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    User name V. Sulkosky

    Log entry time 12:02:19 on February21,2011

    Entry number 347953

    This entry is a followup to: 347852

    keyword=S2m-13R ADC HV Check

    LHRS S2m channel 13R (index from 0). Figure 1 shows the ADC spectrum
    with HV and Figure 2 shows the ADC with HV. Clearly the pedestal is
    noisy with or without HV. The RMS changes by about 6 channels, but
    there is real signal under the huge pedestal. During the next access,
    we should check the cable connections and if needed change patch panel

    FIGURE 1

    FIGURE 2