Ashar,
Thanks for the reply. I think I'm finally starting to understand this.
Related to this, I see that the sideband inversion for LSB is done in the DSP software. Was any consideration given to doing sideband inversion moving the 2nd mixer above the first IF like was done in the uBitx? That would invert the spectrum, but the sBitx is already inverting the spectrum twice by using the top half of the DFT output then plotting from high to low.
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73,
Mark, N8ME
Mark Erbaugh