[time-nuts] Time/freq from digital TV

Alan Melia alan.melia at btinternet.com
Sat Jun 13 21:03:22 EDT 2009


This may not relate to the USA but a couple of years back I had an
interesting chat with a BBC engineer at an NPL Time and Frequency gathering
at Teddington. His comment was along the lines of....."....well there is as
you realise not need to sync lines and frames nationally now because all the
network content travels digitally even though we have only just started a
phased change-over. The frames and line syncs broadcast will be probably
derived from a "good clock" but it will not be a single traceable unit as it
was. There is no telling how good the clock is, though it will probably be
better than absolutely necesary.

Alan G3NYK
----- Original Message -----
From: "Hal Murray" <hmurray at megapathdsl.net>
To: <time-nuts at febo.com>
Sent: Saturday, June 13, 2009 11:18 PM
Subject: [time-nuts] Time/freq from digital TV


>
> My radio has many news stories about the end of analog TV.
>
> What sort of time or frequency can I get from a digital TV signal?
>
> Now that frame buffers are common, does each station use its own master
clock?
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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