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    User name jpchen/X. Zheng

    Log entry time 10:30:40 on June25,2001

    Entry number 64537

    keyword=EPR

    9:04 turned off lasers #4 and 7.

    EPR measurements:
    I did the 1st sweep while Xiaochao was helping (adjusting gains), it failed.
    Xiaochao did the 2nd sweep, while adjusting abs and rel gains up,
    also failed.

    After waiting for about 10 minutes, Xiaochao did the 3rd sweep,
    adjusted both gains lower (to about 1-2 turns). It worked fine.

    Here are the results from the third sweep:

    1st order:
    Freq, error, pol., error
    down: -40.50 1.83 -33.64 1.52
    up: 42.43 1.81 35.24 1.50

    0th order:
    down: -41.17 1.79 -34.20 1.48
    up: 41.09 1.76 34.13 1.46

    We probably lost some polarization due to the sweeps.
    Each sweep causes loss of atleast 1% (relative). So the polazation
    before the measurement should be > 35.5%.