E F Johnson Company 2425720 Manuale Utente

6-20 

Viking™ VP600 Portable Radio Operating Manual

With this option enabled on a talkgroup, as the talkgroup affiliates with a site that site is 
saved if the radio is changed to a new talkgroup. When the radio moves back to the Wide 
Area Scan talkgroup, it will attempt to affiliate on the saved site before looking for a new 
site.

The following control channel search methods are normally used to find a control channel:

Short Hunt - The dynamic array of 7 (or 15) adjacent sites is searched. This list is 
saved on power down and loaded again at power up. It is erased whenever parameters 
are downloaded to the radio.

Long Hunt - If no valid control channel is located by the preceding short hunt method, 
the radio searches the list of control channels programmed into the radio.

Full Spectrum CC Scan - If the two preceding methods do not locate a control 
channel, every channel available to the radio is searched.

To use system channel resources more efficiently, some system operators are using system 
access permissions to steer certain talkgroups to particular sites. For example, a police 
department may be allowed to use only Site 1, and a public works department may be 
allowed to use only Site 2.

The problem with this operation is that every time a different talkgroup is selected, the 
access permission may be different and a different site may need to be accessed. This 
could result, in a worst case, in a delay of up to 30 seconds in finding a new site. This 
could occur if there are no valid sites for the new talkgroup in the dynamic site list.

A zone password can be programmed with the Viking VP600 portable radio. It prevents 
unauthorized reprogramming of zones by keypad programming. When this password is 
used, it must be entered before system or channel parameters in that zone can be changed.