This is my test i ran on a x band door opener. 60% of the time it reports at x band and most of the time when you turn off x in the menu option it reports as K band.
This is because X and K are on the same sweep. Last night it was reporting x band and i turned off the unit and it reported at K band with the same strength.
So i went in to the menu option and turned K off and it reported back to X band.
Turning x off does not completely get rid of X band falses as most in my town report to K band. This is a very leaky handicap door opener at a bank.
[ame="http://www.youtube.com/watch?v=nXXIIFiB6Qs"]YouTube - whistler x sweep[/ame]