TJAN24

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    Comparing version 12:44, 12 Feb 2020 by jwagner with version 12:48, 12 Feb 2020 by jwagner.

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    • Fringe test between PV and NOEMA at 3mm
    • Done with the EHT setup 4x2GHz dual-pol
    • PV with 2-of-4 x R2DBE and 1 x DBBC3; on sky demonstration of DBBC3 GMVA fringes
    • PV had poor IF bandpass equalization, and NOEMA had low optical power in parts of Rx LSB
    • Fringe SNR drops notably from b1&b2 (good SNR) to b3&4 (low SNR). Same behaviour in e20j23 but with opposite backend assignment at PV rules out backend issues. Haystack is still to correlate e20j23 NOEMA data with rest of Jan 2020 DR stations (except for PV), remains to be seen if a NOEMA issue, or PV.

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    Version from 12:44, 12 Feb 2020

    This revision modified by jwagner (Ban)

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    Version as of 12:48, 12 Feb 2020

    This revision modified by jwagner (Ban)

    ...

    • Fringe test between PV and NOEMA at 3mm
    • Done with the EHT setup 4x2GHz dual-pol
    • PV with 2-of-4 x R2DBE and 1 x DBBC3; on sky demonstration of DBBC3 GMVA fringes
    • PV had poor IF bandpass equalization, and NOEMA had low optical power in parts of Rx LSB
    • Fringe SNR drops notably from b1&b2 (good SNR) to b3&4 (low SNR). Same behaviour in e20j23 but with opposite backend assignment at PV rules out backend issues. Haystack is still to correlate e20j23 NOEMA data with rest of Jan 2020 DR stations (except for PV), remains to be seen if a NOEMA issue, or PV.

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