Kenwood TM-741A User Manual

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144/220 MHz FM MULTI BANDER

TM-641A

144/440 MHz FM MULTI BANDER

TM-741A

144/430 MHz FM MULTI BANDER

TM-741A

144/430 MHz FM MULTI BANDER

TM-741E

INSTRUCTION MANUAL

KENWOOD CORPORATION

©PRINTED IN JAPAN B62-0082-10(K)(T) 92/12 11 10 987654321 91/12 11 10 9 8 7 6

Thank you for purchasing this new transceiver.

IMPORTANT:

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

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-641A: 144/220MHZ FM MULTI BANDER

(U.S.A.version)

TM-741A: 144/440MHZ FM MULTI BANDER

(U.S.A. and Canadian version)

TM-741A: 144/430MHZ FM MULTI BANDER

(General markets)

TM-741E: 144/430MHZ FM MULTI BANDER

(European markets)

NOTE: If disregarded, inconvenience only, no

risk of equipment damage or personal injury.

CAUTION: Equipment damage may occur, but not

personal injury.

Save this instruction manual.

Illustrations show the TM-741A.

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.

1. BEFORE OPERATION

2. SPECIFICATIONS and ACCESSORIES

3. INSTALLATION INSTRUCTIONS

4. OPERATION 4-1 OPERATING CONTROLS

Front Panel ................................................... 12

Microphone .................................................. 16

Display Panel ............................................... 18

Rear Panel and Side case

4-2 RECEIVER OPERATION

Receiver Operation ...................................... 21

Frequency Selection Frequency Step Selection ProgrammableVFO Tuning Limits ... 23 A.B.C.(Automatic Band Change)

Band Selection ............................................. 25

Attenuator ON/OFF ALT (Automatic Lock Tuning)

4-3 TRANSMITTER OPERATION

Transmission

TX Alert ....................................................... 27

Time-Out Timer (TOT)

Bandwidth Selection .................................... 28

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12 12

20 21

22 22

24 25

26 27 27

5 6 8

4-4 MEMORY ......................................................... 29

.Microprocessor Memory Back-up Microprocessor Initialization Memory Channels

Memory Contents ........................................ 30

Memory Entry ............................................. 31

Memory Channel Recall

Memory Banks Clearing Memory .Memory Shift

4-5 SCAN ................................................................ 36

Scan Options

Hold/Resume Programming ........................ 36

Band Scan Programmable Band Scan

.MHz Scan ................................................... 38

Memory Channel Scan ................................ 38

CALL Scan .................................................. 39

V/M/CScan .................................................. 39

Automatic Memory Scan

.Memory Channel Lockout

4-6 REPEATER OPERATION

Transmitter Offset

Reverse Function Tone and CTCSS Operation Autopatch Operations

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29 29 30

32 32 35 35

36 37

39 40 41 41 41 41

4-7 DTSS

4-8 PAGING ......................................................... 46

4 - 9 TONE ALERT SYSTEM................................ 51

4-10 AUTOMATIC POWER OFF (APO) 4-11 DIMMER (DIM)

4-12 BEEP TONE LEVEL ADJUSTMENT.... 53

4-13 BEEP TONE FREQUENCIES ....................... 53

4- 14 KEYLOCKS ................................................... 54

5. CLOCK ................................................................ 55

5 -1 CURRENT TIME AND DATE

5- 2 OTHER CLOCK FUNCTIONS

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

DTSS Code DTSS Code Selection

Using the DTSS Function ............................ 45

Using DTSS with a Repeater ....................... 45

Paging Code Memories

Code Selection ............................................. 47

Code Transmission

Paging Code Monitoring Code Lockout

Backup Switch.............................................. 55

Setting the Current Time and Date Current Time, Calender and Stopwatch in the

Clock display

Time-ON/Time-OFF Programming

Activating the SLEEP Timer

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44 44 44

47 48

49 50

55 55

5 - 3 CLOCK POSITION ON THE FREQUENCY

DISPLAY

Transceiver Function ON or OFF Transceiver Function OFF Transceiver Function ON Tri-Bander Clock Operation in the Frequency Display 60

6. MAINTENANCE

In Case of Difficulty .................................... 62

7. OPTIONAL ACCESSORIES CTCSS unit (TSU-7) 65 DTMF unit (DTU-2) 65 Panel Separation Kit (PG-4K^ PG-4L) 68 Bracket

Band Unit

BLOCK DIAGRAM and SCHEMATIC DIAGRAM

One additional band may be installed using options described in this manual. Operation instructions remain the same for the radio when uses a dual band or tri-band configuration.

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NOTICE

58 59 59

61 64

70 71

1. BEFORE OPERATION To prevent electric shock, fire and other

injury, please note the following:

Never remove the case unless instructed to do in this Instruction Manual. If the internal parts are touched accidentally, a serious electric shock might occur.

Do not place the unit in areas of 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 place this unit where it will be exposed to direct sunlight or close to heating appliances.

Do not place anything on top of the cabinet.

To ensure good ventilation, do not put anything on top of the cabinet and allow at least 15 cm (6 inches) of space behind the unit.

The power requirement is 13.8 VDC.

Never attempt connection to a 24 VDC source.

If an abnormal odor or smoke is detected, immediately turn the power off. Contact the KENWOOD service station or your 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 and ACCESSORIES 2-1. SPECIFICATIONS

E R

R A N

I T T E R

144 MHz Band

Frequency range MHz

Mode Antenna impedance Operating temperature Power requirements 13.8VDC±15% (11.7~15.8V) Ground

Current drain

Frequency stability Dimensions (WXHXD) 150X50X175 mm Wa^ 1.6 kg

Output power

Modulation Spurious radiation Less than —60dB Maximum frequoxy cfeviation Audio distortion (at 60% modulation) Microphone impedance

U.S. A and Canada 144 ~148

Other market 144 ~148 —

TM-741E

Transmit mode Receiver mode

MID

LOW Approx. 5W

144 ~146 —

Less than 11.5A

50W 25W

220 MHz Band

220 ~225

F3E(FM)

50D

-20'C~+60X (-4T~ +140°F)

N^ative

Less than 7.0A

Less than 1.2A

±10ppm

low

Reactance modulation

±5kHz

Less than 3%

6oon

440/430 MHz Band

438 ~450 430 ~440 430 ~440

Less than lO.OA

35W

144 MHz Band

E C E

NOTE: 1. Circuit and ratings are subject to change without notice, due to developments in technology.

Circuitry Intermediate frequency lst/2nd Sensitivity (12 dB SIN AD) Selectivity —6 dB Selectivity —60 dB

Squelch sensitivity Output (5% distortion)

External speaker impedance

2. Recommended duty-cycle: 1 minute Transmission, 3 minutes Receptioa

10.7 MHz/455 kHz

Double conversion superheterodyne

More than 2 W (8D load )(5% distortion)

220 MHz Band

30.825 MHz/455 kHz

Less tJian0.16;[/V (—10 dB/z) ^

More than 12 kHz

Less than 24 kHz

Less than 0.1 /¿V (—14dB//)

440/430 MHz Band

21.6 MHz/455 kHz

2-2. ACCESSORIES

Unpack your transceiver carefully and confirm that the accessories listed below are included in the box.

DTMF Microphone

( U.S.A. and Canada only)

or Microphone

(European version)

or Microphone

Microphone Hook..................... J20-0319-XX 1

( U.S.A. and Canada only)

Mobile Mounting Kit.................................................... 1

Bracket

Screw set ....................... N99-0331-XX

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

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

(General market)

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

T91-0397-XX T91-0398-XX T91-0396-XX

J29-0454-XX

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

1 1 1

Self tapping Screw

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

N46-3010-46

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

(U.S.A. and Canada only) Hex Wrench DC power Cable

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

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

W01-0414-XX .... 1

E30-3034-XX .... 1

FusedSA) ................................. F05-1531-XX .... 1

Instruction Manual Quick reference Warning sheet

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

B62-0082-XX 1 copy

B59-0441- x x 1 copy

B58-1001-XX 1 copy Warranty Card (U.S.A., Canada and European version

only) ............................................................................ 1

After unpacking Shipping container: Save the boxes and packing in the event your unit needs to be transported for remote

operation, maintenance, or service.

3. INSTALLATION INSTRUCTIONS 3-1. INSTALLATION

3-1-1. Installing the Microphone and Setting

the Clock Backup Switch

Before installing be sure to turn off the power switch.

1. Slide the release button on the front panel to the right. Carefully pull the front panel toward you from the right, then remove the whole panel unit. Be careful with the cord connecting the front panel unit to the chassis. (Fig. 1)

2. Insert the microphone connector into the microphone socket on the right of the main unit until it clicks. Make sure the tab on the connector is on top.

3. Place the microphone cord in the holder groove. (Fig. 2)

■BACKUP SWITCH

Inside the small cover of the front panel unit there is a Backup Switch to retain clock memory. If you set the switch ON »turning off the POWER switch, disconnecting the power cable or an intermittent power failure will not erase the clock memories.

4. Slide the small cover off of the front panel unit as shown in the accompaning illustration. (Fig.3)

5. Gently lift up on the cable near the grommet.

6. Set the Backup switch ON. Pay attention to the labelings.

7. Push the grommet down into its slot.

8. Replace the small cover until it clicks.

9. Route the cable as desired in the slots on the rear of the front panel.

1 ^

---------

[

)

10. Align the hook on the back of the front panel with the slot on the left of the chassis before replacing the front panel.

11. Push the front panel toward the chassis until it locks completely. Take care not to trap the connecting cord. The connecting cord is easier to manage when it is put in the groove on the back of the front panel.

12. Set the date and time ( See page 55 ).

(Fig. 1)

microphone

connector

release button

slot

holder

(Fig. 2)

(Fig. 3)

3-1-2. Mounting Bracket

Notes

1. When installing the transceiver in a vehicle consider ease of operation and safety when selecting the location for the mounting bracket.

2. Install the bracket securely so that it will not come off due to vibration.

1. Install the bracket using the supplied flat washers and self tapping screws (4 pcs. each).

2. Attach the transceiver loosely using the SEMS screws (4 pcs.).

3. Adjust the viewing angle of the bracket to the desired position.

3-2. CONNECTION

3-2-1. 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 8D2V for this connection. If the antenna is far from the transceiver the use of low loss coaxial cable, such as RG8U 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 lightning arrestor in your antenna lines for protection against fire,electric shock,personal injury,or damage to the radio itself.

Hold the transceiver in place and tighten the 4 SEMS screws using the supplied wrench.

3-2-2. Mobile Installations

Battery Connections

Cautions

1. Before installing the power cable, be sure to remove

the negative lead from the battery for safety.

2. After installation and wiring, be sure to double

check for correct installation before reconnecting the negative lead to the battery terminal.

3. If the fuse opens, be sure to check that each

conductor has not been damaged by short circuiting, etc. Then replace with a new fuse of the same rating.

4. After completing the wiring, wrap the fuse holder

with heat resistant tape to protect against heat and moisture.

5. Do not remove the fuse even if the power cable is too

long.

Make sure the positive (+) and negative (—) lead polarity is correct when connecting to the battery.

