[evlatests] Ant 13

[Rob Long]

IF-A seems to have some TP, but I just noticed that the T304-A levels 
are set at '0' so we may just be seeing noise.

Rob

Ken Sowinski wrote:
> On Thu, 26 Jul 2007, Rob Long wrote:
> 
>> Ant 13 appears to need it's T304-B attenuator values reset for Q-band.
>> I'm not sure why, but IF-B seems to need much less attenuation (like
>> input=3 and output=7).  I'm not sure what criteria is used to determine
>> the proper levels on the B/D downconverters, but B is not working at 
>> Q-band.
> 
> I think the problem is a little deeper.  I asked Tom
> to write up antenna 13 because there is no TP for IFs
> AB at both K and Q bands.
> 
> At K band there is not enough power to the sampler even
> with the attenuators wide open.  Q band is hotter and
> can just be made to work by adjusting the the attenuators.
> I suspect a problem in the UX converter.
> 
> Ken