Yes, you're right, Diodes make the same, too. :-) I was asking because normally this kind of mixers use twice receiving frequency for downsampling to Baseband. But the DDS goes only up to 37 MHz. So do you use undersampling with the RX (single balanced mixer, I would call it "even harmonic reception") ? If so, is - for example - DRM reception be affected by the loss of information? This is the reason why I asked for the bandpasses, too. Here in europe we have a lot of strong signals on the air and it's important to use good bandpasses in these kind of designs to get the harmonics out ( 2x, 3x, 4x ... in single balanced mixers, 3x, 5x in double balanced mixers) of the receiving chain. Stephan
_____ Von: [email protected] [mailto:[email protected]] Im Auftrag von ni9n Gesendet: Sonntag, 24. Januar 2010 11:23 An: [email protected] Betreff: [soft_radio] Re: LD-1 Discussion on Garage-shoppe.com Blog Hi, Stephan! Yes, it uses a Tayloe detector, and the preselector filters are all third order. It's my understaniding that even the classic diode-ring mixers are really switching mixers, because the diodes in effect hard-limit the LO. In the frequency domain, using a Tayloe detector (or any switching mixer) sacrifices nothing as long as the sampling images are filtered out downstream. --- In soft_ra...@yahoogro <mailto:soft_radio%40yahoogroups.com> ups.com, "Stephan Schaa" <sc...@...> wrote: > > Hello ni9n! > > I've a question about your receiver: Do you use a kind of Swichting Mixer, > sometimes called Tayloe Detector? Or ist it classic single or dual > conversion? It would be interesting if you would post some more information > about the bandpasses like which order they are. > > 73, Stephan
