Yep, it carries a lot of information including date/time, try this link
http://www.freescale.com/files/microcontrollers/doc/app_note/AN1597.pdf
searching on "198khz phase modulation" will hit a lot of related sites.
But I believe, like most AM services, the Beeb Radio 4 LW is doomed...
Grahame
On 24/09/2013 20:05, dr pepper wrote:
A question for those of us in the UK.
I allready have a frequency standard that uses radio 4 on long wave to
synchronise to, however the carrier has phase modulated data on it, I
believe this is used by the power companys to control heating and the
likes.
Does this signal contain the time of day, and any info on how the
protocol works?
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