Wayne, Thank you for resolving an old issue that arose when I first explained my dual-polarity diversity receiver for eme. Critical for this is that the two K3 receivers are freq. locked (have zero offset). I am modifying my two LP-Pan to run off a single xtal oscillator so they will be phase-locked, as well. The LP-Pan xosc runs at 32.836 MHz (4x the K3 IF) as sampling clock for the LP-Pan SDR. I will run 96-KHz bw for diversity reception on 144-MHz. Full details: http://www.kl7uw.com/LINRAD.htm
I have been informed that my new dual-receive 2m transverter was shipped, yesterday from DEMI. That was the last remaining piece of the system. I will still have a lot of testing and sw settings to work out for the system to be QRV, but getting closer. Eventually, the DEMI transverter will have a PLL using an ext. reference like the K3. 73, Ed - KL7UW ------------------------------ Message: 33 Date: Tue, 22 Mar 2011 19:37:54 -0700 From: Wayne Burdick <[email protected]> Subject: Re: [Elecraft] K3 freq. stability question? To: [email protected] Cc: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes All signal sources are phase locked to this reference, Mike. The other factor is synth DDS resolution, which is about 1/5th Hz, and can lead to about a +/- 1 Hz error, worst case, during operation. However, in diversity mode, both synths are set to the same DDS digital word, so there's zero offset. (This is not true of some other radios claiming to do diversity.) 73, Wayne N6KR 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep [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
