Finally! Someone actually gave me an answer.
Thank you. 73, Dave AB7E On 2/24/2011 10:44 AM, Joe Subich, W4TV wrote: > >> They obviously didn't include it, though, and in spite of several >> public and private queries from me regarding the reason for that >> omission I never got a single answer. > > Examination of the P3 data would suggest that I/Q do not exist > except in the digital domain. I highly doubt that the hardware > has sufficient I/O to support the add-in DAC necessary to provide > analog I/Q for an external sound card. > >> (the other reason is that there is no capability to display the 2nd >> receiver even if I hardware hack the K3 to bring out the 2nd IF) > > That's incorrect. All you need to do is provide an IF signal from > the KRX3 instead of the main receiver. Th P3 will happily display > that signal although the VFO A/VFO B controls will be reversed. I > don't think it would take a whole lot for Al to add an "A/B" function > although I'm certain it is *way* down the priority list. > >> Anyone who wants to run CW Skimmer or any other third party SDR >> software will have to buy another piece of hardware to do it, when >> the P3 could have easily provided that capability. > > It is far from "easy" or cheap to provide that capability. Given > the structure of the P3 the necessary independent I/Q signals are > not preset ... the only accessible I/Q are based on the selected > display width and are locked to the display's center frequency. > To provide the support you seek would take a second AD6620, a > second control interface from the dsPIC, DAC and audio drivers > - none of which are available in the P3. The cost of the "add on" > to drive a separate sound card for CW Skimmer would be substantially > more than the LP-Pan hardware and provide no additional benefit. > > 73, > > ... Joe, W4TV > > > On 2/24/2011 12:06 PM, David Gilbert wrote: >> >> Don't hold your breath waiting for that. I lobbied long and hard for >> that capability (buffered IQ outputs) from the very beginning ... >> starting back when Elecraft first announced they would be introducing >> the P3. They obviously didn't include it, though, and in spite of >> several public and private queries from me regarding the reason for >> that omission I never got a single answer. The lack of IQ outputs is >> the single biggest reason why I will not buy a P3 (the other reason is >> that there is no capability to display the 2nd receiver even if I >> hardware hack the K3 to bring out the 2nd IF). Anyone who wants to run >> CW Skimmer or any other third party SDR software will have to buy >> another piece of hardware to do it, when the P3 could have easily >> provided that capability. >> >> 73, >> Dave AB7E >> >> >> >> On 2/23/2011 6:03 PM, Igor Kosvin wrote: >>> I just assembled P3 two days ago. One of the things I would like to >>> see is >>> the IQ output of the P3. The signals are definitely generated in P3 >>> and I >>> would guess it is just the matter of buffer and connector. With these >>> signals and decent sound card one can play with PSDR software (open >>> source >>> BTW) or number of other similar programs and even run skimmer for >>> the RBN. >>> How cool is that? >>> 73, >>> Igor, N1YX >>> >>> -----Original Message----- >>> From: [email protected] >>> [mailto:[email protected]] On Behalf Of Bill >>> Sent: Wednesday, February 23, 2011 5:13 PM >>> To: [email protected] >>> Subject: [Elecraft] P3, what lies ahead? >>> >>> >>> Has anyone figured out the possible purpose of those unused holes in >>> the P3 >>> backpanel? >>> >>> One of them labeled "sensor" ??? >>> >>> 73, K3UJ >>> ______________________________________________________________ >>> 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 >>> >> ______________________________________________________________ >> 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
