On Mon, Nov 7, 2011 at 3:32 PM, Richard Fjeld <[email protected]>wrote:
> ...I have been trying to run PSDR-IF on an HP with a P4 at 3 GHz. with a > 96 > KHz SoundBlaster card. The image problem makes it unusable. Yet WinRad > displays fine.... ======== Hi Richard, Yeah, I can believe that. PSDR is buggy software. There's a saying in computer science that as time goes to infinity, the number of bugs goes to one. In the case of PSDR, that may be overly optimistic. My post was not meant to be a recommendation of PSDR, but rather to reflect on the differences between a dedicated SDR, an analog radio with outboard IQ circuitry feeding a panadapter, and the KX3 design which does the detection and filtering in on-board computing gizmos and then hands off the IQ for those who like a PC-based panadapter. On the topic of images: PSDR is supposed to tune out its on-screen image, and this actually has worked for me. To make it work, you need to feed it a steady S9+ carrier offset from the center frequency. It can help to tweak the relative channel amplitudes while watching the image amplitude; on my laptop I use an EMU 0202 sound card, which has knobs for this purpose. My desktop has a built-in 192K sampling sound card, and its control software has a slider. However, this is a side issue relative to my original point, which is that I'm betting that the KX3 design will be very influential in the future of ham rigs, and will spell the end of the knobless SDRs we see today, which I believe are a dead-end diversion in the evolution of ham radio. 73 Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 ______________________________________________________________ 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
