http://elecraft.85.s1.nabble.com/KX3-I-Q-SDR-questions-tp6960402p6972209.html
I'm not assuming anything relative to the P3 and the KX3. I merely
> 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:
[hidden email]]
> Sent: Monday, November 07, 2011 3:14 PM
> To:
[hidden email]
> 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
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