Radio Shack MTX-103 User Manual

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19-1004.fmPage 1 Tuesday, August 3, 1999 9:11 AM

Cat. No. 19-1004

OWNER’S MANUAL

Please read before using this equipment.

MTX-103

VHF Marine Transceiver

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FEATURES

Your Radio Shack MTX-103VHF Marine Transceiver lets you transmit and receive on all United States and international channels in the VHF marine band, as assigned by the International Telecommunication Union (ITU). It also provides tenreceive-onlychannels for weather information.

Your transceiver has the following features:

USA/International Channel Switch

— lets you quickly switch from the USA channel mode to the International channel mode.

Emergency Channel 16 Switch — lets you immediately switch to Channel 16, the universal marine emergency channel.

Weather Channel Switch — lets you select from 10 weather channels.

PLL (Phase-LockedLoop)-Con-trolled Circuitry— provides accurate and stable channel selection.

Adjustable Squelch — helps eliminate noise between transmissions.

High/Low Power Button — lets you save power by selecting a suitable transmitting power for long or short distances.

Battery Low Indicator — shows the battery pack’s condition.

Transmit and Receive Indicators — light when you transmit or receive.

Removable, Rechargeable Battery Pack — lets you use one battery pack while you charge another (additional packs available).

Supplied Battery Charger — conveniently recharges your transceiver’s battery pack.

Speaker and Microphone Jacks — let you use an earphone or external speaker or microphone to help ensure understandable communication in noisy areas.

For your records, we recommend you record your transceiver’s serial number in the space provided. The serial number is on the back of the transceiver.

Serial Number __________________

©1995 Tandy Corporation. All Rights Reserved.

Radio Shack is a registered trademark used by Tandy Corporation.

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CAUTION

!

 

 

 

RISK OF ELECTRIC SHOCK.

 

DO NOT OPEN.

 

 

 

 

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER OR BACK. NOUSER-SERVICE-ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

Warning: To prevent fire or shock hazard, do not expose this product to rain or moisture.

This symbol is intended to alert you to the presence of uninsulated dangerous voltage within the product’s enclosure that might be of sufficient magnitude to constitute a risk of electric shock. Do not open the product’s case.

This symbol is intended to inform

!you that important operating and maintenance instructions are in-

cluded in the literature accompanying this product.

FCC LICENSE

REQUIRED

The Federal Communications Commission (FCC) requires you to have a license before you operate this transceiver. You must complete and submit FCC Form 506 — a copy of Form 506 is enclosed. Furthermore, you are required to understand Part 80 of FCC Rules and Regulations.

The Marine Radiotelephone Service is under the jurisdiction of the Federal Communications Commission (FCC). Any adjustments or alterations which would alter the performance of the transceiver’s original FCC type acceptance or would change the frequency determining method are strictly prohibited.

Replacement or substitution of crystals, transistors, ICs, regulator diodes or any other part of a unique nature, with parts other than those recommended by Radio Shack, may cause violation of the technical regulation of the FCC Rules or violation of type acceptance requirements of the rules.

Before operating the radiotelephone, you must obtain your license. It is illegal to transmit without the appropriate license which can be obtained by submitting a completed FCC Form 506 (included) to the FCC. Furthermore, you are required to understand Part 80 of the FCC Rules and Regulations prior to the operation of your radiotelephone. It is the user’s responsibility to see that this unit is operating at all times in accordance with theFCC Rules and Regulations.

FCC Form 506-A,Temporary Operating Authority, Ship Radio Station, is also included with your transceiver. Complete and post this temporary permit in accordance with the instructions.

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TABLE OF CONTENTS

 

Preparation ...........................................................................................................

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Charging the Battery Pack ...............................................................................

5

Connecting the Antenna ..................................................................................

6

Using an Earphone ..........................................................................................

7

Using an External Speaker/Microphone ..........................................................

7

Using the Wrist Strap .......................................................................................

