SONChanInterleave

  SONCHANINTERLEAVE Returns the channel interleave factor for ADCMark channels
  in SON V6 or above
  INTERLEAVE=SONCHANINTERLEAVE(FH, CHAN)
                          FH SON File Handle
                          Chan Channel number

  Author:Malcolm Lidierth
  Matlab SON library:
  Copyright © The Author & King's College London 2005-2006