[evlatests] EVLA status: AR603, 23jul06 (Sunday)

[Ken Sowinski]

On Mon, 24 Jul 2006, mrupen at nrao.edu wrote:

> 20cm:
>    ant. 13
>      IFs AC no fringes
>      IFs BD horrible (worst or next-to-worst antenna)
>    ant. 14 pretty bad -- bottom quartile
>    ant. 16
>      IFs AC bad (bottom quartile)
>      IFs BD horrible (worst or next-to-worst antenna)
>    ant. 18
>      IF  A  horrible (worst in array)
>      IF  C  no fringes
>      IFs BD best of all EVLA IFs -- puts this in the top third of the antennas
>    ant. 24 no data
>
>  6cm:
>    ant. 13 no data
>    ant. 14 is excellent, as usual
>      no phase jumps when changing bands
>    ant. 16
>      IFs AC very unstable amplitude gains, and very low quality (worst
>        antenna by far)
>      IFs BD were quite good (among top 4 antennas)
>      no phase jumps when changing bands
>    ant. 18 no data
>    ant. 24 no data
>
>  4cm:
>    ant. 13
>      IFs AC no frings
>      IF  B pretty good (upper quartile)
>      IF  D middle of the pack
>    ant. 14 lousy (near the bottom), except IF A is in the middle
>    ant. 16 fine (upper quartile)
>    ant. 18
>      IFs A & B were middle-of-the-road
>      IF  C no fringes
>      IF  D near the bottom
>    ant. 24 horrible (near the bottom in all IFs) -- IF C esp. bad


There are HW problems that account for some of the above.
1.  The MIB in the AC L302 in antenna 13 seems to have died
     and is not responding.
2.  It was reported this morning that the 18C DTS was not working.