Unknown Signal Blocking Ottawa Door Devices

CBC News
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Ottawa (Canada):
Many automatic garage doors in Ottawa have suddenly, and strangely, stopped working, due to a powerful radio signal that appears to be interfering with the remote controls that open them. J.P. Cleroux of Ram Overhead Door Systems says the phenomenon began last weekend. "It affects a 25-mile radius. That's huge," said Cleroux.
Angolan Ambassador Miguel Puna's operation is one of those affected by the problem. He can no longer open his embassy's electronic gate. Two companies that have plotted the reported problems on maps say they appear to cluster in the Byward Market area just east of Parliament Hill, and a corridor leading southeast from there.
The signal is transmitted on the 390-megahertz band, which is used by virtually all garage door openers on the continent.
That's the same frequency used by the U.S. military's new state-of-the-art Land Mobile Radio System.
The U.S. Embassy denies any transmissions on that frequency. So does the Canadian military.
Nov 04, 2005