Kenwood TH-42A User Manual

144 MHz FM Transceiver 430/440 MHz FM Transceiver

TH-22A/22AT/22E TH-42A/42AT/42E

INSTRUCTION MANUAL

KENWOOD CORPORATION

©B62-0501-10(K, P, E, T, X, M) 12 11 10 09 08 07 06 05 04 03 02

Models Covered by this Manual:

• TH-22A :

144 MHz FM transceiver (Australia/ General)

• TH-22AT

144 MHz FM transceiver (U.S.A./ Canada/ General)

• TH-22E

• TH-42A

144 MHz FM transceiver (Europe) 430 MHz FM transceiver (Generai)

One or more of the following statements may be applicable to this equipment.

FCC WARNING

This equipment generates or uses radio frequency energy.

Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made.

• TH-42AT

430 MHz FM transceiver (General) 440 MHz FM transceiver

(U.S.A./ Canada)

• TH-42E

430 MHz FM transceiver (Europe)

The TH-42 series is used for all illustrations, and the 430 MHz band is used for ai! LCD example displays.

Notice to the user:

ATTENTION (U.S.A. Only)

Nickel-Cadmium battery must be recycled or disposed oi properly. State laws may vary

regarding the handling and disposal of Nickel-

Cadmium batteries. Please contact your

Authorized KENWOOD Dealer for more

Ni-Cd

information.

INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY THE FCC

This equipment has been tested and found to comply with the limits for a Class В digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

This equipment generates, uses and can generate radio

frequency energy and, if not installed and used in accorc/ance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that the interference will not occur in a particular installation. If this

equipment does cause harmful interference to radio or television

reception, which can be determined by turning the equipment off

and on, the user is encouraged fo try to correct the interference

by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer for technical assistance.

THANK YOU

We are grateful you decided to purchase this KENWOOD

FM transceiver. The TH-22rTH-42 series of handhelds

were developed to satisfy the requirement for a small

handheld that's simple to operate yet has superior performance across the band. Users of this series of handhelds will discover the transceiver’s Menu Set-up method for feature configuration recently incorporated in other KENWOOD products.

KENWOOD believes that the compact size coupled with the reasonable cost will guarantee your satisfaction with this product.

PRECAUTIONS

Please observe the following precautions to prevent fire,

personal injury, and transceiver damage:

• Do not transmit with high output power for extended

periods. The transceiver may overheat.

• When using an external power supply, connect the

recommended DC cable (option) to the DC IN jack on the transceiver.

• When connecting the transceiver to a cigarette lighter socket in a mobile, use the recommended cigarette lighter cable (option).

• Before recharging a mobile battery, unplug the cigarette lighter cable from the lighter socket. Voltage

spikes sometimes present during charging can damage the transceiver.

• Do not recharge the NiCd battery pack for more than 15 hours (PB-33: 30 hours) with an external power

supply. Switching ON the power supply begins recharging the battery pack automatically.

• Do not expose the transceiver to long periods of direct

sunlight or place the transceiver close to heating appliances.

• Do not place the transceiver in excessively dusty or humid areas, or on unstable surfaces.

• If an abnormal odor or smoke is detected coming from

the transceiver, turn OFF the power immediately.

Contact a KENWOOD service station or your dealer.

• Do not modify this transceiver unless instructed by this manual or by some other approved KENWOOD

communication.

CAUTION: The recommended transceiver duty cycle is 1 minute of transmission and 3 minutes of recaption. Longer transmissions or extended operation in the High power mode may cause the back of the transceiver to get hot. Do not piece the transceiver where the heat sink (rear panel) might come in contact with plastic or vinyl surfaces.

