[evlatests] 4-band Status

Charles Kutz ckutz at nrao.edu
Wed Aug 15 17:34:07 EDT 2007


Antenna 17's and 26's 4-Band polarizations have been swapped in the 
antenna. They should be correct now.

Chuck

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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