[evlatests] P-Band

[Claire Chandler]

They may not affect overall power levels but 6.7 GHz coincides with the 
methanol maser frequency and we may have upcoming observations at this 
frequency that would be affected.

Claire

On Thu, 11 Oct 2007, Charles Kutz wrote:

> The P-Band receivers in antenna 11 and 21 have been turned back on.
> These units generate strong C-Band RFI at ~ 6.7GHz in antenna 11 and,
> ~6.7GHZ and ~6.9GHz in antenna 21. We are working on the root cause and
> the solution.
> We are in the process of documenting other observed occurrences in other
> EVLA antennas. These signals are there and may be a nuisance only. These
> "birdies" should not have a large impact on observations since they are
> low enough in power that they do not affect leveling in the T304 and are
> CW signals that appear to be very stable in frequency.
>
> We are working on it.
>
> Chuck
>
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