A question concerning the car remotes; door lock, headlights, etc.
Each car/handset must be a matched pair, regarding the ID and security codes. Obviously only one car in the parking lot ought to respond.
Are the ID codes determined by each manufacturer, as they choose? Or is there an intern'l body which allocates them, such that each is guaranteed unique, just as every telephone has a unique number?
Additionally, anybody know anything about their modulation methods, or FCC regs? i.e. simple on/off key?