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ANTENNA ATEENUATOR (ANT. ATT.) BUTTON
The ANT.ATT. button, located on the upper right front of the radio, is used to attenuate a signal.
Tune into a station, then press the ANT.ATT. button and notice that the signal strength indicator,
located on the left side of the display, changes at three levels. The maximum level is the highest
gain and the lowest level is minimum gain. Use the lowest level (-20dB) if the signal is extremely
strong and local. Use the intermediate level (-10dB) for average signals and use the highest level
(0dB) for weak signals.
A message alert tone helps you to know which level you select.
Sequentially short press the ANT.ATT. button, a "B" sound
signifies it is lowest level; a "BB" sound signifies it is interm
ediate level; a long "B--" sound signifies it is the maximum level.
Antenna Attenuation Indication
RF GAIN CONTROL
On the right front of the radio is the RF Gain control knob. You can leave it fully counterclockwise
in the AUTO position, where it will function automatically, or you can turn it clockwise and use it
manually to control the RF (radio frequency) gain. Using it manually may improve the radio's
rejection of interference from adjacent frequencies that may interfere, especially on Shortwave.
This function does not work in FM.
SQUELCH CONTROL
Using the Squelch control eliminates background noise. This control is used mainly in the FM
and the aircraft band. This control is on the lower right front of the radio. To engage it, turn it on
by turning the knob clockwise. Turn it off by clicking the knob fully counterclockwise.
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