Kenwood TH-27A User Manual

144 MHz FM TRANSCEIVER

TH-27A/27E

111

z a

430/440 MHz FM TRANSCEIVER

TH-47A/47E

INSTRUCTION MANUAL

KENWOOD CORPORATION

CAUTION THE MEMORY IS MAINTAINED BY A RECHARGEABLE SECONDARY LITHIUM BATTERY. WITH THE BATTERY CASE REMOVED, THE MEMORY IS RESET TO ITS INI TIAL STATE AFTER ABOUT 20 DAYS. A FULLY DIS CHARGED BATTERY WILL REQUIRE APPROX. 10 HOURS TO REACH FULL CHARGE AFTER INSTALLING A NiCd BATTERY PACK OR AN EXTERNAL POWER SUPPLY.

Press the power

switch for longer

than 0.3 second

to turn the trans ceiver on or off.

FCC WARNING This equipment may generate or use radio frequency energy. Changes or modifications to this equipment

may cause harmful interference unless the modifica tions are expressly approved in the instruction man

ual. The user could lose the authority to operate this

equipment if an unauthorized change or modification

is made.

CONTENTS

1. BEFORE OPERATION

2. SPECIFICATIONS and ACCESSORIES

3. BATTERY PACK ...................................................... 6

4. OPERATION

4-1 OPERATING CONTROLS ................................. 8

4-2 RECEIVER OPERATION

Receiver Operation Frequency Selection Step Size selection

Programmable VFO Tuning Limits 4-3 TRANSMITTER OPERATION 4-4 MEMORY

Microprocessor Memory Back-up

Microprocessor Initialization

Memory Channel

Memory Contents

Memory Entry

Memory Channel Recall

Memory Shift

4-5 SCAN ............................................................ 23

Scan Options

VFO/Memory Channel Scan

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

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

Hold/Resume Programming Band Scan Programmable Band Scan MHz Scan Memory Channel Scan

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

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

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

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

18 19

4 4

CALL Scan

Memory Channel Lockout Priority Alert Function

4-6 REPEATER OPERATION

Transmitter Offset Reverse Function Tone and CTCSS Operation

Autopatch Operations 4-7 DTMF MEMORY

4-8 DTSS ........................................................... 33

DTSS Code

DTSS Code Selection

Using the DTSS function

Using DTSS with a Repeater 4-9 PAGING

Paging Code Memories

Setting the Paging Codes

Paging Transmission (Calling) Paging Reception (Wait)

Code Lockout 4-10 TONE ALERT SYSTEM 4-1 1 BATTERY SAVER 4-12 AUTOMATIC POWER OFF

4-13 CLOCK ........................................................ 43

5. BLOCK DIAGRAM and SCHEMATIC DIAGRAM

..................................................... another sheet

6. MAINTENANCE

In Case of Difficulty

7. OPTIONAL ACCESSORIES

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

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

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

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

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

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

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

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

42 42

1. BEFORE OPERATION

Thank you for purchasing this new transceiver.

IMPORTANT

Please read this instruction manual carefully before placing your transceiver in service. CAUTION Long transmission or extended operation in the HI

power mode might cause the rear of this transceiver to get warm. Do not place the transceiver where the heat sink ( rear panel ) might come in contact with plastic or vinyl surfaces.

Use of an external antenna for fixed station is recommended.

SAVE THIS INSTRUCTION MANUAL .

This Instruction Manual covers the following models; TH-27A; 1 44MHz FM transceiver

TH-27E: 1 44MHz FM transceiver

(U.K.and European version)

TH-47A; 440MHz FM transceiver

( U.S.A. and Canadian version) TH-47A: 430MHz FM transceiver (Other market) TH-47E: 430MHz FM transceiver

(U.K.and European version)

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.

2. SPECIFICATIONS and

ACCESSORIES

2-1. SPECIFICATIONS

GENERAL

U.S.A. Version

FREQUENCY

RANGE (MHz)

ANTENNA IMPEDANCE

OPERATING TEMPERATURE

POWER REQUIREMENTS

CURRENT DRAIN

13.8VDC (Ext.Power Supply) H

7.2VDC (Battery) H Transmit mode L Transmit mode EL Receive mode with no signal

Battery Save mode

DIMENSION(WxHxD)

D1MENSI0N( Projection Included)

MICROPHONE INPEDANCE

OUTPUT

POWER

U.K.and Europe 144 to 146

Other market

MODE

DC IN(nominal) BATTERY PACK

GROUND

WEIGHT

TRANSMITTER

H (13.8VDC) more than 5W

H (7.2VDC) Approx. 2.5W

TH-27A/E

144 to 148

-20°C~ +60°C(-4“F~140'’F)

