Kenwood TM-3530A User Manual

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)..........

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(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.

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:

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:

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.

+ 32 hidden pages

Kenwood TM-3530A 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