The NBS published a booklet on constructing a device that could receive
the sync signals and provide a reasonable secondary frequency standard.
I still have that book around in some box. I should look for it.
IIRC, the signal originated from a Cesium standard and was used to sync
the color so MTM didn't have purple hair !!
73, Dick, W1KSZ
http://tf.nist.gov/timefreq/general/pdf/237.pdf
"Long-Term Continental U.S. Timing System Via Television Networks"
http://tf.nist.gov/timefreq/general/pdf/469.pdf
"Nationwide Precise Time and Frequency Distribution Utilizing an Active Code Within
Network Television Broadcasts"
Visit: http://tf.nist.gov/timefreq/general/publications.htm
and search for title: television
/tvb
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