VXA-300 P
ILOT
III
O
PERATING
M
ANUAL
3
C
ONTROLS
& C
ONNECTORS
(
T
OP
P
ANEL
)
Antenna Jack
This SMA jack accepts the supplied flexible antenna,
or another antenna designed to provide 50
Ω
imped-
ance on the Aircraft Communication Band.
MIC/EAR
Jack
You may connect the supplied
CT-96
Headset Cable
or the (optional)
MH-44
B4B
Speaker/Microphone to
this jack. To use this jack, you must first remove the
plastic cap by rotating it counter-clockwise, then lift-
ing it away from the transceiver body.
Never connect any Speaker/Microphone that is not
recommended by the manufacturer. Because these jack
connections are unique, using a Speaker/Microphone
that is not specified by Vertex Standard may damage
the
VXA-300
.
Do not allow the
VXA-300
to become sub-
merged in water while the plastic cover over
the MIC/EAR jack is removed.
POWER/VOLUME
(Inner) Knob
Turn this (inner) control clockwise to turn the radio
on and to increase the volume. Counterclockwise ro-
tation into the click-stop will turn the radio off.
Pressing this knob downward momentarily selects the
tuning methods among the VFO (Variable Frequency
Oscillator), MR (Memory Recall), BOOK (Pre-Pro-
grammed Memories), and WX (Weather Channel
Memories) modes.
Note
: The WX mode is available in the USA version
only.
DIAL
Selector (Outer) Knob
This (outer) 20-position detented rotary switch tunes
the operating frequency or selects the memory chan-
nels.