Reply to post: Re: White Space devices

Dust off those White Space devices: New rules finalised by Ofcom

Fred Goldstein

Re: White Space devices

No risk if the new rules are a tenth as strict as the new, supposedly looser rules in the US. A device here can't use a channel if within some miles of the outer edge of a co-channel protected contour, or, except for 40 milliwatt portable devices, within a much shorter distance of an adjacent channel's protected contour. Until a recent change you thus needed a gap of three adjacent empty channels to use the middle one. Now you can straddle the boundary between two adjacent empty 6MHz wide channels (US channels are narrower than 8 MHz UK ones), leaving 3 MHz of protection, with a whopping 100 mW. These sorts of power levels are as likely to interfere with over the air TV as a squirrel is likely to knock over a tower by flying into it while looking for a moose.

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