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

Rob Long rlong at nrao.edu
Wed Feb 1 16:07:18 EST 2012


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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