[time-nuts] TV Signals as a frequency reference

Tisha Hayes tisha.hayes at gmail.com
Fri Mar 30 21:01:12 EDT 2018


It might of been fairly easy to use an old NTSC television signal as a
frequency reference (lumina, chroma or audio carriers). Now that it is
converted over to ATSC it would be much more difficult to recover a
reference frequency using readily available electronics.

You would have a much better chance of locking on to a commercial FM
carrier (88-108 MHz). Some are quite accurate with less than 0.5 Hz of
error.

If you want both time and frequency then a GPS source is your best bet. You
can get something like a ebay surplus Trimble Thunderbolt for less than
$150.

Tisha Hayes, AA4HA

*Ms. Tisha Hayes*


On Fri, Mar 30, 2018 at 5:13 PM, Hal Murray <hmurray at megapathdsl.net> wrote:

>
> fgrosz at otiengineering.com said:
> >   Now that analog TV has gone away, so
> >   have these signals.
>
> What do the local TV stations use for a frequency reference?
>
> Are there low cost receivers that also produce a good reference frequency?
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
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