On Thu, 05 Apr 2012 07:04:38 +0100, John Williamson wrote:

Mike Barnes wrote:
Mike Clarke :
On Wed, 4 Apr 2012 03:34:41 -0700 (PDT)
RobertL wrote:

On Tuesday, April 3, 2012 11:41:56 PM UTC+1, Brian Gaff wrote:
Don't some of them also use a german transmitter though?
I can also tell you something odd about a dab clock radio. Every
so often it jumps back an hour for no apparent reason.
Brian

and the PIPs are not synchronised with those on FM.
Yes, the time taken to process the original analogue input and convert
to digital means that digital radio and TV transmissions run a little
behind the real world.

More to the point the conversion back to analogue takes varying lengths
of time depending on the receiver. So digital outputs aren't even
synchronised with each other.

If you want accurate time, not taking into account the lightspeed delay
from orbit, take it from the GPS receiver in your satnav. Or use an
internet time checker, which compensates for the internet delay by
pinging the time server and adjusting its output accordingly. That
should get you within a millisecond or two.

The buses will still be up to 4 min. early or 7 min. late, regardless of the
clocks. What's the point of atomic accuracy when uncertainty overrides it?
--
Peter.
The gods will stay away
whilst religions hold sway