ates whether the signal is scrambled on input or
          on output as follows:
          = 'N':  the signal is not scrambled at all;
          = 'I':  the input signal is bit-reversed;
          = 'O':  the output transform is bit-reversed.

  WGHT    CHARACTER*1
          Indicates whether the precomputed weights are available
          or not, as follows:
          = 'A':  available;
          = 'N':  not available.
          Note that if N &gt; 1 and WGHT = 'N' on entry, then WGHT is
          set to '