User manual COBRA 148GTL

[. . . ] OPERATING INSTRUCTIONS FOR YOUR How To Use Your 40 CHANNEL CITIZENS BAND SSB/AM 2-WAY MOBILE RADIO Model 148 GTL 40-CHANNEL, CITIZENS BAND SSB/AM 2-WAY MOBILE RADIO Model 148 GTL Contents Page The CB Story . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Section I: Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Section II: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3, 4 Section III: Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5, 6, 7, 8 Section IV: Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 17 Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 A. Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9, 10, 11 B. Indicator Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Operating Procedure to Receive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Operating Procedure to Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Receiving SSB Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13, 14 Alternate Microphones and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15, 16, 17 Section V: Maintenance and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 -21 FCC Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Section VI: Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19, 20, 21 Ten Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 A few Rules That Should Be Obeyed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 How Your CB Can Serve You . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Use Channel 9 for Emergency Messages Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Warranty Service Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Limited Two Year Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Cobra CB Radio Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside Back Cover The CB Story The Citizens Band lies between the shortwave broadcast and 10-meter Amateur radio bands, and was established by law in 1949. (CB also includes a Class A citizens band and Class C remote control frequencies. ) FCC regulations permit only "transmissions" (one party to another) rather than "broadcasts" (to a wide audience). Thus, advertising is not allowed on CB Channels because that is "broadcasting. " Section I Introduction FREQUENCY RANGE The COBRA 148GTL transceiver represents one of the most advanced SSB/AM twoway radios ever designed for use as a Class D station in the Citizens Radio Service. This unit features advanced Phase Lock Loop (PLL) circuitry, which is used in the AM mode and in the upper and lower single sideband modes, providing complete cover age of all 40 channels shown below. [. . . ] Some experimentation will determine the minimum amount of isolation required for a given sound level from the public address system. NOTE PA volume is controlled by adjusting the DYNAMIKE knob to the desired volume. When in the S-RF position, the meter swings proportionally to the strength of the received signal. When in the "CAL" position, the SWR meter can be calibrated by adjusting the "SWR" control to the "CAL" mark on the meter face. When in "SWR" position, the standing wave ratio is measured. Unless the station with which communication is desired is equipped with SSB, the AM mode is normally used. The mode selector switch changes the mode of operation of both transmitter and receiver simultaneously. Turn to "Receiving SSB signals" for a further explanation of single sideband. This switch is used to shape the audio response to the operator's preference. Bass is increased in the LOW position and treble is increased in the HI position. Swings proportionally to the ratio of standing wave voltage and RF output. Used to properly adjusts the length of the antenna, and to monitor the quality of the coaxial cable and all RF electrical connections. If there is any degradation whatsoever in any of the above, due to humidity, salt, spray, vibration or corrosion, the SWR meter reading will rise, thereby indicating that a problem exists. To calibrate, switch to the "CAL" position, transmit in AM Mode by pressing the (PTT) mic switch, and adjust the SWR control to the "CAL" mark on the meter then switch to "SWR" position for the SWR measurement (Note: CB must be in AM mode). The receiver/transmit LED indicator is located next to the channel indicator. The receiver and transmitter are controlled by the Press-To-Talk switch on the microphone. Press the switch and the transmitter is activated, release the switch to receive. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal "voice". The radio comes complete with low-impedance (500 ohm) dynamic microphone. For installation instructions on the other microphones see ALTERNATE MICROPHONES AND INSTALLATION section. Be sure that the power source, microphone and antenna are connected to the proper connectors before going to the next step. Set PA-CB Switch to the CB position and turn unit on by turning VOL control clockwise on COBRA 148GTL. [. . . ] Include a typed or clearly printed name and address of where the unit is to be returned. Ship prepaid and insured by way of a traceable carrier (to avoid loss in transit) such as United Parcel Service (UPS), Roadway Parcel Service (RPS) or First Class Insured Mail to Cobra Factory Service, Cobra Electronics Corporation, 6500 W. Cobra is not responsible for units not received if package has not been properly insured. If the unit is in warranty, upon receipt of your unit it will either be repaired or exchanged depending on the model. [. . . ]