[time-nuts] TV Signals as a frequency reference

[Bob kb8tq]

Hi

My comments really were a bit brief…. indeed there *are* clocks in the modern
signals. Those clocks come over as part of the signal you get. The must be a 
way to build something that would get at those clocks. 

You still have the same basic issue as with the “old” signals. Does it go through
a satellite link? Does it come straight from a Cs based studio? Does it get regenerated
against an OCXO or a TCXO? All of that will make it a good reference “some of 
the time”. Working out when that is …. good luck.

You probably would do better to build a gizmo to pull timing off you local cell towers. 
The hardware to do it is relatively well documented. As long as you are careful about
which system you use, the timing should be GPS based …. 

Ok, so the issue is an alternative to GPS? Well one of the “likely sources” for 
a modern TV broadcast setup would be a GPSDO. The same thing for the modern 
digital FM broadcast setups. I have good reason to make this claim ….. :)

Bob

> On Mar 31, 2018, at 1:43 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
> 
>> As noted earlier, color burst references were a big deal a long time ago.
> 
> Thanks.  I was fishing for something modern, maybe a bit clock out of the 
> digital receiver.
> 
> I'm assuming that the digital stream is locked to the carrier.  That may not 
> be correct.
> 
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
>