[evlatests] Stress tests form tracking

[Emmanuel Momjian]

Considering that many in the evlatests group are not aware of the terms we
have adopted for the "Stress Test" outputs, I am attaching the description
document of the Stress test results. This was provided to the operators and
gives all the necessary details.

Here I would like to highlight a couple of terms to avoid any confusion:

The so called "Uncalibrated gains" are amplitude-calibration gain factors.
They have been called “uncalibrated” because the visibilities were not
calibrated with the switched power before deriving these gain factors.

The so called "Calibrated gains" are also amplitude-calibration gain
factors. but here the visibilities were calibrated with the switched power
before deriving the gain factors.

 For more details, please see the attached.

Emmanuel


On Wed, Jan 16, 2013 at 8:32 AM, Eric Chavez <echavez at nrao.edu> wrote:

> Great,
>
> Here is a link to the work orders for System Eng.
>
>
> https://e2e.nrao.edu/mainsaver/AssetGroups?assetGroup=System+Eng.&sortType=Work+Order&sortOrder=Ascending&submit=Generate+Report
>
> The three forms on the bottom are old and may still exist, is there any
> way we can check on them? They may be attributed to the pdiff
> compression problem which is currently under investigation. ONLY a guess...
>
> Antennas 18, 21 and 25 were some the first antennas to be investigated
> for pdiff at L, S and C bands. These receivers in these antennas had
> attenuators installed to attain the proper level for the LSC converter
> and the LSC converters were all retrofitted with filters lower
> conversion gain.
>
> Thank you,
>
> Eric
>
> Vivek Dhawan wrote:
> >
>
> > Hi Eric,
> >
> > thanks for doing this. Let me know (or send me an email pointer) if you
> think
> > I can help diagnose something. If there is a regular forum where these
> will (or
> > already are) be discussed, please add me to the distribution list.
> >
> > Cheers, Vivek.
> >
> >
> > On Tue, January 15, 2013 14:00, Eric Chavez wrote:
> > | Hello,
> > |
> > | I have moved all stress open stress test related Mainsaver forms to
> > | "System Eng./Under Investigation."
> > |
> > | Those forms that were attributed to pointing problems have been closed.
> > |
> > | I know the moves, the switch replacements and other groups work on the
> > | antennas might change the results of the next stress test. I would like
> > | see which antennas are repeat offenders, for then I can begin trouble
> > | shooting them.
> > |
> > | Thank you,
> > |
> > | Eric
> > | _______________________________________________
> > | evlatests mailing list
> > | evlatests at listmgr.cv.nrao.edu
> > | http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests
> > |
> >
> _______________________________________________
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>
>
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