FEATURES ................................................................ 1

ACCESSORIES ......................................................... 1

CONVENTIONS FOLLOWED IN THIS MANUAL _ 2 BATTERY INFORMATION

NiCd BATTERY PACK (PB-32/PB-34)

Recharging ............................................................. 3

Installing/Removing the Battery Pack INSTALLING/REMOVING MANGANESE OR ALKALINE BATTERIES BATTERY VOLTAGE LEVEL BATTERY OPERATING TIME (HOURS)

YOUR FIRST QSO ..................................................... 6

GETTING ACQUAINTED............................................ 7

ORIENTATION ......................................................... 7

KEYS, CONTROLS, SWITCHES,

INDICATORS ......................................................... 8

JAOKS AND OONNECtORS

DISPLAY ................................................................ 10

MENU SET-UP

RECEIVING .............................................................. 13

SWITCHING POWER ON/OFF SQUELCH THRESHOLD LEVEL

SELECTING FREQUENCY STEP SIZE ................ 14

Changes in Displayed Frequencies

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

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

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

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

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

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

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

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

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

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

3 3

4 5 5

13 13

DIRECT KEYPAD FREQUENCY ENTRY

1 MHZ STEP FREQUENCY CHANGE .................. 17

KEYLOCK UNLOCKING ENC/SQL CONTROL

BEEP TONE ON/OFF ............................................. 18

TRANSMITTING

SELECTING OUTPUT POWER

TIME-OUT TIMER (TOT) ........................................ 19

INHIBITING THE TRANSMITTER BUSY FREQUENCY LOCK-OUT

MEMORY CHANNELS ............................................. 21

STORING DATA IN MEMORY................................ 21

Simplex Memory Channels

Split Memory Channels ......................................... 22

RECALLING MEMORY CHANNELS....................... 23

Using the ENC/SQL Control

Using the Keypad

MEMORY ^ VFO TRANSFERS .............................. 23

ERASING MEMORY CHANNELS

CALL CHANNEL

Recalling Call Channel

Changing Call Channel Contents (Simplex) .... 25

Changing Call Channel Contents (Split) ............... 25

CHANNEL DISPLAY FUNCTION

INITIALIZING MEMORY ......................................... 26

VFO Reset (Partial)

Memory Reset (Full) ............................................. 26

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

16 17

19 19

20 20

23 23

24 24 24

25 26

OPERATING THROUGH REPEATERS ................... 27

SAVING POWER

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

TRANSMITTER OFFSETS ..................................... 27

SELECTING OFFSET DIRECTION AUTOMATIC TRANSMIT OFFSET

U.S.A. and Canada Versions

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

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

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

European Version ................................................. 28

Canceling Automatic Offset

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

SELECTING OFFSET VALUES MANUALLY ... 29 REVERSE FUNCTION

TONE ACCESS AUTO PATCH

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

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

Activating the Keypad

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

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

DUAL TONE MULTI-FREQUENCY (DTMF)

MEMORY................................................................. 32

Making DTMF Calls

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

Storing DTMF Numbers ........................................ 32

Confirming Stored DTMF Numbers

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

Transmitting Stored DTMF Numbers .................... 34

Activating DTMF Transmit Hold

SCAN

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

SCAN RESUME METHODS

Time-Operated Scan

Carrier-Operated Scan

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

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

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

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

SELECTING THE SCAN RESUME METHOD .. 36

MEMORY SCAN ..................................................... 37

Locking-Out Memory Channels

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

VFO SCAN .............................................................. 38

CALLA/FO SCAN .................................................... 38

CALL/MEMORY SCAN ........................................... 38

27 28 28

31 31

BATTERY SAVER AUTOMATIC POWER OFF (APO)

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

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

39 39

CONTINUOUS TONE CODED SQUELCH SYSTEM (CTCSS)

