[evlatests] ea13 status: revised

[Wes Grammer]

Jerry, Ben Simkin is at the site and is heading over to ea13 in a few 
minutes, to have a look at the K-band RX.

-Wes

On 8/7/2014 3:35 PM, Jerry Langevin wrote:
> The RCP RF plate was replaced in Ant-13 today. The antenna still does 
> not fringe.
>
>
> Jerry
>
> On 8/7/2014 2:32 PM, Eric Chavez wrote:
>> Ken,
>>
>> I was able to look at this problem regarding IFB. I agree it looks like
>> it is the RCP RF plate in the UX. I have informed Terry, and Jerry is on
>> his way to begin this repair. I also opened a maintenance form in
>> mainsaver for tracking.
>>
>> Eric
>>
>>
>> On 8/7/2014 11:14 AM, Ken Sowinski wrote:
>>> On Wed, 6 Aug 2014, Ken Sowinski wrote:
>>>
>>>> All receivers are now installed.  All work except for K band
>>>> which does not fringe at all.  It behaves as if the horn were
>>>> not connected to the sky.
>>>
>>> Allthe high frequency feeds were alignedand braced this morning.
>>> Ka and Q band still look fine.  K band, however is still dead
>>> in the sense of no fringes.
>>>
>>> I pointed the array at the Sun while at K band and ea13 showed
>>> no change inTP while other antennas increased by 20 dB or so.
>>> Is it possible that the feed cover was never removed?
>>>
>>>
>>> Another, independent, problem is that the power into the T304
>>> for IF B, and only IF B, is much to low when setup at K, Ka
>>> and Q bands, but not at Ku band.  In these tests the direct
>>> path was used for both IF pairs at K band and higher.  Looks
>>> like a problem in the T303.
>>>
>>> Ken\
>>>
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