[evlatests] Switched power failure, ea14, X-band

Vivek Dhawan vdhawan at nrao.edu
Mon Nov 5 18:18:39 EST 2018


The noise diode on ea14 X band is dead. The LNAs are good, Tsys
is 30K-ish and data are fine. Front end will it replace when a
spare is ready.

On Mon, November 5, 2018 15:23, Rick Perley wrote:
|      I'm analyzing data from a science/calibration run, taken last
| Friday.  The bands observed were X, Ku, K, Ka, and Q.  A single failure
| in switched power is seen:
|
|        *  ea14 at X-band has no detectable 'PDif' -- only random noise
| in the level of a few millicounts is seen.
|
|      All other antennas are fine at the observed bands.  (Antennas 13,
| 19 and 26 were out).
|
|
|
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