SELECTING CTCSS FREQUENCIES

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

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

40 40

USING CTCSS ........................................................ 40

DUAL TONE SQUELCH SYSTEM (DTSS) .............. 41

ACTIVATING DTSS ................................................ 41

STORING DTSS CODES

DTSS AND REPEATERS

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

42 42

PAGE ......................................................................... 43

OVERVIEW ............................................................. 43

PAGE CODE MEMORY........................................... 43

STORING PAGE CODES CALLING

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

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

43 44

RECEIVING ............................................................ 45

Receiving a Call with your Station Code ............... 45

Receiving a Call with a Group Code ..................... 45

PAGE CODE AND REPEATERS LOCKING-OUT CODES

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

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

46 46

AUTO PAGE CANCEL ............................................ 47

OPEN PAGE

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

TONE ALERT............................................................. 48

ACTIVATING TONE ALERT

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

III

REMOTE CONTROL

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

REMOTE CONTROL USING SMC-33 OR SMC-34

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

49 CONNECTING EQUIPMENT FOR REMOTE CONTROL

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

PACKET OPERATION ............................................. 51

MAINTENANCE ........................................................ 52

GENERAL INFORMATION SERVICE SERVICE NOTE

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

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

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

CLEANING .............................................................. 53

TROUBLESHOOTING .............................................. 54

OPTIONAL ACCESSORIES ..................................... 58

INSTALLING OPTIONS ............................................ 60

INSTALLING THE CTCSS UNIT {TSU-8)

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

60 INSTALLING THE SPEAKER-MIC JACK

STRAIN RELIEF...................................................... 61

CONNECTING OPTIONAL EQUIPMENT

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

SPECIFICATIONS .................................................... 63

GLOSSARY QUICK REFERENCE GUIDE

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

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

FEATURES

• Easier to handle due to the thinner profile, smaller size, and lighter weight. Encourages a "take-itanywhere" philosophy.

ACCESSORIES

Before beginning to learn the functions of your

transceiver, check the accessories list below against

equipment received to be sure everything listed is included in your package.

• High power output produced from low input voltage

means the NiCd battery pack is more compact than previous handhelds.

• Innovative Menu Set-up method combines

sophisticated features with simple operation; only

frequently-used keys are placed on the front and side

panels.

ATTENTION! Some transceiver versions are not equipped

with a keypad as standard equipment; however, your dealer can install this optional accessory. Functions requiring the keypad cannot be used if no keypad is installed.

Accessory

Antenna

TH-22

TH-42 Hand strap Belt hook J29-0465-XX

Jack protector cap B09-0335-XX

Cable tie Screws

Washers

NiCd battery pack

PB-32 1 (6 V, 600 mAh)

PB-34 2 (9.6 V, 600 mAh) W09-0825-XX 1 Battery case (BT-9) 2 Battery charger (BC-17)

U.S./Canada W08-0437-XX

Europe (excluding U,K.)

United Kingdom

Australia

General market AC plug adapter 2 El 9-0254-XX 1

Instruction manual

Warranty card (U.s./ Canada/ Europe)

1 Excluding some General market versions.

2 Some General market versions only.

Part Number

T90-0472-XX T90-0473-XX 1

J69-0327-XX 1

J61-0422-XX 1

N35-3004-XX 2

F29-0435-XX 2

W09-0826-XX 1

W08-0440-XX 1

W08-0438-XX 1 W08-0439-XX 1 W08-0441 -XX 1

B62-0501-XX

Quantity

1 1

When you have everything checked out, you are ready for "YOUR FIRST QSO" (page 6}. Review this section and be on the air within minutes. Other sections follow in a logical order to help you efficiently learn the potential of this transceiver.

CONVENTIONS FOLLOWED IN THIS

MANUAL

INSTRUCTION MEANING

WHAT TO DO

The writing conventions described below have been

followed to simplify key stroke instructions and avoid unnecessary repetition. This format is less confusing for the reader. Reviewing the following information now will reduce your learning period. That means less time will be spent reading this manual; more time will be available

for operating.

Note:

► Basic procedures are numbered sequentially to guide you

step-by-step. Additional information pertaining to a step, but not essential to complete the procedure, is provided in bulleted form following many steps for further guidance.

^ Most procedures require that you enter a final key stroke

that acts as a terminator for the procedure. You can. if you

prefer, simply wait for approximately 70 seconds rather

than enter this final key entry.

Press [KEY1] + [KEY2].

Press [KEY1], [KEY21.

Press

[KEY] + POWER ON.

Press IFI (1 s).

Press the keys simultaneously.

Press the keys in sequence.

Press the key while powering the transceiver.

Press the Function key for longer than 1 second.

