with the se pro after turning it on and noise cancel,at what point does the detector automatically adjust the sensitivity if not using the factory preset.does one still have to do it manually and if so where does the semi-automatic come in.to me it just sounds like a bit of flim flam to enhanse the product.manual setting i understand, most detectors you have to set the sense before operating.i have read the chapter on this many times and still find explaination vague.maybe their's some one here that can explain it better,thank you .emubob