[evlatests] ea16 status

[Wes Grammer]

Bryan, we had planned to have a look at them yesterday, but ended up 
spending almost the whole day at 16. We have a large crew going out 
today, and will check out 5 & 10. I'm pretty sure there's probably still 
water in the feed.

-Wes

On 7/15/2014 3:54 PM, Bryan Butler wrote:
>
> did you have a chance to look at 5 & 10?  it may be that it rained 
> after they were drained yesterday, because they both are not working 
> at X-band.
>
>     -bryan
>
>
> Wes Grammer wrote, On 7/15/14 14:43 :
>> A quick, real-time update on ea16 receiver status:
>>
>> 1. L-band output cables have been swapped, to correct the polarization
>> problem.
>>
>> 2. We've been unable to cool the S-band RX since ea16 went online last
>> week. Cryo is here right now, checking the vacuum distribution system
>> for leaks - there wasn't an obvious problem with the receiver itself.
>>
>> 3. The X-band feed did have a substantial amount of water inside. We
>> dropped the receiver and radome cover to drain and dry it out. Before we
>> leave, we'll reseal it and verify the dry air system is working.
>>
>> At this point, all 7 other cryogenic receivers are cold and appear to be
>> functioning normally.
>>
>> -Wes
>>
>>
>> On 7/15/2014 11:15 AM, Ken Sowinski wrote:
>>> On Mon, 14 Jul 2014, Ken Sowinski wrote:
>>>
>>>> a16 is on the master pad and is beginning to work.
>>>>
>>>> Current problems:
>>>> 1.  L band ploarizatios are swapped
>>>> 2.  S band fringes are weak; perhaps the rx is warm.
>>>> 3.  No fringes at X band; more water?
>>>>
>>>> A pointing run is needed.  That can be doen at C band tongiht if
>>>> the antenna is still working at the end of the day.
>>> Tilt for ea16 was determined from the pointing run of last night,
>>> so the antenna may be moved whenever desired.
>>>
>>> I have not yet verified that any of the problems listed above have
>>> been remedied.
>>>
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>>
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>