In my experience, and I've seen others mention it as well, the new DSP reports frequencies that match other high end detectors. For instance, the NR DSP mounted to the front of my car routinely reports the same frequencies as my R3. The (possible) problem I might be seeing is that my rear standard NR antenna reports a slightly different frequency. I'm not sure if this causes issues with threat direction indicators (arrows) in ALPConnect or not. I assume there is some sort of tolerance the app uses to determine direction when the frequencies are a bit off. I know about the doppler effect, and this is not it. I can duplicate the results just by turning my car around in a parking lot using the automatic door radar. Would upgrading my rear antenna to a DSP result in a better performing system?