Kenwood TM-3530A User Manual

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220MHz FM TRANSCEIVER

TM-3530A

144MHz FM TRANSCEIVER

TM-2570A TM-2550A

TM-2550E

TM-2530A

INSTRUCTION MANUAL

KENWOOD CORPORATION

©PRINTED IN JAPAN B50-8039-50 (K,M,T,W) (G)

93/876543 2 1 / 92/ 12 11 10 9 8 7 6 5 4 3

Thank you for purchasing the new TM-3530A/2570A/2550A/2550E/2530A trans

ceiver. Please read this instruction manual carefully before placing your transceiver in service. This unit has been carefully engineered and manufactured to rigid quality stan dards, and should give you satisfactory and dependable operation for many years.

This Instruction Manual covers the following models:

TM-3530A 220 MHz FM transceiver with KENWOOD brand. TM-2570A 144 MHz FM transceiver with KENWOOD brand. TM-2550A 144 MHz FM transceiver with KENWOOD brand. TM-2550E 144 MHz FM transceiver with KENWOOD brand.

(U.K. and Europe version)

TM-2530A 144 MHz FM transceiver with KENWOOD brand.

When there are differences in operation separate instructions will be given for each model. Illustrations show the TM-2550A.

The following explicit definitions apply in this manual:

Note: If disregarded, inconvenience only, no risk of equipment damage or personal

injury.

Caution: Equipment damage may occur, but not personal injury.

1. FEATURES................................................................ 4

2. SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS.............................................. 5

2- 2. ACCESSORIES.............................................. 6

3. INSTALLATION AND CONNECTION........................ 7

3- 1. INSTALLATION

3-1-1. Precautions................................................ 7

3-1 -2. Power supply 3-1-3. Mounting bracket

3- 2. CONNECTION................................................ 8

3-2-1. Precautions................................................ 8

3-2-2. Fixed station............................................... 8

3-2-3. Mobile

A. Wiring on installation on the car

B. Ignition noise

3- 2-4. Antenna

4. OPERATION............................................................ 10

4- 1. CONTROLS AND THEIR FUNCTIONS

4- 1 -1. Front panel............................................10

1. LCD group........................................... 12

2. Keyboard............................................. 13

4-1-2. Rear panel 4-1-3. Microphone

4-2. RECEPTION......................................................... 1 5

4-3. TRANSMISSION

4-3-1. Precautions............................................... 15

4-4. MEMORY

4-4-1. Microprocessor memory back-up 4-4-2. Initial state and reset of

4-4-3. Memory input 4-4-4. Paired channels

4-4-5. Priority channel select............................... 17

4-5. SCAN.................................................................... 1 7

4-5-1. Memory scan from the keyboard 4-5-2. Programmable band-scan from

4-5-3. Scan direction

4-5-4. Scan speed................................................ 18

4-5-5. Scan lockout (Skip).................................... 1 8

4-5-6. Scan release............................................. 18

4-5-7. Priority channel scan (Alert)

4-6. REPEATER

4-6-1. Automatic repeater offset

4-6-2. Tone frequency..........................................20

4-7. AUTOMATIC TELEPHONE NUMBER

TRANSMISSION SYSTEM..............................21

4-7-1. Telephone number programming

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

the microprocessor.................................. 15

A. Initial state of the microprocessor

from the factory

B. Microprocessor reset...........................1 5

the keyboard

1. Setting

2. Release...............................................20

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7 7

9 9

16 16

1 7

19 19

1 8 18

1 5

4-7-2. Storing a telephone channel in

normal memory........................................22

4-7-3. Automatic telephone number

transmission.............................................22

4- 8. DCL (Digital Channel Link) SYSTEM

4-8-1. DCL system description.............................23

4-8-2. DCL system keyboard

4-8-3. Digital code entry.......................................25

4-8-4. Code squelch

4-8-5. Channel linkage.........................................27

4-8-6. Recall.........................................................30

4-8-7. Reset and return........................................30

4-8-8. Call sign entry

4- 8-9. DCL system notes

5. MAINTENANCE AND ADJUSTMENT......................33

5- 1. GENERAL INFORMATION...........................33

5-2. SERVICE...........................................................33

5-3. CLEANING........................................................33

5-4. MICROPROCESSOR BACK-UP LITHIUM

BATTERY REPLACEMENT 5-5. ORDERING SPARE PARTS

5- 6. ADJUSTMENTS............................................34

5- 6-1. Cover removal 5-6-2. Low power output

5-6-3. Microphone gain...................................34

5-6-4. DTMF level...........................................34

5-6-5. Sidetone and beeper level

5-6-6. RF power meter....................................34

5-6-7. TO (Timer Operated) scan timer 5-6-8. Open channel search step size

selection

5-6-9. Microphone UP/DWN step size and

scan step size selection 5-6-10. Microprocessor reset pins 5-6-11. Call sign monitor test pins

6. BLOCK DIAGRAM....................................................36

6- 1. TM-3530A......................................................36

6-2. TM-2570A..........................................................37

6-3. TM-2550A/2530A

6- 4. TM-2550E......................................................39

7. OPTIONAL ACCESSORIES.....................................40

7- 1. TU-7 TONE UNIT

7-2. MU-1 MODEM UNIT..........................................40

7-3. VS-1 VOICE SYNTHESIZER UNIT 7- 4. OTHER ACCESSORIES

8. REFERENCE 8- 1. ANTENNA

8-1-1. Fixed station

8-1-2. Mobile........................................................45

8-2. MOBILE INSTALLATION

8-2-1. Noise reduction..........................................46

8-2-2. Battery capacity

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33 33

34 34

35 35

41 41

45 45 45

1. FEATURES

• Easy-to-operate panel layout using a large LCD

display

The large LCD display shows operational conditions at a glance. The panel layout is ergonomically de signed for easy operation.

• Illuminated keys for easier operation

Keyboard keys are back lit. Illumination is also provid ed for operational switches reducing mistakes in oper ation.

Dual microprocessor system

Two microprocessors provide a versatile range functions that has not been possible in the past.

High RF power output with excellent stability

A high stability, high power output is also assured thru

the use of a heat sink that incorporates improved ther

mal design characteristics.

Microphone check function

This is useful for checking the microphone and modu

lation circuits.

• Automatic autopatch transmission

(TM-3530A/2570A/2550A/2530A only)

Autopatch operation has been simplified by incorpor ating the ability to store up to 15 telephone numbers in memory and then allow automatic dialing on com mand.

DCL system (optional)

Using the latest in digital technology, this new com munication system for amateur radio communications makes possible automatic open channel search, auto matic station connection, code squelch (digital squelch), etc. (Fully compatible with KENWOOD' cur rent DCS system.)

Voice synthesizer function

The selected frequency, digital code and ASCII code may be announced by synthesized human voice. (This

is provided by the optional VS-1 voice synthesizer.) [Telephone number may also be announced.

(TM-3530A/2570A/2550A/2530A only)]

Improved tone function (TM-3530A/2570A/2550A/2530A only)

38 subaudible tone frequencies can be selected and stored in memory or from the keyboard. (This is pro vided by installation of the optional TU-7 tone unit.)

2. SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS

Specifications

Frequency range

Mode FM F3 (F3E), F2 (F2D) (Control signal for DCL system) Antenna impedance 50 ohms Power requirement 12 to 16 VDC (13.8 VDC reference) Grounding Negative

(0 «

Current drain

Operating temperature -20*C to +50*C (-4*F to +122*F)

Dimensions

(Projection not

included)

Weight

Output power

(at 13.8 VDC,

50 ohms load)

(/) c

Modulation

Frequency stability Spurious radiation Maximum frequency deviation Audio distortion (at 60% modulation) Circuitry

Intermediate

frequency

Sensitivity

« >

Selectivity

s Ü

Spurious response

Squelch sensitivity

Scan stop level Output

External speaker impedance

Code

Modulation

♦-<

Frequency deviation

o u

Mark frequency and deviation

o Û

Space frequency and deviation Code transmission speed and deviation

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

Receive mode with no input signal

HI transmit mode Approx. 6.5A Approx. 16A LOW transmit mode

Wide 180 mm High Deep 195 mm 250 mm 215 mm

HI 25 W min. 70 W min.

LOW

Note: Recommended duty cycle

1st 2nd 12dB SINAD S + N/N

-6dB

-60 dB

Model

TM-3530A

220 to

225 MHz

Approx. 2.5A Approx. 4A

1.8 kg (4 lbs)

Adjustable up

to out 20 W

20.935 MHz

TM-2570A TM-2550A TM-2550E

144to148MHz

2.35 kg

(5.2 lbs)

Adjustable up

to out 60 W

Less than 3% (300 Hz to 3000 Hz)

Double conversion superheterodyne

More than 50 dB at 1 mV input

Beter than 70 dB (except fd-IF/2)

Less than 0.125 fN (threshold)

Less than 0.2 fN (threshold)

More than 1.5 W across 8 ohms load (5% distortion)

144 to

146 MHz

0.6A

Approx. 9.5A

Approx. 3A

60 mm

1.95 kg

(4.3 lbs)

45 W min.

5 W approx.

Adjustable up to out 40 W

1 minute : Transmission

3 minutes: Reception

Reactance

Less than ±15 PPM

Less than -60 dB

±5 kHz

10.695 MHz

455 kHz

Less than 0.25 juV

More than 12 kHz Less than 24 kHz

8 ohms

NRZ equal-length code

MSK modulation

±3.5 kHz reference 1200 Hz, ±200 PPM 1800 Hz, ±200 PPM

1200 bits/second, ±200 PPM

TM-2530A

144 to

148 MHz

Approx. 6.5A Approx. 2.5A

195 mm

1.8 kg (4 lbs)

25 W min.

Adjustable up

to out 20 W

Note: Circuit and ratings are subject to change without notice due to developrpent in technology.

