24
Basic Operation
Transmission (COM Band)
To transmit, press and
hold the
PTT
switch.
Speak into the micro-
phone area of the front
panel grille in a normal
voice level.
The “
TX
” icon, which
indicates that the
FTA-
750L/FTA-550/FTA-
450L
are in the transmit
mode, appears on the
display.
PTT
SQL
127.300
VOL
TX
To return to the receive mode, release the
PTT
switch.
Operating Advice: Use of Internal Microphone
Your
FTA-750L/FTA-550/FTA-450L
are sealed against water ingress, which includes
waterproof seals around the microphone and speaker enclosure. This requires that you
focus your speech in the direction of the microphone’s location, so as to ensure suf-
ficient voice input to the radio. Refer to the illustration and observe the location of the
internal microphone.
If you find it difficult to utilize the
FTA-750L/FTA-550/FTA-450L
conveniently and
safely while speaking directly into the microphone, we recommend the use of the
SSM-
10A
Speaker/Microphone (option), or an aftermarket aviation headset with boom mi-
crophone.