Engine compartment-——-Passenger compartment

Red

Fuse 0 f

\ To the

\transceiver

select a location wh«re the power cable ¡8 pro tected from heat, mois ture or abrassion when securing the cable.

If the wiring hole in the fire wall or chassis is too small, disassemble the fuse holder to thread the wire through the

hole.

________

Chassis or

"^fire wall

j£

Make sure the cable does not directly contact the edge of the hole by using a grommet.

From passenger compartment

Thread like this

Caution Leave enough space around the fan on the rear panel for good ventilation.

Connect the power cable directly to the battery terminals. Use of the cigarette lighter socket will lead to poor connection, and will result in poor performance. Pay close attention to the polarity of the cables when connecting them to the battery.

3-2-3. Fixed Station

A regulated DC power supply (13.8 VDC capable of supplying at least 12 Amperes) is required. The PS-430 and the PS-50 are recommended.

Caution:

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 VDC, negative ground. Battery polarity must be correct. The power cable is color coded :

Red + (Positive polarity) Black — (Negative polarity)

Caution: Leave enough space around the fan on the rear panel for good ventilation.

CONTROL SEITECT keys (Press) / Current Operating Band indicators These keys are used to select the key operating band.(To change the transmission

band, use the BAND SELECT key.) The green light shows which band will be controlled by the front panel controls.

When optional band unit is

installed.

BAND SELECT keys (Press) / VOL controls {Rotate) These keys are used to select the transmit band. They are also used to select the band you wish to control with the front panel switches. When a key is pressed the ”PTT” indicator will flash as a visual signal to show which band has been selected.

SQL (Squelch) controls

These controls are used to separately adjust each squelch threshold level.

VOL controls (Rotate) These controls are used to adjust the volume.

I Function key Assignments

Press the F key for longer than 1 second so that the key indicator begins to flash, then press the key below.

Key

F 1 Sec, F 1 Sec, F1 Sec,

F 1 Sec,

F 1 Sec, F 1 Sec,

F 1 Sec, F 1 Sec, F 1 Sec,

F 1 Sec,

CONT SEL

F 1 Sec,

BANDSEL

VFO

MR MHz

CALL

SHIFT

TONE

REV DTSS LOW

Automatic Power off functior

Function

Change Scan Hold/

Resume mode

Memory channel lockout

will turn on or off

The lower limit of the

programmable VFO

The upper limit of the

programmable VFO

Tone frequency selection

Beep tone level adjustment

DTSS code selection

Time-out timer on or off

Select receive detection

output band from the

microphone connector

Band on or off

Refer to

P.36 4-5-2

P.40 P.52

P.23 4-2-4

P.42

P.53 P.44 4-7-2

P.28

P.18 4-1

P.25 4-2-6

4-5-10

4-10

4-6-3 4-12

4-3-3

• Press and hold the F key, then the key Key Function

F+ VFO

F+ MHz

F+ MR F+ TONE

F+ DTSS F+ LOW F+

CONT SEL F+

BAND SEL F+ PIT

Enter the programmable scan

lower frequency limit

Enter the programmable scan

upper frequency limit

Clear the displayed memory

channel data

Bank status display

DTSS delay time selection

Memory consolidation

Automatic Memory scan

Clear Memory Bank

TX Alert

DClow.

Refer to

P.38 4-5-4

P.35 4-4-8 P.32 4-4-7

P.45 4-7-4 P.32 4-4-7

P.39 4-5-9

P.35 4-4-8 P.27 4-3-2

• Press and hold the key below and turn on the power switch.

Key Function

MR +

Power ON

F+BANDSEL

+ Power ON

Memory reset of all bands

Memory reset of a band

Refer to

P.29 4-4-2

Key

VFO+

Power ON

VFO-i-BANDSEL

-I- Power ON

MHz+

Power ON

CALL+

Power ON

F+SHIFT+

Power ON

F+TONE+

Power ON

F+DTSS+

Power ON

F-I-LOW +

Power ON

Function

VFO reset of all bands

VFO reset of a band

All lock on or off during Lock

Demonstoration mode

on or off

Tone alert selection

Set the time and date

With optional DTU-2: The microphone PF key can be used to change the beep tone frequency.

Wide /Narrow selection

Refer to

P.30 4-4-2

P.54 4-14

P.40

P.51 4-9

P.55 5-1-2

P.66 7-3-1

P.28 4-3-4

4-1-2. Microphone

(2) ®

®d)UP/DWN 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.

0LOCK switch

This key will deactivate all functions of the

microphone except the PTT function and DTMF

keypad.

(Dl6-Tone DTMF keypad

These buttons are used to activate the DTMF

encoder.

(DPF(Programmable Function) key This key can be programmed to perform any of the following functions: BAND SEL (*^) key (Initial setting from the factory); or MHz, T.ALT, TONE, REV, DTSS,

LOW, MUTE, or CONT SEL (^) key.

To program the key use the following procedure:

1. Turn off the POWER switch on the transceiver.

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.

(^) Press the PF key set in the CONT SEL or BAND

SEL key to cause the radio to switch from a band to the other. Pressing the PF key for longer than 1 second will not initiate scanning Press the PF key set in the CONT SEL or BAND SEL key to cause the radio to switch from one band to the other. Pressing the PF key for longer than 1 second will not initiate scanning.

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.

(2X:ALL key VFO key MR key

These keys function are like the CALL, VFO,or MR key on the front of the radio. (See page 12.and page 14) These keys can be programmed to function as the PF key. To program the key :

1. Turn off the POWER switch on the transceiver.

2. Press and hold one of these keys.

3. Turn on the POWER switch. The PF-2/3/4 will appear in the display.

4. Press the key on the front panel that you wish to program the microphone key.

5. Release the microphone key.

To release the programming reset the VFO.

(saSffflSs issBBRBs ibbBBBBs^

iBBni I I

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 of the selected band to check the band for a clear frequency. This will function even if you are operating in the CTCSS decode mode. MONITOR programming

Turn on

Press and hold MR key............................... PF2

MR key.............................. PF3

MR key.............................. PF4

(Dl750key (European version) The transceiver will transmitt with 1750 Hz repeater access tone whenever this switch is depressed.

►Microphone terminal connection

(Front view)

4-1-3. Display Panel

Receive audio for the selected TX band (100mV/l0kn)

Receive Audio Output Band Selection (RD) connector

The RD terminal will supply an audio signal during receive on the same band that has been selected for

transmit. Press the F key for longer than 1 second, and

then press the CONT SEL key for the desired band. An indicator will appear in the frequency display of the selected band.

-----

lOHS

Receive Audio output display The 100 kHz dot in the band lights

L, rr n n o

Wl /.u u u

(9>

—+

)REV

®CTCSS

)DTSS

)CO

/1 o o ^ c

LLCfO U.U:U.U

^Bgr

BU SY

SSRF—1 — B — a

(ij)

IlllllllllllllrS^

Indicates the TX band. Displays the selected transmitter offset direction. On when the Reverse function has been activated. With the optional CTCSS unit TSU-7: On when the Tone Decode function is active. On when the Tone Encode function is active.

With optional DTU-2

On when the DTSS function is active.

On when Carrier Operated scan is selected. On when the Tone Alert function is active.

L,M

—+

REV

CTCSS CO

DTSS ^

SO.

— +

REV

CTCSS CO

DTSS ^

Ts 8.8:8.8s Шв88:8.8.1 !Ts 88:8.8.

88 'Ш“!!1Ч“Ч!Ш SI 88 |ИРдаччч<Ш SI *88 в»'Ш!Ш|Ш! SI

^188 Displays the operating frequency to the ®

nearest kHz digit, or the tone frequency. f-------1—

• The indicator flashes when scanning.

■ On when receive detection output is fixed in the band. © ni^

*B 8

L M

On whenever the F key has been OFF depressed. © SLEEP Shows the last memory channel number that was selected. The ★ indicator is on © LOCK

when the Memory channel will be skipped during Memory channel scan. A,LOCK On in paging mode.

-On when the squelch opens. @ apo This level meter indicates the relative receiver signal strength or the relative @ TOT transmitter power output.

On during transmit. @ д.В.С. Indicates the relative output power setting for transmit. No indicator @> MUTE

indicates full power.

■4ЕШ^

CTCSS CO m ON

Чжг

_ A.LOC C AP

J TOT

A.B.C MUTE

1200MHz band only; On when the Automatic

-Lock Tuning function is active.

28/50 MHz band only; On when Attenuator is

on. On when the TIME ON/OFF function has been activated. On when the SLEEP TIMER function has been activated. On when the Lock function has been

activated. On when the All Lock function has been

activated. On when the Automatic Power Off

function has been activated. On when the Time-Out Timer function

has been activated.

On when the Automatic Band Change function has been activated. On when the volume of the RX band is reduced.

4-1-4. Rear Panel and Side Case

144MHz.

■ 144MHz

TM-741A/741E-

440/430MHZ

TM-641A

220MHz

(DANTENNA connector Attach an antenna with a low SWR and impedance of 50 ohms. (2) 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. (DFuse holder Contains a 15A fuse. Do not use a larger fuse as damage might result to the transceiver. (3) External speaker jack (Rear panel) The speaker should have an impedance of 8 ohms. The audio is switched to the external speaker (no sound is output from the built-in transceiver speaker).

■TM-741A/741E 440/430MHZ

TM-641A

220MHz

Example

144MHz band

(5)External speaker jack (Side case) The speaker should have an impedance of 8 ohms. The audio is switched from the built-in transceiver speaker to the external speaker (no sound is output from the built-in transceiver speaker).

Example

We recommend the use of the optional external speaker

SP-50B.

Fig.l

2. Turn on the Power Supply, then turn on the transceiver’s POWER switch. The display should light after 1 second. Fig.l shows examples of frequencies that will appear on the various models. 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 microprocessor. ( Memory Initialization on page 29 )

Perform the following steps for each band.

so that the operating band indicator lights (green).

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.

5. 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.

6. 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.

7. Turn off the transceiver’s Power switch before you turn off the power supply, or in a vehicle, before you stop the engine.

4-2-2. Frequency Selection

You can change the dial frequency while in the VFO mode. The frequency can also be stored in memory, or in the call channel.

1. Press the VFO key to select the VFO mode.

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

Mode selection

You can select the VFO mode. Memory channel mode, or Call channel mode using the following keys.

1. Press the VFO key to select the VFO mode.

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

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

4. Rotate the Tuning control or press the microphone UP/DWN keys until the desired tuning step size appears in the display.

CS)

tons

,1,. n o n n

GE)

step Size [kHz]

5^10^15?i20?=i12.5=i25i*

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

4-2-3. Frequency Step Selection

T0 select the desired tuning or scan step size use the following procedure:

The chart below illustrates the way the displayed frequency will change when you change from one step size to another.

5,10,15,20 to 12.5,25

0,5,10,15 0 20,25,30,35 25 40,45,50,55 50

60,65,70,75,

80,85,90,95

12.5,25 to 5,10,15,20 0

12.5 25

37.5 50

62.5 60 75

87.5

0 10 20 30 50

70 80

For example: Assume you are presently displaying a frequency of

439.920 MHz and had previously selected a 20 kHz step size. If you were to change the step size to 12.5 kHz the display would then read 439.925 MHz.