Press and hold KEY1 down, then press KEY2.

Press KEY1 momentarily, release KEY1,

then press KEY2. With the

transceiver power

OFF, press and hold KEY, then turn ON the transceiver power.

Press and hold the Function key until the "F” indicator on the display begins flashing.

Press [KEY] (1 s).

Press the key for longer than

1 second.

Press and hold

KEY until the function begins.

BATTERY INFORMATION

NiCd BATTERY PACK (PB-32/PB-34)

You must charge the battery pack before you can use it. The pack is delivered uncharged to provide you with the greatest number of charge/discharge cycles. It takes several charge/discharge cycles before achieving the full battery pack capacity. After storing the pack for more than 2 months, recharge it before use.

Recharging

Insert the plug from the BC-17 charger into the DC IN jack on the right side of the transceiver. Then plug the charger AC plug into an AC wall outlet. Do not

charge the battery for more than 15 hours. Exceeding

the recommended charge period shortens the useful

life of the pack and adversely affects battery performance.

Note:

► Recharging should be done within an ambient

temperature between 5°C to 40°C (41°F to 104°F). Recharging outside this range may not fully charge the battery.

K If the entire display is blinking, or if turning PWWVOL

clockwise does not power the transceiver, recharge the battery pack.

^ The BC-17 charger is designed to recharge only PB-32,

PB-34, PB-30 (option), or PB-33 (option). Never use the BC-17 to recharge other types of batteries.

Installing/Removing the Battery Pack

Insert the battery pack into the bottom of the

transceiver, and push in until the tab on the pack

locks in place.

DC IN jack

To remove the battery pack, simultaneously press the tab on the back of the pack while pulling out the pack from the transceiver.

INSTALLING/REMOVING MANGANESE OR ALKALINE BATTERIES

(Some General Market Versions)

A fully-charged NiCd battery pack allows optimum

performance of your transceiver especially for long

transmissions or extended operation. However, when a

NiCd battery pack is not available, use high quality

alkaline batteries. If manganese batteries are used, it is

recommended that transmissions be made only with the "L" or "EL" transmitter output power.

1 To remove the battery case, simultaneously press the

tab on the back of the case while pulling out the case from the transceiver.

Insert 4 AA manganese or alkaline batteries in the case half with metal contacts making sure the

+ and - end of each battery is as shown.

• If replacing batteries, remove the old batteries first by lifting up on each battery end. Never discard old batteries in fire as extremely high temperatures can cause batteries to explode.

Insert the two small alignment tabs on the other half of the case into their matching holes in the case half containing the batteries. Press the case halves together until the tab on the case bottom locks in place.

Open the battery case by simultaneously pressing on the locking tab on the bottom of the case while pulling the two case halves apart.

Locking tab

Note:

Install only alkaline or manganese batteries in the battery case. Installing NiCd batteries in the battery case wilt cause an electrical short that generates heat and damages either the battery case or transceiver.

Remove the batteries from the battery case if your transceiver will not be used for a long time.

Insert the battery case into the bottom of the

transceiver, and push in until the tab on the case

locks in place.

NiCd Battery

(PB-30)

NICd Battery

(PB-32/ 33)

NiCd Battery

(PB-34)

Alkaline Battery

New Battery

■ ■■■

Discharged Battery

■ ■

■ ■■■

■ ■

BATTERY OPERATING TIME (HOURS)

CAUTION: Do not install the battery pack or batteries in a

hazardous environment where sparks could cause an

explosion.

BATTERY VOLTAGE LEVEL

The horizontal bars on the Display show the relative battery voltage while transmitting using "EL" output power. Recharge or replace the batteries as necessary using the accompanying diagrams as reference.

unJ

H3J.C u

APO

Models

TH-22A TH-22AT TH-22E

TH-42A TH-42AT TH-42E

Batteries High

PB-30 PB-32 4 PB-33 8 PB-34

Alkaline

PB-30 PB-32 PB-33 PB-34

Alkaline

5.5 8.5 12

3.5 8.5 18

4.5

3.5

Low

II ^11

8.5 12 17 24

8 12 8 12

• 6 seconds Transmit, 6 seconds Receive, 48 seconds Standby (AF output 0.2 W / 8 ohms)

• Battery Saver ON

Economic Low

"EL"

12 40

24 12 40

YOUR FIRST QSO

If you tend to discard instruction manuals along with the

packaging material....please don’t. The 4 steps below

will get you on the air in your first QSO within minutes to allow you to experience the exhilaration that comes with opening a brand new transceiver.

