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VX-4000 Operating Manual
ARTS (Auto Range Transpond System)
This system is designed to inform you when you and another ARTS-equipped station are
within communication range.
During ARTS operation, your radio automatically transmits for about 1 second every 25
(or 55) seconds (the interval is programmed by Dealer) in an attempt to "Shake hands"
with the other station.
If you move out of range for more than one minutes, your radio senses that no signal has
been received, a ringing beeper will sound. If you subsequently move back into range, as
soon as the other station transmits, your beeper will sound.
The A Button Function
The A (Accessory) button can be programmed by the dealer to provide two of the other
functions described below.
To activate the primary Accessory function, press the A button momentarily. To access
the secondary Accessory function (which may include the Alarm), press and hold the A
button for 1.5 seconds or longer.
Call/Reset
When this feature is programmed and a selective call has been received ,momen-
tarily press the A button to reset the flashing indicator and mute the receiver, other-
wise press the A button to sent your radio's identification code (ANI) to the dis-
patcher.
Talk-Around
The feature causes the A button to select simplex operation on semi-duplex chan-
nels: the transmit frequency becomes the same as the receive frequency (regardless
of any programmed offset for the channel).
Note: This feature has no effect on simplex channels. After pressing the button,
"TA" is displayed on the LCD.
Noise Blanker
Because local noise can be particularly troublesome in the VHF Low-Band frequency
spectrum, the Low-Band version of the VX-4000 includes a Noise Blanker feature,
which may be toggled on and off by pressing the A button for the appropriate length
of time.
Alpha Numeric
Press this key to switch the display between the Group/Channel number, and the
Group/Channel name (alphanumeric). A tone will sound each time you switch be-
tween numerical and alphanumerical display.
DIM
Press this key to adjust the brightness of the display and key backright.
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