Monitor Switch; Anl (Automatic Noise Limiter) Feature - Yaesu FTA-310 Operating Manual

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
MONITOR switch for 2
seconds on the left side of
the radio, just below the
PTT switch. The squelch
will remain open and you
should have a better chance
of hearing weak signals.
To return to normal operation, press the MONITOR
switch momentarily.
FTA-310 O
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ANL (Automatic Noise Limiter) Feature

For reduction of impulse noise, such as that produced by
an engine's ignition system, the ANL feature may prove
helpful. The ANL feature is only activated in the AM
mode.
 To activate the ANL
f e a t u r e , p r e s s t h e
[ USER ] key momen-
tarily. The " " icon
will appear on the dis-
play, and you should
observe a reduction in the ig-
nition noise.
 To turn the ANL feature off,
repeat the above step; the
" " icon will disappear from the display.
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