After using at the Great Lakes Regatta last week and some testing in my shop, I know for a fact that it does give FALSE readings due to harmonic intermodulation between frequencies. I powered up six of my radios, and had ten solid lights: the six my radios were on; and 4 "ghosts". As I turned off radios, the ghosts would go off or sometimes jump to another frequency. It's not completely fool proof, but it does help the impound guys.
Edited By chips on 1122006847