1. Press the VFO key to select the VFO mode. Rotate the Tuning control until the desired lower

tuning range appears on the frequency display.

For example, you might want to select the 438 MHz

band and dial up 438.100 MHz.

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

the CALL key.

more than

1 sec

Rotate the Tuning control until the desired upper

/¿7VS

^unnn inn

iW i.uuu '<30. luu

tuning range appears on the frequency display.

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

4-2-4. Programmable VFO Tuning Limits

The radio provides the capability of programming the VFO tuning range, in 1 MHz band segments, as well a providing a separate programmable band scan function. (See section 4-5.) For example, you could tell the transceiver that you only wish to tune the 438.000 MHz and 439.000 MHz band segment by specifying any frequency with these two segments. The Tuning controls would then only tune within these specific bands. The procedure for specifying the bands is described below.

dj r

lore than

1 sec

(^3HIFT^

To confirm that the programming was properly

5. performed rotate the Tuning control. The transceiver should not go above or below the programmed band limits.

IriuC ^unnn mn

lu iD H I.UUU '<30. luu

To clear both programmed limits simultaneously, turn the Power off ,then;

ALL BAND mode

Press and hold the VFO key, then turn the Power switch on (VFO RESET See page 30).

INDIVIDUAL BAND mode

2. As soon as a signal is received on any band, the TX circuit will become active on that band.

(

lOHS

,^unnn ff^.nnnn I'il.UUU Wu.uuu

Press and hold the VFO key and the BAND SEL key for the band you want to clear, then turn the Power

switch on. You can reprogram either limit independently by fol lowing the appropriate instructions above.

4-2-5. A.B.C.(Automatic Band Change)

The A.B.C function allows you to exchange the RX band to the TX band automatically whenever a signal is received and the squelch is open.

1. Press the F key and then press the MUTE/ABC key.

The A.B.C. indicator will light on the display.

(Jj

A.B.C.

(^MUTE^

lUlD IHi.uuu 'iHu.uuu

'^ .un nn .,.,nnnn

3. If you press the PTT switch,

The A.B.C. function will be released. The band remains TX band.

If the PTT switch is not pressed,

Within 2 seconds after the signal goes off, the band will be returned to RX band.

If you press the BAND SEL key.

The A.B.C function will be released.

4-2-6. Band Selection

1. Press the F key for longer than 1 second. The F indicator will begin to flash. Press the BAND SEL key for the bands you wish to turn on/off. A Calender will be displayed.

4-2-7. Attenuator ON/OFF

(Requires optional BAND UNIT UT-28S or UT-50S) When the incoming signal is very strong, the signal

should be attenuated to prevent distortion of the signal, thereby stabilizing the receiver performance.

more than 1 second

I nu c ‘^unnn

lUTJ I’^l.UUU

123

2. Press the BAND SEL key again. When turning off a band an “off“ will be displayed in the display for approximately 10 seconds then the appropriate band display will come back.

10:33

i033

'^unnn

13 n.uuu

unnn

13 l.UUU

-OFF-

3. To retern to the previous display press the F key for longer than 1 second then press the BAND SEL key.

It is possible to turn off all three bands. In this case no frequencies will be displayed.

1. Press the CONT SEL key or the BAND SEL key for the 28/50MHz band.

2. Pressing the F key momentarily then pressing the

DTSS key will toggle the ATTENUATOR function on or off. The attenuator indicator will turn on when the function is active.

Attenuator indicator

----------

-I o c o n

d Ji.JiQU

BUSY

SS RF —1

lllllllllllllll

4-2-8. ALT (Automatic Lock Tuning)

(Requires optional BAND UNIT UT-1200 ) 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.

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

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

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 is higher or lower than the displayed

frequency.

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

—-

.... nnnn

'iHu.uuu

nnnn

IPHu.uuu

—

(^DTSS^

To release the ALT function press the F key momentarily, then press the DTSS/ALT key again.

----

unnn

l'^ l.UUU

---

ALT

Turns on when the transmit frequency of the distant station is lower than your receive frequency.

4-3. TRANSMITTER OPERATION

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

4-3-1. Transmission

CAUTIONS

1. Ensure that an antenna with a low standing wave ratio (less than 1.5 SWR) is attached to the

antenna connector before attempting to transmit. Failure to provide proper termination may result

NOTE Talking closer may result in over deviation of your transmit signal, which might be reported as a loss of clarity or an excessively wide transmit signal. Talking too far away may result in reports of weak audio.

in damage to the final amplifier section.

2. High-power and extended transmission increases the unit temperature.

NOTE

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

Release the PTT switch to return to the receive mode.

5. The ON AIR indicator should go out, and the RF meter will return to zero. Simultaneous reception on the other bands is possible during transmit.

1. Press the BAND SEE key for the desired transmission band. The PTT indicator will light for the corresponding band. Bands in which the PTT indicator are not lit are used for reception only.

NOTE Some combination of transmit and receive frequencies

might cause a reduction in receiver sensitivity.

(Example; 440 MHz band)

triuc ,„L/nnn ’^nnnn

lUlD IHi.uuu H'iu.uuu

4-3-2. TX. Alert

2. Select the desired operating frequency .

3. Press the PTT switch. The ON AIR indicator will

light, and the RF meter will light.

Different beeps can be heard for each band by pressing the PTT switch. These signal which band you are transmitting on. Press the PTT switch while pressing the F key. The TX alert function is then turned on or off.

4-3-3. Time-Out Timer (TOT)

The transceiver has a time-out timer function to prevent possible problems caused by continuous transmission. This function forcibly stops continuous transmission after a certain time. The time-out time is 3, 5,10, 20, or 30 minutes or OFF (no limit).

1. Press the F key for longer than 1 second.

2. The F indicator will begin to flash. Press the LOW key. The current Time-out time is displayed.(For

example 30)

4-3-4. Bandwidth Selection

(Requires optional band unit UT-28) You can select WIDE or NARROW bandwidth only

when transmitting in the 28MHz band. Press and hold the F key and the LOW key, then turn

the POWER switch ON. This will toggle between WIDE and NARROW. When NARROW is selected “n“ will display at the head of the frequency display.

(Ю

more than 1 second

LOW^

3. Select the desired time-out time by rotating the

tuning control. The TOT indicator will light. (If the time-out time is set to OFF, the TOT indicator will not light.)

4. Press the LOW key. The time-out timer is now on.

A beep sounds when the time-out timer times out during transmission. The receive state is then re-entered. Press the PTT switch to resume transmission.

^ C Л Л П

I4D.UUU

NARROW indicator

-i О C П П

nc'O.^UU

BUSY

SS RF —1

lllllllllllfll

4-4. MEMORY

4-4-1. Microprocessor Memory Back-up

A lithium battery is contained in this transceiver fo retain memory. Turning off the POWER switch, disconnecting the power cable or an intermittent power failure will not erase the memories. The battery life is estimated at 5 years. When the battery has been exhausted erroneous information might appear in the display. Lithium battery replacement should be performed by an authorized KENWOOD service facility, or your authorized KENWOOD dealer. This equipment contains CMOS circuitry and can be damaged by improper replacement procedures.

4-4-2. Microprocessor Initialization

VFO, Call channel and

Memory channel

1 frequency

Frequency step

Tone frequency

144MHz

144.0(X)MHz220.000MHz

5kHz

88.5Hz

220MHz

20kHz

88.5Hz 88.5Hz

440/430MHZ

440.000MHz

430.000MHz 25kHz

RESET

The transceiver provides Memory reset and VFO reset for each band independently or all bands simultaneously.

NOTES

1. Do not stop resetting halfway.

2. If the display should show erroneous information after initialization you should reset again.

MEMORY RESET

All user programmed data will be initialized.

ALL BAND mode

1. Turn the Power switch off.

2. Press and hold the MR key and turn on the POWER switch. After 1 second all the LCD indicators will light.

3. Release the MR key. A PTT indicator will flash three times.

INDIVIDUAL BAND mode

1. Turn the Power switch off.

2. Press and hold the F key and the BAND SEL key for the band, then turn on the POWER switch. After 1 second all the LCD indicators for the band will light.

3. Release both keys. The PTT indicator for the band will flash three times.

VFO RESET

The microprocessor’s VFO memory (without memory channels 1~100, CALL channel, and paging memory channel) will be initialized.

ALL BAND mode

1. Turn the Power switch off.

2. Press and hold the VFO key and turn on the POWER switch.

3. Release the VFO key.

INDIVIDUAL BAND mode

1. Turn the Power switch off.

2. Press and hold the VFO key and the BAND SEL key for the band, then turn on the POWER switch.

3. Release both keys.

4-4-3. Memory Channels

The transceiver has 100 memory channels for each

band. The memories are divided into five banks of 20

sis in each.(See Memory Banks

Page 32)

4-4-4. Memory Contents

Each Memory channel is capable of storing the following information:

Normal

channel RX Frequency TX Frequency(^) Tone (CTCSS) Frequency

(With the optional CTCSS unit TSU-7)

Tone (CTCSS) status Frequency step Shift status (ssi) REV status (^) DTSS code ,DTSS status Last operation paging memory

number (With the optional unit DTU-2)

O: Can be stored in Memory.

NA: Cannot be stored in Memory.

(«) When a separate TX frequency is entered in a

memory, the shift state and reverse on/off programming is removed from the memory.

o o

o o o o

Odd Split

channel

o o

NA NA

O o

BANK BANK 2 : BANK 3 : CH 41 BANK 4 : BANK

1 : CH 1

CH 21 CH 61

5 : CH 81

— 20

-40 — 60

-80

— 100

4-4-5. Memory Entry

1. Press the VFO key to select the VFO mode.

2. Select the desired receiver frequency, tone information etc. (For example 443.600MHz)

3. Press the F key momentarily. The F indicator will

light on the display, and a memory channel number

will appear.

,.,u n nn ° ^D cn n

lOHS

IH 1. UU U H HJ .bu u

______

®S3

.........

4. Select any memory channel using the Tuning control or microphone UP/DWN keys. (For example: CHS)

,„u n nn

lO H S

IHn.UUU '^'^J.UUU

___

® s

____

•Normal channel

Press the MR key within 10 seconds of selecting the memory channel number. The F indicator and memory channel number will turn off. This signals

that the data has been properly stored in memory.

•Odd Split memory channel (continue from

step 4) Press the MR key for longer than 1 second within 10 seconds of selecting the memory channel number. The — + indicator indicates the TX frequency selection mode.

_ ^

¡OHS

lu Un nn ^ D Cn n

H n.u uu H H j.b uu

___

® s

____

6. TX frequency entry

Select the desired transmit frequency. (For example 442.600MHz)

lO H S

Press the MR key.

7. To confirm the contents of the odd split memory channel: Press the MR key. The programmed receiver frequency should appear in the display along with both a “ —” and “ + ” offset direction indicator. This signals you that this channel has an odd split entered.

I^ un nn '^ pc nn l^ i.u uu H 'iC .b uu

....

