>Personally I feel the words "high quality" may overstate it. >Traditionally there has been a trade-off between bandwidth and >quality, the less bandwidth the worse the quality. > >But it's free and costs nothing to try so I'm downloading my copy >and if it comes anywhere close to the quality of a 2.4 kHz SSB >transmission then I'll be more than happy
I have made some tests with FDMDV. Spectrum analyzer display showing the 1.143 kHz occupied bandwidth http://home.roadrunner.com/~mdmiller7/images/dv/fdmdv/vdmdv.jpg Spectrum analyzer display showing 3 of the 15 carriers. The markers (aquamarine and purple) are spaced 75 Hz apart http://home.roadrunner.com/~mdmiller7/images/dv/fdmdv/fdmdv1.jpg Base band audio http://home.roadrunner.com/~mdmiller7/images/dv/fdmdv/baseband.mp3 Audio http://home.roadrunner.com/~mdmiller7/images/dv/fdmdv/audio.mp3 Not too bad for such a narrow bandwidth! 73, Mark N5RFX
