[evlatests] Noise Diode in ea01 at Q-band in LCP

[Chuck Kutz]

Is antenna 1 being moved into the barn tomorrow?

Chuck

-----Original Message-----
From: evlatests-bounces at nrao.edu [mailto:evlatests-bounces at nrao.edu] On
Behalf Of Rob Long
Sent: Wednesday, February 01, 2012 2:09 PM
To: Rob Long
Cc: evlatests at aoc.nrao.edu
Subject: Re: [evlatests] Noise Diode in ea01 at Q-band in LCP

Looks like K-band (T303) is fine on antenna 1. It appears that Q-band LCP
has a problem.

Rob

Rob Long wrote:
> It looks like LCP side of Q-band doesn't have any signal! I am trying 
> to run K-band now to make sure it isn't a T303.
> 
> Rob
> 
> Rick Perley wrote:
>>     The switched power from ea01 at Q-band in LCP is extremely weak, 
>> especially at the high frequency end.  At 48 GHz,  we are seeing only
>> .006 counts -- about 5% of the other IFs.  At 42 GHz, it is about 10% 
>> of normal.  At the same time, the summed power is also too low -- 
>> about 1/5 of the other antennas.  This shouldn't happen, unless the 
>> T304 attenuators are set to the lowest values possible.  Something is 
>> not right here ...
>>
>>
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