I get some incredibly good P-25 performance on an 800 Mot Type II system that is 20 miles out that most people complain about the digital audio cutting out. I say incredibly good because while there are dropouts and some pixelizing of the sound, my 396xt would sound unintelligible with this audio. However I find that on other systems where my xt is reliable, my PSR 800 is not, and that is in particular UHF T-Band systems with consistent low but stable P-25 signals, and other systems that may be a little too far, but since I can pick up the CC I wonder if I can get at least some of the audio. So what are the DSP settings, and should I play with them? What do they do? Has anyone changed them and gotten good results?