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19-1004.fm Page 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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19-1004.fm Page 2 Tuesday, August 3, 1999 9:11 AM FEATURES Your Radio Shack MTX-103 VHF Ma- High/Low Power Button — lets you rine Transceiver lets you transmit and save power by selecting a suitable receive on all United States and inter- transmitting power for long or short dis- national channels in the VHF marine tances. band, as assigned by the International Telecommunication Union (ITU). It Battery Low Indicator — shows the also provides ten receive-only chan- battery pack’s condition. ne
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19-1004.fm Page 3 Tuesday, August 3, 1999 9:11 AM The Marine Radiotelephone Service is CAUTION under the jurisdiction of the Federal RISK OF ELECTRIC SHOCK. ! Communications Commission (FCC). DO NOT OPEN. Any adjustments or alterations which CAUTION: TO REDUCE THE RISK OF would alter the performance of the ELECTRIC SHOCK, DO NOT REMOVE transceiver’s original FCC type accep- COVER OR BACK. NO USER-SERVICE- tance or would change the frequency ABLE PARTS INSIDE. REFER SERVIC- determining method
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19-1004.fm Page 4 Tuesday, August 3, 1999 9:11 AM TABLE OF CONTENTS Preparation ........................................................................................................... 5 Charging the Battery Pack ............................................................................... 5 Connecting the Antenna .................................................................................. 6 Using an Earphone .........................................................................
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19-1004.fm Page 5 Tuesday, August 3, 1999 9:11 AM PREPARATION Follow these steps to charge the bat- CHARGING THE tery pack. BATTERY PACK Caution: Do not use the transceiver The MTX-103 operates on a built-in re- while the charger is connected. chargeable battery pack (supplied). You must charge the battery pack with 1. If the battery pack is attached to the supplied battery charger before the transceiver, make sure VOL- you use it the first time and when BAT UME is turned fully counterclock-
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19-1004.fm Page 6 Tuesday, August 3, 1999 9:11 AM Cautions: • To prevent permanent battery power loss, never charge the bat- teries in an area where the tem- perature is above about 80°F. The charger does not operate at all at temperatures below 32°F or 1. Position the BNC antenna con- above 113°F. nector over the antenna jack on • Never use any other charger to the top of the transceiver. recharge the transceiver’s battery 2. Place the slots in the antenna’s pack. This could permanently conn
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19-1004.fm Page 7 Tuesday, August 3, 1999 9:11 AM USING AN EARPHONE USING THE WRIST STRAP To listen privately or to hear better in a noisy area, remove the plug from the Clip the supplied wrist strap to the wrist SPK jack on the right of the transceiver strap tab, as shown. Then simply slip and plug a monaural earphone (such the strap over your hand. as Cat. No. 33-175) into the jack. This automatically disconnects the internal speaker. USING THE BELT CLIP USING AN EXTERNAL SPEAKER/MICROPH
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19-1004.fm Page 8 Tuesday, August 3, 1999 9:11 AM OPERATION 5. Use the channel thumbwheels to RECEIVING select the desired channel. The left wheel selects the first digit of 1. Turn SQUELCH fully counterclock- the channel number; the right wise. wheel selects the second digit. 2. Turn on the radio by turning VOL- 6. Set 1W/5W to select the desired UME clockwise. Adjust VOLUME to output power. the desired listening level. •Use 1W for normal communica- 3. Adjust SQUELCH to eliminate tion. back
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19-1004.fm Page 9 Tuesday, August 3, 1999 9:11 AM 7. The USA/INT’L switch must be set using the channel thumb- to USA if you are in United States wheels. See “Channel Assign- waters. If you are outside the ments” for the receive-only USA, set the switch to INT’L. weather channels. Although the channel numbers 9. To turn off the radio, turn VOLUME are the same, the frequencies are counterclockwise until it clicks. different for USA and international channels. See “Channel Assign- Note: To get
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19-1004.fm Page 10 Tuesday, August 3, 1999 9:11 AM • After making contact on Channel TRANSMITTING 16, switch to a different channel to continue the call — Channel 16 When making a call using a marine must be left open for other calls. transceiver, you must follow these call- See “Channel Assignments.” ing procedures. • Channel 16 is the universal calling and safety channel. Leave the Calling Another Boat radio set to Channel 16, unless a call is in progress on a different 1. Turn on the radio
