I think I had so many because of all the sports cars and bikes with radar detectors out in the Catskills and Hudson Valley of NY this last sunday. Each time I had a POP alert a car was coming by really fast.
And what is POP mode, well on the X50 you can turn on or off different bands (and even individual frequencies). A lot of people turn off X band because of the false alerts found in the city. I leave the X band on because I found a Mass Trooper in the Berkshires running with X band, which is very tricky because you'd think its a false alarm or maybe the state just gives the Troopers out in the wild western Mass. area all the old garbage equipment. Anyway the detector comes with the POP mode off for some reason, but after all those false alarms I think I know why they ship it POP off.
I think I'm going to leave POP on, I can use the false alerts to make sure I can hear my screamer.