posted on Jan, 12 2012 @ 01:42 PM
While these folks in Colorado scratch their heads and wonder if aliens visited their neighborhood, I figured I’d address the fantastical, magical,
erotic world of garage door opener frequencies.
Mystery Signal Kills Garage Doors
Garage door openers use a frequency range of 300-400 MHz. The transmitters and receivers use rolling code technology, which means the frequencies are
sent in a specific programmed order. Like your email password, only the right order of frequencies in that 100 hz range will open the door.
This is for your saftey.
However, new garage door openers use only 315 MHz. Since 2005, new garage doors use the 315 MHz frequency range to avoid interference from the Land
Mobile Radio System (LMRS) used by the US military which drifts in and out of the 100hz interference window of the older “rolling code” garage
The LMRS is the US Dept. Of Defense’s new shiny communication system, it’s extremely powerful, and chances are if you have bizarre garage door
problems like these folks in Colorado - it’s likely due to this type of interference. It operates *powerfully* on a rolling bandwith of frequencies
390hz and below that apparently just devastate part 15 devices (interfere with remote control devices and such):
*something of interest is that most of these stories wind up existing only as excerpts as their orignal stories eventually get pulled.