

Individual code ; 444

Station 3

The common group code and individual codes should be determined in advance, These codes should be from
000 to 999 (3 digits). Unlike DTSS, the code of the calling station is displayed on the receiver, so the receiver can identify the calling station.

When called by a local station, the individual code of the calling station is displayed. When called with a group code, that group code is displayed.

Paging operation procedure

Set your station code

1 Tune to frequency of the other station

Enter the paging mode

To call the other station

To stand by fora pager

Set the code of station to be called

Transmit

Call

Stand by

41

5-10-1 Paging Code Memories

There are five(5) paging code memories.

P1~P3

Use

Store your individual ID code in memory.

Automatically stores the calling stations code during reception. Can temporarily set code for the station.

Stores group codes and local station codes in memory.

5-10-2 Setting the Paging Codes

1. Press the DR/DT key to enter the paging mode. The P indicator will light.

2. Press the F key, then press the DR/DT key while the F indicator is on. The code setting mode will be entered and the memory channel indicator will flash.

4. Press the DR/DT key. The first digit will flash.

(Not necessary this operation if you use DTMF microphone)

5. Set the desired number with the tuning control and press the DR/DT key (or key 0 to 9 on the microphone with DTMF). The first digit will be set, and the second digit will flash.

§w

P--- &

"lQ;3D""i

_Qo^ QoQ ®"$j3

3. Set the desired memory (0 to 3 or A) with the tuning control (or key 0 to 3 or A on the microphone [option] with DTMF).

6. Set the second and third digits with the tuning control, and press the DR/DT key.

7. If, after 10 seconds, no key has been pressed, or a key other than DR'/DT or MR/M is pressed, the code will be set.

42

i

For example, the

following groups communicate

with each other.

Predetermined frequency 145.660MHz

Your individual code 111

Station 1's individual code 222

Station 2's individual code 333

Station 3's individual code 444

Group code

789

Your memory

PA 111

P2 444

P3 789

Station 1 memory

PA ??2

P2 789

Station 3 memorv

Station 2 memory

PA 444

PA 333

PI 789

P3 789

P2 111

5-10-3 Paging Transmission(Calling)

Your individual ID code is preset in memory A. (Your individual ID code is always stored in memory A.)

1. Tune to the predetermined frequency.

2. Press the DR/DT key to light the P indicator.

3. Press the F key, then press the DR/DT key while the F indicator is flashing.

(5W

/ / i

t t r

tfi

;xr

ofTonel {""

4. Select the memory number in which the local station code is stored using the tuning control.

Turn the paging function of the other transceiver on.

43

Calling all station in the group

1. To call all station in the group, select the memory number in which the group code is stored. In this example, the number is stored in number P3.

2. Press the PIT key once or press a key other than DR/DT or MR/M to display the frequency again.

3- Press the PIT switch.

145.660MHz
789*111

Calling a specific station(Example: Call station 3.)

To call a specific station (for example, station 0. 3), use

the following procedure:

1. Select the memory in which the locai station code is stored (in this example, select memory P2.) or Enter the individual code of the local station in memory 0.

2, Press the PTT key once or press a key other than DR/DT or MR/M to display the frequency again.

3. Press the PTT switch.

§W'

Nfttfifl PB

, ooo"o*o*o?JPJI |^na

S\V /, TM-a*l* 1; r^r ,Tt>

^S^0Q0 0oQ 0o(C?

Group code 789 and your station ID code 111 are transmitted. A DTMF tone sounds is heard during transmitting.

145.660MHz
444*111

Cftf'.Q""

*S.SSQ r?

. ooifii.iMfJllli EBBS'

°Q;XT'

\_y\ yy^ JL L^LT ,,£- ^_-

^^^^g)0Q 0o0 00("^J

Local station code 444 and your station ID code 111 are transmitted. A DTMF tone sounds is heard during transmitting.

44

5-10-4 Paging Reception (Stand by)

1. Tune to the predetermined frequency.

2. Press the DR/DT key to light the P indicator.

Stand by with individual code (Example: Stand by for

station 3,)

3. When called with your station ID code, the memory number automatically change to 0. The ID code of the member 3 is displayed.

local station code

--i-

/Flashing

p*m -:&

- 3 -- T, / fl OVER -

Zero is displayed to indicate that your station is being called.

4. The squelch is opened.

5. The individual code of the calling station is stored in memory 0. Press the PTT switch to respond to the calling station.

4 145.660MHz vy 444*111

6^*£T

p*m PS..,

oMM-M*MViH! '

( )' o "^ - '-^^-^ jtatj

When the transmission ends, the frequency will be displayed again.