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19-1004.fm Page 11 Tuesday, August 3, 1999 9:11 AM 4.Say, “Mayday-Mayday-Mayday! Making an Emergency Call This is (your call sign and name of Emergency calls are made on Channel your boat), (your call sign and 16 because it is monitored by marine name of your boat), (your call sign radio owners. In many areas, the and name of your boat), Mayday Coast Guard monitors Channel 16 24- (name of your boat).” hours a day. 5. Then give the following informa- tion: There are three levels of emergency c
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19-1004.fm Page 12 Tuesday, August 3, 1999 9:11 AM CHANNEL ASSIGNMENTS Each of the 78 two-way communication Also, be sure to observe the ship-to- channels and 18 receive-only channels ship and ship-to-shore assignments of is reserved for a specific type of trans- the channels. mission. Misuse of a channel is a viola- tion of FCC regulations. The USA and international marine channels share the same channel num- You can listen to any channel. But, with bers. They do not, however, always use the
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19-1004.fm Page 13 Tuesday, August 3, 1999 9:11 AM IINSTALLED CHANNELS AND FREQUENCIES USA VHF Marine Channels Frequency (MHz) Frequency (MHz) Channel Channel TX RX TX RX 01 156.050 156.050 68 156.425 156.425 02 – 160.700 69 156.475 156.475 03 – 160.750 70 156.525 156.525 04 – 160.800 71 156.575 156.575 05 156.250 156.250 72 156.625 156.625 06 156.300 156.300 73 156.675 156.675 07 156.350 156.350 74 156.725 156.725 08 156.400 156.400 77 156.875 156.875 09 156.450 156.450 78 156.925 156.925 10
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19-1004.fm Page 14 Tuesday, August 3, 1999 9:11 AM International VHF Marine Channels Frequency (MHz) Frequency (MHz) Channel Channel TX RX TX RX 01 156.050 156.650 68 156.425 156.425 02 156.100 160.700 69 156.475 156.475 03 156.150 160.750 70 156.525 156.525 04 156.200 160.800 71 156.575 156.575 05 156.250 160.850 72 156.625 156.625 06 156.300 156.300 73 156.675 156.675 07 156.350 160.950 74 156.725 156.725 08 156.400 156.400 77 156.875 156.875 09 156.450 156.450 78 156.925 161.525 10 156.500
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19-1004.fm Page 15 Tuesday, August 3, 1999 9:11 AM Comprehensive VHF FM Marine Radiotelephone Channels Operating Frequency (MHz) Channel Type Traffic Ship/Ship Ship/Shore Ship TX Coast RX Designations 1 156.050 160.650 International Only – Yes 2 157.100 160.700 International Only – Yes 3 157.150 161.750 International Only – Yes 4 156.200 160.800 International Only – Yes 5 156.250 160.850 International Only – Yes 6 156.300 – Safety Yes No 7 156.350 160.950 International Only – Yes 7A 156.350
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19-1004.fm Page 16 Tuesday, August 3, 1999 9:11 AM Operating Frequency (MHz) Channel Type Traffic Ship/Ship Ship/Shore Ship TX Coast RX Designations 60 156.025 160.625 International Only RX Only RX Only 61 156.075 160.675 International Only RX Only RX Only 62 156.125 160.725 International Only RX Only RX Only 63 156.175 160.775 International Only RX Only RX Only 64 156.225 160.825 International Only RX Only RX Only 65 156.275 160.875 International Only Yes Yes 65A 156.275 156.275 Port Ops Yes
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19-1004.fm Page 17 Tuesday, August 3, 1999 9:11 AM CARE AND MAINTENANCE Your Radio Shack MTX-103 VHF Marine Transceiver is an example of superior de- sign and craftsmanship. The following suggestions will help you care for the trans- ceiver so you can enjoy it for years. Keep the transceiver dry. If it gets wet, wipe it dry immediately. Liq- uids might contain minerals that can corrode the electronic circuits. Handle the transceiver gently and carefully. Dropping it can damage circuit boards
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19-1004.fm Page 18 Tuesday, August 3, 1999 9:11 AM IF YOU HAVE FCC NOTICE PROBLEMS This device complies with Part 15 of FCC Rules. Operation is subject to the If your transceiver does not operate following two conditions: properly, check the following items first. If you still have a problem, bring 1. This device may not cause harm- the transceiver to your local Radio ful interference. Shack store for assistance. 2. This device must accept any inter- Important: Repair and/or adjustment ferenc
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19-1004.fm Page 19 Tuesday, August 3, 1999 9:11 AM SPECIFICATIONS GENERAL Channels....................................All USA and International Channels Included, Plus Ten Weather Channels and CH90, 91, 95, 96, 97 for International Usage Frequency Method ........................................................................ Phase Lock Loop ETR Synthesizer Antenna Impedance.......................................................... 50 ohm Power Input...........................................
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19-1004.fm Page 20 Tuesday, August 3, 1999 9:11 AM NOTES 20
