[evlatests] Zero PDif antennas

[Pedro Beaklini]

Hi Rick,

EA09: It looks like the WO-23563 (please see the last stress test - Dec 19).
But it is IFA U to Q, except by X, which is IFB

EA12 is WO-23663 (see the array status email yesterday)
But it only affects IFC at X and higher (on C-band is IFC and IFD).

Could you please confirm your IF report? On the fringe screen, the IF identification of zeros of TCAL0004 looks compatible with what I described above

Cheers

Pedro

On Dec 20, 2024, at 10:07 AM, Rick Perley via evlatests <evlatests at listmgr.nrao.edu> wrote:

I took some data, in 8-bit mode, at X, Ku, K, Ka, and Q bands, to check some flux density issues.

Two antennas have 'zero PDif' troubles — PSum looks good, but 'PDif' are just zero-centered noise.

ea09 in RCP:  Ku-band in IF 'A', and
                             X, K, Ka, and Q in IF 'B'.

ea12 in LCP:  X and Ku bands in IF 'C'.  (PDif is very weak at K-band, looks good in Ka and Q bands)
                            K, Ka, and Q bands in IF 'D'.



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