[time-nuts] Using digital broadcast TV for timing?

Chuck Forsberg WA7KGX N2469R caf at omen.com
Thu Feb 9 05:57:48 UTC 2012

Other than LightSquared, an event that made GPS go away would most likely
eliminate most interest in ultra accuracy time keeping.

On 02/08/2012 09:13 PM, Chris Albertson wrote:
> On Wed, Feb 8, 2012 at 7:48 PM, jerryfi<jerryfi_99 at yahoo.com>  wrote:
>> Thanks Paul.  You and Bob Camp provided some good updates/info.  It may present enough of a challenge/reward for someone to examine further.  I'm with you on the available time front - too many other projects/commitments to pursue further myself.  I'll be interested if Chris, or someone else, can make some headway though.
> OK if not DTV what other common signal that you could pick up without
> use of exotic equipment (so this entirely eliminates rotating neutron
> starts or "pulsars") what else can you get that has decent timing
> other then GPS and CDMA.   I'm not giving up on DTV yet.  The video
> signal is compressed so it may be basically white noise but I bet it
> is wrapped in some transport like packets that are regular.
> In practice GPS works well but a question came up here "What could you
> use if GPS went away?"    I said "I bet there is some signal all
> around us that just happens to have precision timing embedded in it.
> Maybe DTV maybe it's direct broadcast TV.
> --
> Chris Albertson
> Redondo Beach, California
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Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430

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