KX3 seems to be switching IQ signals SSB. I have encountered an issue with the KX3 where it appears that the IQ signals are randomly switching or the gain from one channel abruptly changes. There has been extensive troubleshooting of the issue with Tom at va2fsq.com <http://va2fsq.com/> . Symptom: Random and intermittent switch of the IQ signals from the KX3. This occurs a few times an hour or more on my system and can last a few minutes to upwards of an hour and then switch again. On Tom's computer he has seen it once. In the normal situation, we see signals as show in this picture. http://va2fsq.com/wp-content/uploads/Normal.jpg Here we have both Win4K3Suite and NAP3 spectrum scopes displaying a signal. Tuning the radio up will lead to the expected behavior where the signals move to the left (lower in frequency). Sound coming out of the KX3 through the speaker is normal and so is sound demodulated by NAP3. Now randomly, a few times an hour the following happens: http://va2fsq.com/wp-content/uploads/shifted.jpg Here you can see that the signal of interest has now shifted down by 16kHz. This occurs with no transmissions and can correct itself again randomly or can stay as such for some time. When the signal is shifted, tuning up on the radio moves the peaks higher which is consistent with the IQ signals being connected incorrectly. At this point if, you go into the settings of Win4K3 or NAP3 and select "SWAP IQ", everything goes back to normal in the display. However, if you switch bands all the other bands will be incorrect which is expected. In addition, the sound coming out of the KX3 is still normal however in NAP3 the sound disappears completely. Moving the cursors in NAP3 16khz down (radio still tuned to the original frequency) will present sound but only if USB is selected. Again this is consistent with the IQ signals being swapped. There has been extensive trouble shooting of this issue. Sound cards have been changed, software has been updated and debugging versions of Win4K3 been installed. Cables and connectors externally have been examined. No homebrew cables have been used only relatively new elecraft cable connected. In all cases the issue does not change.
Appreciate your thoughts, wisdom and experience to correct this issue. 73 PeterV Jersey Shore, Home of tubby but tough Governor and Tough but tiny KX3 WB3FSR ********************** ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