. ® s

____

4-4-7. Memory Banks

’

I0 H5

,.,unnn

IHi.uuu

9. To check the transmit frequency press the REV key. The transmit frequency will appear in the display.

#Call Channel

1. Press the VFO key to select the VFO mode.

2. Select the desired Call channel frequency, tone data, etc.

3. Press the F key momentarily. The F indicator will light and the memory channel indicator will light.

4. Press the CALL key within 10 seconds of pressing the F key to enter the data into memory. A long beep will sound and the F indicator and memory channel indicators will turn off to confirm data entry.

4-4-6. Memory Channel Recall

1. Press the MR key to select the memory mode. The last memory channel will light on the display.

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

•Memory Bank link

Adjacent banks may be linked and used as one large bank. All banks can be linked.

Example

Banks 1 + 2 Channels (1 to 20)+ (21 to 40) Bank 3 Channels 41 to 60 Banks 4 + 5 Channels (61 to 80)+ (81 to 100)

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

2. Display the highest channel number (20, 40, 60, or

80) of the desired bank using the tuning control or microphone UP/DWN keys.

BA N K 1

•• •• 1 8. 19 . 2 0

BA N K 2

21 . 2 2. 23 .-- --

3. Press the band CONT SEL key for linking with the

high-order bank.

, ,unnn ™ D lun

IDHS

I'ii.uuu H'iJ. iiu

---------

i'i

---------------

•Separating linked memory banks

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

2. Display the least significant channel (21, 41, 61, or

81) of a high-order bank using the tuning control or microphone UP/DWN keys. (Example: When bank 1 is separated from bank 2.)

Number 14 indicates the previous

memory channel.

iLink status check

1. Press the CONT SEL key to select the desired operating band.

2. Press the MR key to enter the memory channel mode.

3. Press the TONE key while pressing the F key. The

bank status will then be displayed.

4. Turn the tuning control or press the microphone UP/DWN keys to review the band link status. Example Banks 1 and 2, and 4 and 5 are linked.

Banks 1 and 2 are linked. Banks 4 and 5 are linked.

5. Wait for ten seconds or press any of the front panel key to return to the normal frequency display mode.

BA N K 1

•• •• 1 8. 19 . 2 0 2 1. 22 . 2 3.- -- -

,^unnn ^nnnn

lOHS

¡Hi.uuu HHu.uuu

____

BA N K 2

_____________

2U 4U 61, or 81

3. Press the band CONT SEL key to separate from the banks.

lans

i.iUnnn “???;n lun

n.uuu H'^U. inu

IH . .

Number 14 indicates the previous

memory channel.

•Memory Consolidation

It is possible to rearrange the memory channels on the transceiver to optimize memory scan operations. This is

an advantage especially if there are a large number of

open channels separating those channels that actually contain data. Memory Consolidation causes the active memory channels to be rewritten sequencially from the lowest channel without any blank channels in between. The accompanying diagram illustrates this function.

Press and hold the F key and then press the LOW key. A beep will sound to signal that consolidation has taken place. The display will change to show the total number of active memory channels after consolidation. Example 15 channels are memorized in bank 3.

For Example

Data is currently stored in memory channels 1, 5, 8, 12,15,19, and 20. BEFORE CONSOLIDATION

BANK 1

1^ • • • *5^ • • *8^

......

12^ • • *15^ • •

•••19. 20

AFTER CONSOLIDATION

BANK 1

U 2^ 3^ 4^ 5^ 6^ 7^...........................

1. Press the BAND SEL or CONT SEL key for the band you wish to consolidate.

2. Press the MR key to enter the Memory Channel

Mode.

3. Select any memory channel within the bank you wish

to consolidate.

(ID

Press and hold

LOW )

\SEL

QJ!

1 i

llllllllll

5. To check consolidation on the other banks you can rotate the tuning control, or step thru the memory banks with the microphone UP/DWN switches. The S-meter will show a relative indication of the memory

channel usage for the bank, as shown in the

accompanying diagram.

6. To return to the normal frequency display you can wait 10 seconds or press any front panel key.

4-4-8. Clearing Memory

•Clearing a memory channel

1. Select the channel that you wish to clear.

2. Simultaneously press the F key and the MR key.

3. The memory channel will be cleared and the display will indicate the next active memory channel.

•Clearing an entire memory bank

1. Select any channel in the bank that you wish to clear.

2. Simultaneously press the F key and the BAND SEL key.

3. All channels in the selected bank will be cleared. The next active memory channel will be displayed.

NOTES

1. Memory channel 1 cannot be cleared by either the two methods described above.

2. Only the currently displayed bank is cleared during bank link.

4-4-9. Memory Shift

Using this function you can copy the contents of a memory channel or call channel to the VFO without changing the data in memory. This will allow you to begin tuning at the point specified by the memory channel data.

1. Select the desired Memory Channel. (For example Ch. 5)

2. Press the F key.

Cij

1033

3. Within 10 seconds of pressing the F key press the VFO key to copy the data.

VFO

!0HS i^HDOO Th3.3PD

IHH.U33 T^3.3d3

4-5. SCAN

Each band can be scanned independently. For proper scan operation the squelch must be adjusted to the threshold point. Scan can not be used in conjunction with the Tone Alert function.

Auto Memory Scan

Scans the band scan range. A station that receives a signal for longer than a second at the time is

memorized in an empty channel in bank 5.

4-5-1. Scan Options

The following scan options are available:

Band Scan

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

Programmable Band Scan

The scan range in this mode is specified in memory .

MHz Scan

Scans over a 1 MHz range.

Memory Scan

Scan proceeds through those memory channels in a band or bank that have data stored and have not been locked out. This function operates in the memory mode only.

CALL / VFO Scan

Alternate scanning of the call channel and the VFO.

CALL / Memojy Scan

Alternate scanning of the call channel and the memory channel that was last used.

V/M/C (VFO/Memory/Call) Scan

Scans the VFO, the memory channel last used, and the call channel.

4-5-2. Hold / Resume Programming

Two types of scan hold/resume have been provided in this transceiver. The scan hold/resume can be set for each band.

Time Operated Scan (TO)

In this mode the radio stops on a busy channel, remains there approximately 5 seconds, and then continues to scan even if the signal is still present.

Carrier Operated Scan (CO)

In this mode the radio will stop scanning on a busy channel and remain there until the signal drops out. The radio allows a 2 second delay before it resumes scanning so that you don’t lose the station when operators change.

NOTES

1. When the CTCSS is operating, scan will stop only on a signal which contains the proper CTCSS tone.

2. With the DTSS is operation, scan will stop (with

squelch turned off) whenever it receives a signal.

Squelch will not open, however, until the proper

DTSS signal is received.

NOTE With both the CTCSS and the DTSS are turned on scanning will stop when the proper CTCSS tone is received. Squelch will open only if the DTSS signal matches when scan stops.

The radio is delivered from the factory in the Time Operated Scan mode. To switch between the modes use the following procedure.

•Hold/Resume selection

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

2. While the indicator is flashing press the VFO key. This will toggle the Hold / Resume mode to the Carrier Operated mode and the CO indicator will light.

3. To return to Time Operated mode repeat steps 1 and

4-5-3. Band Scan

1. Adjust the SQL control of the band to the threshold point.

2. Hold down the CONT SEL key for longer than a second (for the VFO mode). (The operating band changes at the same time.)

3. The MHz indicator and CONT SEL indicators will begin blinking, and scan will begin.

4. Scan will begin in an upwards direction. You can reverse the direction of scan by turning the Tuning control or pressing the microphone UP/DWN keys.The tuning step size depends upon the current Frequency Step selection.

5. Scan will stop on a busy channel, i.e. a station that is strong enough to open the squelch and turn on the BUSY indicator.

6. Press the microphone PTT switch or any other key (except CONT SEL and BAND SEL). The operating band scan will then stop.

Turns the operation band scan on or off.

of scan.

You scan all two bands at the same time by repeating step 1 to 6 for the other band. Scan will stop only on the band(s) that receive a signal. The other band(s) will continue to scan.

Turns the current band scan on or off. (Blinks during scanning)

4-5-4. Programmable Band Scan

The lower- and upper-limit frequencies of a program scan are set in advance for each band.

•Lower and the Upper Scan Limits Entry

Display the lower frequency limit, press and hold the F key then press the VFO key. Display the upper frequency limit, press and hold the F key then press the MHz key.

•Operation

1. Adjust the SQL control to the threshold point.

2. Select a frequency between the two programmed scan limits.

3. Press the VFO key for longer than 1 second. The MHz indicator will begin flashing as a visual reminder the transceiver is scanning.

NOTE When the current frequency step is different from the upper or lower limit frequency step, the frequencies are scanned from the lower limit and the step depends on that of the lower frequency limit.

Continue to 4-5-3 step 4.

4-5-5. MHz Scan

1. Adjust the SQL control to the threshold point.

2. Press the MHz key during band scan or programmable band scan. The MHz indicator will begin flashing as a visual reminder the transceiver is MHz scanning.

3. Scanning will start in an upwards direction over a 1 MHz range.

Continue to 4-5-3 step 3

4-5-6. Memory Channel Scan

NOTE

1. Only those memory channels that have data entered, and that have not been locked out it will be scanned.

2. Scan does not start unless there are 2 channels that have data entered.

The memory in a band and bank can be scanned.

1. Adjust the SQL control to the threshold point.

2. •Memory scan in band

Press the CONT SEL key or the BAND SEL key of the band to change the operating band. Press the MR key for longer than 1 second to initiate

memory scan of the band.

•Memory scan in bank

When the band is in the memory channel mode press the CONT SEL key for longer than 1 second to initiate memory bank scan.(The operation band changes at the same time.)

Continue to 4-5-3 step 4.

4-5-7. CALL Scan

CALL / VFO Scan

Press the CALL key for longer than 1 second in the VFO

mode to start alternate scanning of the VFO frequency

shown on the display and the call channel.

CALL / Memory Channel Scan

Press the CALL key for longer than 1 second in the memory channel mode to start alternate scanning of the call channel and the memory channel that was last used.

4-5-8. V/M/C (VFO/Memory/Call) Scan

In the CALL channel mode press the CONT SEL key for longer than 1 second to scan the VFO frequency shown

on the display, the memory channel that was last used

and the call channel in turn.

4-5-9. Automatic Memory Scan

This function will cause the transceiver to begin a search for active channels. When it acquires a signal that lasts for at least one second it will sequentially write the data into open memory bank number 5 channels as illustrated in the accompanying diagram.

3. Release both keys. The transceiver will beep each time it enters a frequency into memory. Scanning will stop once it has entered a frequency into all of the open (bank 5) memory channel positions.

Bank 5 memory status

before auto memory scan

1. Press and hold the F key.

2. Then press the CONT SEL key for the band you want

to scan. A beep will sound and the radio will begin scanning.

4-5-10. Memory Channel Lockout

This function allows you to specify which memory channels you wish to skip during memory channel scan.

1. Press the MR key to select the memory channel mode.

2. Select the memory channel that you wish to skip by turning the Tuning control or pressing the

microphone UP/DWN keys.

3. Press the F key for longer than 1 second. The F indicator will begin to flash. Within 10 seconds of pressing the F key press the MR key. A ★ indicator will appear to the left of the memory channel number. This indicates the memory channel will be skipped during the memory channel scan mode.

