The PSR-800 is currently the only scanner capable of P25 Phase II TDMA. None of the other GRE, Radio Shack or Uniden scanners work on P25 Phase II TDMA.
"TDMA" is a method of dividing a frequency into two time slots, which is used by some P25 systems, but it is not the same as P25. Phase II TDMA is a standard for newer P25 systems that doubles voice channel capacity.
As far as Bucks County specifically, the current system is a Motorola Type II using P25 digital voice in the UHF band. The future system is P25 in the 700 band. Even though the new 700 P25 system is listed as "Motorola X2-TDMA", I suspect that is wrong and it's really a Phase II TDMA system. That's a moot point, however, since the PSR-800 is the only scanner to support any form of TDMA, be it X2 or Phase II.
So what it boils down to is this: Your BCT8 will not monitor either system because it's an analog scanner, as I pointed out in your other thread. You will need a digital scanner to monitor either Bucks County system.
However, and this is the key point: Just about any digital scanner will work on the current Motorola UHF system, however if you're trying to plan ahead for the future 700 system, the only scanner currently available that will work is the PSR-800. There is simply no getting around the fact that the PSR-800 is the only scanner that can handle Phase II TDMA, and Uniden has not (and will not) release any information on any possible upcoming models that might support Phase II TDMA.
So, you've got a decision to make. You can buy a digital scanner now to listen to the UHF system, but unless it's the PSR-800 it won't work on the future 700 system, so eventually you'll probably have to buy one that will work with Phase II TDMA. Or buy the PSR-800, even though it's not your first choice, and you'll have a scanner that will work on the future 700 system.
