Hi Ed, The centre dot on the COMP meter scale (IC-746Pro User Manual, p. 58) represents approx. 5 dB compression, and the right-hand dot approx. 10 dB. Best 73, Adam, VA7OJ/AB4OJ North Vancouver, BC, Canada http://www.ab4oj.com/ Scanned for viruses by Blue Coat http://www.WinProxy.com/