[time-nuts] Line Voltage frequency Interface morphed to batteries

[Steve .]

Hal,

I don't know what I'd do if i had reliable power like that. Here at work
(the lab) It's normal to see outliers of anything between 58hz and upper
63. As I had commented before, this power distribution in this area is
terrible (South Western Pennsylvania)

Steve

On Wed, Nov 30, 2011 at 3:06 PM, Hal Murray <hmurray at megapathdsl.net> wrote:

>
> > I hooked up a 47k resistor from line to the 50 ohm input of my 5334B and
> it
> > "just worked."
>
> That's something I wouldn't do.  It's too easy to forget to push the 50 ohm
> button.  I might do it if I had a handy 50 ohm terminator built into a BNC
> pass through.  That would be easy to verify with a quick glance.
>
>
> >  I am watching the 60 Hz drift all around as I type this (although not
> all
> > that far, seems to be holding within 0.01 Hz tonight).
>
> I'm surprised you are that close.  How long have you been watching?
>
> I think 0.1 Hz (low) is where the US power companies have to file paperwork
> so they try (very) hard to avoid getting that low.
>
> Here is what I saw.  Each data point is averaging over 10 seconds.
>  http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-Jul11-12-freq.png
>
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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