How does one PROPERLY scan an APCO-25 system with VHF Frequencies? HELP!!
Scanning APCO-25 VHF
- Thread starter Rbtelee1
- Start date
- Status
What scanner are you using? It may vary.
But - If you are using a 'search' function of a specific VHF band to look for P25 signals, or if you put P25 frequencies in a bank to scan, you definitely want to make sure that you turn off DCS/CTCSS searching.
On a 996/396 for instance, you can set a PL/DPL or you can set it to search for a PL on any frequency found during a scan. You do NOT want to have any PL/DPL detection on whatsoever or else it will not capture the P25.
And on a 996/396, you simply have to be in mode when scanning (or if you entered frequencies into a group, then just make sure any P25 frequencies are set to FM - or possibly NFM as well).
Mike
But - If you are using a 'search' function of a specific VHF band to look for P25 signals, or if you put P25 frequencies in a bank to scan, you definitely want to make sure that you turn off DCS/CTCSS searching.
On a 996/396 for instance, you can set a PL/DPL or you can set it to search for a PL on any frequency found during a scan. You do NOT want to have any PL/DPL detection on whatsoever or else it will not capture the P25.
And on a 996/396, you simply have to be in mode when scanning (or if you entered frequencies into a group, then just make sure any P25 frequencies are set to FM - or possibly NFM as well).
Mike
I am using the BC996T
Rbtelee1 said:
Ok, then just do as I said. FM mode, NO PL/DPL set and NO PL/DPL Search set - turn off ALL PL/DPL. Then, if you are scanning and run across a P25 freq it should decode.
Mike
How is this accomplished if I am using Scan Control 6.0.0 programming it? I didn't see it listed?
Tony
Tony
I couldn't tell you off the top of my head. I make those changes from the front panel of the scanner (or you could use Control/Monitor Radio in Scancontrol).
All of this is covered in the book. I'm not one to instantly tell somebody RTFM (read the f'in manual) so I won't. But I do suggest that you do more than casually glance at the cover of the manual if you haven't already. When I got mine, I ignored the manual for two weeks. One day I decided to actually read it, and lo and behold I learned a lot more than I thought I would have.
This will turn off any CTCSS/DCS detection when you are using Service Search or Custom Search:
Press MENU, then select Srch/CloCall Opt, then push the main dial in
Select CTCSS/DCS Search, push the main dial in
Select OFF, push the main dial in
If you have created a conventional system and added groups to it, then you need to set the CTCSS/DCS off for each of the particular conventional frequencies that you have stored which you think might have P25 traffic on them.
Mike
All of this is covered in the book. I'm not one to instantly tell somebody RTFM (read the f'in manual) so I won't. But I do suggest that you do more than casually glance at the cover of the manual if you haven't already. When I got mine, I ignored the manual for two weeks. One day I decided to actually read it, and lo and behold I learned a lot more than I thought I would have.
This will turn off any CTCSS/DCS detection when you are using Service Search or Custom Search:
Press MENU, then select Srch/CloCall Opt, then push the main dial in
Select CTCSS/DCS Search, push the main dial in
Select OFF, push the main dial in
If you have created a conventional system and added groups to it, then you need to set the CTCSS/DCS off for each of the particular conventional frequencies that you have stored which you think might have P25 traffic on them.
Mike
Last edited:
- Status
