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GENERAL OPERATION
20
time, the transmitter is disabled and an invalid condition tone sounds.
Five seconds before time-out occurs, an alert tone sounds to indicate that
time-out is approaching. The timer and tone are reset by releasing the
PTT switch.
One use of this feature is to prevent a channel from being kept busy
for an extended period by an accidentally keyed transmitter. It can also
prevent possible transmitter damage caused by transmitting for an exces-
sively long period. Conventional channels can also be programmed with
the Penalty and Conversation timers that are described starting on
page 28.
Tone Enable/Disable
The supervisory tones (see page 50) can be enabled and disabled by
the Tones On-Off option switch if it is programmed. When tones are
enabled by this switch, “TONE ON” is momentarily displayed and a tone
sounds. Conversely, when tones are disabled, “TONE OFF” is displayed
and no tone sounds. If the Tones On-Off option switch is not
programmed, tones are fixed in the on or off mode.
Scanning
Introduction
Scanning cycles through a list of channels, called a “scan list”,
checking each for messages. When a message is detected that your trans-
ceiver is programmed to receive, scanning stops and the message is
received. Shortly after the message is complete, scanning resumes (unless
it has been disabled).
There are two basic scan modes: Standard and Radio Wide. The
Standard mode is unique to the type of channel selected (conventional or
SMARTNET/SmartZone), and the Radio Wide mode is the same regard-
less of the channel type selected. Only one of these scan modes can be
enabled at a time. Therefore, if standard scanning is enabled while radio