7.2 V~ 16 VDC(13.8 VDC)

6.3 V~ 16 VDC(7.2VDC)

Approx. 1.5A

Approx. 1A

Approx. 0.5A Approx. 0.12A Approx. 60mA Approx. 1 7mA

49.5 X 124.7 X 38.0mm 57x 138.7x39.7mm

TH-47A/E 438 to 450 430 to 440

430 to 440

or 438 to 450

F3E(FM)

SOP

Approx. 1.5A

Approx. 1A

Approx. 0.8A Approx. 0.1 5A Approx. 65mA Approx. 17mA

Negative

360g

2kP

Approx. 1.5W

Approx. 0.5W

Approx. 20mW

TH-27A/E

MODULATION

MAXIMUM FREQUENCY DEVIATION

SPURIOUS RADIATION

RECEIVER

CIRCUITRY

INTERMEDIATE FREQUENCY 1 st IF

INTERMEDIATE FREQUENCY 2 nd IF

SENSITIVITY (12dBSINAD)

SQUELCH SENSITIVITY

SELECTIVITY -6dB

SELECTIVITY -60dB

AUDIO OUTPUT POWER

(10% distortion)

NOTES;

1. Circuits and rating are subject to change without notice, due to development in technology.

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

45.05 MHz 58.525 MHz

Reactance

± 5kHz

less than - 60dB

double conversion super

heterodyne

455 kHz

less than

-16dBp

(0.16pV)

less than - 20dBp(0.1 pV)

more than 12kHz

less than 28kHz

more than 200 mW

(across load)

TH-47A/E

less than

- 15dBp

(0.18pV)

2-2. ACCESSORIES

Unpack your transceiver carefully and confirm that the

accessories listed below are included in the box. Antenna (TH-27A/27E) T90-0420-XX

(TH-47A/47E) T90-0421-XX Belt Hook Hand Strap Rubber Cap

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

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

J29-0459-04 J69-0312-04

B09-0324-03 ........... 1

NiCd Battery Pack(PB-1 3) ......... W09-0563-05 .......... 1

Battery Charger(BC-1 4)

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

for U.S.A. and Canadian version (120V)

W09-0565-XX

for European version (220V) for U.K.version (240V) for Oceania.version (240V)

W09-0569-XX W09-0568-XX W09-0567-XX

for other market (1 20/240V) W09-0566-X X Instruction Manual B62-0046-XX 1

Warranty Card ...........................................................

(U.S.A.,Canada,and European version only) After unpacking

Shipping container: Save the boxes and packing in the event your unit needs to be transported for re mote operation, main tenance, or service.

..........

......

...........

1 1

copy

......

3. BATTERY PACK

■ Ni-Cd BATTERY PACK (PB-13)

This battery pack has not been charged at the factory in order to provide you with the greatest number of charge/discharge cycles. You must charge the battery before use. The battery pack will require several charge/discharge cycles before you can expect to see the maximum operating period between charges. If the

battery will be stored for greater than 2 months it should be recharged before use.

■ RECHARGING

Insert the charge plug from the charger (BC-1 4) into the receptacle on the top of the transceiver. Then plug the charger into the AC line. Do not allow the battery to charge for greater than 1 5 hours. The use for life and battery performance will be reduced if you exceed the recommended charge period.

NOTE Recharging should be done within an ambient

temperature between 5°C ~ 40°C (4rp ~ 104°F).

Reharging performed out of this range may not fully charge the battery.

■ INSTALLING THE BATTERY PACK

Insert the battery pack into the transceiver until it locks in place. To remove the battery pack slide the Release button and

pull the pack.

RELEASE button

■ BATTERY VOLTAGE LEVEL METER

The meter indicates the relative battery voltage during transmit.

Recharge or replace the batteries when the level reaches

the low indicator.

NiCd Battery pack

Fully charged

Fully discharged

_________

----

L..7

■ ■

Approximate battery condition

OPERATING TIME

L EL

0.8 5.5

13.5

0.8 4.5

TH-27A

TH-27E

TH-47A

TH-47E

PB-13

Alkaline B.

Manganese B.

PB-13

Alkaline B.

Manganese B.

H M

2 2.5

- -

2 3 6.5

2 2.5

2 2.5 3 6

• 1 minute transmission. 3 minutes reception, AF output

0.2 W/8 n.

• Battery saver function on.

CAUTION

The display indicator flashes and the POWER switch will not work when the battery starts to go flat. When this happens, recharge or replace the battery.

We recommend use of the NiCd battery pack for long transmission or extended operation.

