Description of SN files
 =======================

 1. SN_MTF1.txt, SN_MTF2.txt => Files of chamber electronics serial
   numbers.   Files have 1 line of data per chamber, a tab separated list
   of data as follows:

   CHAMBER ATLAS_ID CSM_MB_ID CSM_ID DCSnode NikHef_ID DCS_ID
     where 
     CHAMBER   = chamber name, e.g. eml1a01
     ATLAS_ID  = ATLAS serial number e.g.
     CSM_MB_ID = CSM Motherboard ID
     CSM_ID    = CSM ID
     DCSnode   = DCS node number
     NikHef    = Nikhef DCS board ID
     DCS_ID    = DCS box serial number    


  2.  SN_MTF_FINAL1.txt => Files with "final" chamber electronics
    serial numbers. SN_MTF_FINAL1.txt contains only data from EIL4,
    EML, and EMS chambers which are ready for installation and whose
    numbers are not expected to change anymore.  EI, and EO chambers
    will be handled by later "SN_MTF_FINAL" files as they are readied.

    Files have 1 line of data per chamber, a tab separated list of
    data.  The format is the same as above, with the addition of a
    FLAG which indicates which (if any) of the ID numbers has changed
    relative to the earlier files.  All chambers of a given type are
    listed with the FLAG indicating which of the ID numbers has
    changed relative to the earlier files.

    Format:
    CHAMBER CSM_MB_ID CSM_ID DCSnode NikHef_ID DCS_ID FLAG
   
    FLAG values:   NEW     => chamber not in previous MTF files
                   MB      => CSM MB changed
                   CMS     => CSM ID changed
                   DCSNODE => DCS node number changed
                   NIKID   => Nikhef ID changed
                   DCSID   => DCS ID changed
                   ""      => (no flag) data unchanged

    Multiple flags can be set if multiple items have been changed.