Since the two receivers in the K3 are identical and use the same frequency reference, I presume that when they are tuned to exactly the same frequency the IF outputs should be phase-coherent (with an unknown but constant phase offset). Anybody know if that's correct?
Al N1AL On Sun, 2007-12-30 at 17:52, Rick Kunath wrote: > Alan Bloom wrote: > > As I recall, signals at VHF/UHF tend to become horizontally polarized > > after propagating long distances, no matter what the polarization of the > > transmit antenna. That's why horizontal polarization is traditionally > > used for SSB/CW (DX-oriented communications) and vertical for FM (mostly > > local communications). > > Exceptionally interesting thread... > > K1JT (of WSJT fame) has been doing some experimenting with dual > polarization reception using two identical setups, preamps, receivers, > etc, connected to horizontal and vertically polarized antennas. Each > receiver requires a separate baseband feed to Linrad to decode (4 > channels) that is then fed to a second computer over a dedicated > Ethernet crossover cable which is running MAP65. > > Results have been outstanding. > > Here is a link describing MAP65: > > http://physics.princeton.edu/pulsar/K1JT/MAP65_Quick_Start.txt > > My question would be, are there two separate IF outputs on the K3 if you > have two receivers installed? > > Better yet, can you get I and Q outputs for both receivers separately at > the rear panel to feed into a 4 channel soundcard, and then along to a > computer running Linrad and then on to a second computer running MAP65? > > Rick Kunath, k9ao > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
