Command: SET/FILTER     These commands add or remove DX filtering from
         SET/NOFILTER   your filter record.  The keyword "ALL" can be used
                        to specify all bands or all prefixes. "Mode" is 
                        either CW or SSB.  Valid bands are 160, 80, 40, 30,
                        20, 17, 15, 12, 10, 6, and 2.
              Syntax:   SEt/FILTER/mode/BAND=(x,x,x,...) prefix(es)