im perfectly fine with the NAS ..with further research into the fcc licensing for each of these counties in my area, it seems to be quite a few newly listed freqs associated with this system( though not listed on the rr page for the system) and seeing how the pro96 doesnt do the 700mhz range, ill be setting up a few rtl sdr dongles in the next few days and get the correct info on whats valid and what isnt..though some of the newer freq listings may be intended for use when phase 2 is put into play..
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Control Channel Programming On NAS
- Thread starter tradecraft6f
- Start date
So you are perfectly fine with something you know nothing about and run the risk of 1 bricking your radio and 2 interfering with public safety communications which comes with consequences you are not going to be happy with.
Come on guys... We all started somewhere. I can understand a post or two highlighting the safety concerns of incorrectly configuring NAS, but every other person, or multiple posts from the same people pointing out how little someone knows isn't helpful to anyone.
Since others have adequately explained the safety risks, and possible legal repercussions for interfering with a public safety system, here's some baseline information:
A P25 trunked radio site will designate a primary control channel and secondary control channels. The site will attempt to use the primary control channel when possible and switch to secondary control frequencies when the systems believes it's beneficial (many reasons why it may). Secondary control channels can be utilized as voice channels by the system when they are not in use as control channels.
A site control channel will broadcast a list of neighboring site control channels as well. Again, the system controls all of this and no Tx is required to the system to receive this information. My cheap RTL-SDR dongles can pickup all of this information from SDR-Trunk and other trunking system decoder software.
You always program in EVERY control channel, primary AND secondary for a site. Sometimes Radio Reference DB may not be up to date, which is why it's good practice to use and SDR or scanner to ensure the site you are on matches Radio Reference DB.
The cool thing about a quality scanner is that it will read all of this information and save it all automatically for you. If you want to learn, I can understand wanting to play with an SDR and NAS.
Since others have adequately explained the safety risks, and possible legal repercussions for interfering with a public safety system, here's some baseline information:
A P25 trunked radio site will designate a primary control channel and secondary control channels. The site will attempt to use the primary control channel when possible and switch to secondary control frequencies when the systems believes it's beneficial (many reasons why it may). Secondary control channels can be utilized as voice channels by the system when they are not in use as control channels.
A site control channel will broadcast a list of neighboring site control channels as well. Again, the system controls all of this and no Tx is required to the system to receive this information. My cheap RTL-SDR dongles can pickup all of this information from SDR-Trunk and other trunking system decoder software.
You always program in EVERY control channel, primary AND secondary for a site. Sometimes Radio Reference DB may not be up to date, which is why it's good practice to use and SDR or scanner to ensure the site you are on matches Radio Reference DB.
The cool thing about a quality scanner is that it will read all of this information and save it all automatically for you. If you want to learn, I can understand wanting to play with an SDR and NAS.
ive found out in the past few days i was correct on one cc' being off nearby..one site nearby isnt even working at the moment..i found this out by using 2+1 extra rtl sdr dongles on SDR TRUNK..so, just for test purposes in earlier posts i had all freqs for local sites programmed, i knew the primary cc and alternate cc..but as ive found out, the one local site is not working currently, its not emitting any signal from any cc's to whats listed on rr, So Go Figure..i know how to safely utilize nas, so by testing by adding all freqs listed and by further research using SDR Trunk its shown that at least one locally rr listed site isnt currently up and running, i expect another site in the adjacent area isnt working either.but i expect updates are being done for the future phase 2 integration and that makes sense with the extra fcc licensed freqs being listed , but not listed under the system directly in rr under any of the sites, but can be cross referenced by call sign in the fcc list associated with the sites..these unlisted newer freqs are probably going to be used for the phase 2 system near future upstart.i also noticed that some other sites in the area have had recent "upgrades" or work done.
