E.F. Johnson Company 5300 ES Series, Руководство по эксплуатации

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March 2008 5300 ES Series Mobile Radio Operating Manual 5-11
Conventional Features
Priority/Tx Priority (1) - Priority sampling occurs and the priority channel or channels
are those programmed in the selected scan list. The radio transmits on the priority (1)
channel.
Priority (1) on Selected - The priority (1) channel is always the selected channel. The
radio transmits on the selected channel.
Talkback - No priority sampling occurs. The radio transmits on the channel of a call
while scanning is halted or during scan hold time. Then once scanning resumes, it
transmits on the selected channel.
5.10.3 Priority Channel Sampling
The following describes priority sampling when scanning conventional channels.
Note Priority sampling when scanning SMARTNET/SmartZone/P25 Trunked channels is
described in Section 6.11.1.
The priority channel sampling feature ensures that when priority scanning, messages on
the priority channel are not missed while listening to a message on some other channel.
The radio can be programmed as just described so that the priority channel is a fixed
channel programmed in the current scan list, the currently selected channel, or not used.
Note Priority channel sampling is not available when receiving analog encrypted (DES) calls.
In addition, the priority channel is not scanned if the active channel is an analog channel
on the same frequency as the priority channel and is programmed with CTCSS/DCS
squelch control.
Either a single or dual priority channels can be programmed if desired. With dual priority,
a call on the second priority channel is interrupted by a call on the first priority channel but
not vice versa. When scanning and the selected channel is a single or first priority channel,
“P” is indicated in the left status display next to the zone number as follows:
This indication is displayed regardless of whether the priority channel is fixed or always
the selected channel. When the second priority channel is displayed, “2” is indicated
instead.
Priority Indicator