2-2. ACCESSORIES

O 'ft

nil

t- Zi O ^ ^ ^

Unpack your TM-3530A/2570A/2550A/2550E/2530A carefully and confirm that it is supplied with the following accessories.

.....

1 pc. 1

pc.

2 pcs.

1 pc. 1 pc. 1 pc. 4

pcs.

pcs. 4 pcs. 1

pc. 1 pc.

pc.

pcs.

copy

(D DC power cable for TM-2570A

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

a. Bracket b. Bracket assy (Right)

c. Bracket assy (Left) ........................................

d. Cushion e. Allen bolt (Black) f. Hex socket screw g. Flange nut

h. Flat washer (Black)

i. Flat washer.....................................................

j. Spring washer ................................................

k. Tapping screw...............................................

1. Hex wrench

DC power cable for TM-3530A/2550A/

Spare fuse for TM-2550A/2550E (10A) Spare fuse for TM-3530A/2530A (8A)

Instruction manual

Warranty card (U.S.A. only) .............................

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2550E/2530A ............................................

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........

(T91-0357-05)

........

(J19-1346-04)

.......

(N87-4008-41)

........

(A 13-0668-04)

........

(A13-0666-02)

........

(A13-0667-02)

........

(G13-0823-04)

........

(N99-0304-04)

........

(N09-0008-04)

........

(N14-0510-04)

........

(N15-1040-45)

........

(N15-1060-46)

........

(N16-0060-46)

........

(N09-0632-05)

.......

(W01-0401-05)

........

(E30-2044-05)

........

(E30-2022-15)

........

(F05-2034-05)

........

(F05-1031-05)

........

(F05-8021-05)

........

(J02-0439-05)..........

........

(B50-8039-50)

...........

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% %

Shipping container:

Save the boxes and packing in the event your unit needs to be transported for remote

operation, maintenance, or service.

3. INSTALLATION AND CONNECTION

3-1. INSTALLATION

3-1-1. Precautions

1. Avoid direct sunlight, and select a dry, well ventilated location.

2. Since the heat sink is on the rear panel, avoid placing the equipment with the bottom and rear sides close to a wall or desk.

3. When installing the equipment in an automobile, en sure adequate ventilation. Install the equipment in a location where the rear does not make direct contact with the seat, and is not directly exposed to vibration.

4. Avoid installing the equipment in front of the car heater air outlet.

3-1 -2. Power supply

The standard operating voltage of transceiver is 13.8 V.

Do not use a power supply (both fixed and mobile) that

provides over 16 V with the power switch of transceiver

turned off.

Operation under such a condition will void the warranty. Also, do not use a power supply that does not supply at least 12V in transmit or receive. Use of such a supply may cause the performance of the equipment to suffer.

3-1-3. Mounting bracket

Using the supplied mounting bracket, install the trans ceiver in any convenient location. (Fig. 3-1)

Caution;

Do not install the speaker directly on the transceiver, it may cause howling. The heat sink provided at the rear of

the transceiver will get hot during long transmission. Do

not install the radio in a position where the heat sink may come in direct contact with the dashboard. Installation near heater air outlets should also be avoided.

If your car is equipped with an electronic fuel injection system, the transceiver should be mounted as far from the control equipment as possible.

Install the bracket as shown in Fig. 3-2 and Fig. 3-3.

Note:

Do not install backwards.

Drill holes in the bottom of dashboard. Secure the mounting bracket with nuts and bolts.

be adjusted to any of 5 possi ble viewing angles by loosen ing the 4 alien bolts at the top of the bracket using the hex wrench provided. After the desired angle has

been selected tighten the 4 bolts.

@11

____________

cure the transceiver.

Carefully slide the transceiver into the mounting bracket.

(a)

keyhole on the side of the mounting bracket, the lever can be locked and the trans ceiver secured.

(b)

Fig. 3-3

3-2. CONNECTION

3-2-1. Precautions

1. When connecting or disconnecting the power cable to or from the power connector, be sure to turn off the

POWER switches of the transceiver and the DC power

supply.

2. Observe polarity of the cable. The transceiver oper ates on 13.8 VDC, negative ground. Battery polarity must be correct. The power cable is color coded.:

Red and white : © polarity (Positive)

Black and gray : © polarity (Negative)

3-2-2. Fixed station

A regulated DC power supply (13.8 VDC) is required. The PS-430 is recommended for TM-3530A/2550A/2550E/2530A. The PS-50 is recommended for the TM-2570A.

3. The standard operating voltage of the equipment is

13.8V. Do not operate below 12V or over 16V.

4. When charging your vehicle battery, or when jumpstarting a dead battery, ALWAYS disconnect the power cable from the back of the transceiver, or da mage may result to the transceiver.

B. Connection of another DC source

TM-3530A/2570A/ Regulated DC

2550A/2550E/ power supply

2S30A I'e] O

1 1 ©

'k^F-rrrlOO r-r

Standard voltage: 13.8 VDC Current capacity: TM-2570A: 16 A

TM-2550A/2550E: 10 A TM-3530A/2530A: 7 A

o O ©00$

3-2-3. Mobile A. Wiring on installation on the car.

Note:

Preferably, the voltage should be adjusted to 1 3.8 VDC. The regulated supply should be

equipped with a built-in protection circuit for both overcurrent and overvoltage.

Caution:

A battery charging power supply cannot be used.

Notes:

Before installing the power cable, be sure to remove the negative lead from the battery for safety. After installation and wiring, be sure to double check for correct installation before reconnecting the negative lead to

the battery terminal. 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. After completing the wiring, wrap the fuse holder with tape to protect against moisture.

Do not cut out the fuse even if the power cable is too long.

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

hole.

From passenger compartment

Thread like this

B. Ignition noise

This transceiver is designed to suppress ignition noise;

however, if excessive noise is present, it may be neces sary to use suppressor spark plugs (with resistors).

The PG-3A DC line noise filter is available as an optional

accessory for additional filtering, if required. (Except

TM-2570A)

3-2-4. Antenna

Note that the SWR of your antenna should be less than

1.5. A high SWR will cause the TM-3530A/2570A/ 2550A/2550E/2530A protective circuit to operate, re ducing the transmit output power.

4. OPERATION

4-1. CONTROLS AND THEIR FUNCTIONS

4-1-1. Front panel

® AL (Alert) switch

This switch is used to check the specified priority channel. Depress the switch and the priority channel will be checked at about 6 second intervals regardless of the KEY/M.CH switch position. A "dual beep" sounds when the priority channel is in use.

(2) PRIO (Priority) switch

This switch is used to recall the priority channel. By depressing the switch, the operating frequency is switched to the priority channel, and the PRIO indica tor lights.

0 LCD Group

See page 12.

® Keyboard

See page 13.

0 F.LOCK (Frequency Lock) switch

Pressing this switch locks the selected frequency. The LED indicator lights when this switch is ON, as a visual reminder.

ON AIR indicator

This LED (Light Emitting Diode) will light during trans

mission.

M.CH (Memory Channel) switch This switch is used to select either key mode (key board operation) or memory mode (memory channel operation). The MEMORY CHANNEL selector is illu minated in the memory mode.

MEMORY CHANNEL and TONE FREQUENCY selector This switch is used to select the desired memory

channel. There are 23 memory channels. CH 1 to 19, CH A ( Я ), CH b ( b ). CH d ( с/) and CH U (¿;). [This control is also used to select one of the 38 tone fre quencies or one of the 15 telephone numbers. (TM-3530A/2570A/2550A/2530A only)]

VOICE switch

Pressing the switch actuates the VS-1 voice synthe

sizer unit.

(Щ) TONE switch

(With the TM-3530A/2570A/2550A/2530A) This switch is used to select the desired tone fre quency. Any one of which can be 38 different fre quencies between 67.0 Hz and 250.3 Hz are availa ble. See page 20 for additional information on this switch. (Optional tone unit TU-7 required.)

(With the TM-2550E) When this switch is pressed, the repeater control tone signal (1750 Hz) circuit is activated and the unit is set

in the transmit mode.

(Й) (With the TM-3530A/2570A/2550A/2530A)

PHONE switch

Press this switch to select the telephone address

number and program or recall the desired telephone

number.

See page 21 for further information on this function.

(With the TM-2550E)

P. MR (Paired memory channel direct recall)

switch This switch is used for direct recall of paired memory

channels (16 CH).

d|) SQL (Squelch) control

To eliminate receiver noise during no-signal period, slowly adjust the SQL control clockwise until the

noise disappears and the C.TUN indicator goes off (threshold point). When a signal is received, the squelch will open, the C.TUN indicator will light and the speaker will oper ate. If the signal is weak or fades during mobile opera tion, readjust the squelch for constant reception. For scan operation, this control must be set to the thre shold point.

® POWER/VOL control

Power ON/OFF switch and volume control are com

bined. Turning the control fully counterclockwise will

turn the power OFF. Clockwise rotation will increases

the audio output.

(S) DCL system keyboard

See page 25.

® MIC connector (8-pin)

For connection of the supplied microphone (and or

MC-48 autopatch microphone).

0 Earth (GND)

-----------

r (D STBY (PTT)

dD HIGH/LOW switch (H HIGH ^ LOW)

HIGH setting: This setting allows the TM-2570A to transmit up to 70 watts output, the TM-2550A/ 2550E up to 45 watts output and the TM-3530A/ 2530A up to 25 watts output. LOW setting: This setting allows the TM-3530A/ 2570A/2550A/ 2550E/2530A to transmit up to ap prox. 5 watts output.

dD SCAN switch (£L TO ^ CO)

When TO (Time Operated) scan has been selected the scan will stop on an occupied channel for a specific time frame (internally adjustable between 0 and 5 se conds). When CO (Carrier Operated) scan is selected the radio will remain on a station until the carrier drops out.

dD LAMP switch (^ON)

This switch is used to illuminate the keys and switches.

dD REV switch

This switch is used to reverse the repeater shift

(± 600 kHz for the 144 MHz band, ± 1.6 MHz for the 220 MHz band) and other transmit/receive frequen cies (CH 16 - CH 1 7, CH 18 - CH 19).

