[evlatests] EVLA, April 6.

[Rick Perley]

    Some of this can be explained easily:

    1) Ant 18 has only IFs A and C, so nothing from B or D can be expected.

    2) Ant 18 has no LSC converter, so no L or C band data can be expected.

    3) Ant 18 has no C band receiver either. 

    4) The lack of B or D data from antennas 13 or 14 would (I think) be
caused by a non-functioning L302-2.  This needs to be looked into. 

    5) The only remaining mystery is the lack of data from antenna 18C. 
There should be something here, since good data from 18A was obtained. 
This needs to be followed up upon. 

    Unhappily, the winds are still howling up at the site.  We continue 
to wait ...

vdhawan at aoc.nrao.edu wrote:

>A bit of data was taken earlier today in line mode, 12.5MHz, to check 
>delays. Reference pointing was used to mitigate pointing errors.
>
>L, C, X band data were taken before the wind picked up.
>
>Basically the delays look OK. However, some IFs produced no data, and
>some were sans fringes. Details below.
>
>Vivek.
>
>---------------------------------------------------
>
>G = Good, about the same as VLA.
>D = Dead, autocorrelation bandpass but no fringes.
>N = No data at all.
>
>L Band
>
>ant    1RR    2RR    1LL    2LL
>
>13     G      D      G      D
>
>14     G      D      G      D
>
>16     G      G      G      G
>
>18     N      N      N      N
>
>
>
>
>C Band
>
>ant    1RR    2RR    1LL    2LL
>
>13     G      D      G      D
>
>14     G      D      G      D
>
>16     G      G      G      G
>
>18     N      N      N      N
>
>
>
>X Band
>
>ant    1RR    2RR    1LL    2LL
>
>13     G      D      G      D
>
>14     G      D      G      D
>
>16     G      G      G      G
>
>18     G      D      N      N 
>
>---------------------------------------------------
>
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