--- In [email protected], "sbumpous" <[EMAIL PROTECTED]> wrote: > > What am I missing here? > Shouldn't a correctly balanced I/Q phase and ratio balance out the > images on both sides of the center frequency? Or does the null only > work at one frequency?
If the hardware produces I and Q signals balanced in amplitude and at 90 degrees from each other, you should see no image whatsoever on the entire band. > > Any help would be appreciated in understand whether: > 1. my concept of what I should see is wrong > 2. the hardware is problematic, > 3. the software is problematic I would check carefully the hardware. Either one of the two I/Q signals is missing, or has a different amplitude, or the phase is far from being 90 degrees. Remember that the adjustments (manual or automatic) present in the various programs are meant to correct just very small imbalances. Their adjustment range is purposely limited, just to tweak small imprecision in the hardware. 73 Alberto I2PHD
