Garmin GNS 430 - Manual (Page 29)

21
Section 1
Communicating with the GNS 430
The GNS 430 features a digitally-tuned VHF COM radio that provides a seamless
transition from communication to navigation, bringing the two most important functions
in fl ying together in one panel-mounted unit. The GNS 430’s COM radio operates in the
aviation voice band, from 118.000 to 136.975 MHz, in 25 kHz steps (default). For Euro-
pean operations, a COM radio confi guration to allow for 8.33 kHz steps is also provided
(see pages 160-161).
Volume
COM radio volume is adjusted using the k knob. Rotate the k knob clockwise to
increase volume, or counterclockwise to decrease volume.
Squelch
The COM radio features an automatic squelch, providing maximum sensitivity to
weaker signals while rejecting many localized noise sources. You may wish to override
this automatic squelch function when listening to a distant station or when setting the
desired volume level. The
k knob allows you to disable the automatic squelch and keep
the COM audio open continuously.
To override the automatic squelch, press the k knob momentarily. Press k again to
return to automatic squelch operation.
Press the
k
knob momentarily to override
the automatic squelch. Note the “RX” receive
indication when receiving a station.
“TX” appears at the upper right corner of the
screen while transmitting.
COM
Radio Volume
Auto Squelch
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