[time-nuts] TV Signals as a frequency reference

Mark Sims holrum at hotmail.com
Mon Apr 2 13:08:13 EDT 2018

I read that there is a requirement that the time data in the PSIP data stream has to be within one second.  

I have an over-the-air DVR that would mess up the time and recordings because it was originally not filtering the times the stations broadcast.   They finally modified the DVR firmware to do something like a median filter to throw out the outliers.   A local TV guru beat up on all the local stations with a copy of the FCC rules to get the stations to broadcast the correct time.   And don't me started on the ways the stations still mess up the daylight savings time transitions.  Many are a month, week, or day off.


> There is no requirement for us to inject time of any prescribed accuracy 
into the digital stream.

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