($)

1 sec

’

¡O H S

i^un nn ^ 5 lun

iW i.uuu HHJ. iiu

* IH

-----

Repeat steps 2 and 3 to lock out any other channels you wish to skip. To cancel the lockout, select the desired memory channel as described in steps 1, 2 and 3 above. A ★ indicator should appear to the left of the memory channel number. Press the F key for longer than 1 second and then press the MR key. The ★ indicator should turn off.

---

------------------------

Demonstration mode

The microprocessor has been programmed to provide a short demonstration of the capabilities of the transceiver. To activate this demonstration press and hold the CALL key while you turn on the power switch. After a 10 seconds delay the transceiver will enter the demonstration mode.

You can cancel this function by holding the VFO key down while you turn on the power.

Press and hold

(^CALL^

foJoi/ HobbiJ

POWER (C

NOTE When you cancel the demonstration mode you will clear all VFO information, and reset the VFO’s to the factory defaults. You won’t erase your memory channel data, just the VFO data, so you might wish

to store your VFO data into memory before entering

the demonstration mode so this information can be

easely recalled.

---

))

4-6. REPEATER OPERATION

4-6-1. Transmitter Offset

All amateur radio repeaters use a separate receive and transmit frequency. The receive frequency may be above or below the transmit frequency. The configuration of most repeaters fall into one of the categories listed below:

-I-

—

144 MHz

band

-f600 kHz —600 kHz

— — —

220 MHz

band

-fl.6 MHz

-1.6 MHz

TM-741A

440/430 MHj

band

-b5MHz + 1.6 MHz

-5 MHz -1.6 MHz

TM-741E

430 MHz

band

-7.6 MHz

• Offset Direction

To select the desired transmitter offset direction press the SHIFT key. Each time you press the key the transceiver advances from one direction to the other, i.e.

“ + ” to “ —” ” to “

------

” with European versions or

1200 MHz band) to no offset (simplex).

• Automatic Offset (U.S.A., and Canada versions)

The TM-641A/741A has been programmed according to the standard ARRL (Amateur Radio Relay League) Band Plan with regard to transmitter offset direction. See the accompanying chart for additional information about this programming. You can, of course, override this by using the SHIFT key if desired.

145.1 145.5 146.0 146.4 146.6 147.0 147.4 147.6 148.0

—

220.000 223.920 224.995

s + s

—

+ s

—

S: simplex

4-6-2. Reverse Function

Some repeaters use a “Reverse Pair”, i.e. the transmit / receive frequencies are the reverse of other repeaters. For example, repeater A uses 146.000 for a transmit frequency (INPUT) and 146.600 for a receive frequency (OUTPUT). Repeater B might use 146.600 for a transmit frequency and 146.000 for a receive frequency. It would be inconvenient to have to reprogram the transceiver each time you wanted to use these repeaters. The REV key allows you to easily reverse the transmit and receive frequencies. To use the REV function press the REV key. The REV indicator goes on on the display to indicate that you are working a reverse pair. To return to normal press the REV key again. The REV indicator goes 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.

4-6-3. Tone and CTCSS 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 sub-audible tones are sometimes used, 38 different sub-audible frequencies being possible. The CTCSS function has been activated the radio will not open squelch until the proper tone is received.

IN EUROPE AND UNITED KINGDOM 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 switch.

Since this tone is required in Europe and the United Kingdom a 1750 Hz tone encoder is included with models delivered to these countries.

• Tone Frequency Selection Each band can be selected the Tone Frequency independently.

1. Press the F key for longer than 1 second. The F indicator will flash. Press the TONE key. The current tone frequency will show in the display.

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

3. When the desired tone frequency is selected, the previous mode is resumed 10 seconds after selection or when the any front panel key is pressed.

Tone Frequency (Hz)

67.0 82.5 97.4

71.9 85.4

74.4

88.5

77.0

91.5

79.7 94.8

114.8 136.5

100.0 118.8

103.5 123.0

107.2

127.3

131.8

110.9

162.2

141.3

167.9

146.2

173.8

151.4

179.9 218.1

156.7 186.2

192.8

233.6

203.5 241.8

210.7

250.3

225.7

• Tone/CTCSS Operation Press the TONE key and select the desired Tone mode. When the T indicator appears in the display the transmitter will transmit the desired tone. Tone signals can be transmitted. 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. the squelch will not open until the proper 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. Set TONE to OFF for transmission with a repeater or transmission without tone squelch (CTCSS).

No indicator

-► T

CTCSS

4-6-4. Autopatch Operations (U.s.a. version 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-45DM optional microphone provides the normal keys you would have on your telephone at home, in addition to the normal 12 keys that are found on your telephone as well as 4 additional

keys, A, B, C and D. These keys are required by some repeater systems for various control operator of your repeater to determine if their use is required. A chart is

provided that lists the various tone frequencies that are generated by the keypad. (Fig.l)

To activate the keypad:

1. Press and hold the PTT switch.

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 sequence to activate the autopatch function. You should check with your control operator for this sequence.

(Hz)

1209 1336 1477 1633 697 770 852 7 8 9 941

1 2 4

5 6 B

C D

4-7. DTSS (Dual Tone Squelch System)

(Requires optional DTU-2)

This function allows the 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 the 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, the squelch is turned off until a matching code is received.

NOTE This function is not available in some areas.

---------

ID4S

С5Т«Я

^unnn

¡4 Tu и и

^^nnnn

ЧЧи .ии и

....—

4-7-1. DTSS Code

DTSS codes from 000 through 999 can be selected from the VFO mode and stored in memory channels and CALL channel. The initial setting of the DTSS Code is 000.

4-7-2. DTSS Code Selection

1. Press the DTSS key 1 or 2 times until DTSS appears in the display.

OFF

Press the F key for longer than 1 second and then press the DTSS key. The display will change to the

DTSS code entry mode. (See example below.) The digit just to the right of the “C“ will be flashing.

_____

more than 1

second

(^DTSS^

Select any digit from 0-9 by rotating the Tuning

control, or by pressing the UP/DWN switches on the

microphone, then press the DTSS key. (Or press the desired digit on the microphone keypad.)

4. After you select the first digit a beep will sound and the middle digit will begin flashing. Select the desired digit by using any of the methods described above.

Select the final digit as described above. After the last digit has been entered the display will return to the normal frequency mode, indicating the tone selection process has been successfully completed.

DTSS ON

__________________________

.\ I /Лти.

■ C ni7n

L-UpU

'/\<T

Paging ON

^^nnnn

ЧЧи .иии

NOTES

1. If a key other than the DTSS key 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.

4-7-3. Using the DTSS function

1. Adjust the SQL control to the threshold point.

2. Press the DTSS key 1 or 2 times until the DTSS indicator appears in the display.

3. The squelch will now remain closed until the correct

code group is received.

4. When the PTT switch is pressed on the microphone

the selected code group will be transmitted. It will take about 1/2 second to transmit the 3 tones. The microphone will be muted while the tones are being transmitted.

5. To cancel DTSS operation press the DTSS key until

the DTSS indicator turns off.

4-7-4. Using DTSS with a Repeater

The DTSS signal is not transmitted immediately after you press the PTT switch. A programmable delay time has been incorporated to allow the DTSS signal to be passed by repeaters with slow response times. You can select a delay time of 250 mS, 450 mS, 750 mS, 850 mS, or 1 second.

When operating simplex mode the 250mS will automatically be selected for you. No other choice is available in this mode, even though you may have selected a different delay. In modes other than simplex you may select between the remaining delay periods (450 mS, 750 mS, 850 mS, or 1 second).

NOTE 250mS cannot be selected for offset modes.

To select desired delay time :

1. Press and hold the F key, then press the DTSS key. The display will indicate the current delay ( 250mS is not displayed).

Press and hold _

CS)

(^□TSS^

L/nnn

.W i.uuu

Rotate the tuning control or press the microphone UP/DWN switches to select the desired delay time. To return to the normal frequency display wait 10

3. seconds for automatic return, or press any key.

PTT ON

-Code

PTT OFF

▼

-Delay time (450mS, 750mS, 850mS, tOOOmS)

4-8 PAGING (Requires optional DTU-2)

The function is useful for net operations or for selectively calling an individual calling.

Example: When member 2 is called

F : 145.660MHz

Simplified operation procedure

Set your individual DTMF code.

Select the desired operating frequency

Enter the paging mode.

Member 1

Member 2

Member 3

Normal operating procedure would require that you make prior arrengements with all members of the group/net, so that all interested parties know which DTMF code will be used for individual/group calls, and that everyone knows who uses which individual code. Since the paging system makes use of a 3 digit code (000 thru 999) you could have a very large group and still have extra code groups available. The paging function permits the 3 digit code of the calling station to be displayed in the display to allow easy identification of the calling station.

To call other stations

1) . Select the DTMF code for the distant

station.

2) . Transmit

3) . Make the QSO.

To listen for a call, wait for the squelch to open.

4-8-1. Paging Code Memories

Seven different paging code memories have been priovided.

Paging Code Memory No.

Stores your own station code.

Usage

Automatically stores the calling station’s

code during receive. Can be used to temporarily store the code for the station to be called.

1~5

Stores group codes, and the codes of other stations.

4-8-2. Code Selection

First, program your Individual Code into Memory A for each band.

1. Press the DTSS key until the Paging indicator lights in the display. See the example below.

No indicator

CTCSS

2. Press the F key for longer than 1 second. A beep will sound and the F indicator will begin flashing.While the F indicator is flashing press the DTSS key.

3. The display will change to the Paging Code Memory Channel Selection mode and the Paging Code

Memory Channel indicator will begin flashing. Rotate the tuning control or press the microphone UP/DWN switches to select the desired Paging Code Memory Channel.

4. Press the DTSS key to complete the Paging Code

Memory Channel Selection and enter the Paging

Code Selection mode. The first digit to the right of the

large ”P” will begin flashing.

5. Rotate the tuning control, press the microphone

UP/DWN switches, or press the appropriate key on the microphone keypad to select the first digit of the paging code.

6. Press the DTSS key to enter this digit into memory. The middle digit will then begin flashing.

7. Repeat steps 5 and 6 to complete the programming of this particular paging code. After you enter the final

digit of the code the display will return the Paging Code Selection mode.

8. Select the next Paging Code Memory you wish to program as described in 3-7 above.

9. After you have completed programming the Paging

Code Memory you can return to the normal frequency display by waiting 10 seconds, or by pressing any front panel key except the DTSS key.

Code Setting

? ^DTSS^ ^DTSS^

-1

Tuning control

^ (^DTSS^

/ nu r _ ^^nnnn

iu“j f%,r HHu.uuu

1 n u r n t > t

lunj r' 1 1 1

PR.

Tuning control

______

^^nnnn

RRu.uuu

4-8-3. Code Transmission

Your station ID code should be programmed in Paging Code Memory Channel A.

1. Select the desired operating frequency.

2. Press the DTSS key until the Paging mode indicator appears. (The Paging mode should be active on the other transceiver also!)

3. Press the F key for longer than 1 second and press the DTSS key. The Paging Mode Memory Channel Indicator will begin flashing.

