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Accessing the 121.5 MHz Emergency Frequency
The FTA-310 can quickly access the 121.500 MHz
Emergency Frequency. This function can be activated
even when the keypad lock function (described on page
21) is in use.
To access the Emer-
gency Frequency, press
the [ 121.5 ] key mo-
mentarily.
To exit the Emergency Fre-
quency, press downward
on the VOLUME knob.
Your FTA-310 is extensively sealed against water ingress, so as to ensure reliable op-
eration even if it has become submerged. This unique construction includes waterproof-
ing 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 FTA-310 conveniently and safe while speaking
directly into the microphone, we recommend the use of the MH-44
phone (option), or an after-market aviation headset/boom microphone.
16
B
o
asIc
peratIon
Operating Advice: Use of Internal Microphone
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.
Speaker/Micro-
B4B
FTA-310 O
M
perATing
AnuAl
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