23
Basic Operation
Monitor Switch
When listening to a very weak signal from an aircraft or
ground station, you may observe the signal disappearing
periodically as the incoming signal strength becomes too
weak to override the squelch threshold setting.
To disable the squelch temporarily, press and hold the
SQL
switch for 2 seconds. The squelch will remain
open and you should have a better chance of hearing
weak signals.
To return to normal operation, press the
SQL
momen-
tarily.
Accessing the 121.5 MHz Emergency Frequency
The
FTA-750L/FTA-550/FTA-450L
can quickly ac-
cess the 121.500 MHz emergency frequency. This func-
tion can be activated even when the keypad lock func-
tion (described on Page 48) is in use.
To access the emergency
frequency, press and
hold the [
121.5
] key.
After four beeps, the
transceiver enters the
emergency mode and
the frequency is au-
tomatically tuned to
121.500 MHz.
121.500
VOL
132.400
134.800
127.600
119.150
124.250
129.200
EMERGENCY
EMG
To exit the emergency mode, press the [
COMM
]
key. The message confirming the cancelation of the
emergency mode will appear. Press the [
◄
] or [
►
]
key to select “
YES
”, then press the [
ENT
] key.