After spreading the word to your best buddies that you are now "handy-active", settle back in your most comfortable operating chair with this manual and your favorite drink for an hour or two. The time spent will be worthwhile.

1 Install a new set of batteries or a charged battery pack

■^tpage 3}. Holding the provided antenna at its base, twist the antenna onto the BNC connector until you feel the antenna click in place.

2 Turn the PWR/VOL control clockwise to the 11

o'clock position.

3 Turn the ENC/SQL control to select a frequency.

• If accessing a repeater, press [F], [REV] to select a standard positive transmit offset. Repeat to select a negative offset.

• If a subaudible tone is required to access the repeater, see page 30.

4 When the frequency is clear, press [PTT] and begin

communicating.

• Release [PTT] to receive.

CAUTION: Transmitting with the supplied antenna near other

electronic equipment can interfere with that equipment Also, transmitting near a regulated power supply not specified may cause the power supply to output an extremely high voltage that could damage both your transceiver and any other equipment connected to the supply.

GETTING ACQUAINTED

ORIENTATION

control

©ENC/SQL

control

The purpose of the following sections is to describe basic functions. Please refer to later sections for greater detail.

KEYS, CONTROLS, SWITCHES, INDICATORS

(D PWRA^OL (PowerA/olume) control

Turn the control clockwise until it clicks to switch ON the transceiver. To switch OFF the transceiver, turn counterclockwise to OFF.

Turning the control clockwise after switching ON the transceiver increases the volunne.

® ENC/SQL (Encoder/Squelch) control

Select operating frequencies, frequency steps, memory

channels, transmit offsets, Tone frequencies, menu

items, and use to reverse scan direction. Also, use to manually set the receiver squelch threshold level.

(D ON AIR indicator LED

Lights when [PTT] is pressed while a frequency within

the transmit band is selected. ® PTT (Push-To-Talk)

Hold down to transmit. Release to receive.

(S) LAMP

Press to illuminate the display. The display remains lit while [LAMP] is held down. Approximately 5 seconds after releasing [LAMP], the light goes OFF if no other key is pressed. Pressing any key except [LAMP] while the display is lit restarts the 5 second timer. Otherwise,

pressing [LAMP] turns OFF the light immediately. To

latch the light ON, press [F], [LAMP]. The display

remains lit until [LAMP] is pressed again.

(D MONI (Monitor)

Hold down to monitor the operating frequency even when

noise squelch, CTCSS, DTSS, Page, or Tone Alert is

ON. "BUSY" appears on the display while MONI is held

down. Also, use in combination with the ENC/SOL

control to manually set the receiver squelch threshold

level.

Ф F (Function)

Use in combination with dual function keys to select the

alternate key function. Also, use to select Memory

Storage and 1 MHz Step.

Ф VFO

Press to select the VFO.

CD MR (Memory Recall)

Press to select Memory Recall.

(0) CALL Press to recall the Call channel.

<© T/CT (Tone/CTCSS) Press to switch between Tone and CTCSS functions.

® REV (Reverse)

Press to reverse the transmit and receive frequencies. This is particularly useful when monitoring a repeater to check the signal strength of a station on its transmit

frequency.

® Keypad

Use to input numeric data such as frequencies, memory channel numbers, etc. Also, use to input numbers when sending DTMF digits and to control DTSS, Page, and

DTMF memory functions.

JACKS AND CONNECTORS

® BNC connector

Attach the supplied antenna.

® External microphone/speaker jacks Connect an external microphone, speaker or speakermicrophone if desired. When using the transceiver with any of these accessories, take care not to let water enter the speaker jack or microphone jack.

