hello couple of questions i want to scan salem county pd. like salem pd- carneys pt pd- pennsville pd- pennsgrove pd-woodstown pd. is the salem county public saftey system the best to use. where you have to set up the base &offset etc.. in the 500mhz range. also im also scanning the newjersey troop a system and came across this tgid-34928 {bridgton,port norris,woodstown how can you tell which police are talking since there are 3 diffrent ones how would you tell, or cant you, any help on these 2 questions .thanks in advance