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21-1585.fm Page 1 Thursday, August 5, 1999 9:39 AM
Cat. No. 21-1585A
OWNER’S MANUAL
Please read before using this equipment.
TRC-488
40-CHANNEL 2-WAY CB RADIO
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21-1585.fm Page 2 Thursday, August 5, 1999 9:39 AM FEATURES Your Radio Shack TRC-488 40-Chan- Two Ceramic Filters — provide supe- nel 2-Way CB Radio is a high perfor- rior channel selectivity and eliminate mance citizen’s band radio that also adjacent-channel interference. lets you tune to national weather ser- vice broadcasts. This CB is perfect for Automatic Noise Limiting (ANL) — recreational, business, or emergency reduces noise caused by nearby elec- use. It lets you talk to other people
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21-1585.fm Page 3 Thursday, August 5, 1999 9:39 AM CONTENTS Installation ............................................................................................................ 4 Mounting the TRC-488 .................................................................................... 4 Mounting the Microphone Holder .................................................................... 5 Connections ...........................................................................................
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21-1585.fm Page 4 Thursday, August 5, 1999 9:39 AM INSTALLATION Follow these steps to mount the CB MOUNTING THE TRC-488 using the supplied bracket, screws, washers, and knobs. If you use the TRC-488 as a base sta- tion, you can mount it on a desk, shelf, 1. Using the mounting bracket as a or table. template, mark the positions for the screw holes. The most common mounting location for the CB is under a vehicle’s dash- board. If you use the TRC-488 in a ve- hicle, mount it securely to avoid da
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21-1585.fm Page 5 Thursday, August 5, 1999 9:39 AM 4. Attach the CB to the mounting bracket using the supplied rubber washers and mounting knobs. (illus) MOUNTING THE MICROPHONE HOLDER With a Phillips screwdriver and the supplied screws and washers, attach the supplied microphone holder to the CB’s right side. (illus) 5
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21-1585.fm Page 6 Thursday, August 5, 1999 9:39 AM CONNECTIONS Caution: Never pull on the micro- CONNECTING THE phone cable. MICROPHONE 1. Make sure the pins on the micro- CONNECTING AN phone cable’s plug are aligned with the holes in the CB’s MICRO- OPTIONAL EXTERNAL PHONE jack on the CB’s left side SPEAKER and insert the plug into the jack. You can connect an external speaker to the CB. Notes: (illus) • You must use an 8-ohm speaker capable of handling up to 5 watts of power (such as Rad
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21-1585.fm Page 7 Thursday, August 5, 1999 9:39 AM 5. Connect the orange BATT + wire, CONNECTING POWER with in-line fuse, to your vehicle battery’s positive (+) terminal or to Using Vehicle Battery Power a point in the vehicle’s fuse box fuse that provides a continuous Follow these steps to power the CB source of 12 volts even when the from your vehicle’s battery. ignition is turned off. 1. Make sure the CB is turned off. 2. Disconnect the cable from your – vehicle battery’s negative ( ) ter-
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21-1585.fm Page 8 Thursday, August 5, 1999 9:39 AM 3. Connect the black GROUND wire INSTALLING AN to the DC power supply’s negative ANTENNA (–) terminal. Caution: To prevent damage to your CB, you must connect an antenna to the CB before you operate it. (illus) Note: Your local Radio Shack store sells a variety of CB antennas for both mobile and base-station use, and co- axial antenna cable and connectors. For the best performance, consider the 4.Connect both the red TO following when decidi
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21-1585.fm Page 9 Thursday, August 5, 1999 9:39 AM 2. Route the cable between the ADJUSTING THE antenna and the CB. ANTENNA’S SWR 3.Connect the cable to the ANTENNA jack on the back of the To achieve your CB’s maximum range, CB. the antenna’s Standing Wave Ratio (SWR) should be adjusted using an SWR meter (not supplied). Follow the instructions supplied with (illus) the SWR meter and antenna to adjust your antenna’s SWR to the lowest pos- sible value. SWR values of 2.0:1 are generally accept
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21-1585.fm Page 10 Thursday, August 5, 1999 9:39 AM OPERATION SETTING SQUELCH USING AUTOMATIC NOISE LIMITING Caution: Do not attempt to use your CB without first connecting it to an an- If you hear low-level popping noises tenna. while receiving transmissions, slide ANL/OFF to ANL to turn on the auto- 1. Turn VOLUME clockwise until it matic noise limiting circuit. Otherwise, clicks to turn on the CB, then set it leave ANL/OFF set to OFF (see “Re- to about halfway between the min- ducing Nois