DOWN

------

Caution:

The radio may be damaged if an external source vol

tage is applied to pins 2-5.

1. LCD group

Q By pressing the |0S| key on the keyboard, the 0

indicator will light in sequence to show the trans mit frequency is switched down 600 kHz (1.6 MHz with the TM-3530A) from the receive fre quency. By pressing the [OS | key on the keyboard, the indicator will light in sequence to show the trans

ceiver is operating in the simplex mode.

[T] By pressing the |OS| key on the keyboard, the Q

indicator will light in sequence to show the trans mit frequency is switched up 600 kHz (1.6 MHz with the TM-3530A) from the receive frequency.

This lights when the tone function has been selected.

This indicator lights when scan operation is in pro gress.

This indicator lights when the automatic telephone number transmission function has been selected. See page 21. (With TM-3530A/2570A/2550A/2530A only)

"MHz" lights in the frequency display mode.

[The display changes to "Hz" in the tone frequency display mode. (TM-3530A/2570A/2550A/2530A only)]

This indicator lights when the DCL (Digital Channel

Link) has been completed.

These indicators display memory channels 1 to 19, A (R),b(b),d(d)orU(u').

Memory channel scan lock-out designator. If you desire to skip a busy memory channel during memory scan, press the |L0| key. The star designates

the channel will be skipped during scan.

This indicator lights when the REV switch is ON.

PRIO (Priority) indicator

This indicator lights when the PRIO switch is ON.

(S) C.TUN (Center Tuning) indicator

This indicator lights when the receiver has tuned in to

another station.

dD S/RF level meter

This LED level meter indicates the relative receive in

put signal strength or transmit RF output.

The level meter also indicates the microphone input

level during low-power transmission so that micro phone checking is possible.

(ID Frequency, digital code, and call sign (ASCII code) in

formation are displayed.

[The tone frequency, telephone channel number and telephone number are also displayed. (With TM-3530A/2570A/2550A/2530A only)]

2. Keyboard

Depress the [^, [^, [4] and keys respectively. The

frequency display will indicate "6.940" (146.940

MHz). [The number keys function also serve as autopatch keys during transmit mode. (TM-3530A/2570A/ 2550A/2530A only)]

Depress this key to select a frequency shift other than

the one recommended by the ARRL Band Plan (Sim

plex, +, or - 600 kHz for the 144 MHz band and 1.6 MHz for the 220 MHz band) and the ITU Region 1 Band Plan (Simplex, -600 kHz for the 144 MHz band). (The standard ARRL and Region 1 Band Plan have been pre-programmed.)

This key is used to designate the priority channel. First, select the desired channel, then depress the PRIO switch and finally press the |PS| key. The microprocessor is reset by turning the POWER switch ON while depressing this key.

0 |LO| (Lock-Out) key (Skip)

This key is used to designate the memory channel(s) to be skipped during memory scan. Select the chan nel to be skipped when the select switch is set to M.CH and then press this key. A star ★ appears on the LCD to show the channel has been locked-out.

This key is used for scan operation. Press the key when the squelch is ON. Band-scan operation is exe cuted while in the key mode and memory-scan opera tion is performed in the memory mode.

©[^ (Clear) key

Use this key if you have made an error during pro gramming. By pressing this key, the frequency set by the numeric keypad is cleared. When cleared, the fre quency display will indicate the frequency that was displayed before the last entry was cleared. This key is also used to release scan operations.

This key is used to store frequency and offset. [This key is also used to store tone frequencies and telephone numbers in memory. (TM-3530A/3530A/ 2570A/2550A/2530A only)]

4-1-2. Rear panel

Connect a 4 ~ 16 ohm speaker using the supplied

plug.

Connect a 50-ohm antenna to this terminal.

4-1-3. Microphone

Connect the supplied power cable. Input voltage is

1 3.8 VDC. Do not reverse the polarity!

These switches are used to step the operating fre

quency up or down during both keyboard and memory

channel operation.

PTT switch used for transmission. This will also re lease scan operation.

4-2. RECEPTION

After power and antenna connections have been com pleted, set the controls and switches as follows:

©Turn the POWER/VOL control, clockwise, to turn on

power. The indicators on the display will light to show the transceiver is operating. The indicators normally work about 0.5 seconds after the power switch is turned on. [When the power switch is initially turned on, 4.000 (0.000 with the TM-3530A) will be displayed.]

® As the POWER/VOL control is turned clockwise,

either background noise or a QSO will be heard.

For SQL control operation, refer to the following ex planation.

4-3. TRANSMISSION

4-3-1. Precautions:

©The TM-3530A/2570A/2550A/2550E/2530A an

tenna impedance is 50 ohms. Be sure to use only an

antenna of 50 ohms impedance.

ing to prevent interference with other stations.

transmit mode; the ON AIR indicator will light and the

LED bar meter will show the relative transmitter power. Recommended talk distance to the micro phone is approximately 5 cm.

To transmit, first select the desired frequency and see

whether it is busy or not. If it is not busy, simply depress the PTT switch and speak into the microphone. The ON AIR indicator will light.

play may appear in the display. (For the lithium battery

replacement, refer to section 5-4 on page 33.)

Notes:

1. When the lithium battery is replaced, the micropro cessor must be reset, using the procedure in section 4-4-2.

2. When the lithium battery fails, the radio's microcoded functions are NOT affected. Only information stored in memory will be cleared.

4-4-2. Initial state and reset of the micropro

cessor

A. Initial state of the microprocessor from the

factory

Default setting after reset Display

Frequency: 4.000 (144.000 MHz)

[0.000 (220.000 MHz) with the

TM-3530A] Offset: [^(Simplex) Memory channel: CH 1

KENWOOD

ij n n n

l.u U LI MH,

4CS »CSQ RESET SCHL

TM-2550A

144MHI FM TRANSCEIVER

□ n □ □ D

Display after reset

HI/LOW switch

Local QSO's can be enjoyed with less interference to others, and with less power consumption, by reducing the RF output power.

The relationship between the HI/LOW switch positions

and the actual output power is as follows. TM-2570A

TM-2550A/2550E

TM-3530A/2530A

At LOW power, the power indication will drop to approxi mately "4 - 6" on the meter, and the microphone modu

lation check function operates.

HI LOW HI

LOW HI LOW

70W/approx. 16 A Approx. 5W/approx. 3A 45 W/approx. 9.5 A Approx. 5 W/approx. 3 A 25 W/approx. 6.5 A Approx. 5 W/approx. 2.5 A

4-4. MEMORY

4-4-1. Microprocessor memory back-up

A lithium battery is contained in the transceiver to retain

memory. Turning off the POWER switch, disconnecting

the power cable, or a power failure will not erase the

memory. The battery should last for approximately five

years. When the battery discharges, an erroneous dis

B. Microprocessor reset

When the microprocessor has functioned erroneously or when setting the transceiver in the initial state, switch on the power with the PS key pressed.

Note;

The microprocessor can be easily reset. However, only

perform this operation when necessary since the con

tents of memory are cleared by resetting.

4-4-3. Memory input

(The same procedure is used with the TM-3530A.)

Example: Storing 144.650 MHz with +600 kHz offset in

memory CH 5.

CHANNEL selector will not be illuminated.)

("0" will be automatically selected as the last digit when you enter 0 ~ 4, as the last digit. "5" will be se

lected when you enter 5 ~ 9 as the last digit.)

standard offset for that frequency. You can scroll thru

the different possibility by repeatedly pressing the

key. If you want the standard offset skip this step.

CH5 appears in the memory channel indicator.

® Press the key to enter the information into

memory.

To confirm memory channel entry press the M.CH key. The MEMORY CHANNEL selector will be illuminated.

The LCD should show the frequency and offset that you

just entered, 4.650 "+". If the display does not show the

correct data, simply repeat steps 1 thru 5. If you wish to store new data into a memory channel simply repeat steps 1 thru 5 for the desired memory channel. Old data will be lost when you press the key.

RX CH 16 CH 18

RX TX CH 17 CH 19

— CH 17 — CH 19

— CH 16 — CH 18

4-4-4. Paired channels

Two paired channels allow for "odd split" frequency

shifts. Use this option when the desired frequency shift is other than the standard 600 kHz (1.6 MHz with the

TM-3530A) shift. Any split within the full operating

range of the radio is possible. Channel pairs are: CH's 16-17 and CH's 18-19

Example: A 1 MHz split stores 144.600 MHz in CH 16

and 145.600 MHz in CH 17.

to store these frequencies in channels 16 and 17.

Either frequency (receive or transmit) may be stored in

either channel of the pair.

memory mode and select either CH 16 or CH 17 with

the MEMORY CHANNEL selector.

transmit frequency stored in the alternate channel of the pair,

® Release the PTT switch, and the original receive fre

quency stored in CH 1 6 or CH 17 will display.

The other channel pair, CH 18-19, operates in the same way. When channel pairs are used, the 600 kHz (1.6

MHz with the TM-3530A) shift and mode indicators, 0,

PI and do not function.

4-5. SCAN

4-4-5. Priority channel select

Any one of the 23 memory channels can be selected as the priority channel. 0 Depress the AL switch. (D Select the memory channel to be the priority channel

using the MEMORY CHANNEL selector.

(D Press the | PS| key to enter the selection.

