This is a demo video clip I made of receiving amateur radio PSK 31 transmissions on the amateur radio 40 meter band on 7.035 Mhz using a free software package called "Ham Radio Deluxe". I down loaded the software from www.ham-radio-deluxe.com. In this demo, I fed the receiver audio from my Grundig Satellit 800 receiver line output to the mic input jack on my Compaq laptop computer. For more info about the PSK 31 mode, go to http E-mail address is: ki7f@yahoo.com Home website:http:www.ki7f.com