When it is counteracted by IRinterferencemeasures, thefield ofview within the guidingheadalsoconsistsofIRimage produced by explosion and burning of IRdecoymissileorIR smoke shell.
TiVo fans know that there are multiple assignable addresses for TiVos to prevent them from interfering with each other in the same room, the Series3 acts exactly the same, although there are some over at TiVoCommunity.com that are complaining about interference from Plasmas and other sources of IRinterference.