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. [. . . ] For the memory retention circuit to operate the orange wire must be connected to power that is not switched off by the ignition switch. The connection point can be directly to the battery or an unswitched fuse on the fuse block. It is also possible to connect the red wire to the Accessory terminal on the fuse block or ignition switch wo that your CB automatically goes off when the ignition goes off, preventing a battery drain. ) Note: In many new vehicles the only circuit that has noise filtering is the radio circuit. Then tightly connect the black wire directly to the vehicle's metal frame. A good direct metal - to - metal ground is essential for optimum performance. Installations using the cigarette lighter socket for power require an extra ground wire from the radio chassis to the vehicle if the radio is not fastened to a grounded part of the vehicle. Step 3: Plug - in the power cord to the receptacle provided on the back of the transceiver. Mounting the main unit. Step 1: Position the main unit between the bracket arms in line with the retention knobs. Step 2: Tighten the retention knobs. Installation of microphone hanger. Mounting holes are provided on the microphone hanger bracket. The bracket can be attached to the vehicle dash, or other convenient location. Antenna: How to select, position install 4 and tune the right one for you. Basically, you have two types of mobile CB antennas - full-length whip and loaded whip - and a variety of types of mounts (depending on where you locate your antenna) to choose from. The dealer who sold you your Midland CB can advise which type is best for you. Where you locate your antenna does make a difference. Some general rules for antenna location that can aid CB performance: 1. The higher the proportion of antenna length that is above the roof, the better. WX INDICATOR: When this indicator is illuminated it indicates your unit is in the weather receive mode. S/RF DISPLAY: LCD read-out of received signal strength and relative transmitter power output. CB/WX: This button causes your unit to change modes between NOAA weather bureau receiver and CB operation. M1, M2, M3 BUTTONS: These buttons select CB channels previously set by the operator for quick recall. SCAN BUTTON: This button when pressed and when the squelch is closed causes the channels to be scanned until a signal opens the squelch. 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. 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. S-METER JACK: A DC voltmeter may be connected to this jack for precision monitoring of received signal strength. EXT SPEAKER JACK: When a speaker is connected to this jack the internal speaker is by-passed. All received signals will be heard through the external speaker when it is connected. [. . . ] When the signal strength is too low for good reception, the receiver sound is automatically adjusted to dramatically reduce the noise that comes through the speaker. While the noise is decreased the actual sounds you need to hear are increased. Electrical interference from power lines, ignition systems or other sources can produce low humming and buzzing noise. ESP2TM can determine the difference between undesired noises and sounds you want to hear and filter the noises out. [. . . ]