SCAN operations are divided into keyboard scan, memory scan and priority channel scan. For SCAN oper ation, the squelch control should be advanced to the threshold point. (See page 11 for squelch control.) First, select either TO (Time Operated) hold or CO (Carrier Operated) hold with the SCAN switch. The TO scan duration may be set thru the use of an inter nal potentiometer.

For details, see page 34.

4-5-1. Memory scan from the keyboard

MEMORY CHANNEL selector will light.)

® Press the [SC| key to initiate scanning.

Scan will begin from the current displayed channel ad

vancing, toward the higher numbered channels.

4-5-2. Programmable band-scan from

the keyboard

The lower limit may be programmed into memory "d" and the upper limit into memory "IJ”.

MEMORY CHANNEL selector lamp will go OFF.

initiated within the limits set in channel " d " and “ U ", scan will proceed from the currently displayed fre quency (within the programmed limits), in 5 kHz steps. If you initiate scan outside the programmed limits, scan will proceed outside the programmed limits, in 5 kHz steps.

@ When the same frequency has been stored in both

memory "d " and memory " U ". The radio will scan

the entire frequency range of the radio.

4-5-3. Scan direction

During scan operations you can reverse the direction of scan with the UP and DWN pushbuttons on the micro phone. Pressing the DWN key causes scan to proceed down in frequency. Pressing the UP key causes scan to

increase in frequency.

Lock out indicator be locked out. \

0 A star ★ will appear on the ©When the |LO| key is pressed

display when this key is again, the star ★ will disappressed, indicating that pear and lockout will be re lockout has been complet- leased, ed.

® Select the channel to 0 Set to memory

______________

mode.

4-5-4. Scan speed

Scan speed can be increased by holding either the UP or the DWN key depressed, depending upon the desired di

rection of scan.

4-5-5. Scan lockout (Skip)

This transceiver has a scan lockout function which al

lows you to temporarily skip unwanted memory channels

during memory scan.

(The MEMORY CHANNEL selector will light.)

MEMORY CHANNEL selector.

the memory channel number.

® Repeat steps © and © to lockout any unwanted

memory channels. To cancel channel lockout, select the memory channel to be restored, and press the |LO| key. The star will disappear.

4-5-6. Scan release

Scanning can be released by any one of the following operations: Select the most convenient. © Press the key. © Press the PTT switch once. © Turn power OFF. © Set the PRIO switch to ON. © Set the F.LOCK switch to ON.

4-6. REPEATER

4-6-1. Automatic repeater offset

The standard ARRL and ITU Region 1 Band Plan, as far as TX offsets is concerned, has been pre-programmed into the TM-3530A/2570A/2550A/2550E/2530A. This

(With the TM-3530A)

4-5-7, Priority channel scan (Alert)

To monitor the priority channel, press the AL switch in.

When there is activity on the band you will hear two

beeps at about six-second intervals. The REV switch

deactivates this priority alert.

may be easily overridden by using the |OS | key. The

chart below graphically displays the programmed off

sets.

220.000

(With the TM-2570A/2550A/2530A)

144.00 145.10 145.50

(With the TM-2550E)

144.00

223940 224.995

—

145.60 il46.00

146.00 146.40 146.60 14700 147.40 I47.60

+ s

145.85

—

148.00

—

4-6-2. Tone frequency

(TM-3530A/2570A/2550A/2530A only)

(The tone unit TU-7 option is required for this function.)

1. Setting

0Turn the MEMORY CHANNEL selector to select the

desired memory channel. (When in the key mode you may ignore this step.)

® Press the TONE switch. The display will indicate the

CTCSS tone frequency, or"

d) Turn the MEMORY CHANNEL selector to select a tone

frequency from the 38 possible frequencies. The pT] indicator will light.

0To store the tone frequency into a memory channel,

press the key. (This step may be ignored when in the key mode.)

® Press the TONE switch to return to the frequency dis

play mode. When transmission is begun in this mode, the tone frequency currently selected will be transmit ted.

Example: To store tone frequency 88.5 Hz in memory

CH 5

MEMORY CHANNEL selector is illuminated) and turn

the MEMORY CHANNEL selector to display "5" in the

memory channel display indicator.

"88.5 Hz" in the tone frequency display. The indi

cator will light.

frequency.

display mode.

----------

2. Release

the MEMORY CHANNEL selector to display "

The indicator will go OFF.

©To release the tone frequency stored in memory,

press the key.

Available CTCSS tone frequencies

Hz Hz Hz

67.0

71.9 118.8 203.5

74.4 123.0 210.7

77.0

79.7 131.8 225.7

82.5

85.4

88.5 91 5

94.8

97.4

100.0

103.5 173.8

107.2

110.9

114.8 192.8

127.3 218.1

136.5

141.3 241.8

146.2

151.4

156.7

162.2

167.9

179.9

186.2

----------

233.6

250.3

4-7. AUTOMATIC TELEPHONE NUM

BER TRANSMISSION SYSTEM (TM-3530A/2570A/2550A/2530A only)

This function simplifies conventional 16-key autopatch

operation by utilizing a one-touch automatic dialing sys

tem. Up to 15 different 7-digit telephone numbers may

be stored in memory. A separate channel is assigned to

each telephone number, and all telephone number pro

gramming is performed in reference to this channel.

Example: Storing the telephone number (123-4567) in

the telephone number CH 3.

4-7-1. Telephone number programming

The display will show " — " if no telephone data has been programmed, or the reset button has been installed. If data has been programmed the display will show the current telephone channel number.

® Rotate the MEMORY CHANNEL selector to select the

desired telephone number channel. The telephone in dicator will light and the display will show " R 1 (thru R 1 5 )".

® Press the I PS I key.

The display will show the first three digits and a hyp

hen, or three blanks and a hyphen if no data has been entered. The memory channel display will now indi cate the selected telephone number channel (1 - 1 5),

rather than the normal memory channel numbers (1 -

19, R , b, d , u ). A beep will sound each time you

pass channel 1 as a quick audio check of your relative

position. As you rotate the MEMORY CHANNEL se

lector the telephone channel number will change and

the first three digits of the telephone numbers con

tained in the various channels will be displayed. If no

data is entered the display will only show the hyphen.

ing the numeric keypad. Input errors may be cleared

by pressing the key. After the third digit has been

entered a beep will sound and the display will show 4

blanks, indicating the radio is waiting for you to enter

the final four digits.

® Use the numeric keypad to enter the final four digits.

After the final digit has been entered a beep will

sound, and the display will return to show the first

three digits of the telephone number. You can review

the contents of the entire telephone channel by repea

tedly pressing the |PS] key. (To enter a pause, or blank press the I SC I key.)

Entry of the remaining telephone channels is performed

as in steps 4 and 5 above.

^-1-2. Storing a telephone channel in normal

memory

ORY CHANNEL selector. © Press the PHONE switch. © Select the desired telephone channel number with the

MEMORY CHANNEL selector.

(When the key is pressed, "R--" will be dis

played, erasing any previously stored telephone chan

nel number, and turning off the telephone indicator

If you wish to review the contents of the tele

phone channel press the I PS I key as previously de

scribed.)

® Press the [m] key.

(Pressing the [m] key stores the telephone channel in

formation in the selected memory channel. Either the

key mode or the memory mode may be used for this operation.)

® Press the PHONE switch to return to the normal fre

quency display.

Any telephone number channel may be entered into any memory channel location using the above procedures.

4-7-3. Automatic telephone number transmis

sion

the MEMORY CHANNEL selector. © Press the PTT switch. © Press the PHONE switch to initiate transmission of

the telephone number.

(Pressing the PHONE switch with the telephone indi

cator off will cause an alarm to sound, signifying an

error in operation.

* Conventional 16-key autopatch operation is also possi

ble, as is a combination of automatic dialing and con ventional dialing. Simply press and hold the PTT bar when conventional operation is desired.

4-8. DCL (Digital Channel Link) SYSTEM

(The optional modem unit MU-1 is required for DCL sys tem operation.)

* Packed with a variety of new ideas, the DCL system

makes possible multiple functions with simple opera tion.

* The DCL system incorporates additional features but is

compatible with the current DCS system.

4-8-1. DCL system description

A. Automatic QSY from any frequency to an open

channel

The DCL system searches, on command, for an open channel, remembers it, returns to the original frequency and transmits control information to the receiving station that switches both radios to the open channel. Micro

processor control assures fast and reliable operation of the DCL system.

B. Operating principle of DCL system

The circuit concept of the DCL system is shown in the diagram. IC2 is the main processor which controls the DCL system's input/output processing and other general functions. ICS is a processor concerned primarily with data processing, and Modem (modulator/demodulator) is the data transmission LSI using MSK (Minimum Shift

Keying). As the digital data interface, the modulator sec tion sends data required for transmission as a MSK sig nal synchronized with the clock. The demodulator sec tion decodes the incomming MSK signal to obtain the data signal, and also reproduces the clock signal at the same time. Required data is exchanged between these

ICs as is the clock data, so as to process various func tions.

Conventional method (manual)

DCL system

C. Digital code memory function for handling

multiple stations, plus standby functions:

There are 100,000 5-digit code groups possible. Several different codes can be stored in memory.

D. Recall and reverse functions for preventing

received station being lost:

When the DCL system of the station which has received

digital signal is not ON, or when skipping to an open channel is not possible, due to interference or distur bance, instructions to the called station can be easily retransmitted.

E. Automatic transmission and display of call sign

Up to 6 characters can be input as the call sign. Alth ough the input uses ASCII codes, 2-digit hexadecimal

numbers are actually utilized for call sign entry. Each code is converted into an ASCII code inside the radio. Call sign data is transmitted as long as the DCL switch is

ON. An unique feature of this system is that by combin

ing it with the optional CD-I 0 call sign display, it can de code the signal from a station which uses the DCL sys tem and display that call sign alphanumerically.

