[evlatests] ea02 report

Jim Jackson jjackson at nrao.edu
Tue Jun 17 15:28:53 EDT 2008


The HVAC shut down in Ant 2 last night after a power glitch. 
According to the archive, the L301-2 failed while the temperature was 
high.   It will be replaced tomorrow morning.

Jim


At 01:11 PM 6/17/2008, Ken Sowinski wrote:
>Antenna 2 is getting better.  C band receiver cables are now properly
>connected.  Pointing now looks good enough for an X band pointing run,
>which will likely happen next week after the north arm antennas are
>moved.  Delays and focus have been set for all bands.  All bands but
>P band have been tested and shown to work.
>
>Two problems remain.  BD is not working at L and C bands.  The
>problem looks like an L301.  It does not lock when at C band and does
>not seem to be doing the right thing at L band.  Rebooting it did not
>help.  It worked properly yesterday.
>
>Correlated amplitude is less than expected in IF B at all bands.  This
>is likely in the DTS, or the VLA T5 and sampler.  One of Rick's
>very short integration time observations might point to the culprit.
>
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