I puchased a BCD536HP base model scanner to continue listening to Worcester MA police frequencies,Im only 18 miles away in North Brookfield.The system used in City of Worcester changed from a EDACS to P25. I never had an issue with my old Uniden BCT8 scanner receiving the Edacs system frequencies from here.Im only using the antenna thats included in the box. But that's how I also used the older model. I also drove to home in the City of Worcester and plugged the scanner into an outlet and I was picking up the P25 frequencies fine. Any Idea's what the problem might be ? Thankyou. dpw5rp