[TenTec] BPL, RFI & FCC

[Stuart Rohre]

The garage door openers I have serviced have a way to change which "channel"
they operate on, in case the default setting duplicates a door opener on the
same street or block.  There is usually a dip switch, for example, to change
among various codes for channels.  Not maybe that is technically a modulated
code, and not changing the oscillator frequency, but I think I saw one that
swaps caps, and that would be changing the carrier oscillator.

-Stuart
K5KVH