> > D.J. > > no, you are not wrong. You should see a spectrum differentiated in >its negative part from the positive one. If you don't, then that >means >that you are not feeding Winrad with a correct couple of I/Q signals. >Either one of them is missing, or the two are equal. > >Are you perhaps using a laptop ? Many today's laptop do not have a >true line stereo input, but just a microphone input, which is mono, >and in this case just one signal reaches the ADC on the sound chip. >Or, if you use a true stereo input, check the connectors and the >cables, and possibly the PCB board. If you have a dual trace >oscilloscope, look at the I/Q signals in chopped (not alternate) >mode, > so to have a feeling of their phase relationship and their >amplitudes. > Check if one of them is much lower in amplitude than the other. > > Those are the most probable causes of what you are observing. > > 73 Alberto I2PHD >
Hi everyone and especially Alberto! I'm also experiencing the same problem, but I noticed that taking one of the signals off (I or Q) makes it worse. So I have some attenuation for the image, but not enough. I also tried the phase and amplitude adjustments but couldn't cancel out the image better than it was. For example, I can see the same CW station bouncing at both sides -/+40 kHz. I tested the delay tab at the phase adjustment tool and sometimes it seemed to help a little bit with the phase adjustments. I checked the RX I and Q outputs with scope, they were nicely 90 degrees separated and their amplitude was pretty much the same (to the bare eye in the scope screen). I know this is my fault, not the software :) I'm using EMU 0404 192-kHz 24-bit card with ASIO drivers and have noticed that playing with asio isn't one of the most easiest things in world :) One of the first things of course was to check the PAN ajustments which were correct - fully left and fully right. Alberto, I2PHD, thank you for sharing this great great software!!! I just installed it yesterday (bascially because of this thread) and I'm very pleased what I see. You guys have done some really awesome work there!!!! 73 de Janne, OH1GTF