Concept of DCL system

F. New code squelch function with repeater

operation

Code squelch is a selective squelch system operated thru

the use of digital codes. It allows you to listen only for

those stations that transmit the proper digital code. It is

especially powerful when more than one station is on the

frequency, like when using repeaters. Its advantages are;

1 ) Very few operation errors thanks to digital control; 2) Multiple access code monitoring; 3) Possibility of linkage to an open channel even during long periods of inactiv ity. When operating on a repeater, the control signal (as shown in the diagram) is transmitted to assure proper code squelch operation.

Control signals for CHL operation

Control signal:

^ ; The control signal with channel data ^ : The control signal with no channel data

Flashing CHL indicator-

Time

DCLSW CHLSW ON ON

Time

ON ON

Time ——

Beep 1[«^

Time

DCLSW ON

Time

CHLSW ON

TONE SW TONE SW PTT SW ON OFF ON Approx. 1 sec.

Beep: Beep 1

Beep 2

DCL system indicator ON

Beep 2

Original RX freq. Open channel RX

QSY

CHL indicator ON

Fig. a. Simplex mode

DCL system indicator ON

Flashing CHL indicator

Beep 1

Sub tone

Approx. 1 sec.

Sub tone ^

Original RX freq.-4—Open channel receive

PTT SW OFF

^Beep 2

Fig. b. Offset mode (TM-3530A/2570A/2550A/2530A)

— Flashing CHL indicator

1750 Hz

tone

DCL system indicator ON

Beep 1

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

Original RX freq..« t t Open channel RX

PTT SW OFF

Fig. c. Offset mode (TM-2550E)

CHL indicator ON

_________

CHL indicator ON^

'*"^Beep 2

QSY

G. Control signal of DCL system

The DCL control signal consists of: 1) Bit/frame sync signal for distinction of the DCL signal from noise or other data communication signals; 2) 5-digit digital code data for station recognition; 3) Open channel data; and 4) Call sign data which is a combination of alphanumeric data. Auxiliary data is also provided for future system ex pansion. This control signal is transmitted at a speed of

1200 baud, requiring approx. 0.2 seconds, which has al most no effect on normal communication. A beep sound, peculiar to DCL, (similar to the sound of "packet radio") is heard when this signal is received.

Synchronizing signal

------

H—

Oigitat Channel code data

Call sign data

Composition of control signal

Time

DCL operation control signal

^ The control signal with no channel data

________

t !

DCL SW PTT SW ON ON

DCL system indicator lighting.

Fig. a. Simplex mode

--------------DCL system indicator ON-

DCL SW „ ON PTT SW

Appro* 1 sec

Fig. b. Offset mode (TM-3530A/2570A/2550A/2530A)

DCL SW ON

___________

' Approx 1 sec

PTTSW ON

DCL system indicator ON_

Fig. c. Offset mode (TM-2550E)

PTTSW OFF

PTTSW

OFF

4-8-2. DCL system keyboard

Use this key when programming the digital code and call sign.

® C.SQ Indicator

This lights when the C.SQ function is ON.

Use this key to turn the code squelch function ON or OFF. The C.SQ indicator lights when this function is activ ated.

4-8-3. Digital code entry

Operating procedure

1. Press the CS key to cause the digital access code to be displayed.

(“00000" is displayed initially.)

(SI*

U LJ U U_MH

m m m cn ra ICDlEH* EO m 03

№

Pressing the key once causes the digital access code to be displayed.

(Pressing the key again will return you to the normal frequency display.)

on □ OD

2. Enter the digital code using the nu meric keypad.

ir:.

The code is stored in memory automati cally, when the final digit ts entered, and is confirmed by long beep.

Use this key to reset channel linkage operation.

® CHL (Channel Link) key

Use this key for channel linkage.

This lights when DCL is ON.

Use this key to turn the DCL system ON or OFF. The DCL system indicator lights when this function is ac tive.

Operation

The digital code cannot be

programmed with the F.LOCK on.

This function is independent

of the DCL key setting.

It is possible to receive while setting the codes but not to transmit.

Remarks

3. Rotate the MEMORY CHANNEL se lector to select the desired code posi tion for data entry, or to review the contents of the other 9 code memor ies.

4. Press the C.SQ key to activate the

C.SQ indicator.

□ El

Each time the MEMORY CHANNEL se lector is rotated one detent position the code memory will increment/decrement one position. Continued rotation will al low continious tuning of the code posi tions.

Pressing this key once lights the standby

indicator. Pressing the key again will turn the indicator OFF.

An audible beep is emitted from the radio each time the dial is rotated to code me mory position one.

This operation is valid only while the digital code is be ing displayed.

Operating procedure

5. Press the CS key to return to the nor mal frequency display.

mm^0*

ESI'

After all inputs have been completed, press the CS key to return to the normal frequency display.

Notes:

1. The digital code that appears when the CS key is pressed is the code that will be transmitted, regard less of the standby status.

2. The digital code that appears when the CS key is

4-8-4. Code squelch

This function gives the operator the ability to select which stations he/she wants to listen to. Only those sta tions that transmit the proper access code will be able to "OPEN" squelch.

For example: when station A wishes to talk with station

Operation

As long as you are displaying the digital codes you will not be able to transmit. Attempting to transmit will cause an error alarm of three beeps to sound.

pressed will also be one of the "Active" codes in re ceive, along with any other codes that have the standby indicator "ON".

B only, both stations should prearrange to be on the

same frequency, with the same access code.

Example: Frequency : 146.520 MHz

Digital code: 12345

The same procedure is used with the TM-3530A.

Remarks

Station A

1. Press the C.SQ key. (C.SO indicator will light and un desired signals will not break squelch.)

□ ID □ □

2. Signals of other stations (with different digital access

codes, or no digital code) will not be heard, even though the S meter confirms their presence.

m m

5.5?G

tShmiiiffl I i

□ D n

3. When station B transmits the proper access code, the C.SQ indicator will go out, and digital squelch will open. Three beeps will sound to signal reception of the de sired code.

□□mrn gs«

m IEIi=|

Station B

1. Press the DCL key to turn on the DCL system.

G3lE3‘

cn 03

5.5 ¿'0

3. Press the PTT switch to send the transmit code. (Code information is sent at the beginning and the end of each transmission.)

m m m m

¡El.

03 im

KENWOOD TM 2550A

HHIuiiwiiìiìiHÌM 1 J

^ -M«4FMl8*«SCi.ve«

6 iS o o in

...

ISilE

Doijicsi S'

To manually release the code squelch, press the C.SQ key again or press the PTT switch. (This does not start transmission.) Channel linkage using the DCL system is effective even in code squelch mode.

4-8-5. Channel linkage

Channel linkage operations cannot be performed until

you have completed entering at least one digital access

code. This information is required for proper system operation. You do not need to use the code but it must

With the DCL system ON (DCL key ON) in the code squelch condition (C.SQ key ON), turning the DCL key OFF will also release the code squelch function.

• The alert function has priority over code squelch oper ation.

be present. The DCL function allow easy one touch QSY to the first available open channel, of not only your radio, but the receiving radio as well.

Operating procedure Operation

1. Enter the frequency that you want open channel searches to begin from into memory channel A.

c u n n

o. “ u u

«1 IMANSCE^fH

□ D O OD

Memory entry is as discussed in previ ous sections. The digital channel search will search up to 11 channels from the frequency stored in memory channel A (a total of 12 channels).

(With the TM-2570A/2550A/2550E/ 2530A) The step size is: 15 kHz (or 20 kHz by cutting internal diode) for the TM-2570A/2550A/2530A, and 25 kHz with the TM-2550E.

Example: When 146.400 MHz is en

tered in CH A (TM-2570A/

2550A/2530A) search pro

ceeds as follows:

1. 146.400

2. 146.415

3. 146.430

12. 146.565

Remarks

If you have entered a fre quency into memory channel "b", that is one of the fre quencies that will be scanned by the channel search function, that fre quency will not be selected as the open channel, even if it is vacant.

Note: Open channel search will not stop on the original fre quency under any circum stance.

(With the TM-3530A) The step size is: 20 kHz (or 40 kHz by cutting internal diode)

Example: When 223.540 MHz is en

tered in CH A search pro ceeds as follows:

1. 223.540

2. 223.560

3. 223.580

12. 223.760

Operating procedure

Operation

Remarks

2. Press the DCL key to switch the sys tem ON.

m m

B.SE'D

Cl;

mm03 eg

^.i

< When the offset is [^(Simplex) >

3. Press the CHL key to start channel linkage operation.

Pressing once turns the system ON and lights the DCL system indicator. (Press

ing again switches the system OFF.)

When the key is pressed once, the LCD indicator flashes and the open channel

range is scanned. (The frequency display also displays the open channel being scanned.) When an open channel is found, the original operating frequency is selected and data is automatically trans

mitted for movement to the open chan

nel.

If the C.SQ system of the receiving sta

tion is on, in conjunction with the DCL

system, you must ensure that the trans

mit code is the same as his receive code

for proper system operation. If the

codes are the same the DCL system will

operate normally, ie. both radios will be

switched to the open channel.

When the noise appears, set the squelch control to the threshold point.

1. When an open channel is not found, press the PTT switch or RESET key to release the search.

2. If another station is trans mitting on the original fre quency when the unit re turns from the open chan nel search, automatic transmission will not take place. The radio will enter a receive mode, in which a series of three beeps sounds repeatedly, while normal receive functions occur. As soon as the channel is open you can initiate the automatic fre quency change by simply pressing the PTT switch.

