Bob, I tried out your Analyzer for BARTG. Lots of really great info produced. However, FWIW, in both the Calc worksheets, the 'QSY Error' calculation in Column L seems to be incorrect.... the formula for the 5 minute test is written with <TIME(5,0,0) and I think it needs to be using <TIME(0,5,0) 73, TNX for a great tool, Ben - WB2RHM