Service manual

2
Operating Manual Reprint (Partial)
CONTROLS & CONNECTORS
Antenna Jack
This SMA jack accepts the supplied flexible antenna,
or another antenna designed to provide 50 W imped-
ance on the Aircraft Communication Band.
POWER/VOLUME Knob
Turn this control clockwise to turn the radio on and to
increase the volume. Counterclockwise rotation into
the click-stop will turn the radio off.
CHANNEL Selector Knob
This 20-position detended rotary switch tunes the op-
erating frequency or selects the memory channels.
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) mode.
LCD (Liquid Crystal Display)
The display shows the selected operating conditions
as indicated on the next page.
The display may be changed to “inverted” viewing
via the Menu.
BUSY/TX Indicator Lamp
This lamp glows green when a signal is being received
and red when transmitting.
Loudspeaker
The internal speaker is located in this position.
Microphone
Speak across this opening in a normal voice level while
pressing the PTT switch.
Keypad
Several keys have dual functions.
The primary functions are labeled on the key top (ac-
tivated by simply pressing the key momentarily),
while secondary functions are labeled in yellow above
the top edge of the key (activated by pressing the
[
F
]
key first, then the indicated key).
TOP Panel
Front Panel