What systems are you referring to? Valley 2-way and TWR Communications are LTR so you can listen to them with your PRO-97 (guessing, but didn't look at the specs for that model) which are analog. But, the majority of public safety is on the WVIRP (SIRN) system. If all you want to listen to business radio, then you're set.I saw the TRUNKED option in the WV RR guide. However, I am not sure what LTR refers to. Are these analog? Thanks.