User manual MIDLAND 77-120ESP

[. . . ] and foreign vehicles use a negative system, but some older models and some newer large trucks may have a positive ground. Check the requirements for your vehicle before you begin installation. Generally, you have a negative-ground system if the minus ( - ) battery terminal is connected to the motor block. Contact your dealer in the event you are unable to determine your vehicle's polarity system. Installation and operating accessories furnished with your Midland CB: 1. [. . . ] Essentially, you have five location choices: the roof, gutter, rear deck, front cowl or rear bumper. Where you decide to locate your antenna will determine the type of antenna you install. Again consult your Midland CB dealer for advice and guidance, and measure your needs against the attributes of the various Midland antenna models he carries. Weather radio performance may be degraded by use of a base loaded antenna. Antenna installation. Follow the manufacturer's installation instructions carefully. Warning: Never operate your CB radio without attaching an antenna or with a broken antenna cable. This can result in damage to transmitter circuitry. www. midlandradio. com Page 6 of 13 Owner's Manual 77-120 ESP Tuning your antenna. Some antennas are factory tuned. However, performance can usually be improved by slightly lengthening or shortening its length, using a Standing Wave Radio (SWR) meter. For the exact procedures to be used refer to the antenna manufacturer's installation manual. You can buy an SWR meter separately or have your antenna checked by your Midland CB Dealer's service department or a two-way comm shop. www. midlandradio. com Page 7 of 13 Owner's Manual 77-120 ESP FUNCTION AND LOCATION OF CONTROLS FRONT PANEL CONTROLS 1. MICROPHONE CONNECTOR: Plug in the supplied microphone to this connector. ON/OFF VOLUME: In the off position your transceiver's power is off. Turn this control clockwise to switch on the unit and adjust the volume. MIC GAIN: Rotating this control fully clockwise will result in the greatest microphone output. /rotating the control counter-clockwise reduces the microphone output, improving the sound in high noise environments. This control can also be used to control optional power microphone output. SQUELCH CONTROL: Adjust this control until background noise just disappears. If the control is adjusted too far clockwise it may cause muting of weaker signals. To reduce reception of unwanted distant stations, turn control counter-clockwise until only desired stations are heard. www. midlandradio. com Page 8 of 13 Owner's Manual 77-120 ESP 6. ROTARY CHANNEL SELECTOR: This easy to operate control allows changing of weather or CB channel, either up or down. This control will not operate when emergency channel 9 has been selected by using the "CH9" button or when the channel "LOCK" function has been activated. CHANNEL DISPLAY: LCD (liquid crystal display) read-out of selected CB or weather channel. Displays channel frequency in MHz and kHz when the "FRQ" switch is on. [. . . ] SERVICE If it ever becomes necessary to return your unit for service: Pack the unit in its original box and packing, Improper packing may result in damage during shipment. (Note: Some states do not require you to pay for postage and handling). You do not need to return accessory items (brackets, screws, power cord, antenna, etc. ) unless they may be directly related to the problem. Include a photocopy of the bill of sale or other proof of purchase showing the date of sale. [. . . ]