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    User name mercado

    Log entry time 16:38:34 on May14,2010

    Entry number 322535

    keyword=Redid pulse test with longer BNC cable

    
    After installing the long (20 foot) Twinax cable, the time constant went way 
    down but we started seeing a bump at the beginning of the pulse and a dip at 
    the end.
    
    I changed the short (1 foot) BNC cable that went from the PMT to the converter 
    box to a 6 foot BNC cable. 
    
    The result of this test (run 3854) is shown below.
    


    FIGURE 1