Barry: I don't have the EMU0202, so I can't say about the 8kHz shift. I do not need to add the 8kHz shift on any of my SDR operations, however.
Regarding the sample rate versus bandwidth, when using 48ks/s, you are actually getting TWO samples at that rate, one of I and one of Q. They each count, so you can end up with a total of 48kHz bandwidth being displayed (plus and minus 24kHz from center frequency). That is, if you have both I and Q working properly. That's how you get 48kHz displayed with a 48ks/s sample rate. >From what I recall (I'm out of town right now), the KX3 I/Q bandwidth is not >much more than 48k or so anyway, so sampling at 96k or higher probably won't >buy you much. But you certainly could try it. Remember that not only do you >have to deal with the KX3 I/Q output bandwidth, but some sound cards roll off >much beyond 48kHz, even if they sample at 96k or 192k. YMMV 73, Terry, WB4JFI Sent from tfox iPad > On Oct 12, 2013, at 9:32 PM, [email protected] wrote: > > Tom, > I, too, am running the EMU0202. first thing you need to do is shft the > receiver 8KHz. That makes the appearance a bit better. I also notice > extraneous garbage on the display. It doesn't seem to interfere with the > overall operation, so I live with it. > > Let me suggest that you not exceed 96 KHz sample bandwidth and then use the > zoom feature to look at less than the sample rate. I haven't thought it > through, but I was taught that you need to sample 2X the bandwidth. How we > are able to use a bandwidth equal to the sample rate is something I really > need to think about. But, I suspect that is contributing to some of the > garbage on the screen. And, Elecraft suggests that you should stay at 48 KHz > due to internal flatness of the radio's response, anyway. > > 73, > Barry > K3NDM > > > ----- Original Message ----- > > From: "Tom" <[email protected]> > To: "Barry LaZar" <[email protected]>, [email protected] > Sent: Saturday, October 12, 2013 7:27:48 PM > Subject: Re: [Elecraft] SDR software for KX3? > > Hi > Well I just bought a new outboard sound card and removed all previous cards. > I'm now running an emu2020 and I can adjust the levels between the channels. > I can minimize the images but as soon as you move up or down a while the > images are back. I also have lots of spurious peaks making it impossible to > distinguish between cw and spurs. There is no adjustment in software for the > inputs but I can adjust the levels on the outside. The images look nowhere > like what you see on YouTube. > Getting pretty frustrated here > Tom > > > > > > > -------- Original message -------- > From: Barry LaZar <[email protected]> > Date: 12/10/2013 17:28 (GMT-05:00) > To: [email protected] > Subject: Re: [Elecraft] SDR software for KX3? > > > Guys, > The one that really works well is NaP3. It was originally set up > for the K3, but the latest iteration does a great job on the KX3. I've > been running with the software for about a year or so, and I now don't > know how function without it. > ______________________________________________________________ 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