Manganese batteries (except Alkaline manganese batter

ies) is available for Low or EL position.

■ MANGANESE or ALKALINE BATTERIES

Load 6 X R6 (AA) manganese or alkaline batteries in series in the optional battery case(BT-B). (Be sure to observe the polarities.) (We recommend use of high perfomance manganese batteries.)

Be sure the pack and transceiver are locked together.

Manganese or Alkaline batteries

New batteries

___________________

____

Need to change batteries

_________,

LZZZ..\Sy zzrrz-.zr

i:::y

jgg

■ ■ ■

Approximate battery condition

4. OPERATION

4-1. OPERATING CONTROLS

0 Antenna connector

Connect the antenna that is supplied to this connector. Twist to lock,

d) DC IN terminal

This terminal is used for an external power supply. Input voltage is 1 3.8 VDC nominal. The center is the + side and the sleeve is the — side.

NOTE You should turn the power switch OFF when connect ing a power source to this terminal. Pay close atten

tion to polarity.

Use the KENWOOD PG-2W or PG-3F optional cable for connection.

0 MIC jack This jack is used for connection of an external micro

phone. The use of an electret type microphone is recommended. Input impedance is 2kfl and the DC

voltage on this terminal is Approx. 4 V (MAX 3.5 mA).

0 SP jack

This jack is used to connect an external speaker or earphone. The recommended impedance is 8il.

0 ON AIR indicator

On whenever the transceiver is in the transmit mode.

(D VOL control

Rotating the control further clockwise will increase the volume. 0 SQL(Squelch) control This control is used to select the desired Squelch threshold level. 0 Tuning control This control is used to select the desired transmitter /receiver frequency, MHz step. Memory Channel, Fre quency Step, Tone Frequency, Scan Direction, etc.

0 MONI switch When operating in the CTCSS (Tone Squelch) mode you

can use this key to determine if the frequency is in use before transmitting. Pressing this key will disable the CTCSS function as long as the key is held depressed.

(D PTT (Push To Talk) switch

Press this switch whenever you wish to transmit.

0 POWER switch

Press for longer than 0.3 second to turn the transceiver ON or OFF.

0 LAMP key This switch is used to control the night lamp on the LCD

display. The lamp will turn itself OFF automatically 5 seconds after the last key operation. Pressing the key within 1 0 seconds of pressing the F key will light the lamp on the LCD display until pressing this key again.

0 TONE/TONE SEL key

Except European version; This key is used to activate the subaudible tone encoder.

European version; This key is used to transmit the 1750Hz repeater access tone whenever this key is

depressed.

U.S.A., Canada, or with optional TSU-7; Pressing the key within 10 seconds of pressing the F key will switch to the tone frequency selection mode. The Tuning control can then be used to select the desired tone frequency. (D CALL/C. SCAN key

Press this key to activate the call channel function.

Pressing the key within 1 0 seconds of pressing the F key will start or stop CALL channel scanning. 0 DTSS/PAG key

This key is used to activate the DTSS function.

Pressing the key within 1 0 seconds of pressing the F key will turn the PAGING function on or off. (D LOW/CLOCK key

This key is used to switch the transmit output power;

Medium(M)/Low(L)/Economic-Low(EL)/High (no

indicator).

Pressing the key within 1 0 seconds of pressing the F key

will switch alternately between the frequency display and

CLOCK display.

0 1/AL key

This key is used to turn memory channel 1 on or off. Pressing the key within 1 0 seconds of pressing the F key will check Memory Channel 1 at approx. 5 second intervals. If the channel is busy, a beep will sound (ALERT).

(D 2/CTCSS key

This key is used to turn memory channel 2 on or off.

Pressing the key within 1 0 seconds of pressing the F key

will turn the CTCSS function on or off. 0 3/T.ALT key

This key is used to turn memory channel 3 on or off.

Pressing the key within 1 0 seconds of pressing the F key will turn the TONE ALERT function on or off.

0 F key

This key is used to activate control of the functions. The

"F" indicator will turn ON or flash for approximately 1 0

seconds. You must press the desired function key before

the indicator turns off.

0 4/PROG-1 key

This key is used to turn memory channel 4 on or off.

Pressing the key within 1 0 seconds of pressing the F key

will select the programmable scan 1 MODE.

0 5/PROG-2 key

This key is used to turn memory channel 5 on or off.

Pressing the key within 1 0 seconds of pressing the F key

will select the programmable scan 2 MODE.

0 6/MEMO key

This key is used to turn memory channel 6 on or off. Pressing the key within 1 0 seconds of pressing the F key

will select the memory scan MODE.

