Hello Joe, thanks for the link! Actually I wanted to send that message to Leif, but somehow mixed up the addresses so it went to the list :-) 73, Marko S57UUU On Monday 18 October 2004 08:46, Joe Fitzgerald wrote: > Marko > > Try http://focus.ti.com/lit/an/sbfa001a/sbfa001a.pdf > > -Joe KM1PLINRADDARNIL