User manual MIDLAND 77-250CXL

[. . . ] Connecting cables must be routed and secured in such a manner as not to interfere with the operation of the brake, accelerator or other controls. Interference from either the unit or connecting cables may contribute to the loss of control of the vehicle. Mechanical mounting Note: Extreme care should be exercised when drilling into dash to avoid damage to under-dash electronic ignition, cruise control, instrument and / or accessory wiring. Your unit must be mounted so as not to interfere with air bag (SRS) operation. Step 1: Heeding the caution, use the mounting bracket as a template for marking the location of screw holes under the dash. [. . . ] Keep antenna cables away from noise sources, such as the ignition system, gauges, electric fuel pumps, etc. Make sure you have a solid metal - to - metal ground. 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. Antenna installation. Follow the manufacturer's installation instructions carefully. 5 Warning: Never operate your CB radio without attaching an antenna or with a broken antenna cable. This can result in damage to transmitter circuitry. 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. 77-250CXLESP FUNCTION AND LOCATION OF CONTROLS 6 FRONT PANEL CONTROLS 1. 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 the channel "LOCK" function has been activated. Press and hold the memory button to be set for two seconds. Two beeps will sound when the channel is memorized. To recall a channel for use, press the desired memory button. The memorized channel will be selected and displayed. SCAN BUTTON: This button when pressed and when the squelch is closed causes the channels to be scanned until a signal opens the squelch. Pressing the button again cancels scanning. TALK BACK SWITCH: This switch allows the user to hear the transmitted audio as it is transmitted when it is set to "ON". This provides the operator with a means to monitor the effects of microphone gain adjustment and the sound of special audio effects units. ESP SWITCH: Pressing this button controls the ESP2TM audio system. Channel noises are reduced and voices enhanced when ESP2TM is active. BRIGHT/DIM SWITCH: Pressing this button causes the backlighting of the display to switch between dimmed and full brightness. BACK PANEL ANTENNA CONNECTOR: Connect a standard 50-ohm CB antenna to this connector. [. . . ] These results ESP2TM can accomplish without decreasing receiver range (it usually increases range). Most importantly, ESP2TM works by itself and does not need to be listening to other ESP2TM equipped CB's to be 100% effective. 9 TECHNICAL SPECIFICATIONS GENERAL Frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26. 965-27. 405 MHz Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Modulation type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AM Antenna impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Ohm Loudspeaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ohm Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electret Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13. 8 VDC negative ground RECEIVER ( CB, 26. 965-27. 405 MHz ) Sensitivity at 10db S/N. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 6 uV Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 db @ 5 Khz Squelch range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 5 uV-500 uV Audio output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. 0 W @ 8 Ohm ( 10% distortion) Distortion at 1000 mV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3% Audio frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400-2400 Hz Intermediate frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I ° 10. 695 MHz II ° 455 Khz Spurious response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Include $7. 50 for return postage and handling. (Note: Some states do not require you to pay for postage and handling). [. . . ]