When the DSP noise reduction is not being used, the Omni VI+ is analog.
Yes, there is digital control of many things in the Omni VI, however the
signal path from antenna input to headphone output is entirely analog
unless you are using the DSP NR. PLL phase noise in the local oscillator
might be called "digital noise", but it is really quite different from
what happens when a signal gets digitized and processed digitally. The
Omni VI is an analog radio with digital control systems, until you turn
on the DSP NR.
DE N6KB
I've done the same "test" with my OMNI VI+ and Corsair II but also tried the major CW pile-ups 1-2 KHz from a weak DX station. It seemed to me (just earballing) that there were less Sum and Difference products from the strong stations in the pileup falling into the passband on the weak DX station with the Corsair II. But it may be I was only wanting the analog radio to outperform the digital one.
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