> Just to clarify Orion's implementation of DSP NR, I
> believe your statement is true for ANY DSP rig with real-time
> processing (i.e the DSP is achieving NR simply by BW
> reduction).
If NR were being done by bandwidth reduction, the method I've used to
measure it should show some improvement in SNNR, at least above the very
narrowest bandwidths where the amount of noise relative to signal is already
reduced substantially. The v1 Orion appears, by inspection of FFT spectra
with NR on, to be doing just that -- although the actual impact on SNNR
values is unknown.
As I've said before, this is one set of numbers in a vacuum. Maybe no
better or worse than any other radio or outboard processor. I haven't been
able to measure a v1 Orion or a Brand X for comparison. I'd be happy to
discuss my method off-line with anyone who wanted to take the same approach
on the v1 or some other radio/device. My "portfolio manger" won't allow me
to purchase several radios for a 30 minute test run each :-)
> There is no free lunch and DSP is not magic, despite
> what some manufacturers (notably not Ten-Tec) would lead you
> to believe.
Absolutely agree.
Grant/NQ5T
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