4. Select the desired Paging Code Memory Channel with the tuning control or microphone UP/DWN switches.

/ OH S / R HS BO HR 0.0 00

P indicates the paging mode.

lOHS ""P1B3 rrO.000

______

— ...

_ ____

Tuning control

1 sec

______

(^DTSS^

End of code setting

^ ^DTSs)

. except

^ (^DTSS^

5. Press any key except the DTSS key to return to the frequency display.

6. Press the PTT switch. The selected transmit code will be transmitted along with your station ID code (the one stored in A).

For example, the following groups communicate

with each other.

Predetermined frequency 144.660MHz

Group code

Member 1 Member 2 Member 3 Member 4

Member 1

111

A 0

1 2 3 789 4 444 ★ 5

Member 2

A 222 2 789

Member 3

A 333 3 789

789 Individual code 111 Individual code 222 Individual code 333 Individual code 444

Member 4

A 444 4 789

4-8-4. Paging Code Monitoring

1. Select the desired operating frequency.

2. Press the DTSS key until the Paging Mode indicator appears in the display.

'rHJC ^^nnnn

<S)

lunj IHn.auu HHu.uuu

ev ....

....

P indicates paging mode.

When the proper code is received, your squelch will open and you will hear an alert tone sequence coming from the speaker. The display will indicate the individual or group code of the calling station.

Stand by with individual code

f the calling station transmits your individual call the display will show Paging Mode Memory Channel 0, and will display the ID code of the calling station.

(Example: Frequency: 144.660 MHz, calling station ID

code is 444.)

lOHS

Zero is displayed to indicate your station is being called.

Stand by with group code.

If the calling station transmits the group code, the group code and the Paging Mode Memory Channel Number that contains that code will display. (Example : For member 2, group code 789 is stored in Paging Mode Memory Channel 2.)

This Paging Mode Memory Channel Number is something other than 0 to indicate a group call has been received.

(« : Err will appears in the display if there is a problem

in code identification.) „

indicator

_______

Error

^^nnnn H'iU.UUU

4-8-5. Code Lockout

Codes are locked out only for receive during the Paging Mode. It is possible to temporarily disable Paging Code Memories 1,2,3,4, and 5 during receive. This will allow you to more closely control which individuals, or groups can open your squelch at any given time. Paging Code Memories 0 and A cannot be locked out. Locking out a particular code for receive will not prevent the code from being transmitted, should you select that particular Code Memory.

1. Press the DTSS key until the Paging Mode indicator appears in the display.

2. Press the F key for longer than 1 second and then press the DTSS key.

3. Select the Paging Code Memory Channel number you wish to lock out by using the tuning control or the microphone UP/DWN switches.

4. Press the MR/M key. A ★ will appear to the left of the Paging Code Memory Channel indicator to remind you that you have locked out this code memory for receive.

5. To restore the code memory for receive use repeat steps 1 thru 4 above.

To increase efficiency we recommend cancelling the paging mode after initial calls have been made to

prevent transmitting the Paging Code data each time

the PTT switch is depressed.

inuc ^^nnnn

lunj lOJ VV u.uu u

4-9. TONE ALERT SYSTEM

The Tone Alert function will provide an audible alarm to signal when someone is transmitting on the frequency you are monitoring. Each band can be

selected by the T.ALT function independently, and

different alarm tones are produced for each band.

During the T.ALT function you will not hear voice

communication. When used in conjunction with the

CTCSS function this would allow the transceiver to act

similar to a private pager system!

1. Adjust each 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 in the display.

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

NOTES

1. When using CTCSS the incoming signal must be present for approximately 1 second in order for the T.ALT to function properly.

2. If the DTSS function is used in conjunction with the Tone Alert function. Tone Alert is activated only when the same DTSS signal is received.

3. The tone alert function is not activated when

CTCSS and DTSS signals are on.

4. When a signal is present: The T.ALT indicator will flash.

The transceiver will beep for approximately 5 seconds. The time when the signal is received will be displayed. Up to 99 T.ALT operations are counted on the memory channel display.

^TONE^

• n u c u n n o'*

lUlJ IHn. uuu

nnn

J U U L> “

1 U»-l l-lfl

5. The time display is updated by each new incoming signal.

6. During time display the T.ALT function can be released by pressing any front panel key.

7. The T.ALT function can be released by pressing the F key, then the TONE/T.ALT key again.

NOTES

1. You can hear a transmission when the PF key is pressed while the Tone Alert function is activated with the microphone PF key set to the MONITOR switch. (MONITOR page 17 )

2. The automatic power off function works after 59 hours and 59 minutes plus one minute when it is used with the tone alert function.

Alarm Sound Selection

The transceiver provides three different Alarm sound.

1. Press the CONT SEL key for the band to select the Alert tone.

2. Turn the Power switch off.

3. Press and hold the F key and the SHIFT key then turn the Power switch on. The current Alert sound indicator will light.

Alert sound

indicator

4-10. AUTOMATIC POWER OFF (APO)

This transceiver also provides an Automatic Power off circuit. The circuit action is described below. (Initial state is off.)

1. To turn the APO function on/off, press the F key for longer than 1 second and then press the MHz key .

CS)

luiJ iWtuuu HHu.uuu

(fAHz\

^^nnnn

Low tone

High tone

Melody

4. Rotate the tuning control to select the desired Alert sound.

5. Press any key to return to previous mode.

bELE

bEL3

2. A 5 second audio confirmation alert will sound after 2 hours .59 minutes if no signal has been received and if you have not performed any operation.

1 minute after this alert signal the transceiver will

shut itself off.

3. When the APO operates and the transceiver is shut off, the transceiver can be reactivated by turning the

POWER switch back on.

4-11. DIMMER (DIM)

The intensity of illumination can be set to one of four levels. (D1 thru D4, with D1 being the brightest.)

1. Press the F key, then press the LOW/DIM key while the F indicator lights. The display will show which intensity level is currently in use.

d d

,. . O fl o n

HHu.uuu

Select the desired value (D1 to D4) with the tuning control or the UP/DWN key on the microphone. If, after 10 seconds, no key has been pressed, the displayed level is set and the previous frequency is redisplayed.

4-13. BEEP TONE FREQUENCIES

The number 0 to 9 on the frequency display are assigned the tones shown below. When the DTSS(^) key is pressed, the tone corresponding to the displayed number is output. The tone is stopped by pressing any key or rotating the Tuning control or VOL control.

523.248Hz

5 880.000Hz

4-12. BEEP TONE LEVEL

ADJUSTMENT

The beep can be set to one of eight levels (off to b7).

1. Press the F key for longer than a second, then press the REV key while the F indicator is flashing. The display will show which beep level is currently in use.

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 previous frequency is redisplayed.

more than 1 SEC

¡OHS

b s

^^nnnn

HHu.uuu

GfD

1 587.328Hz 2 3 4

659.248Hz 7

698.464Hz

783.984Hz

6 987.770Hz

1046.496Hz 8 9

1174.656Hz

1318.496Hz

With the optional DTMF unit DTU-2, the DTSS key change to the signaling mode selection key. In this case we recommend to perform the microphone

PF key to program the Tone Representation function.

1. Turn the POWER switch OFF.

2. Press and hold the F key and the DTSS key then turn the POWER switch ON.

3. Release the F key and the DTSS key.

4-14. KEY LOCKS

There are three types of lock function.

® Microphone key lock

When the switch on the rear

of the microphone is set to the LOCK position, all the

microphone keys except the

PTT switch are disabled.

»LOCK

All the panel keys and the Tuning control are disabled. However, the microphone keys work. Press the F key, then press the MHz/LOCK key within 10 seconds. The LOCK indicator lights.

Ca)

• nu c '^.unnn

lunj IHl.UUU

, . , , n n n n LOOK

H'^uuuu

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

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.

LOCK

---

^^.nnnn ..oc. HHu.uuu

POWER (c

1 n u C

lunj IHl.uuu

To release A LOCK, switch the power off while the A.LOCK indicator is on, press and hold the MHz/LOCK key, and switch the power on again. The A LOCK

——

operation cannot be canceled by VFO reset or MR reset.

5. CLOCK 5-1. CURRENT TIME AND DATE

There is a Backup Switch to retain clock memory. If you

set the switch ON ,turning off the POWER switch,

disconnecting the power cable or an intermittent power failure will not erase the clock memories.

5-1-1. Back-up Switch

Before setting the clock Backup Switch must be ON.

Set the MINUTE Rotate the Tuning control (O'

then press the TONE key.

'59) to set the MINUTE,

See page 8 3-1-1. Installing the Microphone and Setting the

clock back-up switch

■BACKUP SWITCH

5-1-2. Setting the Current Time and Date

1. Press and hold the F key and the TONE key, then

turn the Power switch ON to set the clock. Initial setting is 00:00.00’ 1.1.1991

n nn n

RdJ

2. Set the HOUR Rotate the Tuning control (O' then press the TONE key.

uuuu

'23) to set the HOUR,

1 1

1. 1

3 / llllllllllllll

----

Set the YEAR Rotate the Tuning control (00 then press the TONE key.

5. Set the MONTH Rotate the Tuning control (1' then press the TONE key.

6. Set the DAY Rotate the Tuning control (T then press the TONE key.

7. Set a day of the week (LEVEL METER, see illustration above) The segments of the level meter are used to indicate the day of the week. Rotate the Tuning control to set the day of the week ( See accompanying illustration), then press the TONE key. The transceiver will return to previous mode.

Week M T W T F S S

99) to set the YEAR,

'12) to set the MONTH,

'END) to set the DAY,

5-2. OTHER CLOCK FUNCTIONS

The transceiver has the following clock functions, as well as current time and calender display.

1. STOPWATCH

2. TIME ON SWITCH Switches the transceiver ON at a set time every day.

3. TIME OFF SWITCH Switches the transceiver OFF at a set time every day.

4. SLEEP TIMER The transceiver is automatically switched off after a set period.

5-2-1. Current Time, Calender, and

Stopwatch in the Clock Display

Press the following key to turn on or off any of these

functions.

Current time Calender Stopwatch

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

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

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

BAND SEL key CONT SEL key Press and hold the F key then

press the BAND SEL key.

I Stopwatch

Pressing the BAND SEL key will start/stop the stopwatch. Pressing the CONT SEL key will reset the stopwatch to 0:00.

5-2-2 Time-ON/Time-OFF programming

1. In the clock mode, press and hold the F key, then press the CONT SEL key. The ON indicator will flash.

□

dj t CD

I nu c

lunji

■Activating the TIME ON

function

Pressing the F key then the BAND SEL key will turn the TIME ON function ON or OFF when you are in

the time display mode.

■Activating the TIME OFF

function

Pressing the F key then the CONT SEL key will turn the TIME OFF function ON or OFF when you are in the time display mode.

2. Selecting the TIME-ON or TIME-OFF

Within 10 seconds press the MUTE key. The ON indicatoe will turn off then the OFF indicator will flash.

3. HOUR programming

Rotate the Tuning control (0~23) to set the HOUR, then press the TONE key.

4. MINUTE programming

Rotate the Tuning control (0~59) to set the MINUTE, then press the TONE key.The transceiver return to previous mode.

