[evlatests] 4-band Status

[Brigette Hesman]

We managed to get a test in yesterday on the 4-band and my results  
show that the swap you did has fixed the problem.  I will do further  
tests once the other antennas have been done.

Brigette
On Aug 14, 2007, at 3:29 PM, Charles Kutz wrote:

>
> Antenna 11's 4-Band polarization was swapped today (Tuesday, 14th).
> We will swap antenna 17's and antenna 26's 4-band polarization  
> tomorrow
> during maintenance visits to the antennas.
>
> Chuck
>
>
>
> Rick Perley wrote:
>>     Things are much improved now.  Ken squashed some buglets, and the
>> observations just made clearly show the following:
>>
>>     1) Antennas 7 and 12 give no fringes at all.
>>
>>     2) Antenna 24 is completely messed up -- huge and false  
>> amplitudes,
>> or noise, or both.
>>
>>     3) Antennas 11, 17, and 26 have their polarizations reversed.
>> Please interchange the R and L cables.
>>
>>     4) Antenna 18 gives barely visible fringes.
>>
>>     5) Antenna 21 gives no fringes on the A,C (IF#1) side.
>>
>>     6) The fringe amplitudes for antennas 11 and 19 are very low.
>>
>>
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>
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************************************************

Dr. Brigette Hesman
EVLA
Array Operations Center
NRAO	
Socorro, NM 87801
bhesman at aoc.nrao.edu
Phone: (505) 835 7491

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