i have had these (lowpower) channels in my 250-D for quite sometime , i travel up and down 91 Sringfield to Hartford everyday not once but twice a day , and have never recieved anything , except Ma. state police on 868.9375 which use this freq up in the quabin reservoir area. i thought i did hear 2 ct troopers make a reference to low power about a month ago , but not paying attention i dont know if they were talking about freqs. but no , i havnt ever heard anything on them , when in conventional mode i would assume these have a pl. or dpl programmed in them . thats my 2 cents.