Vertex Standard VX-4000 Series Operating Manual page 11

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 PF Button Function
The PF (Programmable Function) button can be programmed by the dealer to provide
two of the other functions described below.
To activate the primary Accessory function, press the PF button momentarily. To access
the secondary Accessory function (which may include the Alarm), press and hold the PF
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 assigned PF button of the "Call/Reset" to reset the flashing indicator
and mute the receiver, otherwise press the assigned PF button of the "Call/Reset" to
sent your radio's identification code (ANI) to the dispatcher.
Talk-Around
The feature causes the assigned PF button of the "Talk-Around" to select simplex
operation on semi-duplex channels: 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.
Alpha Numeric
Press the assigned PF button of the "Alpha Numeric" to switch the display between
the Group/Channel number, and the Group/Channel name (alphanumeric). A tone
will sound each time you switch between numerical and alphanumerical display.
DIM
Press the assigned PF button of the "DIM" to adjust the brightness of the display and
key backright.
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VX-4000 Operating Manual