[time-nuts] Measuring TV delays

[Gregory Muir]

Reading all of this brings back memories of a project I was involved in back in the early 70's in the Denver area.  NBS-Boulder was experimenting with injecting their time standard into the video of the analog signal before it hit the transmitter.  We installed a prototype unit that was slaved to Boulder and performed the function of adding the time signal into the video.  Part of it also provided station sync slaved to the unit as well.  NBS then measured the system prop delay and adjusted the timing accordingly to compensate for any latency before it went to RF.  The experiment lasted for a couple of months and then the equipment was removed.

Alas... satellites and digital...  given buffering, processing and routing delays, you are sort of now on your own in this one-bit world.

Greg