[time-nuts] Extended length Phase Noise Measurements with TimeLab

Bob Camp lists at rtty.us
Fri May 3 16:45:46 EDT 2013


There are some warning messages in TimeLab about "runs with more than xx,xxx,xxx,xxx,xxx,xxx samples in them may harm poor fuzzy animals". I've routinely exceeded them with no obvious damage to the local environment. I may not have the wording of the error message quite right….

If the resonance on the vibration table is enough to push the frequency beyond a certain point, all of these boxes get a bit bothered. The 5120 is by no means unique in that regard. The trip points vary from model to model. The ones I seem to remember were in the 10's of ppm. 


On May 3, 2013, at 2:21 PM, Tom Knox <actast at hotmail.com> wrote:

> Recently I was looking at a co-workers Lab View measurements taken with a 5120A. She is studying vibration on Phase Noise. I asked how Lab View compared to TimeLab and she said in many ways she prefers TimeLab but ran into a problem. The research she is currently conducting requires collecting data in extremely long measurement periods beyond the TimeLab limits. Is she missing something? If not is measurement length an easy fix? One other problem during her project was related to the 5120A, occasionally the vibration must hit a resonance and the 5120A stops measurement saying measurement  parameters were exceeded. It would be nice to be able to adjust or disable that feature. Thanks in advance for your ideas.
> Thomas Knox
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