Here in Silicon Valley, it's used by smart meters. All the short duration blips in the waterfall are gas and electricity meters. http://www.w6rz.net/gqrx915.pn

Here in Silicon Valley, it's used by smart meters. All the short duration blips in the waterfall are gas and electricity meters. http://www.w6rz.net/gqrx915.png http://www.w6rz.net/gqrx915.png