I just purchased two XTR 690 SE's to replase older Whistlers that were not performing well detecting Ka. However, both of them (in my car and in my wifes car ) are falsing to the point of being useless. They false on Ka, Ka POP, and Ka and K Pulse usually strength 9.
This happens in our driveway, in the neighborhood, city streets, county roads, state highways and the interstate. Without exageration, we are unable to travel even one mile without multiple Ka, (POP and Pulse) indications. There are a couple of locations in the neighborhood where I regularly detect specific Ka frequency IDs but my wife just gets a Ka strength 9 signal .(Unusually we get no Xband falsing even in Highway mode in places where our old detectors would always pick up door openers etc.).
Currently running Filter 2, Ka with frequency ID, X on, K on, POP, Safety Warning, etc. I will try turning off POP, Safety Warning, etc.