I have a BCD996xt. I am monitoring a police agency that is roughly 35 miles from my location. They operate on 155mhz and are digital. I have a 1/4 wave 2 meter antenna, and since I started using it my signal is aweseom, full 5 bars. But here is the catch. If I'm sitting stationary lets say at a red light, stop sign etc. it works just fine. But when Im driving the signal gets weak and the sound is choppy and blocky. Best way to describe it, it sounds like when u are talking to someone on a cell phone and they have weak service. Be advised I am just doing in town driving so im not getting over 45mph. I'm just looking for advice as to why its doing this, and if there is anything I could do to improve it so I can drive and listen rather then have to stop somewhere. Im open to all suggestions. - Thanks