VXA-300 PILOT III OPERATING MANUAL
14
Accessing the 121.5 MHz Emergency Frequency
The VXA-300 can quickly access the 121.500 MHz Emer-
gency Frequency. This function can be activated even when
the keypad lock function (described on page 14) is in use.
To access the Emer-
gency Frequency, press
the
[
121.5
]
key momen-
tarily.
To exit the Emergency
Frequency, press down-
ward on the VOLUME
knob.
Transmission
To transmit, press and hold the PTT switch. Speak
into the microphone area
of the front panel grille
in a normal voice level.
To return to the receive
mode, release the PTT
switch.
BASIC OPERATION
Operating Advice: Use of Internal Microphone
Your VXA-300 is extensively sealed against water ingress, so as to ensure reliable opera-
tion even if it has become submerged. This unique construction includes waterproofing
seals around the microphone and speaker enclosure, requiring that care be exercised when
speaking into the internal microphone.
Please refer to the illustration, and observe the location of the internal microphone. It is
important that you focus your speech in the direction of the microphone's location, so as to
ensure sufficient voice input to the radio.
If you find it difficult to utilize the VXA-300 conveniently and safe while speaking directly
into the microphone, we recommend the use of the MH-44B4B Speaker/Microphone (op-
tion), or an after-market aviation headset/boom microphone.
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