Thank you, John, for posting this. (see below) I was going to comment that articles I have read say the software adjusts the phase of the I/Q signals in the soundcard to cancel images. You have said it well. WinRad & HDSDR, perhaps others, are doing it well. It seems to be a weak spot with PSDR-IF related software.
Thaks for sharing the Infrasonic related info. Dick, n0ce _________________________________ The Infrasonic Quartet card (stereo, 192 kHz) comes with a small applet, called "FREEMIXER Panel," that works outside of the WIN sound management system. This helper app allows one to independently play with the levels (not the phase) of the incoming I/Q stream. I imagine other fast cards come the same way. Several of the SDR programs also have an "image killer" available. I am guessing when I say that this "image killer" works by adjusting the phase (time delay)...the ones I have used are offset-specific WRT the particular image that is removed. John Ragle -- W1ZI _____________________________ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