< When the offset is [T] or PI >

3. Press the CHL key to start channel linkage operation.

(^*1

m PI s m

ES>'

ni'l

□ non

When the key is pressed once, the LCD

indicator flashes and the open channel range is scanned. (The frequency display also displays the open channel being scanned.)

When an open channel is found, the ori

ginal operating frequency is selected and the radio will enter a receive mode, in which a series of three beeps sounds re peatedly, while normal receive functions occur. As soon as the channel is open you can

initiate the automatic frequency change by simply pressing and releasing the PTT switch. (TM-3530A/2570A/2550A/

2530A only) The TONE switch must be on for proper

operation. (TM-2550E only)

1. If an open channel is not found, press the PTT switch or RESET key to

release DCL functions.

2. Channel linkage does not occur until the PTT switch

is released.

3. Just as when operating in the simplex mode C.SQ system may also be used.

However, some repeater systems may not pass the DCL signal properly. This is due to a time delay in the repeater, and is not a fault of the DCL system.

To move to an open channel during communication be tween stations A and B at 146.520 MHz, proceed as fol

lows. (In this example, 146.520 MHz is the frequency of operation.) The same procedure is used with the TM-3530A.

Example:

Initiating station : Station A

Waiting station : Station B

Digital code : 12345 Offset : [S] (Simplex) Memory CH A : 146.400 MHz

Station A

1. Confirm the digital code. Press the CS key to check that the digital code is

"12345", then press the CS key again.

UJ 03

m no m m m

m Bai-

□ n □ on

2. Press the DCL key to switch the DCL system ON.

KENWOOD TM-2550A

5°5G0

□aczia

|]3|;D MMMirwTMMrtutvti

[Uci '»¿U^TcHw .offT

□ ID □ DO

|lE|

m m E

sot. i

3. Press the CHL key. The CHL indicator flashes and a search for an open

channel begins. (This example assumes that there is an open channel at 146.430 MHz.)

Station B

1. Confirm the digital code. Press the CS key to check that the digital code is "1 2345", then press the CS key again.

KENWOOD TM-25604

□ o

[□3

m m

Ei*

im 1518°

2. Press the DCL key to switch the DCL system ON.

B.SEG

m mio3 !si-

eIe E3=I

□ o □ on

3. Standby.

ICO

m E m m P3EEl E

im*

□ no DC

4. The original operating frequency (146.520 MHz) is se lected and data is transmitted automatically.

5. The radio QSY's to the open channel. As the movement to the open channel (146.430 MHz)

occurs, the flashing CHL indicator lights continuously and beep sound is generated to announce the comple tion of channel linkage.

5.W3G

on □ □

CD □3 m

ESI*

m lEn>

SSI"

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4. The transmit data of station A is received.

03 m

m ca m roi R3

E mim

EU*'

5. The radio QSY's to the open channel. As the movement to the open channel (146.430 MHz)

occurs, the CHL indicator lights continuously and beep sound is generated to announce the completion of channel linkage.

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atsi" 8S8"

B.^3 0 ...

m 03

mmim E col

4-8-6. Recall

The recall function is a channel re-linkage operation. If, in the previous example, the channel linkage could not be completed, station A would use the recall function to

again attempt to bring station B to the open channel (146.430 MHz). The same procedure is used with the TM-3530A.

Station A

Recall procedure (Channel linkage completed on initiating station but not on receiving station)

Station B

4-8-7. Reset and return

A. Reset function:

Use this function to move to another open channel after completing a channel linkage. This function enables either station to initiate channel linkage by resetting the

CHL system. (This is confirmed by the fact that the CHL indicator is turned OFF.)

Operating procedure

1. Press the RESET key.

B. Return Function:

Use if automatic QSY fails on any station you are com municating with. For example: stations A and B are comunicating with each other. Station A initiates the chan nel linkage function. However station B is not successful

Operating procedure

1. Press the RESET key.

,EZ3

5.5

Baa

m m !±1

SZ3

on □ oo

Pressing once turns the LCD indicator OFF and releases the channel linkage operation. Now, new channel linkage is possible.

Pressing the key again after reset opera tion causes the original channel

(146.520 MHz) to be displayed. Each time the key is subsequently depressed

the display will switch between the ori

ginal operating frequency (146.520

MHz) and the open channel frequency

(146.430 MHz). Press the CHL key

while the original operating frequency is

displayed and channel linkage operation

will be initiated again.

The same procedure is used with the

TM-3530A.

Operation

in the linkage operation. Pressing the RESET key will re turn the radio to the original operating frequency with a simple one touch operation.

Operation

The original operating fre quency and the open channel are stored into memory at the time the channel linkage

operation is originally com pleted.

Remarks

4-8-8. Call sign entry

The TM-3530A/2570A/2550A/2550E/2530A employs

a method of displaying and entering the call sign digit by digit using decimal ASCII codes. Set the call sign by re

ferring to the ASCII call sign data.

After the call sign has been entered, it will not be neces sary to reenter it as long as you operate the TM3530A/2570A/2550A/2550E/2530A. (However, if the reset (page 1 5) is depressed or the lith ium battery were to fail, reprogramming may be neces sary).

ASCII call sign data

65 B

E 69 F

1 : 73

M 77 N

Q 81 R 82 U 85 V

66 C : 70 74 78

86 W :

G : 71 H

K :

0 :

S ; 83

67 D

75 79

68 72

L 76

T 84

X 88

of call sign to ASCII code Digit Example:

(87)

D 6 D

(68)

(54)

Operating procedure

1. To display the call sign, first press the CS key and then, the RESET key.

rsn.

m m

mira

m -\

ElISI-

m m m

rSn

2. Enter the call sign, referring to the ASCII table on page 26, using the nu meric keypad.

B3 G3 E3‘

UWMI rv TIIANSCCIVeit

m[mi|rPTii.

I jgajjjj

(68)

5 J

(74) (89)

6 Y

Operation

Each time the RESET key is pressed, the call sign and digital code will be dis played alternately. Referring to the lefthand illustration, 1 of "1 00" indicates the first digit of the call sign, WD6DJY, for example.

To enter "W", press [8] then [7] on the

numeric keypad. A short beep will sound each time you press a key to confirm data entry and the digit will appear in the display. A long beep will sound after the 2nd digit of each alphanumeric char acter, and the display will change to indi cate the next character.

Y 89 Z

0 48 1 4

52 5

8 56

Space

: 32 49 2 : 53 6 : 54

9 57

Remarks

Whenever the call sign dis play has been selected by pressing the RESET key, the

1 St digit of the call sign will

always be displayed.

It is possible to receive, but

not to transmit while enter

ing the call sign. Attempting to transmit will cause an er ror alarm of three beeps to sound.

51 55

3. Enter the remaining characters.

m isi‘|

m m m

i-Q-i

El-I

ISS'>

4. Press the CS key to return to the nor mal frequency display.

El-

CO CO

yj CO COi □a

m m

ISIim CDl

1^“

Enter the remaining characters using the key below; (D) = 68, (6) = 54, (D) = 68, (J) = 74, (Y) =

89. After the final 9 has been entered, the display will return to the first character position. Enter your call sign using the procedures in step 2 and 3.

After all digits have been entered, press the CS key to return to the normal fre quency display.

To check the call sign data

rotate the MEMORY CHAN

NEL selector. A beep will sound each time you display the first character.

Remember that transmit is

inhibited while entering the

call sign.

4-8-9. DCL system notes

1. Standby digital code The standby indicator is a visual indication of which digital access codes will actually open the squelch on the radio. Simply stated it shows the "Active" codes. When the indicator is "ON" the code is active, when the indicator is "OFF" the code is not active, and is ig

nored. Fig. 1 illustrates an example code with the standby in

dicator "ON" (active). The code that is displayed when the CS key is pressed

"ON" (called a "Transmit digital code") becomes an

active code regardless of the standby indicator. For

example, the digital codes as shown in Fig. 2 are

stored in station As memory. Digital codes a, b and d are active codes. If station B transmits the proper code (a, b or d) he will open the squelch of station A.

When station A receives one of the active digital codes, the microprocessor will determine if the re ceived code matches the current transmit code. If the codes do not match, the microprocessor will change the transmit digital code so that it matches the incom-

ming digital code. For example, if station B transmits a signal with code

d (Fig. 2), the squelch of station A will open. Simulta

neously, station As transmit digital code (a in Fig. 2) will be changed to d. This may be confirmed by press ing the CS key. Code d will be displayed.

2. If the CHL indicator CHL is "ON" you will not be able to initiate, or receive channel linkage information. This is to prevent accidental channel linkage.

3. Detection of open channel When the squelch is closed (C.TUN indicator is off) for more than 1.5s, the channel is determined open. Occasionally, channel linkage may occur on a busy channel due to transients in the microprocessor.

4. Automatic transmission of channel linkage data is not

performed after finding an open channel, if another

station is transmitting on the original channel at the time the radio returns to the original channel. The ra dio will enter the receive mode, and waits for a com

mand to send the data.

5. Channel linkage during scan operation Channel linkage cannot be actuated during scanning.

m m

□ n □ oc

f O D U

I L U I

ra m

B3 ^0

<Fig. 1 >

Digital code when the CS key is ON.

I i i I

I t f f

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(

C U J D

" i Ji L

. J I J 3

L I L 3

★ /

O O 3 c

<Fig. 2>

6. Normal transmission using PTT switch When the DCL switch is ON, data is transmitted for approx. 0.2 seconds at the beginning and at the end

ing of the transmission: Wait a short period before

start talking after this moment.

7. Offset switch

When the [OS| key is not set to simplex, automatic transmission of DCL data from the original frequency does not occur. Pressing the PTT switch manually transmits data and causes movement to the open channel.

