David,
Yes, the KNB2 does have a threshold level - anything below that level
will not trigger it. There are two threshold levels available from the
front panel (Hi and Lo). You could dig into the KNB2 circuit and lower
the threshold if you really find it advantageous, but turning on the
preamp may help (and will indirectly provide 4 levels of NB threshold).
Make your judgment about which is best according to your noise source.
Remember that the KNB2 works best with impulse noise (like gasoline
engine ignition), and will not do much for a constant 'popcorn' noise or
atmospherics - the DSP noise reduction is best for those kind of noises.
73,
Don W3FPR
David N. wrote:
Well after following Dons directions about Q21 I found
That the noise blanker worked so I tried the test
again
Well still no effect for giggles I turned on the
preamp and the noise blanker worked after shutting off
the preamp the noiseblanker continued to work.
So I guess a certain amount of signal is required to
trigger it. I normally do not run the preamp.
And by the way the preamp does work as advertised
So my next questions is what else do I need to do to
correct having to turn on the preamp to get the KNB2
to kick in?
Thanks
David KR4OW
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