Related Manuals for Radio Shack TRC-498
Summary of Contents for Radio Shack TRC-498
- Page 1 21-1598.fm Page 1 Thursday, August 5, 1999 10:52 AM Cat. No. 21-1598 OWNER’S MANUAL Please read before using this equipment. TRC-498 40-Channel CB Mobile Transceiver with Digital Signal Processor...
- Page 2 21-1598.fm Page 2 Thursday, August 5, 1999 10:52 AM FEATURES Your RadioShack TRC-498 Emergency Channel Switch — lets Channel CB Mobile Transceiver is a you quickly switch to Channel 9 so you breakthrough in CB design technolo- can monitor or report emergency situ- gy.
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Page 3: Fcc Information
21-1598.fm Page 3 Thursday, August 5, 1999 10:52 AM Note: To use this CB, you must con- To be safe and sure: nect a mobile or base station antenna. • Never open your CB radio’s case. Your local RadioShack store has a wide variety of antennas. -
Page 4: Table Of Contents
21-1598.fm Page 4 Thursday, August 5, 1999 10:52 AM CONTENTS Installation ......................5 Attaching the Microphone Holder ..............5 Mounting the Transceiver ................5 Connecting an Antenna ................... 6 Connecting the Microphone ................7 Connecting Optional Speakers ................ 8 Using an External CB Speaker ..............8 Connecting a PA Speaker ................. -
Page 5: Installation
21-1598.fm Page 5 Thursday, August 5, 1999 10:52 AM INSTALLATION ATTACHING THE MICROPHONE HOLDER You can connect the microphone hold- er to either side of the transceiver or to another location in your vehicle. To attach the holder to either side of the transceiver, secure the holder to the side using the supplied screws and Note: If you cannot reach behind... -
Page 6: Connecting An Antenna
21-1598.fm Page 6 Thursday, August 5, 1999 10:52 AM Caution: If you use the CB in a vehi- nuts on the bolts, use the supplied cle, mount it securely to avoid damage 6 mm self-tapping screws and to the CB or vehicle or injury to anyone plain washers to secure in the vehicle during sudden starts or... -
Page 7: Connecting The Microphone
21-1598.fm Page 7 Thursday, August 5, 1999 10:52 AM Once you choose an antenna, follow CONNECTING THE its mounting instructions. Then route MICROPHONE the cable to the transceiver and con- nect the cable to the jack on the 1. Press the tab on the side of the back of the transceiver. -
Page 8: Connecting Optional Speakers
21-1598.fm Page 8 Thursday, August 5, 1999 10:52 AM CONNECTING Connecting a PA Speaker OPTIONAL SPEAKERS The PA speaker should have an im- pedance of 8 ohms and be able to han- You can connect your transceiver to an dle at least 5 watts of power, such as external CB speaker and/or a PA (pub- ®... -
Page 9: Using Vehicle Battery Power
21-1598.fm Page 9 Thursday, August 5, 1999 10:52 AM USING VEHICLE USING THE BATTERY POWER TRANSCEIVER AS A BASE STATION Follow these steps to connect the transceiver to vehicle battery power. Although this transceiver is designed mainly for mobile use, you can also use it as a base station with an AC power source. - Page 10 21-1598.fm Page 10 Thursday, August 5, 1999 10:52 AM Follow these steps to install the CB as 3. Connect the transceiver’s black a base station. power wire to the negative (–) ter- minal on the DC power supply. 4. Connect the transceiver’s red wire (with the in-line fuse) to the posi- tive (+) terminal on the DC power supply.
