The si/di needs to be set to 800khz while the 360 is running.If si/di are set to 455khz while the 360 is running , it's usable, but there will be interference showing on the screen.The same thing applies for getting the best si.while running si on 455khz, run the di on 800khz or the other way.wway.works the same.Or just turn one or the other off, if it's not being used at the time.once the 360 is turned on, it doesn't take long to figure out if there's another 455khz running also.