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Viking Portable 600 Radio Operating Manual
SmartNet / SmartZone / P25 Trunked Features
One talkgroup in the scan list can be designated a priority talkgroup by programming or it 
can be the selected talkgroup. When scanning, messages on a non-priority talkgroup are 
interrupted by messages on the priority talkgroup. Priority scanning must also be 
supported at the system level for it to occur as programmed in the radio. P25 trunking 
supports dual priority scan, therefore two priority talkgroups can be selected.
The Control Channel handles all traffic for the radios and communicates which talkgroups 
are using which channels. If the radio “receives” the ID for one of its talkgroups, it can go 
to that channel and hear the talkgroup. When the radio is on the voice channel, it cannot 
receive information about which talkgroups are on which channel. The radio will not know 
about any new talkgroup activity until it finishes the voice channel and returns to the 
Control Channel. 
If a talkgroup is set as a Priority Monitor talkgroup on the system, the system sends the 
talkgroup’s call information over a voice channel so it can be detected and move to this 
priority call. So even if the radio cannot hear the Control Channel, it will receive the call 
information and switch to the channel with the priority call.
Note
The Priority Monitor must not be confused with Transmit Priority, which is used when a 
call is placed in Queue when all the Voice Channels are busy.
6.11 Dynamic Regrouping
The dynamic regrouping feature allows a dispatcher to change the current talkgroup or 
button radios to a predefined regrouping channel to receive a new talkgroup. When the 
console issues a regroup order, the radio switches to the designated regroup talkgroup.
Note
For certain SmartNet/ SmartZone dynamic regrouping operations (such as pre-recorded 
messages) to function properly, the regroup talkgroup must be defined in the system 
talkgroup table. Otherwise the radio cannot determine whether the regroup talkgroup is 
analog or digital.
If the Cancel Dynamic Regrouping option button or menu parameter is programmed, it 
can be used to exit the dynamic regrouping mode if desired.
Otherwise, if the lock mode was not specified, the selected talkgroup can be manually 
changed and the previous talkgroup is reselected. If a locked regroup command is 
received, the displayed talkgroup cannot be changed manually or by cycling power. It can 
be changed only after a clear order is received from the console.
Dynamic regrouping operates as follows:
When this command is received, a 765 Hz tone sounds every 25 ms for 300 ms and the 
radio automatically changes to the regrouping channel. “Dyn Regrp” is displayed.
Preliminary Draft 3/9/12