8. When channel linkage is initiated, the original operat ing frequency, offset and tone frequency are stored into memory. The open channel operates in simplex with no tone, regardless of original settings.

5. MAINTENANCE AND ADJUSTMENT

5-1. GENERAL INFORMATION

Your transceiver has been factory aligned and tested to specification before shipment. Under normal circum stances, the transceiver will operate in accordance with the instructions in this manual.

If your transceiver fails to work, contact the authorized dealer from which you purchased it for quick, reliable re pair. All adjustable trimmers and coils in your transceiver were preset at the factory and should only be readjusted

5-2. 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 dir ectly related to the service problem. If you do include ac

cessory items please list them in your correspondence. You may return your radio for service to the Authorized TRIO-KENWOOD Dealer from whom you purchased it. A

copy of the service report will be returned with the unit.

Please do not send sub-assemblies or printed circuit

boards. Send the complete unit, in its original boxes and

packing.

Tag all returned items with your name and call for identi fication.

Please mention the model and serial number of your ra

dio in any correspondence, whether phone or written.

For future reference, record this information in the space

provided on the back cover of this manual.

Service note:------------------------------------------------------------

Dear OM, if you desire to correspond on a technical or

by a qualified technician with proper test equipment. Attempting service or alignment without factory authori zation, may void the warranty. When operated properly, the transceiver can give years of service without requiring realignment. The informa tion in this section gives some general service proce dures which can be accomplished without sophisticated test equipment.

operational problem, please make your note short, com plete, and to the point. And PLEASE make it readable.

Please list: Model and serial number.

The question or problem you are having.

Please give sufficient detail to diagnose: other equip ment in the station, meter readings and anything you feel might be useful in attempting diagnosis.

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 pur chase showing the date of sale.

Caution:

Do not pack the equipment in crushed newspapers for

shipment! Extensive damage may result, during ship

ping.

5-3. CLEANING

The knobs, front panel and cabinet of the transceiver are likely to become soiled after extended use. The knobs should be removed from the transceiver and cleaned

with a neutral soap and warm water. Use a neutral soap (not harsh chemicals) and damp cloth to clean the cabi

net and front panel.

5-4. MICROPROCESSOR BACK-UP LITHIUM BATTERY REPLACEMENT

Lithium battery replacement should be performed by an authorized TRIO-KENWOOD service facility; either your TRIO-KENWOOD dealer, or the factory, since this unit contains CMOS type circuitly.

Note:

When the lithium battery is replaced, the microprocessor must be reset, using the procedure on page 35.

5-5. ORDERING SPARE PARTS

When ordering replacement or spare parts for your equipment, be sure to specify the following:

Model and serial number of your transceiver. Schematic number of the part. Printed circuit board number on

which the part is located, part number and name, if

known, and quantity desired. Part numbers for most re placement parts is contained in the service manual (avai lable as an option from your dealer).

5-6. ADJUSTMENTS

5-6-1. Cover removal

For each of the upper and lower cases, remove four screws as shown in the illustration. Be careful of the speaker wiring on the upper case.

Cautions:

1. Before removing the cover, turn the DC power sup ply's power switch OFF and disconnect the power ca ble.

2. Do not pinch wiring when opening or closing covers.

Notes:

The following cautions pertain for the adjusting points.

1. Never touch adjustment points other than those indi

cated by the instructions.

2. When adjusting or cutting a part, avoid contact with

nearby parts.

Final unit

5-6-2. Low power output

Adjust VR4 on the Final unit to the desired power level. Adjustment is possible up to 60W with the TM-2570A, 40W with the TM-2550A/2550E and 20W with the TM-3530A/2530A.

5-6-3. Microphone gain

VR7 for microphone gain control.

5-6-4. DTMF level

Adjust VR1 (X60-1280-10) to the desired level.

5-6-5. Sidetone and beeper level

The autopatch sidetone level during and beeper level transmit are adjustable. As the volume is advanced, the

level increases.

1. Adjust the VOL control to your normal listening level.

2. With the PTT pressed any key on the keyboard switch depressed, adjust VR2.

5-6-6. RF power meter

Adjustment is required after adjusting the low power out put. VR4 for RF power meter.

Call sign monitor test pins

Microprocessor reset pins

5-6-7. TO (Timer Operated) scan timer

The scan timer is factory preset at approximately 5 se conds. This can be adjusted from 3 to 15 seconds.

1. Place the SCAN switch to TO.

2. Turn the SQL control fully counterclockwise to open the squelch.

3. Press the M.CH switch to select memory mode.

4. Initiate scan by pressing the SC key.

5. Adjust VR1 (X53-1440-10) to the desired delay.

5-6-8. Open channel search step size selection

(TM-3530A/2570A/2550A/2530A only)

Cut the diode D22 to change the open channel search step size for channel linkage from 1 5 kHz to 20 kHz (from 20 kHz to 40 kHz with the TM-3530A) steps.

Note:

When the diode (D22) is cut, reset the microprocessor using the procedure on page 15.

Bottom view

5-6-9. Microphone UP/DWN step size and scan

step size selection (TM-2550E only)

The microphone UP/DWN step size and scan step size can be changed to 1 2.5 kHz by cutting D12 on the con trol unit (X53-1440-10). However, frequency entry by use of the numeric keypad is still possible in either 5 kHz or 12.5 kHz steps.

Note:

When the diode (D12) is cut, reset the microprocessor using the procedure on page 1 5.

5-6-10. Microprocessor reset pins

When the microprocessor reset using the procedure on page 15 is unable or the lithium battery is replaced, short these two pins while depressing the PS key.

5-6-11. Call sign monitor test pins

The test pins are short-circuited to monitor the own call

signal when the Call Sign Display option is used. Be careful of noise interfering with the reception due to this operation.

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7. OPTIONAL ACCESSORIES

The following accessories are available for more sophisticated operation of your transceiver.

7-1. TU-7 TONE UNIT

(TM-3530A/2570A/2550A/2530A

only)

38 CTCSS tone frequencies can be selected from the front panel of the radio by using the TONE FREQUENCY selector. The selected tone is displayed in the LCD dis play.

Accessories:

1. Hexagonal boss

2. Machine screw

3. Cable assembly.....................(E31-3150-05)

4. Foam spacer.........................(G13-0826-04)

5. Instruction manual............(850-8045-10)

Installation procedure Caution:

Before installation be sure to disconnect the power cable, or damage may result to the radio or tone unit.

unit (X53-1440-10) and replace it with the hexagonal boss.

and install the spacer on top of IC5 and IC6, as shown

by the dotted line in the figure. © Connect the cable assembly to the TU-7 tone unit. © Remove the remaining backing from the foam spacer.

Position the tone unit as shown and secure it to the

chassis with the supplied machine screw.

Note; Only one screw is needed.

shown in the figure.

For details on operation of the TU-7 subaudible tone en

coder please refer to section 4-6-2 on page 20.

* The output level of the tone encoder has been factory

adjusted, and should not require further adjustment.

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

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

(J32-0791-05)

(N35-2604-41)

..........

......

1 pc.

2 pcs. 1 pc. 1 pc.

1 copy

7-2. MU-1 MODEM UNIT

Installation of the MU-1 unit permits the DCL system operation.

Accessories:

1. Hexagonal boss

2. Machine screw

3. Cable assembly................(E31-31 51-05)

4. Foam spacer

5. Instruction manual

Installation procedure Caution:

Before installation, be sure to unplug the power cable, or

damage may result to the radio or modem unit.

cover.

the control unit (X53-1440-10), and install the hexa gonal boss in its place.

and install the spacer on the right end of IC2, as

shown by the dotted line in the figure. ® Connect the cable assembly to the MU-1 modem unit. © Remove the remaining backing from the foam spacer.

Place the MU-1 unit as shown in the figure and secure

it with the supplied machine screw. (Note only one

tion.

For details on operation of the DCL system please refer

to section 4-8 "DCL SYSTEM" on page 23. * If the modem unit (MU-1) is not installed you will be

able to program the DCL system, but no DCL signals will be transmitted or decoded.

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

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

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

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

(J32-0791-04)

(N35-2604-41)...........2 pcs.

(G1 3-0826-04)

(850-8046-10)........... 1 copy

...........

..........

.........

1 pc.

IC6 IC5 0

MU-1 Modem unit

(D-

TU-7 Tone unit

7-3. VS-1 VOICE SYNTHESIZER UNIT

The operating frequency, DCL access code, call sign

data, or subaudible tone data may be easily recalled by pressing the front panel VOICE switch.

Accessories:

1. Tapping screw

2. Instruction manual

Installation procedure Caution:

Before installation, be sure to disconnect the power cord, or damage may occur to the voice unit or to the radio.

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

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

(N89-3006-46) 4 pcs. (B50-4035-00)

..........

1 copy

• Talk speed selection

Speed is factory set at "standard" talk speed. Three dif ferent speeds can be selected.

The place in which a jumper wire to be placed.

Installation area

0 Remove the four screws securing the top cover.

Note:

When removing the top cover, be careful not to da mage the speaker wires. You must unplug the speaker cable.

Jumpe^^-^^^^^ place

2 3

Speed

Std.

speed

X X

30%

more than

Std.

60%

more than

Std.

O O

Symbol (O) denotes the place in which a jumper wire is

placed.

Note:

When placing the jumper, solder carefully.

• Voice output level adjustment

Voice output level is factory adjusted. This level may be

readjusted with VR1 if desired.

7-4. OTHER ACCESSORIES

■ PS-50 Heavy duty DC power supply

May be used with the TM-3530A/2570A/2550A/

2550E/2530A for stable operation.

(D Connect the 3-pin blue connector to the correspond

ing blue jack onthe VS-1 as shown.

(D Connect the 8-pin plug of the cable harness to the

corresponding jack of the VS-1 as shown.

