Per Rick's request I changed the end X PCAL frequency from 4001.3 to 2501.3. I went out of observing from 12:01:46 - 12:08:13 UTC to do this. I accepted the SDF difference from doing this (see attached). I followed his instructions:

On the Cal/PcalX/Excitation MEDM screen

    Take ifo out of observing mode
    Set Sin Ampl to 0.00, hit return (this should ramp down to zero amplitude, hopefully)
    Set frequency to 2501.3 Hz, hit return
    Set Sin Ampl to 40000.0, hit return
    Accept changes in the SDF system
    Set ifo back into observing mode