^MUTE^

(^TONE^

5-2-3. Activating the SLEEP Timer

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

key while in the time display mode.

2. Rotate the Tuning control to select

the desired delay period. The range is indicated in the chart below. (minutes)

slOFF"30"60”90"120"Sloff

3. Select the desired range.

4. The previous display mode will be restored 10 seconds

after the selection or when any key is pressed.

5-3 CLOCK POSITION ON THE

FREOUENCY DISPLAY

The transceiver is capable displayed the clock in either the normal clock position or in the frequency display area.

If you have programmed the radio to display two clock functions the display will be configured as shown in the accompanying diagram.

inuc ~>P Q nn ^nnn

I.C J uuUU.UU

3 I

5-3-1. Transceiver Function ON or OFF

The clock can be displayed in a frequency position with the transceiver function either ON or OFF. The CONT

SEL indicator will light to signal the transceiver

function is ON.

5-3-2. Transceiver Function OFF

Press the F key for longer than 1 second, then press the BAND SEL key for a frequency band. The frequency

will turn off and calender will turn on.

©CURRENT TIME

©CALENDER

©STOPWATCH

Ca)

more than

1 sec

/c /c gnnn

O- 10 13 p.u u u

3 1 UHlHIHlIII

WW-

—

123

When the F key is pressed for longer than 1 second, then the BAND SEL key for the last frequency band is pressed, the STOP WATCH will turn on or off.

Each time the F key and then the BAND SEL key for the last frequency band is pressed the STOP WATCH will turn on or off.

CiD

more than

1 sec

icpn „„nnnn

IDLU uuUU.UU -•,23

ummmmlllt ^ j mmiraiH)

•Return to Frequency Display

Press the F key for longer than 1 second then press the BAND SEL key for the band.

5-3-3. Transceiver Function ON

When the F key is pressed, then the BAND SEL key fo a frequency band is pressed, the calender display will turn on or off.

ic- 1C ' ^unn n

ID- lb iWtuuu

_________

1.33

3 1 mniHnlfll

icpn „„nnnn

IJCU uuUU.UU

mmmmrn

1.33

^ j HlltUllMlII

When the band in which the clock has been programmed

is selected, the display will return to the frequency display by TX.

•Return to Frequency Display

Press the F key then the BAND SEL key for the band.

If the clock is displayed while the transceiver is on, no settings ( such as time change and stopwatch start) can be made.

5-3-4. Tri-Bander

Tri-bander with an optional BAND UNIT can be also

change to a three simultaneous CLOCK DISPLAY at

the same time.

5-3-5. Clock Operation in the Frequency Display

6. MAINTENANCE

•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 has

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.

•SERVICE

Should 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. Also include your 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 to diagnose. 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 must accompany the transceiver.

•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. Examine and 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.

No sound from the speaker. No

signal can be received.

No transmitter output.

Weak signal cannot be received. Display is dark. 1. Power voltage is low.

No memory back up.

Clock is wrong.

The display does not change when the tuning control is rotated.

1. Bad power cable or connections.

2. Blown power supply fuse.

1. Squelch is closed.

2. With the TSU-7 : CTCSS is operating.

1. Microphone jack is not plugged in.

2. Poor antenna connection.

Poor antenna connection.

2. DIM had been set too dark.

Backup battery voltage is low.

Backup battery voltage is low. Backup switch is off.

1. The LOCK function is on. ■

2. The ALL LOCK function is on.

1. Check cables and connections.

2. Check for the cause of the blown fuse and replace the fuse.

1. Turn the SQL control counterclockwise.

2. Press the TONE/T.ALT key to turn off the CTCSS.

1. Plug jack in.

2. Connect antenna securely.

Connect antenna securely.

1. Check voltage for 13.8 VDC ± 15 %

2. Press the F key and the LOW/DIM key. See page 52.

See Microprocessor memory backup page 29

Contact the authorized dealer.

See memory backup page 8

1. Press the F key, then press the MHz/LOCK key within 10 seconds.

2. Hold down the MHz/LOCK key, switch the power on, then perform step 1 again.

Some dial frequency relationships may result in internal heterodyne tones being generated by the TM-641A/ 741A/ 741E. This is not a defect. The following formulas may be used to determine if a tone will be present with a particular frequency relationship. If any of the following equations are true, a tone may be generated that is strong enough for you to hear it in the speaker of both bands. These tones can only be generated when more than one band is on at a time:

With the optional FM unit UT-1200; ((1.2GHz operating frequency) — 59.7MHz) x 2 — ((70CM operating frequency) + 21.6MHz) x 5 = 59.7 MHz or ((70CM operating frequency) + 21.6MHz) X 4 — (((1.2GHz operating frequency) — 59.7MHz) /2) x3= 59.7 MHz or ((1.2GHz operating frequency) — 59.7MHz) x 2 — ((70CM operating frequency) + 21.6MHz) x 5 = 21.6 MHz

For TM-741A/741E with the optional FM unit UT-220; or For TM-641A with the optional FM unit UT-440S; ((220MHz operating frequency) — 30.825MHz) X 5 — ((70CM operating frequency) + 21.6MHz) x 2 = 30.825 MHz

With the optional FM unit UT-50S; ((6M operating frequency) T 10.595MHz) X 7 — ((70CM operating frequency) + 21.6MHz) = 21.6 MHz

7. OPTIONAL ACCESSORIES

CTCSS UNIT DTMF UNIT

TSU-7 DTU-2

7-1. ACCESSORIES

MOBILE MOUNT

BRACKET

MB-11

DE'I ACHABLE FRONT PANEL KIT

PG-4K

DETACHABLE FRONT PANEL KIT

PG-4L

MULTI FUNCTION MULTI FUNCTION DC LINE

MICROPHONE MICROPHONE WITH DTMF NOISE FILTER

MC-45/45E MC-45DM/45DMEPG-3G

(E;European version)

MOBILE SPEAKER

SP-41

COMMUNICATIONS SPEAKER

SP-50B

DC POWER SUPPLY

PS-430

DC POWER CABLE

PG-2N

DC POWER SUPPLY

PS-50

BAND UNIT

UT-28S

______ UT-50S UT-220S (u.s.A.oniy) UT-440S (u.s.A.oniy)

UT-1200

MICROPHONE PLUG ADAPTOR

MJ-88

INSTALLING OPTIONAL ACCESSORIES

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

7-2. CTCSS UNIT (TSU-7)

1. Slide the release button on the front panel to the right. Pull the front panel toward you from the right, then remove the whole panel unit. Be careful with the cord connecting the front panel unit to the main unit. (Fig. 1)

2. Remove the backing from the cushion provided with the TSU-7 and attach it to the back of the TSU-7 as shown in Fig. 3.

3. Remove the backing from the other side of the small cushion. (Fig. 3)

4. Insert the CTCSS connector directly into the TSU-7 connector on the PC board, then gently push it down

until it seats. ( Fig. 3)

5. Replace the front panel back, taking care not to trap

the connecting cord. The connecting cord is easier to manage when it is put in the groove on the back of the panel.( Fig. 2)

7-3. DTMF UNIT (DTU-2)

7-3-1. Installation

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

3. Use the cable supplied with the DTU-2 and attach the two connectors to the main unit. (Fig. 3)

4. Attach the DTMF unit to the main unit. ( Fig. 3)

5. Replace the front panel back, taking care not to trap the connecting cord. The connecting cord is easier to manage when it is put in the groove on the back of the panel.(Fig. 2)

(Fig. 3)

■With the optional DTU-2 DTMF unit is installed, the DTSS key functions the signaling mode selection key. We recommend that to perform the microphone PF key to program the Tone Representation function. See page 53 BEEP TONE FREQUENCIES

Within 10 second of pressing the ENTER (PF) key press the desired frequency from the most significant digit. After the least significant digit has been entered the transceiver changes frequency.

7-3-2. Frequency Entry with DTMF

Microphone

With the optional DTMF unit DTU-2, the DTMF microphone! provides direct keyboard frequency entry.

1. Press and hold the F key and the VFO key, then turn

the Power switch on. The MC-45DM microphone PF key will perform the keyboad entry function.

ENTER

^ KENWOOO

_____ ___ ________ ________ _______

©I

TbBbbbs

/flflfl&aa! /flsaaaafW

O' (X)(SKS)®

Press the ENTER (PF) key to select the ENTRY mode. The digits to be entered will change

---------------------------

f M..

•^33.---

Pressing the ENTER key before the frequency is completely entered will cause the remaining digits (—) to return to their previous settings.

Pressing any key other than the ENTER key or

NUMERIC keys before the frequency is completely entered will cause the entire frequency to return to the previous setting. (JK-) DTMF microphone;

Supplied with U.S.A. and Canadian version or

Optional MC-45DM In 12.5 kHz ,or 25 kHz step size direct frequency selection will be completed in the 10 kHz digit. When you enter the following keys for the 10 kHz digit, 1 kHz and 100 Hz digit frequencies are automatically selected from the list below.

10 kHz digit.

' 1 ! 2

3 37.5 4

Frequency

kHz

12.5 25 7

37.5

10 kHz digit.

5 6

8 9

Frequency

kHz

62.5 75

87.5

7-3-3. DTMF Memory

With the optional DTMF unit DTU-2, DTMF telephone numbers can be stored into memory.

■Storing the DTMF codes

1. Press and hold the F key and the CALL key, then turn the POWER switch ON to select the DTMF code entry mode.

C£) (HD

--------------------

POWER (( '¡¡)

■Recalling stored DTMF code in receive mode

1. Press and hold the F key and the CALL key, then turn the POWER switch ON to select the DTMF codes entry mode.

2. Press the MR key on the microphone.

3. Press the numeric key (0~9) that corresponds to the desired DTMF memory channel.

4. The code are displayed as shown.

- lгз

2. Enter the DTMF code on the DTMF code key (up to a maximum of 15 digits).

3. After the DTMF code is entered, press the PF key.

If you enter the wrong number, press the VFO key on the microphone to start again.

4. Press the channel (0 ~ 9) where you want to store the

DTMF code. When the DTMF code is stored to that channel, the DTMF code entry mode reappears on the display.

5. To complete the DTMF code entry mode, press the

PTT switch, UP/DWN key, or any front panel key.

■Making a DTMF Call

1. Press the BAND SEL key to equalize TX band and RX band.

2. Press the PF key while holding the PTT switch down then press the numeric key that corresponds to the desired DTMF memory channel. The DTMF code is output .The display shows the code.

NOTES Transmission continues until the whole code string is recalled even if the PTT switch is released.

7-4. PANEL SEPARATION KIT (PG-4K/4L)

PG-4K

Power Supply

PG-4L

DC Cable (6m) Speaker Cable (5m)

1. Slide the release button on the front panel to the right. Pull the front panel unit toward you from the right, then remove the whole panel unit. Be careful with the cord connecting the front panel unit and the main unit. ( Fig. 1)

( Fig. 1)

Be careful with

this cable.

Remove the holder.

