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 <[email protected]> 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 <[email protected]> > To: Bill Frantz <[email protected]> > Cc: Elecraft Reflector <[email protected]> > Subject: Re: [Elecraft] 3 technical questions > Message-ID: <[email protected]> > 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: > [email protected] > ______________________________________________________________ > 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
