[ntp:questions] DRM: useless for NTP like services...

Uwe Klein uwe_klein_habertwedt at t-online.de
Tue Dec 12 23:34:15 UTC 2006


Max Power wrote:
> http://www.cl.cam.ac.uk/~mgk25/time/lf-clocks/
> The Digital Radio Mondiale standard for long/medium/short-wave digital audio 
> broadcasts (freely available for downloading as ETSI TS 101980) includes 
> time data, but like with RDS and DVB, the data format specification is not 
> really optimized towards high-precision clock synchronization and the DRM 
> COFDM demodulator needed is significantly more complex than the AM receivers 
> that decode the time signals listed above.
The receivers are essentialy zero-IF downconverters connected to an USB-port.
There are cheap kit sets available: 		

	http://www.elektor-electronics.co.uk/Default.aspx?tabid=28&art=51723

All other stuff can be done on the host cpu in software.

	http://sourceforge.net/projects/drm/
> 
> It is a shame that the NTP.org has not set up a working group to define 
> packet formats for RDS / DVB / DRM / AMSS.
> 
> 
uwe




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