(Fig. 1)

(Fig. 2)

2. Unplug the microphone from the main unit, and remove the black plastic cord holder by pushing up on the front. (Fig. 2)

3. Unplug the front panel cord connected to the transceiver main unit and connect the PG-4K/4L front panel cable to the transceiver.

(Fig. 3)

4. Remove the cover on the front of the PG-4K/4L front panel, and pass the microphone cable and front panel cable through the opening.(Fig.4)

Cord Bush

Fig.4

6. Attach the PG-4K/4L front panel to the transceiver with a binding screw and replace the cover. (Fig.4)

7. Fit the cord bushing on the panel cable into the front panel (Fig.5-D), fix the panel cable, and install the cover. (Fig.4-A)

Connect the microphone to the other connector of the

microphone cable. Attach the connector in any convenient position with a screw.

Slide the small cover off of the front panel unit as shown in the accompaning illustration.(Fig.4-B) Gently lift up on the cable near the grommet to disengage it from the front panel. Then gently pull the cable assembly to left to disconnect the white 4 pin connector. Push the white connector on the PG-4K/4L to right into the front panel socket.

_______________________

NOTE: The key on the connector should be up, as shown.

5. Connect the PG-4K/4L microphone cable to the microphone connector. Push the connectors together until they click. (Fig.4)

Push the grommet down into its slot, and route the cable as desired in the slots on the rear of the front panel. Replace the cover to complete the cabling. (Fig.4-C)

7-5. BRACKET

Loosen the bracket screws and put the two plates at right angles. Attach the front panel unit to the bracket using the three supplied screws. Install the bracket using the supplied flat washers and

•Installation Using Velcro Fastener

NOTE The bracket may come off due to vibration or shock when installed using Velcro. Install the assembly in

a safe position near the console, or storage compart ment (indicated by the lines) to ensure safety.

Peel the backing on the supplied Velcro tape and attach it to the back of the front panel unit. Securely install the front panel in a stable position.

7-6 BAND UNITS

Any of the following optional band units may be installed in the TM-741A/741E. The same instructions apply for the Tri-Bander as for the Dual-bander.

OPTIONAL BAND UNIT

®. Remove the cases.

©Loosen the 4 screws on the top and bottom cover. ©Remove the 4 screws securing the top case. ©Remove the 4 screws securing the bottom case. ©Remove the top and bottom case.

TM-641A TM-741A

U.S.A.version

TM-741A TM-741E

UT-28S UT-50S UT-440S UT-1200

UT-28S UT-50S UT-220S UT-1200

UT-28S UT-50S UT-1200 UT-28S UT-50S UT-1200

7-6-1. Installation

CAUTION

Before installing any band unit be sure to unplug the DC power cable.

TOOLS;

2.6mm Phillips screwdriver

3.0mm Phillips screwdriver

Remove the cooling fan assembly.

Disconnect the conector. Remove the 4 screws securing the fan case. Remove the fan case.

®. Be sure to unplug the dc cable before

removing the terminal plate.

0 Remove the 4 screws

from the both sides of the present 2 units,

d) Remove the plate.

d). Insert the new band unit.

REmove the spacer.

Remove the 2 long screws securing the spacer. Remove the spacer.

0 Insert the new band unit as shown in the

accompaning diagram.

Connector

(6). Tighten the new band unit.

Replace the cooling fan assembly.

® Tighten the 2 side

screws to secure the new band unit in place.

d) Insert the 2 long

screws.

(3) Tighten the 2 long

screws while holding the nuts and lock rings from the opposite side.

(7). Attach the 3 unit terminal plate.

® Insert the 3 unit

terminal plate.

(2) Tighten the 6 screws

from each side of the 3 units.

Align the fan cable with the slot of the rear case.

Replace the cooling fan assembly. Tighten the 4 screws.

Slot

Attach the connector.

Route the cable in the slot of the chasis.

Attach the supplied 2 sheet on the cable.

®. Replace the cases.

QAttach the top and bottom case. ©Tighten the 4 screws to secure the top case. ©Tighten the 4 screws to secure the bottom case. ©Tighten the 4 screws of the both sides.

7-6-2. Notes

7-6-3. Preliminaly arrangement

After installation the following parts will be remained.

Terminal plate 2 screws for bracket

A bracket

If you have some other number of parts or types of parts re-check your

installation BEFORE TURNING the POWER switch ON.

We recommend the use of a DC power supply when checking the following points.

Connect the DC power cable.

Turn the POWER switch ON. If there is no frequency in the display, disconnect the DC power cable immediately. Then check the

following (a,b,and c).

a. Make sure the positive ( + ) and negative (-)

lead polarity is correct when connecting the cable.

b. Check the cable connecting the front panel unit

and the main unit.

c. Check fuse.

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.

_________________________

Only when a frequency display appears about a second after the -ONindicator, proceed with the next step.

3. To activate the optional band unit, reset the memory for the band.

1. Turn the POWER switch OFF.

2. Press and hold the F key and the BAND SEL key for the band, then turn ON the POWER switch. After 1 second all the indicators for the band will light.

7-6-4. Additional Band Unit Functions

Instructions for the Tri-bander are the same as the Instructions for Dual bander.

Optional band unit will add the following functions to the transceiver.

4-2-3. Frequency step selection

’ress and Hold Then turn ON

3. Confirm the indicators, then release the F key and the BAND SEL key. The initial settings will be displayed, the PTT indicator will flash three times, and a beep will sound , then the memory reset will be finished.

The clock can be displayed in a frequency position ( See page 58).

Use conventiona

Step Size [kHz]

28MHz band SOM Hz band 220MHz band

1200.MHZ band

labeling in charts,

10<:± 15^

o o o

o o

o o o

ES,x =

20=^ 12.5^

o o

NO.

X X

O o

o o o

25<=^

o o

4-2-3. Frequency Step Selection

In the 28MHz band and the 50MHz band, the frequency step size will not adjust to it’s original step size.

4-2-4. Programmable VFO Tuning Limits

In 28MHz band, the Programmable VFO Tuning limit is

lOOkHz.

4-2-7.

Attenuator ON/OFF (With the UT-28S/50S)

See page 25.

4-1-1. MHz key (With the UT-28S except

U.S.A. and Canada)

4-2-8.

ALT (Automatic Lock Tuning) (With the UT-1200)

4-3-4. Bandwidth Selection

(With the UT-28S)

4-4-2.

Microprocessor Initialization

band 28MHz

VFO, Call and

Memory channel 1

frequency

Frequency step

Tone frequency 88.5Hz

29.000 MHz

lOkHz

7-6-5. Specifications

Frequency range 28 ~ 29.7 50~54

E R

A L

Mode F3(FM) Antenna impedance son Operating tenperature Power requirements

Ground Negative

Frequency stability

Current drain

The chart below illustrates the way the displayed

See page 26.

frequency will change when you increase or decrease the operating frequency in 1 MHz increment. For ex. 29.6-^28.!•«—(decrease) 29.1 (increase)^28.0

See page 28.

50MHz 1200MHz

51.000 MHz

lOkHz

88.5Hz

Transmit mode

Receiver mode ^ Less than 1.2A

1240.000 MHz

25kHz

88.5Hz

4 - 6 -1. T r ansmitter Offsets

28MHz band 50MHz band

-I-

— -

UT-28S

Less than ±10ppM

Less than 11.5A

+ lOOkHz + lMHz

- lOOkHz

UT-50S

-20°C~+60°C

DC13.8V ± 15%(11.7~15.8V)

-IMHz

Less than ±3ppM

Less than 6.5A

1200MHz band

12MHz

-12MHz

- 20MHz

UT-1200

1240 ~ 1300

UT-28S

T R A N S

T T E R

R E

V E R

Output Powa"

Modulaticn Spurious radiation

Maximum frequency deviation Audio distortion (at 60% modulation) Microphone impedance

Circuitry

Intermediate frequency lst/2nd Sensitivity (12 dB SINAD)

Selectivity —6 dB

Selectivity —60dB Less than 24kHz Squelch sensitivity Output (5% distortion) External speaker impedance

MID low -

LOW

Less than — 60dB(iSi)

8.83MHz

More than lOkHz

SOW

Approx. 5W

Double conversion superheterodyne

Less than 0.16//V(—16dB/i)

Less than 0.1//V(—20dB/i)

More than 2W(8f2 load)

UT-50S

Reactance modulation

Less than — 50dB

±5kHz

Less than 3%

6oon

10.595MHz 455kHz

More than 12kHz

Less than 36kHz

8il

NOTES: l.Circuit and ratings are subject to change without notice, due to developments in

technology.

2.Recommended duty cycle; 1 minute Transmission, 3 minutes Reception.

(^) Hi Power position; Less than — 70dB

UT-1200

low

59.7MHz

Kenwood TM-741A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TM-641A

TM-741A

TM-741A

TM-741E

CONTENTS

1. BEFORE OPERATION To prevent electric shock, fire and other

2. SPECIFICATIONS and ACCESSORIES 2-1. SPECIFICATIONS

2-2. ACCESSORIES

3. INSTALLATION INSTRUCTIONS 3-1. INSTALLATION

■BACKUP SWITCH

3-2-1. Antenna

3-2-3. Fixed Station

Ts 8.8:8.8s Шв88:8.8.1 !Ts 88:8.8.

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4-2-2. Frequency Selection

Mode selection

-I o c o n

4-3. TRANSMITTER OPERATION

4-3-1. Transmission

4-3-2. TX. Alert

4-4. MEMORY

ALL BAND mode

INDIVIDUAL BAND mode

4-4-3. Memory Channels

•Normal channel

6. TX frequency entry

4-4-6. Memory Channel Recall

•Separating linked memory banks

iLink status check

4-4-8. Clearing Memory

•Clearing an entire memory bank

4-5. SCAN

4-5-1. Scan Options

4-5-2. Hold / Resume Programming

4-5-3. Band Scan

•Operation

4-5-5. MHz Scan

4-5-6. Memory Channel Scan

2. •Memory scan in band

•Memory scan in bank

4-5-7. CALL Scan

4-6. REPEATER OPERATION

4-6-1. Transmitter Offset

• Offset Direction

4-6-2. Reverse Function

(Requires optional DTU-2)

4-7-1. DTSS Code

4-7-3. Using the DTSS function

4-7-4. Using DTSS with a Repeater

4-8-2. Code Selection

4-8-4. Paging Code Monitoring

Stand by with individual code

4-8-5. Code Lockout

4-9. TONE ALERT SYSTEM

Alarm Sound Selection

4-10. AUTOMATIC POWER OFF (APO)

bELE

bEL3

4-11. DIMMER (DIM)

4-13. BEEP TONE FREQUENCIES

4-14. KEY LOCKS

5. CLOCK 5-1. CURRENT TIME AND DATE

5-1-1. Back-up Switch

5-1-2. Setting the Current Time and Date

5-2. OTHER CLOCK FUNCTIONS

5-2-1. Current Time, Calender, and

Stopwatch in the Clock Display

I Stopwatch

5-2-2 Time-ON/Time-OFF programming

3. HOUR programming

5-2-3. Activating the SLEEP Timer

5-3-2. Transceiver Function OFF

•Return to Frequency Display

5-3-3. Transceiver Function ON

•Return to Frequency Display

5-3-4. Tri-Bander

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