After the local station has been contacted, cancel paging mode. Communication can be performed more efficiently.

If the local station code can not be decorded, "Err" appears on the display.

Err

Pn u

SSRF -

1 3 S 7 9 OVER

45

Stand by with group code

1. When a call is received with the group codet the squelches of all the members of the group are opened to enable reception.

When you are called with the group code, the common group code and its memory channel number are displayed.

(Example: Group code 789 is stored in channel 3.)

Group code Flashing

f 1

. j,

~^\ -&

-j

P183

SSRF 1 3 - S - / H [1VC P

3 is displayed to indicate that the station is being called.

5-10-5 Code Lockout

(A code is locked out only during reception with the paging function.)

If an individual code is stored in P1,P2 or P3, reception is enabled when the codes match, even if one local station communicates with another. To use memories PI to P3 for transmission only, lock out the memories. When you are communicating with two or more groups having the same frequency, lock out the group code with which stand by is temporarily stopped.

o Paging memory lockout

1. Enter the code setting mode and display the number (except memory 0 and A) to be locked out using the tuning control.

2. Press the MR/M key.

*rnark lights and the memory is locked out.

2. When the PIT switch is pressed, group code 789 (as displayed) and your station ID code are transmitted. You can participate in the group-roundtable,

3. After the remote station has been called, cancel paging mode.

Communication can be performed more efficiently.

P183 .*£

f^\ [-__ ''

1 jj/ __ TM-241* A. T.*LI 1TLF

^"^r^o^ "o(Q) £>.

^^(^00(7) 000 000JJ

3. To cancel, repeat steps 1 and 2.

46

5-11 TONE ALERT SYSTEM

The Tone Alert function will provide an audible "Alarm" to signal when someone is transmitting on the frequency you are monitoring.

Note |

1. When using the CTCSS function the incoming sigi nal must be present for approximately 2 seconds

in order for the Tone Alert function properly.

2. When the DTSS function is on, the bell function works only when the DTSS code matches. 1

3. When the paging function is on, the bell function works only when the paging code matches.

1. Adjust the SQL control to the threshold point.

2. If you will be using the CTCSS function you should select the proper tone frequency and ensure the CTCSS indicator is on.

If you will be using the DTSS function you should select the proper DTSS codes and ensure the DTSS indicator is on.

If you will be using the PAGING function you should select the proper PAGING codes and ensure the P indicator is on.

3. Press the F key and then the TONE/T.ALT key. The T.ALT indicator will light.

£rp"S'h'

W\ JJ, _ Tn-aaiA *t o *-* ""

^ss^Q^© Q°@ ("

,'vS.SOC

-Q"3

4. When a signal is received and the squelch is open, an alarm sounds for about five seconds, the T.ALT indicator flashes, and the elapsed time count begins.

5. The elapsed time is displayed in minutes to up to 59 hours 59 minutes. If a new signal is received during counting, the elapsed time is cleared, and the elapsed time from the new signal being received is

Counted. Flashing

S3S3

6. If a key is pressed while the elapsed time is being displayed, the T.ALT function is released.

7. To release the T.ALT function when no signal is being received, press the TQNE/T.ALT key again

Notes

1. When the PF key on the microphone is set as the monitor keyT the voice can be monitored by pressing the PF key while the T.ALT function is working.

2. The T.ALT function may fail if the received signal is abandoned (audio low-frequency distortion, ignition noise, etc.). In this case, the interference can be reduced by installing an optional TSU-6 and setting the CTCSS frequency to 141.3 Hz or lower. When a repeater is used, the CTCSS function is not available. It is recommended to use it with the DTSS function,

3. The tone Alert System can not be use in conjunction with Scan.

47

5-12 APO (Automatic Power Off)

The automatic power-off function turns the power off automatically if you forget. It does not operate during scanning. The initial setting is OFF.

1. To turn the APO function off and on, press the F key for longer than 1 second, then press the MHz/LOCK key within 10 seconds. The APO indicator lights.

2. If, after 2 hours 59 minutes in inactive receive mode, no key has been pressed, the APO indicator flashes and a beep sounds. If no key is pressed for 1 minute after that, the display indicates the following, all the functions are disabled, and the transceiver enters the automatic power-off state.

X>Y Ifi .^'ri'U'i Si ill-

^Wc©;© M^

5-13 DIM (DIMMER)

The intensity of dial illumination can be set to one of four levels.

1. Press the F key, then press the LOW/DIM key while the F indicator lights.

£/?

