[time-nuts] timelab

[Magnus Danielson]

On 07/05/2012 10:21 AM, Azelio Boriani wrote:
> Don,
> what do you mean by "not getting them sequentially"? The stop signal should
> determine the rate of the samples and if the stop signal is the test signal
> then any non-uniformity in time is due to that signal. Maybe a good idea to
> feed the stop trigger with the reference to assure the best time
> uniformity. Once the sample is ready then feeding it at the exact time when
> it is available or deferred should be irrelevant. A process is ergodic when
> more than one statistic give the same result but in this case I can't see
> how to check for ergodicity. One move maybe to apply the average to groups
> of samples and see if the average is the same for every group of samples.
> We already know that this may not happen and the Allan statistic was
> introduced exactly to account for that.

It the time of the sample he means, and as a delay factor it should 
experience flicker and white phase noise in which case the assumption is 
fair.

The trouble is if he doesn't have stable values and in particular if it 
skips over measure. I tried to sketch that in the previous post.

Cheers,
Magnus