0 M/TX.S key

This key is used to store the displayed data into memory. Pressing the key within 1 0 seconds of pressing the F key will turn the TX.STOP function on or off.

QnD ^

VM. SCAN

(SCANl

0 7/SEEK key

This key is used to turn memory channel 7 on or off.

Pressing the key within 1 0 seconds of pressing the F key will select SEEK operated scan. (D 8/CAR key This key is used to turn memory channel 8 on or off.

Pressing the key within 10 seconds of pressing the F key

will select CARRIER operated scan. 0 9/TIME key

This key is used to turn memory channel 9 on or off.

Pressing the key within 1 0 seconds of pressing the F key will select TIME operated scan. 0 ENT / LOCK key

This key is used to switch to the direct keyboard

frequency entry mode.

Pressing the key within 1 0 seconds of pressing the F key

will deactivate all functions except the PTT, POWER,

MONl, LAMP. F then ENTER (LOCK) keys.

If you press the F key for longer than 1 second, then press the ENT key the Tuning control lock function will

turn on or off.

(D SHIFT/REV/* key

Pressing the key will cause the radio to shift from one offset direction to the other, i.e.+ to — to simplex where no indicator shows, [—to — — for European

version (TH-47E)].

Pressing the key within 1 0 seconds of pressing the F key will reverse the transmit/receive frequencise during repeater operations. If you have selected simplex this key will not function.

(D O/L.OUT key

This key is used to turn memory channel 0 on or off. Pressing the key within 1 0 seconds of pressing the F key will turn the memory channel lock out function on or off.

0 MHz/STEP/# key

This key is used to select the tuning rate of the Tuning control. When the MHz indicator is lit, the Tuning control will cause the transceiver to increase or decrease in 1 MHz steps.

During VFO operation pressing the key within 10 seconds of pressing the F key will select the desired frequency step. 0 SCAN/VM.SCAN key This key is used to start or stop scanning.

Pressing the key within 1 0 seconds of pressing the F key will start or stop VFO/Memory scan.

■ NOT DISPLAYED FUNCTION

• Press the M key , then the key below.

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

Key

M, CALL

M, MONI

Function

Displayed data in call

channel.

DTMF memory entry

mode.

Refer to

P.21 4-4-5

P.31 4-7

Clear the displayed

M, ENT

memory channel data.

P.21 4-4-5

• Press the M key for longer than 1 second, then the key below.

Key

Function Refer to

Enter the upper limit

M1Sec,4

frequency of

P.24 4-5-4

programmable scan 1

Enter the upper limit

M1Sec,5

frequency of

P.24 4-5-4

programmable scan 2

Enter the lower limit

M1Sec,7

frequency of

P.24 4-5-4

programmable scan 1

Enter the lower limit

MISec, 8

frequency of

P.24 4-5-4

programmable scan 2

Key Function

FISec, MONI

FI Sec, DTSS

FISec, LOW

FISec, 1

FI Sec, 3

Recall the DTMF

memory

DTSS Code Selection

Battery Saver function

on or off

Audio confirmation

BEEP on or off

Tone Alert sound ( Pi

Pi Pi or Pul Pul Pul)

Displays the upper

F1Sec,4

limit frequency of the programmable scan 1

Displays the upper

FISec, 5

limit frequency of the programmable scan 2

Displays the lower

F1Sec,7

limit frequency of the programmable scan 1

Referto

P.32 4-7

P.33 4-8-2

P.42 4-11

P.15 4-2

P.41 4-10

P.24 4-5-4

Press the F key for longer than 1 second and then the key below.

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

Key

Function

Refer to

Display sthe lower

F ISec, 8

limit frequency of the

P.24 4-5-4

programmable scan 2

F ISec, ENT

F lSec + 0

Tuning control lock

Automatic Power Off

function on or off

P.11 ENT key

P.42 4-12

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

Key

DTSS and power

selection (450/750mS)

Function Refer to

DTSSdelay time

P.34 4-8-4

DTMF delay time ( 2

5 and power ON

sec) on or off

P.30 4-6-4

Memory recall mode

6 and power ON

selection ( 1 or 2

P.22 4-4-6

digits)

Key

8 and power ON

9 and power ON

M and power ON

ENT and power

SHIFT and power

Function

Enter the lower limit

of the programmable

VFO tuning limit.

Enter the upper limit

of the programmable

VFO tuning limit.

