Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-uswest-dot-net>" <sccr4us-at-erols-dot-com> Terry ALL Check the following web site in regards to crest factors, and RMS factors for periodic waveforms http://www.chipcenter-dot-com/TestandMeasurement/c002.html Regards Dave Sharpe, TCBOR Chesterfield, VA.