I keep hearing countless stories of people getting pulled over and then wanting to know why their RD didnt go off. It's time to address the issues. Ive been doing alot of testing and these are my findings. The three main reasons are...
1. Your RD sucks. This is usually the 80% of the time. Face it, you really dont know if there is a delay between the transmission and when your RD goes off. I tested a BRAND NEW OUT OF THE BOX 8500 x50 that wouldent alert to my k-band radar gun unless I held the trigger more than a sec. I could tap the trigger, get the speed, and the x50 never even peeped. The owner was pissed. Same thing with my cobra. Same thing with my friends V1 (yes, the V1). Basically, even two identical models dont give you the same results. My v1 worked fine. When I told him the results he said "well, it dosent do that on Ka band". I said, "Oh, really, and how do you know? Did you try it with a Ka band gun?" The point is that you need to test your RD with a real radar gun. Otherwise, for all you know, there could be a 2 sec delay before it goes off. And I can hit the trigger, get your speed, and stop transmitting all fast enough for the RD to never even go off. Its really scarry. I even had an old skool RoadPatrol XK that would go off when i bursted the radar, however the x50 wouldent. Dont get me wrong, all the units i tested would eventually alert to radar if i held down long enough. but some were up to 3-4 sec. If i was running a speed trap, why would i hold down for 3-4 sec, i would zap you in 1. I can continue to zap cars each for 1 sec and you wont get any advanced warning. Then you are next. I'm not trashing detectors at all. My point is that i tested 2 or more of EACH model, (two x50s, two bel 980s, three V1s, two cobra 9800s) and each one had VERY different results. Just cause you have a top 3 RD dosent mean its working as it should.
2. It was laser, and your RD didnt catch it. This is prob the case 9% of the time. Your laser detector either isnt sensitive enough to catch it when it hit the RD, or the officer was very steady and kept the beam off of your RD.
3. It was VASCAR and you didn't notice it. I highly doubt it.