[Elecraft] 3 technical questions

[Wayne Burdick]

Yes, the IQ stream will be available. On a K4D or K4HD it may be possible to have two IQ streams from different bands. We're still characterizing the available bandwidth.

73,
Wayne
N6KR


> On May 30, 2019, at 2:09 AM, Edward R Cole <kl7uw at acsalaska.net> wrote:
> 
> Wayne, etal:
> 
> I am doing a similar thing with my K3 to view as panadapter.  I use the LP-Pan on 8.215 IF output of my K3 and that goes to the A/D in my Delta44 soundcard to provide a digital stream to sw in my computer.  The 1st IF of the K3 is ahead of the roofing filters so fairly wideband.  The LP-Pan is in fact a SDR which outputs IQ baseband to the soundcard.  So with the K3 it is a single-conversion SDR.
> 
> LP-Pan passes nearly 400-KHz of RF bandwidth which wider than most soundcards.  The Delta44 is 96-KHz wide soundcard.
> 
> Using a special eme sw all signals inside approx 90-KHz wide band are simultaneously decoded and displayed showing virtually all the calling stations.  You could also say it displays as a 90-KHz panadapter.
> 
> This sw has the ability to take two IQ streams so one can use the 1st IF of the subRx in the K3 simultaneously.
> With two antennas orthogonally polarized (Hpol and Vpol) the sw can actually solve for the real polarization angle and maximize the signal.
> 
> So how does this relate to the K4?  I'm guessing the A/D processing the panadpater display might also provide digital IQ output to a computer which could perform similar wideband decoding of digital signals.  I guess the question would be if the IQ stream is available for export.
> 
> 73, Ed - KL7UW
> 
> 
> 
> From: Wayne Burdick <n6kr at elecraft.com>
> To: Bill Frantz <frantz at pwpconsult.com>
> Cc: Elecraft Reflector <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] 3 technical questions
> Message-ID: <E2C2F138-524B-4B2D-9AF3-8A3CE4F988B4 at elecraft.com>
> Content-Type: text/plain; charset=us-ascii
> 
> The K4 is always doing direct sampling for panadapter purposes.
> 
> If the HDR module is turned off or is not present, the K4 also does direct sampling for demodulation.
> 
> If the HDR module is turned on, two additional ADCs are used, right at the outputs of the crystal filters (oversimplifying a bit). The original two ADCs are still being used for the panadapter.
> 
> Wayne
> N6KR
> 
> 
> 73, Ed - KL7UW
>  http://www.kl7uw.com
> Dubus-NA Business mail:
>  dubususa at gmail.com 
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