[evlatests] summary

[Vivek Dhawan]

Cross polarized?

Ken Sowinski wrote:
> As Rick reported the L302 dropouts were not seen in 13AC
> after the change in MIB software. If we are all in agreeement
> that the proper fix is in the MIB rather than the FPGA then
> we should upgrade as many of these a we can tomorrow.
> 
> Rob and Jim apparantly took care of the problems engendered
> by the storms of the weekend.  I found only a 10 ns delay
> change for 13A, and a recalcitrant L301-1 in antenna 14.
> Rob said he would remove the L301 this afternoon.
> 
> They poked at 18 much of the afternoon, however I must
> report that it still does not work at all at K band.
> What I know about this is that:
> 1.  It works at Q band
> 2.  At K band what seems to be a reasonable signal gets all
>      the way to the T5.  TP and SD both look reasonable.
> 3.  When the K band NT is disabled the SD goes away.
> 4.  When the antenna moves from 50 degrees to zenith the
>      SD is seen to rise by about the same ratio in antennas
>      13 and 18; thus the receiver appears to be connected
>      to the sky.
> 5.  The subreflector is set to what we were told for K band.
> 
> Help is needed to think of something else to look at.
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