Hi Joe, << very little DSP >> The only way to use "very little DSP" on the 756Pro series is to power the radio down. The DSP *is* the radio. There is no analogue option. http://www.qsl.net/ab4oj/icom/pro_dsp.html Cheers for now, 73, Adam VA7OJ/AB4OJ Scanned for viruses by Blue Coat http://www.WinProxy.com/