[evlatests] state of antennas and correlator

[Rob Long]

Antenna 6 doesn't appear to have any 'obvious' electronics problems.  It 
looks like we have correct LO and sync to the antenna.  Is it possible 
we have FRM problem?

Rob

Ken Sowinski wrote:
> Rob has announced that all the 'operational' antennas ought
> to work.  Micahelk and I made a survey of antennas at L, C
> and X bands using IFs A and C to see where more work is needed.
> 
> The short summary is that only ea06 does not work.  We still
> don't know whether to blame the antenna or the correlator,
> but the antenna seems more likely.
> 
> Problems manifest at all bands.
> - 5B and 9B have broken sampler or deformatter.
> - 16B has a dead'ish T304.  The MIB responds, but reports zeros
>    for all monitor points.
> 
> ea11 and ea26 do not work at X band.
> ea13 does not work at C band.
> ea06, ea20 and ea26 do not work at L band.
> 
> Fringes
> After taking into account the above known problems the following
> antennas or IFs do not fringe.
> - ea06 does not work at all
> - ea14 IF A does not fringe
> - ea18 did not fringe at X band only
> - ea25 IF A and ea26 IF C produced no correlator output.  Data
>    invalid was asserted in the delay module
> - ea27 IF C does not work and no data is coming from the deformatter
> 
> 
> More careful checks of antenna response await getting data into
> and SDM so that it can be looked at with more sophisticated tools.
> 
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