User manual MIDLAND 77-255 INSTALL GUIDE

[. . . ] 1 Your 40 channel CB represents the state of the art in high tech engineering. This unit is not only a full feature CB transceiver but incorporates a high performance 10 channel NOAA weather bureau VHF receiver. The full 10channel weather receiver allows use on all current and future NOAA weather bureau channels plus Canadian and international channels. The unit incorporates microprocessor controlled PLL circuitry for precise tuning and increased function. [. . . ] MICROPHONE CONNECTOR: Plug in the supplied microphone to this connector. The collar ring has a screw on locking ring. Push the ring onto the units collar and screw on until it is tight. 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. 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. RF GAIN CONTROL: This control adjusts the receiver sensitivity. Adjust the control for best reception of distant or local stations. To reduce reception of unwanted distant stations, turn control counter-clockwise until only desired stations are heard. MIC GAIN CONTROL: 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. CHANNEL DISPLAY: LCD (liquid crystal display) read-out of selected CB or weather channel. M1, M2, M3 INDICATOR: These LCD boxes are illuminated when a memory button has been used to select the CB channel. TX INDICATOR: LCD indicator for showing the unit is transmitting. SCAN INDICATOR: This indicates channel scanning is operating. 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. Select the desired channel using the rotary channel selector knob. [. . . ] The ESP2TM noise reduction system constantly monitors the signal strength and the type of noise present. 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. Skip interference can cause whistles and howling sounds. [. . . ]