® External DC IN jack Connect the BC-17 wall charger in order to charge the transceiver’s rechargeable battery pack.

Connect the optional PG-2W DC power cable if an

external power supply is used. The supply voltage must be in the range from 5 V to 16 V.

Connect the optional PG-3J cigarette lighter cable when

using a cigarette lighter socket as a power source during mobile operation.

DISPLAY

^nnO

^0 no eiBi

d) "O

Appears when Key Lock is ON. Most keys and the ENC/SQL control are disabled if this function is activated. The ENC/SQL control lock can be bypassed.

(D PAG Appears when Page is ON. Allows you to Page other stations that have the Page function on their transceivers.

® TX.S Appears when Transmit Inhibit is ON. No transmissions

can be made.

® DT

Appears when the Dual Tone Squelch System is ON.

You can use your transceiver for sending and receiving

digitally-addressed transmissions.

(5) R

Appears when the Reverse function is ON. Transmit and

receive frequencies are reversed.

(D T or CT Appears when the subaudible tone encoder ("T") is ON, or when the Continuous Tone Coded Squelch System

("CT") is ON.

® + - E]

Displays the transmit offset direction in relation to the receive frequency.

Displays the operating frequency, frequency step, Tone

frequency, and current menu settings.

Displays the current memory channel selected when

using Memory Recall.

While receiving, displays the relative signal strength of

received signals. While transmitting, displays the relative battery level.

® —

Blinks to indicate the 1 MHz step function is ON.

® cam

Appears when the squelch is open due to a received signal (or noise) that is greater in strength than the squelch threshold level.

Appears when Tone Alert is ON. Flashes when a signal is received.

® S

Appears when Battery Saver is ON.

Appears when the selected memory channel contains data while using Memory Store.

© ★ Appears when the selected channel or Page code is locked-out. While memory scanning, the transceiver does not stop on locked-out channels. During Page operation, the squelch does not open for locked-out codes.

® SB

Appears when the transmit output power is set to Low

("L") or Economic Low ("EL"). Neither indicator appears

when High power is selected.

® APO

Appears when Automatic Power Off is ON.

Appears when [F] is pressed. Indicates that the alternate function of dual function keys can be used now.

MENU SET-UP

Many of the features on the transceiver are selected by means of a configurable menu system. This system reduces the number of keys and controls without eliminating important features. To change the configuration of a Menu item, use the following procedure:

1 Press [CALL] + POWER ON to enter Menu Set-up.

2 Turn the ENC/SQL control to select the menu item to

be changed.

• The current selection appears.

3 Each time [CALL] is pressed, the different selections

available appear on the display.

4 Press any key other than [CALL], [LAMP], or [MONI]

to exit Menu Set-up and save the selection viewed last on the display.

The table below lists the configurable menu items:

Menu No. Description

02 03 04

05 Transmit Inhibit ON/OFF OFF 06

07 08 09 10 Open Page

12 13

1 TH-22AT (U.S.A. and Canada), TH-22E only

Note: While accessing Menu Set-up, waiting for longer than 10 seconds without entering any data ends the set-up operation automatically and returns you to the previous display.

Battery Saver ON/OFF

Automatic Power Off (APO) ON/OFF

Scan Resume:

Time-operated (TO), Carrier-operated (CO)

Keypad Beep

Tuning Encoder Lock ON/OFF Automatic Transmit Offset ON/OFF ONI

DTSS/Page Transmit delay 350 ms / 550 ms DTMF Transmit Hold (2 s)

Auto Page Cancel

Channel Display

Time-out Timer (TOT)

Busy Frequency Lock-out

Selections Default

TO/CO

ON/OFF

ON/OFF ON/OFF ON/OFF ON/OFF

30/60/ 90/ 180/ 900 s

ON/OFF

Reference Page

ON ON

OFF

350 ms 42 and 46

OFF OFF 47 OFF 47 OFF

900 S 19

OFF

39 39

36 18

20 18 28

RECEIVING

SWITCHING POWER ON/OFF

To switch ON your transceiver, turn the PWRA/OL control clockwise and set it at the 11 o’clock position. Various indicators, including a receive frequency, appear on the display. Due to the automatic squelch feature, no sound will be heard from the speaker until you receive a call.