0-0 ©"

2. Select the desired value with the tuning control or the UP/DWN key on the microphone.

3. If, after 10 seconds, no key has been pressed, the displayed level is set and the original frequency is redisplayed.

3. To leave the automatic power-off state, turn the power switch off and on again.

r " o o "-o ~~" o " ' i

Notes

1. A small current flows during the automatic power off state. If the transceiver is not going to be used, be sure to switch the power off.

2. If the APO function is turned on and then the bell function is turned on, the automatic power-off function does not work until the bell function is turned off (though the indicator lights).

3. This function is not available when the remote controller is connected.

48

5-14 BEEP

The beep can be turned on and off.

Press the F key for longer than 1 second, then press the REV/STEP key while the F indicator is flashing. Each time this is done, the beep is turned on or off.

*- Press the key for longer than 1 second,

545 LOCK/A.LOCK

There are three types of lock functions.

When the switch on the rear of the microphone is set to the LOCK position, all the microphone keys except the PTT key are disabled.

(DLOCK

The panel keys (except F and MHz/LOCK key) and the tuning control are disabled. However, the microphone function works.

Press the F key, then press the MHz/LOCK key within
10 seconds. The LOCK indicator lights.

uS.500

000 ©D@

To release the lock, press the F key again, then press the MHz/LOCK key within 10 seconds.

<DA.LOCK(ALL LOCK)

All operations, except the power switch, volume, and squelch, are disabled.

Switch the power off while the LOCK indicator is on, hold down the MHz/LOCK key, and switch the power on again. The A.LOCK indicator lights.

fcrcri""

ALOCn

I I

| - -o-

vSS

nn uu

[^%^CB<b 0Q0 0o@j

To release A.LOCK, switch the power off while the A.LOCK indicator is on, hold down the MHz/LOCK key, then switch the power on again. The A.LOCK operation cannot be canceled by VFO or MR reset.

-I

49

7 MAINTENANCE

7-1 GENERAL INFORMATION

Your transceiver has been factory aligned and tested to specification before shipment. Under normal circumstances the transceiver will operate in accordance with these operating instructions. All adjustable trimmers and coils in your transceiver have been adjusted at the factory and should only be readjusted by a qualified technician with proper test equipment. Attempting service or alignment without factory authorization can void the transceiver's warranty.

When operated properly, the transceiver will provide many years of service without requiring realignment. The information in this section gives some general service procedures which can be accomplished without sophisticated test equipment.
7-2 SERVICE

If it ever become necessary to return the equipment to your dealer or service center for repair, pack it in its original box and packing, and include a full description of the problems involved. Please include your daytime telephone number. You need not return accessory items unless directly related to the service problem. Service note:

Dear OM, if you desire to correspond on a technical or operational problem, please make your note short, complete, and to the point, and PLEASE make it readable,

Please list: Model and serial number.

The problem you are having.

Please give sufficient detail for diagnosis. Provide information such as other equipment in the station, meter

readings and anything else you feel might be useful in attempting diagnosis.

Caution:

Do not pack the equipment in crushed newspapers for shipment. Extensive damage may result during shipment.

Notes:

1. Record the date of purchase, serial number and dealer from whom purchased.

2. For your own information, retain a written record of any maintenance performed on the unit.

3. When claiming warranty service, please include a photocopy of the bill of sale, or other proof of purchase showing the date of sale,

50

7-3 IN CASE OF DIFFICULTY

The problems described in this table are failures caused, in general, by improper operation or connection of the transceiver, not by defective components. Check according to the following table.

Symptom

Probable cause

Corrective action

Indicators do not light and no receiver noise is ,

heard when the POWER switch is turned on. I

1, I 2,

Bad power cable or connections.

Blown power supply fuse. |

i 2.

Check cables and connections. Check for the cause of the blown fuse and replace the fuse.

No sound from the speaker. No signal can be j received.

i 1*

Squelch is closed,

With the TSU-6 ; CTCSS is operating.

, 1, i 2.

Turn the SQL control counterclockwise. Press the TONE/T.ALT key to turn off the CTCSS

No transmitter output,

Microphone is not plugged in. Poor antenna connection,

\L.

Plug jack in.. <

Connect antenna securely.

Weak signal cannot be received.

Poor antenna connection.

Connect antenna securely.

Display is dark.

I £

Power voltage is low.

The DIM had been selected too dark.

Check voltage for 13.8 VDC ± 15 %, Press the F key and the LOW/DIM key.

See page 48

Memory cannot be backed up. [ Back up battery voltage is low. See

Microprocessor memory backup page 21.

The display will not change when the tuning control is rotated or a key is pressed.

i. i2-

The lock is on. A.LOCK is on.

1.
2.

