Daily. Today is TG 48944. Set the scanner to search talk groups. Check with RR monthly to see if there are any additions to the local (to you) site (Pal 800 antenna). Sometimes extra frequencies and/or control channels have been added. Or, you could program your scanner to search for new control channels in your area and then match them to Pal 800 in the RR database. Add the new ones to your programming.
Also add the new talk groups appropriately.
This is correct, but to be accurate, the talkgroups don't really change. It's certainly true that some talkgroups are changing, and 48944 is one that's been added to the mix in Troop 2 recently. 7536, 7664, and 52176 are still in use, for now.
What you are experiencing is patched talkgroups. This allows one dispatcher to work multiple channels as if they are a single channel. And it lets all the troop 2 folks talk directly with each other regardless of what channel their radio is tuned to.
When the patch is established, one talkgroup is the designated "supergroup." This is the talkgroup that appears active on your scanner. This is what changes from time to time. Depending on how your radio handles patches, or how you have it set, will determine whether you'll hear traffic on a patched talkgroup or not.
The newer GRE scanners (PSR-500 and its equivalents and the PSR-800, maybe others) support patches, so that if the 4 talkgroups listed above are patched, you'll hear the traffic if you have any one of the four talkgroups programmed and scanned. I imagine newer uniden scanners offer similar support. Older scanners do not fare so well, and if you aren't scanning the talkgroup that's chosen as the "super-group" then you're not going to hear the traffic.
Status bits play in to this as well, but I won't muddy the waters with that.
Bottom line, if you want to hear SCHP Troop 2 reliably, program in 7536, 7664, 52176 and 48944 to ensure you hear all the traffic. Plus the tac channels, if you want to hear that too.
Brian