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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
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.
VXA-300 P
III O
ILOT
C
& C
ONTROLS
ONNECTORS
Speaker/Microphone to
B4B
M
PERATING
ANUAL
( T
)
P
OP
ANEL
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.
3
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