Just bought a used 396XT.(Already own a 396T) When manually entering a new P25 system after entering the name, I can't pull up the option that says "Set frequencies" What am I doing incorrectly? Also, it asks me to choose between Standard Trunk and One-Freq Trunk. Is One-Freq Trunk a way of just entering the control frequency and letting the scanner find the other frequencies on its own ? Thanx for the answers to these 2 questions.