24
Adjusting the squelch
Press the
SQL
switch, then
rotate the DIAL knob to
set the squelch threshold
so that the receiver is just
silenced. The longer the
bar graph is displayed that
a higher signal level is re-
quired in order to open the
squelch.
Monitor Switch
When listening to a very weak signal from an aircraft
or ground station, you may observe the signal disap-
pearing 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 The squelch will remain open and you
should have a better chance of hearing weak signals.
To return to normal operation, press the
SQL
switch
momentarily.
Accessing the 121.5 MHz Emergency Frequency
The
FTA-850L
can quickly access the 121.500 MHz
emergency frequency. This function can be activated
even when the keypad lock function (described on
page 28) is in use.
To access the emergency
frequency, press and hold
the [
121.5
] key.
After four beeps, the trans-
ceiver enters the emergen-
cy mode and the frequency
is automatically tuned to
121.500 MHz.
To exit the emergency
mode, press the [
COMM
]
key. The message confirm
-
ing the cancelation of the
emergency mode will ap-
pear. Press the [
▲
] or [
▼
]
key to select “
YES
”, then
press the [
ENT
] key.
