[evlatests] 3-bit sampler status

Ken Sowinski ksowinsk at nrao.edu
Fri Mar 2 16:30:16 EST 2012


On Fri, 2 Mar 2012, Ken Sowinski wrote:

> 4.  Problems noted related to the BD (D302, D304) samplers.
> -  ea17-D2 has too little power fed to the sampler.
>    D1 is OK, so likely culprits are T304, wiring, or D304.
> -  ea21-B2/D2 have too little power; B1/D1 are OK.
> -  ea23-D2 attenuator monitor point is stuck at 31.  There
>    might be other modules with this problem in a channel 2
>    output; this is the only one that I verified.

In the clear after-lunch light none of these problems
were seen.  One problem not noticed this morning is
that the power meter for ch2 of ea17-B reads +37 dBm.
Keith promises to fix that next week.




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