I'm not assuming anything relative to the P3 and the KX3. I merely echoed the original comment made by KT0NY about the K3/P3 combination versus the more flexible combination of the KX3 and a computer without significant additional complexity.
Dave AB7E On 11/7/2011 2:13 PM, Bill Conkling wrote: > Folks, are you assuming the P3 will plug into the KX3? If so, I think it > will be while until such an adapter is offered. The P3 accepts input from > the IF out connector on the KXV3(a) board. I don't think the KX3 even has > an IF to output. It outputs I/Q signals which are audio level outputs for > direct input into a computer sound card. > > ...bill nr4c > > > > > -----Original Message----- > From: David Gilbert [mailto:[email protected]] > Sent: Monday, November 07, 2011 3:14 PM > To: [email protected] > Subject: Re: [Elecraft] KX3 I/Q SDR questions > > "I have to ask what type of soundcard and computer you are using to > accomplish this? > Also, would you include the total value of your package if I were to > purchase the same?" > > That's kind of like figuring in the cost of your shack, tower, or antennas. > If you already have a decent computer and sound card, the relevant answer > would be zero additional cost since there is some very competent free SDR > software out there and the KX3 isn't going to require anything else except > an inexpensive cable. I'm not sure any of that will be any more difficult > to install than doing P3 and K3 firmware updates. Worst case, if I didn't > already have them, I might factor in the cost of a high end sound card, a > video card with outputs for two monitors, and a second monitor. > > But just for the sake of argument, a dedicated computer with great software > flexibility can be purchased new (or factory refurbished) for less than > $300; a low noise, high dynamic range sound card capable of 192 KHz band > coverage for maybe $120 (see N8LP's list of suggested models); and a > dedicated monitor with much larger size and resolution than the P3 for > around $100. > > To each his own, but I think KT0NY is totally correct and I think Elecraft > has done an admirable thing by including I/Q outputs in the KX3. If the KX3 > turns out to be significantly less susceptible to mushing of multiple low > level in-band signals than the K3, the combination of that and the I/Q > outputs might even be enough to make me sell my K3 and buy a KX3. > > Dave AB7E > > > > On 11/7/2011 12:34 PM, Richard Fjeld wrote: >> I have included Tony's comments below. I agree with paragraph one. >> >> However, in paragraph two I take issue. I am considering the ease and > convenience >> of using a P3. Plus the bandwidth is wider. It is plug and play. No > computer >> issues of hardware, software, and soundcards. >> >> I have used PSDR-IF. I would like to be able to run PSDR-IF, but I am not > alone >> in experiencing mirrored images. Yes, my I& Q signals are balanced. Yet > WinRad and >> HDSDR works with no images. >> >> I have to ask what type of soundcard and computer you are using to > accomplish this? >> Also, would you include the total value of your package if I were to > purchase the same? >> Thank you, >> Richard Fjeld, n0ce >> ______________________________________________________ >> >> I would add to Richard's comment that the KX3 design appears to me to be > an >> ideal implementation of SDR for amateur purposes. I have played around >> quite a bit with SDRs. I've owned 2 Flex radios and have 2 Softrocks, and >> that experience has convinced me that the actual signal detection, DSP >> filtering and processing, etc. should all be done inside the radio, not by >> a general-purpose PC. Today's SDRs are an interesting proof of concept, > but >> as operating ham rigs they have insuperable flaws that result mainly from >> trying to get a PC to do tasks that would be much better done by a >> special-purpose computing system with a suitable OS and tailored data > paths. >> The computerized panadapter is quite neat and I have found it to be even >> more useful than the very useful P3 (I use PSDR-IF, but there are many >> more; see the LP-Pan home page and/or many other SDR pages for samples). >> However, to use it with an analog radio like the K3, you need extra >> gadgetry and complexity in the shack. I'm really looking forward to > getting >> my hands on a KX3. Perhaps after it hits the market, ham rigs will start > to >> provide I-Q output as standard equipment. That would be a step forward for >> ham radio, and another chapter in Elecraft's history of innovations in the >> industry. >> >> 73, >> Tony KT0NY > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