Use the same control to adjust the volume more precisely while receiving your first call, or press [MON!] and adjust the PWR/VOL control to set the background noise to a comfortable level. Pressing [MONI] always allows you to listen to activity on the selected frequency as long as this key is held down.

To switch OFF the transceiver, turn the PWR/VOL control counterclockwise until it clicks at the OFF position.

SQUELCH THRESHOLD LEVEL

The receiver squelch is automatically controlled by the

transceiver’s microcomputer based on the measured

noise level. However, you can override the microcomputer setting, if you wish.

1 Turn the ENC/SQL control to select a frequency that

is not busy.

2 Press [F], [MONI].

• The current squelch threshold level appears.

• The default is "5".

C 0>

J IL

3 Turn the ENC/SQL control to select the desired level

(0 to 9).

• 0: Selects lowest threshold level (squelch open).

• 9: Selects highest threshold level.

4 Press any key other than [LAMP] or [MONI].

SELECTING FREQUENCY STEP SIZE

Choosing the correct step size when operating is essential in order to select your exact operating frequency with the ENC/SQL control. The best step size is the largest step that will still allow you to use the

ENC/SQL control to select all frequencies on which you plan to operate. Using the best step size reduces the time required to select new frequencies with the

ENC/SQL control; operating becomes easier.

Pb.

3 Turn the ENC/SQL control to switch between

available frequency steps.

• As you turn the ENC/SQL control clockwise or counterclockwise, the following selections appear:

Version

TH-22

Canada

U.S.A.

Australia

Europe V-

General

1 Press [VFO] to select the VFO.

2 Press [F], [T/CT].

• The current frequency step appears.

Default (kHz)

TH-42

12.5

5 kHz

25 kHz 12.5 kHz

-<—>-

10kHz 15 kHz

e*- 20 kHz

4 Press any key other than [LAMP] or [MONI].

• The new step size is stored, and the previous display is restored.

Note: The step size can be set separately for the VFO, Call channel, and memory channels.

Changes in Displayed Frequencies

Changing between step sizes may result in a change of the displayed frequency. When a change occurs, and by how much, is shown in the accompanying charts.

For example, assume 144.995 MHz is displayed with a 20 kHz step size selected. Changing to a 25 kHz step size alters the displayed frequency to 144.975 MHz.

12.5 or 25 kHz ^ 5, 10, 15 or 20 kHz

Step Size Step Size

Displayed Frequency

(10 kHz/ 1 kHz/ 500 Hz)

00 00

12.5

Displayed Frequency

(10 kHz/1 kHz)

5, 10, 15 or 20 kHz 12.5 or 25 kHz

Step Size Step Size

Displayed Frequency

(10 kHz/ 1 kHz)

00, 05, 10, 15 20, 25, 30, 35 40, 45, 50, 55

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

Displayed Frequency

(10 kHz/ 1 kHz)

00 25 50 75

37.5 50 50

62.5 75

87.5 80

20 30

60 70

DIRECT KEYPAD FREQUENCY ENTRY

This function is available only on transceivers equipped with a DTMF keypad. Entering the desired frequency directly via the keypad can be the fastest way of selecting a different frequency especially when a small frequency step has been selected. If the new frequency is hundreds of kHz or more from the current frequency, and you don’t have the new frequency stored in any memory channels, use direct entry.

Note:

10 kHz

key

Frequency 10 kHz Frequency

(kHz) key (kHz)

0 00 5 50 1 12.5 6 62.5 2

7 3 37.5 8 87.5 4 37.5 9 87.5

1 Press [VFO] to select the VFO.

2 Enter the desired frequency using the numeric keys.

• For versions with receiver coverage wider than 10 MHz, the 10 MHz digit must be entered.

Otherwise, begin entering from the 1 MHz digit.

