Here is a link showing the schematic with the SA612 being used to downconvert the incoming IF frequency to a bandpass that is within the range of the sound cards bandpass. In this case it is 12khz which is all that is require for DRM reception. Of course the crystal frequency would have to be adjusted to match the IF of the receiver's IF plus 196khz.
http://www.spetzler.dk/bjarke/Projects/DRM/DRM.htm http://www.spetzler.dk/bjarke/Projects/DRM/mischerschaltung.png http://www.spetzler.dk/bjarke/Projects/DRM/mix-sch.jpg --- In [email protected], "Jose A. Amador" <[EMAIL PROTECTED]> wrote: > > > I see no reason that impedes it. But you should sample at 192 kHz, as > you need at least two samples per cycle, and the lowest standard > sampling frequency that allows it is 192 kHz. 96 kHz and any lower fall > short of the at least two samples per cycle requirement, if you consider > that the upped sideband of any received mode on the IF is on a higher > frequency than 48 kHz. > > 73, > > Jose, CO2JA > > -- > > ke8bg wrote: > > > Is there any reason that I cannot use a modified WinDRM IF adapter > > tapped into the IF of a scanner or 2 meter radio to convert down to > > 48khz IF for muliti-mode reception using the soft_radio software? > > > > Duane / KE8BG in Denton NC >
