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4.SQUELCH: The squelch control is normally set to a position which just eliminates undesired background noise with no signal present. With the audio volume adjusted to a satisfactory level, rotate the Squelch control clockwise to the point where the sound from the speaker is cut off. In this position, there will be no sound from the speaker until a signal is received. In order to hear weak signals, it may be necessary to rotate the Squelch control counterclockwise, allowing some background noise to be heard.
5.CLARI FI ER: The clarifier is normally set to the center position. This feature has several uses and can greatly enhance receiver operation. If a receive signal is slightly off frequency, this control can be operated to optimize the receive signal. This control is primarily intended to tune in SSB signals, but, it may be also used to optimize the AM signal.
6. MIKE GAIN: This control is used to adjust, as required, microphone input sensitivity for optimum amount of modulation in transmit UN IDEN's citizen's band transceivers have been designed to permit the user to attain levels of modulation up to 100% depending on the setting of the microphone gain control, using the microphone provided with the unit. UNIDEN's automatic compression and peak limiting circuits assure maximum modualtion with mini- mum distortion.
7.DIMMER SWITCH: This switch is used to adjust the brightness of the LED channel display and the meter. 0 IM position reduces brightness.
8.CH9 SWITCH: This switch is for use when emergency communication is needed on the emergency channel CH9. Pressing the CH9 switch activates CH9 regardless of the position of the channel selector switch. When CH9 switch is pressed, the channel display is blanked and the CH9 indicator is activated.
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10.NB/ANL SWITCH: When the switch is placed in the NB/ANL position, both of RF Noise Blanker and Automatic Noise Limiter circuits are activated. The NB is very effective for repetitive impulse noise such as ignition noise. The ANL reduces annoying
11.RF GAIN: This control is used primarily to optimize reception in strong signal areas. Gain is reduced by counterclockwise rotation of the control.
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