Azelio, you're correct. That's why I put 'single' and 'normal' in
single quotes - to highlight the fact that the terms weren't really
correct. I see now that just saying that single mode on or off might
have been less confusing.
Ed
On 2017-02-02 11:00 AM, Azelio Boriani <[email protected]> wrote:
It seems that "normal mode" is not a mode: from the operator's manual:
SINGLE
When on, the result from each measurement is displayed.
When off, the counter averages all data captured during the set
measurement time.
No normal mode but single mode on or off. The measurments look better
when averages are on...
On Wed, Feb 1, 2017 at 8:46 PM, Ed Palmer<[email protected]> wrote:
>Hi Magnus,
>
>When you did your measurements, did you use 'single' mode or 'normal' mode?
>
>When I got my PM6681, I wanted to check the interpolater to make sure that
>it was healthy. I couldn't generate pulses over the whole range, but over
>the range of 50ns to 28 ns, my StdDev readings in 'single' mode were in the
>range of 2.6 - 3.6 e-11, i.e. similar to the example in the manual. In
>normal mode, my readings were significantly better. So I'm assuming that
>'single' mode was the correct mode to use.
>
>FYI, my unit was factory calibrated with a 4.05 ns pulse according to the
>PUD command, so I guess that's what gave the best results. I also see that
>the example in the manual was for a 4.29 ns pulse. Does that suggest that
>shorter, harder to generate, pulses are important for this calibration?
>
>Ed
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