Vertex Standard VXA-220, Operating Manual

Page: 19 / 56

VXA-220 P
RO
VI O
PERATING
M
ANUAL
17
A
DVANCED
O
PERATION
for details.
Note 2 : The Weather Channel mode memorizes the last
Weather Channel you have used, and will retain this in-
formation until the radio is turned off.
Monitor Key
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
] key for 2 sec-
onds on the left side of the
radio, just below the
PTT
button. The squelch will re-
main open and you should
have a better chance of hear-
ing weak signals.
To return to normal operation, press the [ MONITOR
] key
momentarily.
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.
To activate the ANL fea-
ture, press the [
F
] key
f o l l o w e d b y t h e
[
0
(
A N L
)] key. The
“
ANL
” icon will appear
on the display, and you
should observe a reduc-
tion in the ignition noise.
To turn the ANL feature
off, repeat the above step
(press the [
F
] key followed
by the [ 0
(
ANL
)] key); the “
ANL ” icon will disap-
pear from the display.
F