On 06/22/2016 01:25 PM, Jamon Camisso via talk wrote:
On 2016-06-22 17:46, D. Hugh Redelmeier via talk wrote:
Remember, he truncated the values (grep does not round).
My best guess: the average of the readings would be from a distribution centred on 59.996435 (0.005 larger than Lennart calculated). It could be as low as 59.991435 or as high as 60.991434, assuming six digits of precision in the fraction. I know nothing about accuracy of the device.
Summary: the 60Hz hypothesis is not excluded by the evidence. Far from it.
P.S. "grep -c" eliminates the need for "wc -l". and sort/uniq eliminate even more:
cat /tmp/MGC|sort -n |uniq -c 16 FREQ value 59.95 99 FREQ value 59.96 282 FREQ value 59.97 464 FREQ value 59.98 459 FREQ value 59.99 385 FREQ value 60.00 302 FREQ value 60.01 144 FREQ value 60.02 68 FREQ value 60.03 3 FREQ value 60.04 --- Talk Mailing List talk@gtalug.org https://gtalug.org/mailman/listinfo/talk
Another question is how accurate is the device doing the measurements. If this is a UPS then the monitoring is not designed for accurate frequency measurements. Get out your 6+ digit frequency counter and then run the tests. -- Alvin Starr || voice: (905)513-7688 Netvel Inc. || Cell: (416)806-0133 alvin@netvel.net ||