I think you both miss the point, about 10 messages back one of you stated
the it sounds like it works , eve though it was caused by both the signal and
noise dropping causing it to sound like a better signal/ noise ratio.
Bottom line to me is that if is "sounds better" and I can hear it better, it
does the trick for me. I don't care about all the details behind it or
which meter you use, if I can hear it better, then its "better.. YMMV
tom N6AJR
====================================================
In a message dated 3/14/2006 11:03:28 A.M. Pacific Standard Time,
nq5t@comcast.net writes:
> Grant, I don't believe the 331A is True RMS.
> I cannot find anything on Google to confirm that the
> 331A isn't True RMS, but that's what I recall.
You're correct. I had to dig around and find my spec sheet. Live and learn
:-)
It is RMS, calibrated to a sine wave.
> Let's just think about your conclusion.
> 8-10 dB S/N improvement over the 100 Hz DSP BW implies a
> 10-15 Hz filter bandwidth
I understand that, and appreciate it. The fact remains, there does appear
to be further improvement in SNNR with NR engaged, even at narrow
bandwidths.
Perhaps someone with better lab resources will poke around at this stuff,
too. In the meantime, I'm going to go shopping for a 339A or something
similar :-)
Grant/NQ5T
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