[evlatests] K-band

[Rick Perley]

    I checked the L-band data from last night.  Antennas which are poor 
in SNR, by a factor of ~2 or worse are: 

    ea21 gives poor SNR in IFs A and C (but normal in B and D)
    va12 gives poor SNR in IFs C and D (and has a high Tsys to match). 

   

Ken Sowinski wrote:
> On Tue, 15 Jul 2008, Ken Sowinski wrote:
>
>   
>> On Tue, 15 Jul 2008, Rob Long wrote:
>>
>>     
>>> The EVLA antennas appear to be working at K-band (as far as the
>>> hardware), but several of the B and D RMS levels are high.
>>>
>>> With so many antennas not fringing, I don't believe this is an antenna
>>> hardware issue.
>>>       
>> The array is observing in K band right now, about 23.5 GHz.
>> There are a number of antennas with weak fringe response.
>> the problem is not shadowing.  It does seem that the worst
>> of the EVLA antennas have high system temperatures; I cannot
>> easily examine the VLA antennas.
>>     
>
> There are several receivers that appear to have high T_sys
> and poor G/T.
>
> K  ea01, ea05, ea11, ea25
> X  ea25
> C  ea19, ea24   (Rick has reported these)
>
> There was nothing alrming at Q band; L band was not examined.
>
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