[evlatests] P-band status ...

[Rick Perley]

    Paul (et al.):

Paul Harden wrote:
> On 11/14/2013 5:29 PM, Rick Perley wrote:
>   
>>      We took some data at noon, mostly for 'flux density' transfer tests.
>>
>>      Array status:
>>
>>      No fringes:  ea17 on both polarizations, ea25 on 'L'.
>>
>>      Swapped polarization:  ea11
>>     
> All polarizations were correct 2-3 weeks ago.  We'll check this one, as 
> there has been some work done on this antenna.
>   
    The cross-polarization on this antenna is also very high.  It's 
definitely cross-polarized. 
> Was there proper power levels from EA9, 11 and 16?
> Local tests indicate YLP/RCP might be anemic on these three.
>   
    Ken's script set the input powers at the right levels.  I can tell 
the antenna performance from the subsequent correlated power gain 
solutions (all expressed in power units):
           ea04R        low by factor of 1.5
               18R        low by factor of 3
           ea09R        low by a factor of 16 (!)
           ea11R        low by a factor of 2
           ea16R        low by a factor of 9

    All the others are very good -- variations are less than 5% (!!!!)

   
>   
>>      There is no switched power on:  ea10, 11, 13, and 25.  ea02'L' has
>> very weak and variable PDifs.  All others look pretty good.
>>     
>
> The Tcal and CAL switching on these antennas are being addressed.  These 
> have the initial prototype circuit boards and will be replaced with the 
> production version boards shortly.
>
>   
>>      The quality of the visibility data is excellent.  More on this tomorrow.
>>     
>
> Always appreciate the feedback on P-band.
>
> Paul
>
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