Press the MHz/LOCK key within ten seconds of pressing the F key. Hold down the MHz/LOCK key, switch the power on, then perform the operation in 1.

51

8. OPTIONAL ACCESSORIES

MC-44/MC-44E (E: European Version) MULTI FUNCTION MICROPHONE

o MC-60A MICROPHONE (8-pin)

The zinc die-cast base provides high stability. The MC-6GA is complete with PTT and LOCK switches, UP/DOWN switches, impedance selector switch and a built-in preamplifier.

Using MC-6QA with the transceiver does not comply with the European EMC standard.

MC-44DM/MC-44DME

(E: European Version)

MULTI FUNCTION MICROPHONE

WITH AUTOPATCH -^

o MC-85 MICROPHONE (8-pin)

The MC-85 is a unidirectional high-class electret condenser microphone provided with an output selector switch, audio level compensation circuit, low cut filter, level meter, PTT and LOCK switches.

o MC-80 MICROPHONE (8-pin)

The MC-80 is an omnidirectional electret condenser microphone that is provided with UP/DOWN switches, volume adjustment for output level, PTT and LOCK switches, and a built-in pre-amplifier.

PS-33

REGULATED DC POWER SUPPLY

SP-41 MOBILE SPEAKER (4 ohms)

o SP-50B MOBILE SPEAKER (8 ohms)

Compact and smart, high quality external speaker provides flexibility of installation for maximum convenience. ^^^^^^g--^^^

DTU-2

DTMF UNIT

NOTE: 1750 Hz repeater access tone is only available from MC-44E or MC-44DME European version microphone.

52

TSU-6 CTCSS UNIT

PG-3G

DC LINE NOISE FILTER

DRU-1

DIGITAL RECORDING

UNIT

PG-2N

DC POWER CABLE

MB-201

MOBILE MOUNTING BRACKET

MB-12

MOBILE MOUNTING

BRACKET

53

Installing accessories

CAUTION

1. Before installation , be sure to disconnect the DC power supply,or battery, or damage may occur the equipment.

2. You can not install the digital recording unit(DRU-
1) and the DTMF unit together.

You should choose one unit to install.

i "_ "

CTCSS unitTSU-6

The use of the optional sub-audible tone decoder TSU-
6 allows CTCSS (Tone squelch) operation. When this option is active squelch will only open when the proper tone is received.

Installation /^*&

1. Remove the 2 screws secur- / ^^^ ing the Top cover. r^>^ ^Sk/^]

2. Carefully remove the top fefe^S^^V^x cover.. (Fig.l ) r^^^r^^

3. Remove the backing from ^^^^jjx^ the small cushion provided Detent

with the TSU-6 and attach r.a *

it to the back of the TSU-6 9'

as shown in Fig. 2.

x TSU-6 untt

4. Attach the cable from /" Anach the cab|e TSU-6 as shown in Fig. 2. cushion^ c-^>< ^*L

5. Remove the backing from ^^^^::^-^^_ the other side of the small ^x^t^rN^^^fe^, cushion and attach the ^< ^^ff^^^^^^^ TSU-6 to the transceiver as fa.\^ fi^J' "^ shown. \^\ ; ^^/^^^^

6. Replace the cover and ^<^ ^\ tighten the screws to ^-v complete the installa- ^<-

tion. Fig, 2

Detent

Fig. 1

TSU-6 unit

Attach the cable.

Digital Recording Unit DRU-1
1. Remove the 2 screws securing the Top cover. Carefully remove the top cover. (Fig. 1)

2. Attach the three cables from the DRU-1 in the transceiver as shown in Fig. 3. Don't forget to attach the TSU-6 as shown if you are installing this unit at the same time (Fig. 4).

Fig. 3

TSU-6

Attach the cushions

Route the wiring

3. Tighten the screws (Fig. 5).

4. Replace the cover and tignten the screws to complete the installation.

Fig. 4

Fig, 5

54

DTMF unit DTU-2

1. Remove the 2 screws securing the Top cover.

2, Carefully remove the top cover. (Fig.l )

3. Remove the backing from the small cushion provided with the DTU-2 and attach it to the back of the DTU-2 as shown in Fig. 2

4. Plug the three connectors into the sockets in the

units.

5. Attach the cable from DTU-2 as shown in Fig. 2 and 3.

6. Replace the cover and tighten the screws to complete the installation.

Olnstalling TSU-6 and DTU-2

Attach these units on the top of VCO shield (Fig.3).

DTU-2

Detent

Fig. 1

DTU-2

Cushion

Fig. 2

TSU-6

Cushion

TCXO

Fig. 3

55

CO

irt

Q

LU ^.

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