I fly a JR and Futaba 9CAP amongst others. Our standard qual validation is to fly to as high an altitude as our test pilot can see and that is way beyond my line of sight (Howie has eagle eyes) then collapse the transmitter antenna and fly as you normally would fly. We use the on board recording feaure to confirmt that only a few frames are ever missed and there are no glitches.

Everyone should have the output spectrum checked for their transmitter every two years. Unfortunatley, checks of transmitters of all makes in out facility (the check is at no cost except that you pay the shipping) for buyers of our receivers show many brand new transmitters off by as much as 1500 hz. Beyond 800 hz, any FMA receiver is narrow band enough to let you know. Of course this means we almost never get any reports of interference. The FS8 with the fail safe has been demonstrated to fly through interference caused by turning on a second JR 10X on frequency. Since you live in Sterling, just half an hour away, come see us and we will check that rascal for you.