At 01:45 PM 10/23/2002, media.nai at rcn.com wrote: >dBu is dB referenced such that .775V into 600 Ohm is 1 mW, and Decibels are >logarithmic so > >dBu = 20 log (Vrms/0.7746) and > >Vrms = .707Vpk (Vpk = Vp-p/2) I don't believe this is quite correct. What you are describing is dBm, not dBu. Just remember that the "m" refers to a "m"illiwatt (into 600 Ohms). Ian