In a message dated 3/26/2006 8:59:38 A.M. Eastern Standard Time,
btippett@alum.mit.edu writes:
>BW=500Hz: SNNR degrades by approx 2dB with NR=9.
Degrades?...strange result! This
implies a noise bandwidth of ~800 Hz. Simply
turning DSP BW to 100 (which has an actual BW
of 150 Hz) should **improve** S/N by 5.2 dB.
I believe what he is saying here is that the distortion introduced at NR=9
degrades the S/N ratio. That is certainly true by observation regardless of
the "theory." I would say the signal becomes totally incomprehensible at NR=9
and the degradation is worse than measured. And yes, it does mean something
is not working right - the NR in ver 2 is terrible.
k4ia
Craig "Buck"
Fredericksburg, Virginia USA
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