BTW, cocoaModem and MLDX both have help on their websites. The cocoaModem help files on Kok Chen's website (Google cocoaModem) tells you about everything you need to know about digital. It's very well done. Rick - K6LE On 12/26/2009, at 9:12 , Robert Klein wrote: >>>> Neither program has built-in Help and the manuals are not at all clear.