[time-nuts] Chronometer contest sponsored by IEEE Spectrum
hmurray at megapathdsl.net
Sat Dec 1 13:17:56 EST 2007
> The thing is watches rates are dependent on how you personally wear
> them. Some people's wrists are warmer than others, some people take
> the watch off at certain times of day, others don't... If you wear
> the watch normally, and measure your personal offset, you can adjust
> the crystal to compensate for that change. The watch won't be any
> more accurate at any given instant, but it will stay spot-on over the
> course of a week.
What's the ballpark for a personal offset?
> If you don't have a reciprocal counter, such as a 5370B, you can also
> use a good fractional /N synthesizer, such as the 3666[a,b,c] and an
> oscilloscope. Put the 3666 on the horizontal axis, and the coil on the
> vertical axis. Adjust the synthesizer until you get a good stable
Would it be easier to see any drift if the phase was set to make a line
rather than a circle?
A small shift in a circle just makes a not-round circle. A small shift on a
line makes a slight opening.
Or is the drift so huge that this question isn't interesting. (just wait a
bit and the picture will change)
These are my opinions, not necessarily my employer's. I hate spam.
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