I'm not at all interested in the new data format, so that's no big deal.

Thanks for the links. Here's the link for the devices marked "NXYAMBGP2":

http://apps.fcc.gov/oetcf/eas/report...'NXYAMBGP2'

There's a whole lot of extra active devices in this one too, other than the PIC microprocessor.

EDIT: It looks like a 5 MHz resonator or crystal, so there's no way the PIC12C671 is generating the carrier by twiddling its pins.