7

Using the Belt Clip ...........................................................................................

7

Operation ..............................................................................................................

8

Receiving .........................................................................................................

8

Transmitting ...................................................................................................

10

Calling Another Boat ...............................................................................

10

Making a Ship-to-ShoreCall ...................................................................

11

Making an Emergency Call .....................................................................

12

Channel Assignments .......................................................................................

13

Installed Channels and Frequencies .............................................................

14

USA VHF Marine Channels ....................................................................

14

International VHF Marine Channels ........................................................

15

Comprehensive VHF FM Marine Radiotelephone Channels ..................

16

Care and Maintenance .......................................................................................

18

If You Have Problems ....................................................................................

19

FCC Notice .....................................................................................................

19

Specifications .....................................................................................................

20

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PREPARATION

CHARGING THE

BATTERY PACK

The MTX-103operates on abuilt-inrechargeable battery pack (supplied). You must charge the battery pack with the supplied battery charger before you use it the first time and when BAT lights steadily.

You can charge the battery pack while it is detached from or while it is attached to the transceiver.

To attach the battery pack, slide it onto the transceiver until the latch clicks.

To remove the battery pack, push the battery pack latch in the direction of the arrow, then slide the battery pack off the transceiver.

Follow these steps to charge the battery pack.

Caution: Do not use the transceiver while the charger is connected.

1.If the battery pack is attached to the transceiver, make sure VOLUME is turned fully counterclockwise so the transceiver is off.

2.Pull out the CHG PWR jack plug on the bottom of the battery pack. Plug the charger’s barrel plug into theCHG PWR jack, then connect the charger to a standard AC outlet.

Note: Charging time is 14 to 16 hours.

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Cautions:

To prevent permanent battery power loss, never charge the batteries in an area where the temperature is above about 80°F. The charger does not operate at all at temperatures below 32°F or above 113°F.

Never use any other charger to recharge the transceiver’s battery pack. This could permanently damage your transceiver or the battery pack.

Important: This transceiver uses a rechargeablenickel-cadmiumbattery pack. At the end of the battery pack’s useful life, it must be recycled or disposed of properly. Contact your local, county, or state hazardous waste management authorities for information on recycling or disposal programs in your area. Some options that might be available are municipalcurb-sidecollection,drop-offboxes at retailers, recycling collection centers, and mailback programs.

CONNECTING THE

ANTENNA

Caution: To prevent damage to your transceiver, you must connect an antenna before you operate it.

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1.Position the BNC antenna connector over the antenna jack on the top of the transceiver.

2.Place the slots in the antenna’s connector over the tabs on the antenna jack, squeeze the base of the antenna, and push down and turn the antenna’s base clockwise until it locks into place.

Instead of the supplied antenna, you can connect an optional antenna. The BNC antenna jack on your transceiver makes it easy to connect a variety of antennas, such as an external mobile antenna or an outdoor base antenna, available at your local Radio Shack store.

Caution: Never connect an antenna that is not specifically tuned for the transceiver’s frequency range(156.025–162.275MHz).

Warning: Use extreme caution when installing or removing a base station antenna. If it starts to fall, let it go! It could contact overhead power lines. If the antenna touches the power line, contact with the antenna, mast, cable, or guy wires can cause electrocution and death! Call the power company to remove the antenna. Do not attempt to do so yourself.

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USING AN EARPHONE

To listen privately or to hear better in a noisy area, remove the plug from the SPK jack on the right of the transceiver and plug a monaural earphone (such as Cat. No.33-175)into the jack. This automatically disconnects the internal speaker.

USING AN EXTERNAL SPEAKER/MICROPHONE

An external speaker/microphone (such as Cat. No. 19-310)can make it easier to use the transceiver when you clip it to your belt. Remove the plugs from theMIC andSPK jacks. Then plug the speaker/microphone’s connector into the jacks. This automatically disconnects the internal speaker.

