> ftp://ftp.cmf.nrl.navy.mil/pub/chas/afs/rxtrace2xplot.pl Thanks. As xplot was not available as portage I tried xplot->gnuplot. Don't do that. The xplot graphics shows much better what is going on than the converted gnuplot. I used xplot 0.90.7.1 from http://www.xplot.org/. Harald.