• When the current step size is 5 kHz, 10 kHz, 15 kHz, or 20 kHz, enter numeric values down to

the 1 kHz digit. Enter either 0 or 5 for the 1 kHz digit.

• When the current step size is 12.5 kHz or 25 kHz,

entering the 10 kHz digit completes frequency setting. The 10 kHz and subsequent digits are set according to which key is pressed for the 10 kHz digit as shown in the chart.

•

• Except for the 1 kHz digit, entering a digit that is

outside the allowable range causes the nearest digit within range to be displayed. For the 1 kHz digit, pressing 10] to [4] selects "0" and pressing [5] to

[9] selects "5".

V If any key other than [0] to [9J, [MONI], or [LAMP] is

pressed, or if the next entry is not made within 10

seconds, the previous frequency will be restored.

> If [VFO] is pressed while entering the frequency, the new

data is accepted for the digits entered and the previous data remains unchanged for the digits not yet entered.

y Turning the ENC/SQL control while entering the frequency

cancels the new numeric data entered, and raises or

lowers the previously displayed frequency.

1 MHZ STEP FREQUENCY CHANGE

KEY LOCK

The 1 MHz Step feature allows rapid frequency excursions up or down the band with a minimum of key strokes.

1 Press [VFO] to select the VFO.

2 Press [F].

• The bar located under the 1 MHz digit begins

blinking.

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3 Turn the ENC/SQL control to select the desired MHz

digit.

4 Press [F] to restore the previous frequency step.

Occasionally, you may want to lock the keys and the

ENC/SQL control to prevent accidentally changing any

transceiver settings. Press [F], [MR].

• The "key" icon appears when lock is ON.

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• Each time this key combination is pressed, the keys and the ENC/SQL control toggle between locked and

unlocked.

The following keys function normally even when Key

Lock is ON:

[MONI] [LAMP] [PTT] [T/CT] {Only TH-22E/TH-42E with 1750 Hz selected)

Also, microphone PF keys function normally with Key

Lock activated; however, no new functions can be

assigned to the PF keys until Key Lock is turned OFF.

Refer to page 50 for identification of the microphone PF

keys and further information.

UNLOCKING ENC/SQL CONTROL BEEP TONE ON/OFF

If you only want to lock the keys but not the ENC/SQL

control when Key Lock is activated, that is possible too.

1 Press [CALL] + POWER ON to select Menu Set-up.

2 Turn the ENC/SQL control to select Menu No. 06.

• The current status of ENC/SQL control lock appears.

• The default is "OFF".

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3 Press [CALL] to select "ON" or "OFF".

• OFF: Locks ENC/SQL control with keys.

• ON : Does not lock ENC/SQL control with keys.

4 Press any key other than [CALL], [LAMP], or [MONI]

to exit Menu Set-up.

The transceiver beeps each time you press a key on the transceiver with the exception of [MONI], [LAMP], and [PTT]. Pressing [PTT] generates a beep if your transmit frequency is outside the transmit band. Beep volume can be varied by turning the PWR/VOL control.

If you prefer, you can cancel the beep for silent

operation.

1 Press [CALL]+ POWER ON to enter Menu Set-up.

2 Turn the ENC/SQL control to select Menu No. 04.

• The current beep status appears.

• The default is "ON".

3 Press [CALL] to select "OFF" or "ON".

• OFF: Disables Keypad Beep.

• ON : Enables Keypad Beep.

4 Press any key other than [CALL], [LAMP], or [MONI]

to exit Menu Set-up.

Note: When Tone Alert is switched ON while the Beep

function is OFF, an audible alarm does not sound when a signal is received.

+ 54 hidden pages

Kenwood TH-42A User Manual

Models Covered by this Manual:

• TH-22A :

• TH-22AT

• TH-22E

• TH-42A

• TH-42AT

• TH-42E

Notice to the user:

CONTENTS

BATTERY INFORMATION

YOUR FIRST QSO

GETTING ACQUAINTED

Ф VFO

^0 no eiBi

RECEIVING

2 Press [F], [T/CT].