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21-1585.fm Page 11 Thursday, August 5, 1999 9:39 AM Your TRC-488 receives the following 2. To select the emergency channel frequencies available to NOAA: (9), slide CH9/OUT to CH9. CH9 flashes on the display. 162.400 MHz 162.500 MHz 162.425 MHz 162.525 MHz 162.450 MHz 162.550 MHz (illus) 162.475 MHz To select one of the seven available weather channels, set the mode selec- tor to W1-W7. The yellow WX LED Important: The emergency chan- lights. nel is used for reporting and moni- toring emergen
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21-1585.fm Page 12 Thursday, August 5, 1999 9:39 AM 4. If necessary, turn RF.GAIN clock- 4. Hold the microphone 2 or 3 inches wise to increase the signal sensi- from your mouth, then press and tivity. hold down the microphone talk button and speak into the micro- phone in a normal voice. The red TX indicator lights. (illus) (illus) To turn off the TRC-488, turn VOLUME counterclockwise until you hear it click. Note: Do not speak too loudly when transmitting. It does not (illus) make your signa
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21-1585.fm Page 13 Thursday, August 5, 1999 9:39 AM CB TIPS Like any other activity, CB radio has its plan a get-together. You can even rules and courtesies. The following tips meet new friends this way. will help you get the most enjoyment • Ever have car trouble or run out of out of your CB. gas on the highway? It’s a relief to be able to use the CB to call for assistance. COMMON USES FOR A • Camping, fishing, or other sports CB RADIO are more fun with a CB. Locate a buddy or find out “wha
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21-1585.fm Page 14 Thursday, August 5, 1999 9:39 AM USING COMMON 10-CODES Citizen’s band operators have largely adopted the 10-codes for standard questions and answers. These codes permit faster communication and better intelligibility in noisy areas. The following table lists some of the more common codes and their meanings. Code Meaning Code Meaning 10-1 Receiving poorly/Cannot 10-18 Urgent understand your message 10-19 Contact ______________ 10-2 Receiving well/Your signal is 10-20 What i
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21-1585.fm Page 15 Thursday, August 5, 1999 9:39 AM TROUBLESHOOTING If your CB is not working as it should, follow the suggestions below to try to eliminate the problem. If the CB is still not working properly, take the CB to your local Radio Shack store for assistance. Problem Solution Trouble with reception. • Be sure the CB is turned on. •Be sure VOLUME is turned up. •Be sure SQUELCH is adjusted properly. • Be sure the microphone is securely con- nected to the CB. • Be sure the antenna cab
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21-1585.fm Page 16 Thursday, August 5, 1999 9:39 AM If you operate the TRC-488 with the MAXIMUM RANGE vehicle’s engine off, you should not have any problems with noise. If you The maximum range and quality of CB use the CB with the engine on, you can transmissions vary depending on: determine the source of the noise by • The type and quality of antenna turning off the engine and operating used. the CB with the ignition set to ACC. If most or all of the noise goes away, the • The height of the
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21-1585.fm Page 17 Thursday, August 5, 1999 9:39 AM MAINTENANCE Your TRC-488 40-Channel 2-Way CB Radio is an example of superior design and craftsmanship. The following suggestions will help you care for your CB so you can enjoy it for years. Keep the CB dry. If it gets wet, wipe it dry immediately. Liquids might contain minerals that can corrode the electronic circuits. Handle the CB gently and carefully. Dropping it can damage circuit boards and cases and can cause the CB to work improperl
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21-1585.fm Page 18 Thursday, August 5, 1999 9:39 AM REPLACING THE FUSES FCC INFORMATION The TRC-488’s red wire 2-amp in-line The Federal Communications Com- fuse helps protect your CB from power mission (FCC) does not require you to surges and short-circuits. If the fuse have a license to operate this CB. has blown, replace it with a 2-amp, However, the FCC does require you to fast-acting glass fuse (such as Cat. read and know Part 95 of FCC Rules. No. 270-1007). These rules apply to the oper
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21-1585.fm Page 19 Thursday, August 5, 1999 9:39 AM SPECIFICATIONS RECEIVER Weather Frequency Coverage .............................................................162.400 MHz 162.425 MHz 162.450 MHz 162.475 MHz 162.500 MHz 162.525 MHz 162.550 MHz Frequency Coverage ..................................................All 40 CB Channels (Class D) 26.965 to 27.405 MHz Sensitivity ............................................................0.7 μV or better for 10 dB (S+N)/N Adjacent Channel Reject
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21-1585.fm Page 20 Thursday, August 5, 1999 9:39 AM GENERAL Power Requirements ........................................... 12-16 Volts DC, Negative Ground 13 13 1 Dimensions .......................................................... 1 /16 ¥ 5 /16 ¥ 7 /2 Inches (HWD) (46 ¥ 147 ¥ 190 mm) Weight............................................................................................... 2 lb 2 oz (1 Kg) Specifications are typical; individual units might vary. Specifications are subject to chan
