Seems to me CFLs and other loads switching on and off would affect the
60 Hz waveform
enough to make microsecond measurements meaningless.
On 12/17/2014 01:03 AM, Charles Steinmetz wrote:
Hal wrote:
What are you going to do with data from the line accurate to 1
microsecond?
Me? Nothing. I don't find the meanderings of the mains frequency all
that interesting, aside from observing them from time to time via the
sweep second hand of a synchronous wall clock. But lots of other
folks do (including our fearless leader, tvb), and they like being
able to correlate grid events to single-digit uS (lightning strikes,
sections of the grid going out, etc.). That said, I didn't slave away
trying to get the ZCD jitter below 1uS -- I anticipated that it would
be, just because there's nothing in the design to prevent it, so I
wasn't surprised when it worked out that way.
Best regards,
Charles
=========================
Everything works if you let it.
Corpus C. Redfish
=========================
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--
Chuck Forsberg WA7KGX c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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