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Фрагмент инструкции
Although this CB is simple to operate, we want you to be aware of all the unique features your new CB Radio offers. THE CB STORY The Citizens Band lies between the shortwave broadcast and 10-meter Amateur radio bands, and was established by law in 1949. The Class D two-way communications service was opened in 1959. (CB also includes a Class A citizens band and Class A remote control frequencies.) FCC regulations permit only "transmissions" (one-party to another) rather than" broadcast" (to a wide audience). Thus, advertising is not allowed on CB channels because that is "broadcasting". “Cuts Static coming in, adds Punch going out!” Cobra proudly introduces the first Patent Pending technology that dramatically improves the transmission and reception of CB radio signals. This revolutionary system reconfigures the transmission signal which allows it to be transferred more effectively through cluttered airwaves. It literally OpunchesO your message through the hundreds of thousands of signals that are in the air. At the same time, SoundTracker system dynamically adjusts the relationship between the signal and static commonly referred to as noise. This allows CobraOs SoundTracker system to significantly reduce the amount of static on all incoming CB signals. The system can be further optimized when two SoundTracker CBOs are used to talk to each other. The end result is a clearer, cleaner sounding reception of signals and more powerful transmission which dramatically improve CB Communications WARNING Replacement or substitution other parts of a unique recommended by Cobra, regulations of Part 95 of Type Acceptance requirements LICENSING Citizens Band (CB) Radio operators to obtain an FCC license to operate equipment or provide station identification. Nevertheless, an operator of a CB radio station to comply with the communications act the rules of CB Radio Operation. Installation Location Plan the location of the transceiver and microphone bracket before starting the installation. Select a location that is convenient for operation and does not interfere with the driver or passengers in the vehicle. In automobiles, the transceiver is usually mounted to the underneath of the dash panel, with the microphone bracket beside it. Mounting and Connections The transceiver is held in the universal mounting bracket by two thumb screws, permitting adjustment at the most convenient angle. A universal mounting bracket is supplied along with self tapping screws and star washers. The mounting must be mechanically strong and also provide a good electrical connection to the chassis of the vehicle. To mount the transceiver: 1. Determine the most convenient location in your vehicle. Hold the COBRA radio with mounting bracket in the exact location desired. If nothing will interfere with mounting it in the desired position, remove the mounting bracket and use it as a template to mark the location for the mounting screws. 2. Drill necessary holes and secure mounting bracket in location. 1 18.WX.9/19/Page 2 3. Connect the antenna receptacle on the unit. Most terminated with a type PL-259 plug marked "ANT." 4. Connect the red lead of DC power cord to +13.8 VDC. In automobile installations, +13.8VDC from the accessory contact in the fuse prevents the set being left on accidentally operating the unit without the vehicle’s running. Before installing the CB radio, visually check battery connections to determine which battery terminal, positive or negative (positive is the larger the two) is grounded to the engine block (or chassis). 5. Connect the black lead to the negative side of the automobile. This is usually the chassis of the car. Any convenient location with good electrical contact (remove paint) may be used. 6. Mount the microphone bracket on right side of the transceiver or near it using two screws supplied. When mounting in an automobile, place the bracket under the dash so the microphone is readily accessible. CB Antenna Since the maximum allowable power output to the transmitter is limited by the FCC, the antenna is one important factor affecting transmission distance. Only a properly matched antenna system will allow maximum power transfer from a 50-ohm transmission line to the radiating element. In mobile installations (cars, trucks, boats, etc.), an antenna system that is non-directional should be used. A vertically polarized quarter-length whip antenna provides the most reliable operation and the greatest range. The shorter loaded-type whip antennas are more attractive, compact and adequate for applications where the maximum possible range is not required. Also the loaded whips do not present the problems of height imposed by the full quarter-wavelength whip. Mobile whip antennas a ground plane. When mounted are slightly directional, in the direction of the body of the For all practical purposes, the radiation pattern is non-directional. The slight directional characteristic will be observed only at extreme distances. A standa...