MEMORY RESET

VFO RESET

Switching the Alert

methods

Refer to

P.17 4-2-4

P.19 4-4-2

P27. 4-5-10

Display panel

-----------LO

iTMigpIiEpi

lE_L

0 LOCK

(D TX.S

+ — s

(European version)

(DD

0DT

(D CT

CK T)

:.s =

- s] F

^ E

1 D TC

sh O O'O O

TIME

. Gon Q

airA

® ®® ®

LOCK ON when LOCK function is active. ON when TX.STOP function is active. This level nneter indicates the relative receive input strength or battery voltage level during transmit.

Displays the selected transmitter offset

direction.

During split channel operation both +

and — indicator light.

ON when Reverse function is active. ON when Tone function is active. ON when DTSS function is active. ON when CTCSS function is active. On when Tone Alert System is active. The indicator will flash when a signal is received.

OFF E

APO/1

® <2)

T,4

(0) i^lMIllMEMOl

(Jl) fSEEiniWIiTiHEl

® E L M

r;'(

888m:

p8888

83:38

0 AL

0 Hon

(J2) Hoff

(S) APO

®88

★

Displays the selected scan mode. Flashes when scanning. Displays the selected scan hold/resume condition. Displays the selected output power,i.e. Economic-low, Low, Medium, and no indicator Hi. On when squelch is open. Displays the operating frequency to the nearest kHz, the frequency step size, or the tone frequency. Flashes during VM SCANNING and MHz scanning. ON in paging mode. ON in CLOCK mode. ON when Priority Alert system is active. ON when the ON TIMER function is active.

ON when the OFF TIMER function is

active.

ON when BATTERY SAVER function is

active.

ON when AUTOMATIC POWER OFF function is active.

Displays the current Memory Channel

number.The star indicator is on when the

Memory channel will be skipped during Memory Channel Scan.

ON whenever the F key is depressed.

4-2. RECEIVER OPERATION

Audio confirmation is provided whenever a front panel

key is depressed. You can disable this function by pressing the F key for longer than 1 second, then pressing

the 1 key.

4-2-1. Receiver Operation

Connect the battery pack and the supplied antenna. Set the controls as follows:

1. Press the power switch for longer than 0.3 second.

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

4-2-2. Frequency Selection

• Direct Keyboard Frequency Entry

1. Press the ENT key to select the ENTER mode.

CeFQ

TH-27 series

TH-47 series

The frequencies shown above are the default frequencies after a microprocessor reset. If the display shows incomplete data or you think the displayed frequency is in error, reset the microprocessor

Memory Initialization on page 1 9.

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

3. Rotate the tuning control to selected an open channel.

4. Rotate the SQL control clockwise until the noise just

disappears and the BUSY indicator turns off. This point is known as the Squelch Threshold point.

2. Within 1 0 seconds of pressing the ENT key enter the frequency from most significant digit to the least significant digit.

CTD

CID

[SEKI

lUU c c

I I I.JU

B APO

Before entering 1 kHz digit this

The transceiver change frequency after 1 kHz digits have been entered (1 kHz digit is not displayed).

If 1 kHz digit indicator flashes, enter the 1 kHz digit

frequency.

If you should make an error before entering all digits, press the ENT key twice , and reenter all digits.

indicator may flash.

In 12.5 kHz ,or 25kHz step size, direct frequency selection will be completed in the 1 0 kHz digit. When you enter the following keys for the 1 0 kHz digit. 1 kHz and 1 00 Hz digit frequencies are automatically selected the list below.

(10 kHz digit)

key.

0 1 2 25 3 4

Frequency

(kHz]

00 5

12.5 6 62.5

37.5

{10 kHz digit)

key.

8 9

Frequency

[kHz]

87.5

4-2-3. Step Size Selection

To select the desired tuning or scan step size use the

following procedure:

1. Press the F key momentarily, then press the MHz/STEP key. The current frequency step size will be displayed.

CZD

STEP

( MHZ )

2. Rotate the Tuning control until the desired tuning step

size appears in the display.The frequency step is

indicated in the chart below.

5±:;10i=>1 5i:>20±^12.5:^25±^5

3. To complete the programming of the step size you can press the MHz/STEP key.

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

5,10,15,20 to 12.5,25

0,5,10,15 20,25,30,35 40,45,50,55 60,65,70,75

80,85,90,95

For example: Assume you are presently displaying a frequency of 439.920 MHz and had previously selected a 20 kHz step size. If you were to change the step size to 1 2.5 kHz the display would then read 439.925 MHz.

0 25 50

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

12.5 10 25

37.5 50

62.5 75

87.5

20 30 50 60 70 80

4-2-4. Programmable VFO Tuning Limits

The radio provide the capability of programming the VFO tuning range, in 1 MHz band segments, as well a providing a separate programmable band scan function. (See section 4-5.) For example you could tell the trans ceiver that you only wish to tune the 1 44.000 MHz and

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