Assessments - 4, GPA: 4.8
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Facilidade de uso
4 watts. AM (Amplitude Modulation) . 300 to 3000 Hz. 50 ohms, unbalanced. Less than 1 µ V for 10dB (S+N)/N. 6dB @ 7 KHz, 60 dB @ 10 KHz. 80 dB, typical. 60 dB, typical. Double Conversion: 1st: 10.695 MHz. 2nd: 455 KHz. Less than 10 dB change in audio output for inputs from 10 to 50,000 microvolts. Adjustable for optimum signal reception. RF type. Adjustable; threshold less than 1 µ V. 4 watts. 300 to 3000 Hz. Less than 7% @ 3 watts @ 1000 Hz. 16 ohms, round. 8 ohms; disables internal speaker when connected. 4 watts into external speaker. 8 ohms, when PA-CB switch is in PA, the PA speaker also monitors the receiver; separate jack provided. (SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE) 3 Installation Installation Location Plan the location of the bracket before starting the installation. Select a location with the driver or passengers is usually mounted to the underneath bracket beside it. Mounting and Connection The transceiver is held in the universal mounting permitting adjustment at the most convenient A universal mounting bracket is supplied along with 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 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. 3. Connect the antenna receptacle on the unit. CB antennas are terminated with a type receptacle marked "ANT." 4. Connect the red lead of DC power cord to +13.8 VDC. In automobile +13.8 VDC is usually obtained the accessory contact in the box. This prevents the set being left on accidentally the unit without the vehicle’s engine Before installing the CB radio, visually to determine which battery terminal, the larger of the two) is grounded to the engine 5. Connect the black lead to the negative side of the automobile. the chassis of the car. Any convenient location with good electrical contact (remove paint) may be used. Plug power cable into jack on In positive ground automobiles the red wire goes to the chassis black wire is connected to the ignition switch. 6. Mount 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. 4 5 Installation Installation CB Antenna Since the maximum allowable FCC, the antenna is one affecting transmission distance. properly matched antenna system the 50 ohm transmission line to the trucks, boats, etc.), an antenna system should be used. A vertically polarized, quarter-wavelength whip antenna provides the most reliable operation and greatest range. Shorter, loaded-type whip antennas are more attractive, compact and adequate for applications the maximum possible distance is not required. Also, the loaded whips do not present the problems of height imposed by a full quarter-wavelength whip. Mobile whip antennas utilize the metal body of the plane. When mounted at a corner of the vehicle they are slightly directional, in the direction of the body of the vehicle. For all practical purposes, the radiation pattern is nondirectional. The slight directional characteristic will be observed only at extreme distances. A standard antenna connector (type SO-239) is provided on the transceiver for easy connection to a standard PL 259 cable termination. Cobra loaded type antenna models are highly recommended for most installations. Consult your Cobra dealer for further details, or call 773-889-speak to a Cobra customer representative. When installed in a boat, the transceiver will not operate at maximum efficiency without a ground plate, unless the vessel has a steel hull. Before installing the transceiver in a boat, consult your dealer for information regarding an adequate grounding system and prevention of electrolysis between fittings in the hull and water. 3-Way Combination Antennas are available which allow operation of all three bands (AM-FM & CB), using a single antenna. However, use of this type of antenna usually results in less than normal transmit and receive range when compared to a standard-type "Single Band" antenna designed for CB only. The quality of reception of radio signals is highly dependent on the antenna system. Call 773-889-3087 for further information. 6 Ignition Noise Interference Use of a mobile receiver at low signal of electrical noise. The primary of noise in automobile the alternator and ignition when signal level is adequate, noise does not present a serious problem. Also, when extremely low level signals are being received, the transceiver may be operated with vehicle engine The unit requires very little current and therefore will not significantly discharg...