I was thinking it would be nice to have both, 0 IF when you want to see 48Khz of bandwidth but once you've 'locked in' on a signal you want, go to a low IF to get a gain in performance by getting away from all the trash and other problems at 0 IF ...
This would mostly be a software thing and for that I have to work with what others have done, my experience with DSP consists of playing around with the EMU chip in the Live! soundcards JR --- In [email protected], Frank <[EMAIL PROTECTED]> wrote: > > >Got it > >That means I don't have to offset my VFO which simplifies > >things considerably ... no more than I use DRM, I can just figure the > >offset in my head on the rare occasion I use that mode > > Jr_dakota, > There are some advantages to still keeping a very low IF in your design: > DC errors, capacitive coupling, leakage of an local oscillator into the > RF input stage which could end up saturating some analog stages into the > +- suplly rails. > > I just wanted to add that P-T implied by treating the signal as a > passband is that you can sample at various rates independent of the > starting and stopping frequencies but dependent on the difference of the > stopping and starting frequencies. A low IF design is a good opportunity > for you to check up on undersampling and "near zero IF". Don't forget > that the main problem of higher processing in these designs is not at > all significant for your CPU. > Frank > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
