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    User name Moffit

    Log entry time 11:45:58 on August29,2005

    Entry number 153747

    keyword=Access activity, det1 pedestal noise

    During the access, played with some the cabling arrangement for detector 1 
    (plugged into adc27_0).
    
    I determined that the pedestal noise was not the result of the cavity monitor 
    signals, readout in the same crate.
    
    The main source of the noise appeared to be from the fact that the signal cable 
    was coiled up.  I uncoiled it, and it reduced from RMS of 20 channels down to 
    12 channels.
    
    Also appears that we pick up an additional 2 channels of RMS by using the 
    switch.  So... at present... we have about 13-14 channels of noise on the 
    detector 1 signal.
    
    Looks like the pedestal also changed by 281 channels (which may or may not have 
    been from the reduction of pedestal noise).
    
    Like before... I have changed the pedestal in the database file.
    


    FIGURE 1