Re: X10 -> UPB?

[James Russo <jr@xxxxxxxxxxxxxxxx>]

> The length of one 60Hz cycle is 16,667µS (1/60).
> The length of one-half cycle is 8,333µS (1/120).
> The UPB "window" starts at ZC+8000µS (or 333µS before the next ZC).

This right here isn't clear. They only say Tframe which is not defined.

> The total "window" is 160µS, divided into four 40µS segments.
> The UPB pulses are expected in the first half of each 40µS segment.
>
> Like I wrote, the drawing is confusing. ;)

At least it's not TBD like so many other sections of the document.

> Since the "pulses" are actually noise spikes which by definition are of very
> short duration (2-3µS), they probably merely look for any rising edge within
> the window.

Sure. That makes sense.

-jr