Need help...
Sorry, I'm new to digital scanning and P25 systems in general. Located in the Peterborough County area etc..
I have been trying to figure out which sites in Zone 1 & 2 to select in my favourites lists to speed up my talk group scanning times, eliminating areas/sites too far to get signals. I have two scanners which are able to decode P25. I used one scanner to isolate just the sites in Zone 2 that show their site signal would overlay my location (ex Peterborough, Pontypool etc) .
With the other scanner I included all sites in Zone 2 regardless of location. I then monitored both scanners simultaneously and took note which talk groups appeared on which Site IDs etc.. I realized that some of the traffic I was getting was being obtained from Sites well outside the expected area that I should be receiving a signal. Sites like Gatehouse, Prescott and Harcourt for instance were showing very clear understandable traffic.
Often the same or a different talk group id would also have the same communication traffic on the scanner that I'd isolated to just my local area sites. The same thing happened when I looked at just the Zone 1 sites. Traffic was heard on site locations well outside my expected coverage area, often appearing on the same or different talk group ids on the local area scanner.
I see that there is duplication of frequencies among sites, some of the control channels appear in more than a few site locations. Also note that both scanners were using the same external antenna using a multicoupler, so the signals should be similar in strength etc. So with all that said, hopefully clear enough that I make sense I have a few questions:
- some talk groups are showing as being Province wide, does that mean regardless of where the originating radio is located, that the traffic is broadcasted throughout the Province to all radios using that same talk group? Is it simulcast then?
- if two sites have overlapping frequencies either control or non control channels would comms via either site be replicated on the other site?
- why do comms on one talk group appear on a different talk group on another site?
- should I include all the sites that I have heard traffic on or eliminate those that show their signal is well outside my area? Because I would/should hear that traffic on the local site channels anyways on the same or at least a different talk group?
Thanks in advance of your help.. GB
Sorry, I'm new to digital scanning and P25 systems in general. Located in the Peterborough County area etc..
I have been trying to figure out which sites in Zone 1 & 2 to select in my favourites lists to speed up my talk group scanning times, eliminating areas/sites too far to get signals. I have two scanners which are able to decode P25. I used one scanner to isolate just the sites in Zone 2 that show their site signal would overlay my location (ex Peterborough, Pontypool etc) .
With the other scanner I included all sites in Zone 2 regardless of location. I then monitored both scanners simultaneously and took note which talk groups appeared on which Site IDs etc.. I realized that some of the traffic I was getting was being obtained from Sites well outside the expected area that I should be receiving a signal. Sites like Gatehouse, Prescott and Harcourt for instance were showing very clear understandable traffic.
Often the same or a different talk group id would also have the same communication traffic on the scanner that I'd isolated to just my local area sites. The same thing happened when I looked at just the Zone 1 sites. Traffic was heard on site locations well outside my expected coverage area, often appearing on the same or different talk group ids on the local area scanner.
I see that there is duplication of frequencies among sites, some of the control channels appear in more than a few site locations. Also note that both scanners were using the same external antenna using a multicoupler, so the signals should be similar in strength etc. So with all that said, hopefully clear enough that I make sense I have a few questions:
- some talk groups are showing as being Province wide, does that mean regardless of where the originating radio is located, that the traffic is broadcasted throughout the Province to all radios using that same talk group? Is it simulcast then?
- if two sites have overlapping frequencies either control or non control channels would comms via either site be replicated on the other site?
- why do comms on one talk group appear on a different talk group on another site?
- should I include all the sites that I have heard traffic on or eliminate those that show their signal is well outside my area? Because I would/should hear that traffic on the local site channels anyways on the same or at least a different talk group?
Thanks in advance of your help.. GB
