Thanks to all those that have replied to my query - it seems a simple concept, and the Wikipedia article just confused me. And thanks for that PDF link Grant - the four-modulus counter looks frightening though - I'll have to sit down with a cold towel round my head to think about that one :-)
Peter _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts