I would not assume the 3.58 signal is accurate. The video could be running through a processing amplifier and being re-generated at the transmitter site. This is almost always done to eliminate errors from the microwave of fiber equipment. There is also the need to maintain sync to the transmitter in the event of an interruption from the studio.
We have four TV transmitters on the air, each has a different method of determining their operating frequency. Even locking to GPS is no guarantee the frequency is correct as there are often mixers and TCXO oscillators involved.
I did use a counter locked to GPS to set my K2. The reality is the end results would of been just a good using WWV.
73 Scott N0AR (and yes St.Paul MN did have 20" of snow...ask my back :)
> If you are receiving a network ... as opposed to a local ... TV
> program, the 3579.5454 NTSC color burst signal from your TV will very
> accurate. It's locked to the network's frequency standard, which is
> in turn locked to the NBS standard in Boulder.
>
>
>That was true at one time, but is it still the case? I recall reading
>that with the switch to digital video distribution color burst is
>locally generated and hence not tied to the NBS standards.
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