USING THE WRIST

STRAP

Clip the supplied wrist strap to the wrist strap tab, as shown. Then simply slip the strap over your hand.

USING THE BELT CLIP

You can use the supplied belt clip to make the transceiver easier to use when you are on the go. Use the two supplied screws to attach the belt clip to the transceiver. Slide the belt clip over your belt or waistband.

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OPERATION

RECEIVING

1.Turn SQUELCH fully counterclockwise.

2.Turn on the radio by turning VOLUME clockwise. AdjustVOLUME to the desired listening level.

3.Adjust SQUELCH to eliminate background noise between transmissions. Wait until there is no signal on the channel, then slowly turnSQUELCH clockwise until the background noise stops.

4.Raise the protective cover.

5.Use the channel thumbwheels to select the desired channel. The left wheel selects the first digit of the channel number; the right wheel selects the second digit.

6.Set 1W/5W to select the desired output power.

Use 1W for normal communication.

Use 5W for emergency or long distance communication.

Note: In a marina or harbor, try to establish communications using the1-wattsetting before switching to the5-wattsetting.

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7.The USA/INT’L switch must be set toUSA if you are in United States waters. If you are outside the USA, set the switch toINT’L. Although the channel numbers are the same, the frequencies are different for USA and international channels. See “Channel Assignments.”

8.Set the NORM/CH16/WX switch for the desired channel.

Use NORM to go to the channel selected by the channel thumbwheels.

Use CH16 to quickly select Channel 16 in an emergency, regardless of the channel thumbwheel setting.

Use WX to monitor the available24-hourweather channels. Select the desired channel

using the channel thumbwheels. See “Channel Assignments” for the receive-onlyweather channels.

9.To turn off the radio, turn VOLUME counterclockwise until it clicks.

Note: To get the best communication range:

Orient the antenna vertically.

Move the transceiver away from shielding caused by nearby structures.

Raise the transceiver as high as possible above the surrounding terrain.

Try an external antenna.

Cautions:

Receiving excessively strong signals might damage the transceiver. Do not use the transceiver close to a base station antenna or within 20 inches of another unit.

Transmission without an antenna connected might cause damage to the transmitter.

If the MTX-103is accidentally subjected to water spray, immediately wipe it with a soft cloth. If the unit is contaminated with salt water, wipe it with a soft cloth moistened with fresh water. Then dry the radio.

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TRANSMITTING

When making a call using a marine transceiver, you must follow these calling procedures.

Channel 16 is the universal calling and safety channel. Leave the radio set to Channel 16, unless a call is in progress on a different channel.

Listen to Channel 16 for at least 2 minutes before making a call on it (to be sure the channel is not already in use).

Press the push-to-talkbutton to talk; the TX indicator should light. Release it to listen; the RX indicator should light when a transmission is received.

When you are ready for the other party to talk, end your sentence by saying “over.”

When you are ready to end communication, say “(Your call sign or name of your boat), out.”

When in a marina or harbor, try first to make calls using the 1W (1- watt) power setting. If you do not receive a response, switch to the5W (5-watt)setting.

If you do not receive a response to a call after 30 seconds, wait at least 2 minutes before trying again. If you receive no response after the second try, wait at least 15 minutes before trying again.

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After making contact on Channel 16, switch to a different channel to continue the call — Channel 16 must be left open for other calls. See “Channel Assignments.”

Calling Another Boat

1.Turn on the radio, and select Channel 16.

2.Hold the transceiver about 3 inches from your mouth, and press the push-to-talkbutton.

3.Say “(Name of boat you are calling), this is (your call sign or name of your boat).”

4.Release the push-to-talkbutton and listen for a response.

5.After establishing communication, switch to a ship-to-shipchannel. See “Channel Assignments.”

6.When the call is complete, say “(Your call sign or name of your boat), out.”

7.Switch back to Channel 16.