® Secure the VS-1 to the chassis with 3 of the supplied

self-tapping screws.

0 Reconnect the speaker wire, and replace the top cover

to complete the installation.

Notes:

• Language selector switch

Switch SI selects either the English (EN) or Japanese (JA) language.

■ PS-430 DC power supply

May be used with the TM-3530A/2550A/2550E/

2530A for stable operation. (Not for TM-2570A)

PS-430

■ KPS’7A DC power supply

(U.S.A. only)

May be used with the TM-3530A/2530A.

■ SP-430 External speaker

The SP-430 is an attractive, compact external speaker. This low-distortion speaker provides clear reproduction

of the high-quality audio obtained from the transceiver.

■ MC-85 Microphone (8 pin)

The MC-85 is a unidirectional high-class electret con denser microphone provided with the output selective switch, audio level compensation circuit, low cut filter, le vel meter, PTT and LOCK switches. An 8-pin cable is provided, with optional cables, up to three outputs are possible.

MC-85 Unidirectional electret

condenser microphone

SP-430

■ SP-50 Mobile speaker (8 i2)

Compact and smart high quality external speaker pro

vides flexibility of installation for maximum convenience.

SP-50

SP-41 external speaker (4 il)

■ MC-80 Microphone (8 pin)

The MC-80 is an omnidirectional electret condenser mi crophone provided with UP/DOWN switches, volume ad justment for output level, PTT and LOCK switches, and built-in pre-amplifier.

MC-80 Omnidirectional electret

condenser microphone

■ MC-60A Microphone (8 pin)

The zinc die-cast base provides high stability, and the

MC-60A is complete with PTT and LOCK switches, UP/ DOWN switches, an impedance selector switch and a built-in pre-amplifier.

SP-40

MC-60A Unidirectional dynamic

microphone

MC-55 Mobile microphone (8 pin) CD-10 Call sign display

The MC-55 provides UP/DOWN switches, LED display for switching transmit or receive, adjustable microphone gain, automatic receive returning circuit (approx. 5 min utes) and many functions.

MC-55 Electret condenser microphone

■ MC-48 Autopatch UP/DOWN hand

microphone (8 pin)

The MC-48 is 16-key auto-patch UP/DOWN micro

phones with PTT switch. Encodes 16 autopatch tones. UP/DOWN switches provide step frequency change, or initiate band scan in the appropriate direction, if held de pressed momentarily.

The CD-10 stores the call sign of the calling station in its

memory and displays it on an LCD display. Call signs of up to 20 of the most recently calling stations are stored.

Allowing the operator to quickly check for and return any

call.

CD-10

AC-10 AC adaptor for CD-I 0

PG-2N DC power cable

■ PG-3A 15A DC line noise filter

MC-48

■ MC-42S Up/Down hand microphone

MC-42S is handy dynamic microphone with PTT switch and UP/DWN switches.

MC-42S

■ MB-10 Mobile mount

The mobile mount MB-10 allows easy installation and re moval of the TM-3530A/2570A/2550A/2550E/2530A.

May be used with the TM-3530A/2550A/2550E/ 2530A to suppress ignition noise. (Not for use with

TM-2570A.)

■ SW-200A/200B SWR/POWER meter

(supplied with a coupler)

SW-200A supplied with SWC-1. SW-200B supplied with SWC-2. Selectable Peak-reading/RMS. SWR/ POWER meters cover 1.8 ~ 150 MHz (SW-200A), 140

~ 450 MHz (SW-200B) in range of 0 ~ 20/200W, full

scale for base station use.

SW-200A/200B

MB-10

■ SW-100A/100BSWR/POWER meter

Compact and lightweight SWR/POWER/VOLT meters cover 1.8 ~ 150 MHz (SW-100A), 140 ~ 450 MHz (SW-1OOB) in range of 1 50W full scale for mobile use.

SW-100A/100B

■ SWT-1 Antenna tuning unit

The SWT-1 (2m band) is an antenna tuning unit designed for use in conjunction with an SWR/POWER meter to al low efficient transmission. This unit is especially con venient for monitoring SWR, using a KENWOOD SWR/

POWER meter.

SWT-1

8. REFERENCE

8-1. ANTENNA

8-1 -1. Fixed station

Various types of fixed station antennas are commercially available. Select your antenna according to available space and intended application. Transceiver performance depends largely on the type of antenna used. For fixed station operation there are

Yagi antennas

ground plane antennas (omnidirectional) and Yagi anten nas (unidirectional). The Yagi antenna is suitable for DX (Long distance) operation or communication with a spe cific party.

8-1-2. Mobile

Various types of antennas for VHF mobile operation are available.

@7' ^

Roof top system

Front fender

Installation for mobile operation.

Roof side system

----

Trunk lid system

Note:

For gutter-mount installation, the antenna bracket must be grounded to the car body as shown below. Attach the antenna securely, referring to the antenna installation in structions provided with the antenna.

8-2. MOBILE INSTALLATION

8-2-1. Noise reduction

In motor vehicles, noise is generated by the ignition sys tem. Other sources of noise include the wiper and heater motors. Although the transceiver is equipped with a noise blanker to minimize ignition noise, it is imperative that some preventive measures be taken to reduce the noise to the lowest possible level.

a. Antenna location selection

Since ignition noise is generated by the vehicles engine,

the antenna must be installed as far from the engine as

possible.

coupled to one another at DC and low frequencies, but are isolated at high frequencies. By connecting these parts using heavy, braided ground straps, ignition noise can be reduced. This connection is called "bonding".

c. Use ignition suppressor cable or suppressor spark

plugs

Noise can be reduced by using spark plugs with internal resistors, or resistive suppressor ignition cable.

d. Battery power connection

It is recommended that battery power be supplied direct ly to the transceiver from the battery terminals.

b. Bonding

The component parts of motor vehicles, such as the en gine, transmission, muffler system, accelerator, etc., are

8-2-2. Battery capacity

The power system of a motor vehicle is comprised of a battery and an alternator (which generates power while the engine is running) to supply current to loads or to charge the battery. Since the transceiver draws high current during transmit, care should be excersised so the power system is not overloaded. When using the transceiver, the following

points should be observed from the viewpoint of battery

Caution:

Disconnect the transceiver before jump-starting or be

fore charging the battery.

maintenance:

a. Turn the transceiver OFF when the lights, heater, wip

ers and other high-draw accessories are used.

b. Avoid transceiver operation when the engine is not

running.

c. If necessary, use an ammeter and/or a voltmeter to

check battery condition.

Model TM-3530A/2570A/2550A/2550E/2530A

Serial No._____________________________________

Date of Purchase Dealer

__________________________

______________________________

KENWOOD OORPORATION

Sh.onogi Shibuya Building. 17-5 2-chome Shibuya Shibuya-ku, Tokyo 150 Japan

KENWOOD U.S.A. CORPORATION

2201 E Dominguez Street, Long Beach, California 90810 U.S.A.

KENWOOD ELECTRONICS DEUTSCHLAND GMBH

Rembrucker Str 15. 6056 Heusenstamm, West Germany

KENWOOD ELECTRONICS BENELUX N.V.

Mechelsesteenweg 418 B-1930 Zaventem. Belgium

KENWOOD ELECTRONICS AUSTRALIA PTY LTD

(INCORPORATED IN N SW.)

4E Woodcock Place, Lane Cove. N.S.W. 2066 Australia

Kenwood TM-3530A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

1. FEATURES

2. SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS

2-2. ACCESSORIES

3. INSTALLATION AND CONNECTION

3-1. INSTALLATION

3-1-1. Precautions

3-1 -2. Power supply

3-1-3. Mounting bracket

3-2. CONNECTION

3-2-1. Precautions

3-2-2. Fixed station

B. Connection of another DC source

3-2-3. Mobile A. Wiring on installation on the car.

B. Ignition noise

3-2-4. Antenna

4. OPERATION

4-1. CONTROLS AND THEIR FUNCTIONS

4-1-1. Front panel

4-1-2. Rear panel

4-1-3. Microphone

4-2. RECEPTION

4-3. TRANSMISSION

4-3-1. Precautions:

4-4. MEMORY

4-4-1. Microprocessor memory back-up

B. Microprocessor reset

4-4-3. Memory input

4-4-4. Paired channels

4-5. SCAN

4-4-5. Priority channel select

4-5-1. Memory scan from the keyboard

4-5-3. Scan direction

4-5-4. Scan speed

4-5-5. Scan lockout (Skip)

4-5-6. Scan release

4-6. REPEATER

4-6-1. Automatic repeater offset

4-5-7, Priority channel scan (Alert)

4-6-2. Tone frequency

1. Setting

2. Release

4-7-1. Telephone number programming

4-8-1. DCL system description

Control signals for CHL operation

4-8-3. Digital code entry

on □ OD

4-8-4. Code squelch

4-8-5. Channel linkage

□ non

□ n □ on

□ o □ on

on □ □

□ noon

4-8-7. Reset and return

Remarks

5. MAINTENANCE AND ADJUSTMENT

5-1. GENERAL INFORMATION

5-2. SERVICE

5-3. CLEANING

5-4. MICROPROCESSOR BACK-UP LITHIUM BATTERY REPLACEMENT

5-5. ORDERING SPARE PARTS

5-6. ADJUSTMENTS

5-6-2. Low power output

5-6-3. Microphone gain

5-6-4. DTMF level

5-6-5. Sidetone and beeper level

5-6-6. RF power meter

5-6-10. Microprocessor reset pins

5-6-11. Call sign monitor test pins

7-1. TU-7 TONE UNIT

(TM-3530A/2570A/2550A/2530A

only)

7-3. VS-1 VOICE SYNTHESIZER UNIT

7-4. OTHER ACCESSORIES