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Page 11: Operation
21-1598.fm Page 11 Thursday, August 5, 1999 10:52 AM OPERATION Caution: To prevent damage to the CB, be sure you connect an antenna and the microphone before you use the CB. Before you use your CB, you should know how to use it effectively and courteously. -
Page 12: Transmitting
21-1598.fm Page 12 Thursday, August 5, 1999 10:52 AM Note: To receive very weak sig- TRANSMITTING nals, turn counterclock- SQUELCH wise. You hear noise between Note: We recommend you try receiv- transmissions, but you also hear ing before you transmit. weak transmissions (those not strong enough to break through a 1. -
Page 13: Using The Digital Signal Processor
21-1598.fm Page 13 Thursday, August 5, 1999 10:52 AM • The (modulation) light SELECTING THE flickers as you speak. If the indi- EMERGENCY CHANNEL cator lights continuously, you are speaking too loudly. If it Important: Channel 9 is reserved for lights dimly, you might be motorist assistance and for reporting speaking too softly. -
Page 14: Using The Pa Amplifier
21-1598.fm Page 14 Thursday, August 5, 1999 10:52 AM USING THE PA 4. To end PA operation, turn the transceiver off. Or, set CB/PA AMPLIFIER for CB communication. Your CB has a built-in PA (public ad- dress) amplifier. With an optional PA speaker, you can turn your radio into a mobile public address system. -
Page 15: Operational Hints
21-1598.fm Page 15 Thursday, August 5, 1999 10:52 AM OPERATIONAL HINTS Like most activities, CB radio has its Business Uses customs and courtesies. The following tips will help you get the most enjoy- • For security officers, a CB is more ment from your CB. -
Page 16: Maximum Range
21-1598.fm Page 16 Thursday, August 5, 1999 10:52 AM MAXIMUM RANGE TRANSMISSION COURTESY The maximum range and quality of CB radio transmissions vary depending Please follow these guidelines of radio on the following conditions: courtesy when using your CB. • The type and quality of antenna •... -
Page 17: Using Common 10-Codes
21-1598.fm Page 17 Thursday, August 5, 1999 10:52 AM USING COMMON 10-CODES Citizen’s band operators and CB radio users have largely adopted the 10-codes for standard questions and answers. These codes permit faster communication and better intelligibility in noisy areas. This table lists codes adopted by the Associated Public-Safety Communications Of- ficers (APCO). -
Page 18: Troubleshooting
21-1598.fm Page 18 Thursday, August 5, 1999 10:52 AM TROUBLESHOOTING If at any time you suspect that your CB is not working as it should, refer to the fol- lowing chart to see if you can eliminate the problem. If these solutions do not solve the problem, do not attempt repairs or adjustment yourself. - Page 19 21-1598.fm Page 19 Thursday, August 5, 1999 10:52 AM Symptom Solution Power connected? Secure connections. Radio does not work at Microphone connected? Secure connections. all. Fuse needs replacing? Replace with identical fuse. See “Replacing the Fuse” on Page 22. CB/PA Cannot select a channel.
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Page 20: Reducing Noise
21-1598.fm Page 20 Thursday, August 5, 1999 10:52 AM REDUCING NOISE • If problems persist, check your alternator/generator and regula- tor gauges. You can reduce the Because your CB is exceptionally qui- noise from these sources by using et, any noise you hear is probably from bypass capacitors at the various an external source in your vehicle such output voltage points. -
Page 21: Care And Maintenance
21-1598.fm Page 21 Thursday, August 5, 1999 10:52 AM CARE AND MAINTENANCE Your RadioShack TRC-498 40-Channel CB Mobile Transceiver is an example of su- perior design and craftsmanship. The following suggestions will help you care for your CB so you can enjoy it for years. -
Page 22: Replacing The Fuse
21-1598.fm Page 22 Thursday, August 5, 1999 10:52 AM REPLACING THE FUSE The TRC-498’s 2-amp in-line fuse helps protect your CB from power surges and short circuits. When re- placement is required, use a 2-amp, slow-blow glass fuse, such as Cat. No. -
Page 23: Specifications
21-1598.fm Page 23 Thursday, August 5, 1999 10:52 AM SPECIFICATIONS RECEIVER Frequency Coverage ....All 40 CB Channels (Class D) 26.965–27.405 MHz Sensitivity for 10dB S/N ................0.5 mV Squelch Sensitivity at Tight ................1000 mV Overall Audio Fidelity for 450–2500 Hz ............–6 dB Maximum Audio Output Power .............. - Page 24 21-1598.fm Page 24 Thursday, August 5, 1999 10:52 AM RadioShack Limited Warranty This product is warranted against defects for 90 days from date of purchase from RadioShack company-owned stores and authorized RadioShack franchisees and deal- ers. Within this period, we will repair it without charge for parts and labor. Simply bring your RadioShack sales slip as proof of purchase date to any RadioShack store.
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