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19

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 

µ

V or better for 10 dB (S+N)/N

Adjacent Channel Rejection .......................................................... 50 dB (at 10 kHz)

Audio Output.............................................................................. 4.5 Watts (Nominal)

Frequency Response ............................................................................450-2500 Hz

Intermediate Frequency...............................................................1st IF: 10.695 MHz

2nd IF: 455.00 kHz

Cross Modulation..............................................................................................50 dB

Squelch.................................................................... Adjustable from 0.6 

µ

V to 1 mV

TRANSMITTER

Frequency Coverage .................................................. All 40 CB Channels (Class D)

26.965 to 27.405 MHz

Output Power......................................................................4 Watts (FCC Maximum)

Type of Modulation ............................AM Double-Sideband, Full Carrier Modulation

Modulation Capability .......................................................................................+90%

Spurious Emission ......................................................................... Less than –65 dB

Frequency Tolerance ..................................................................................... 0.002%

Antenna Impedance ..................................................................................... 50 Ohm

Current Drain (13.8 volt supply)....................................... 1 Amp with No Modulation

1.5 Amps with Full Modulation

21-1585.fm  Page 19  Thursday, August 5, 1999  9:39 AM

Summary of Contents for TRC-488

Page 1: ...Cat No 21 1585A OWNER S MANUAL 40 CHANNEL 2 WAY CB RADIO Please read before using this equipment TRC 488 21 1585 fm Page 1 Thursday August 5 1999 9 39 AM...

Page 2: ...and exact tuning Hysteresis Squelch automatically adjusts receiver sensitivity to compen sate for fading signals and to eliminate signal chopping during reception Two Ceramic Filters provide supe rior...

Page 3: ...the Antenna s SWR 9 Operation 10 Setting Squelch 10 Using Automatic Noise Limiting 10 Listening to Weather Broadcasts 10 Receiving Transmissions on the Channels 11 Transmitting 12 CB Tips 13 Common U...

Page 4: ...fere with any of the vehicle s mov ing parts The CB is not directly in front of heating vents All wires and cables reach their connection points Follow these steps to mount the CB using the supplied b...

Page 5: ...lied rubber washers and mounting knobs 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...

Page 6: ...n pull out the plug Caution Never pull on the micro phone cable CONNECTING AN OPTIONAL EXTERNAL SPEAKER You can connect an external speaker to the CB Notes You must use an 8 ohm speaker capable of han...

Page 7: ...T wire with in line fuse to your vehicle battery s positive terminal or to a point in the vehicle s fuse box fuse that provides a continuous source of 12 volts even when the ignition is turned off Thi...

Page 8: ...nd connectors For the best performance consider the following when deciding on an antenna and its location The antenna and cable should be as far as possible away from sources of electrical noise The...

Page 9: ...rtment or other areas that produce extreme heat ADJUSTING THE ANTENNA S SWR To achieve your CB s maximum range the antenna s Standing Wave Ratio SWR should be adjusted using an SWR meter not supplied...

Page 10: ...e stops Note To receive weaker transmis sions turn SQUELCH counter clockwise USING AUTOMATIC NOISE LIMITING If you hear low level popping noises while receiving transmissions slide ANL OFF to ANL to t...

Page 11: ...the emergency channel 9 slide CH9 OUT to CH9 CH9 flashes on the display Important The emergency chan nel is used for reporting and moni toring emergency information about accidents hazardous road cond...

Page 12: ...e desired channel 4 Hold the microphone 2 or 3 inches from your mouth then press and hold down the microphone talk button and speak into the micro phone in a normal voice The red TX indicator lights N...

Page 13: ...ome CBs are great on trips to commu nicate with family members while they are in separate cars Contact friends or neighbors find out what s happening or plan a get together You can even meet new frien...

Page 14: ...last message 10 10 Negative No or standing by 10 11 __________ in service 10 12 Stand by 10 13 Request report road weather conditions 10 14 Information 10 15 Message delivered 10 16 Reply to message...

Page 15: ...enna cable is securely con nected to both the antenna and the CB Trouble with transmission Be sure the microphone is securely con nected to the CB Extend the antenna to its full length Clean and tight...

Page 16: ...te for If you operate the TRC 488 with the vehicle s engine off you should not have any problems with noise If you use the CB with the engine on you can determine the source of the noise by turning of...

Page 17: ...store the CB only in normal temperature environments Temperature extremes can shorten the life of electronic devices and distort or melt plastic parts Keep the CB away from dust and dirt which can cau...

Page 18: ...munications Com mission FCC does not require you to have a license to operate this CB However the FCC does require you to read and know Part 95 of FCC Rules These rules apply to the operation of a cla...

Page 19: ...500 Hz Intermediate Frequency 1st IF 10 695 MHz 2nd IF 455 00 kHz Cross Modulation 50 dB Squelch Adjustable from 0 6 V to 1 mV TRANSMITTER Frequency Coverage All 40 CB Channels Class D 26 965 to 27 40...

Page 20: ...it with out charge for parts and labor Simply bring your Radio Shack sales slip as proof of purchase date to any Radio Shack store Warranty does not cover transportation costs Nor does it cover a pro...

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