Still interested in any comments about how the KX3 noise blanker is
implemented, and if it could be improved to make it as effective as the wide
band RF blanker in HDSDR.
I now have the SDRPlay tracking the KX3 VFO so that in the event of static rain
QRN I can switch to the SDRPlay for good
David,
The KX3's noise blanker is implemented entirely within its DSP. Ahead of the
DSP are the mixer and its duplexer, which have a finite bandwidth, and possibly
the roofing filters, which have much narrower bandwidths. Because of this,
there's no way for the DSP to gain access to wideband
Hi Wayne,
Thanks for the nice info on the KX3 NB operation. How does the much lower
opposite sideband rejection limits the effectiveness of the KX3 in a
competitive environment? I have always imagined that everything is good as long
as a strong signal doesn't get closer than 1 khz. Am I
Wayne,
Many thanks for the comprehensive reply.
Next time I encounter the static rain/snow that completely overwhelmed the KX3
noise blanker, I will make a short wide band RF recording from the SDR and can
send you a link to the file which may help with developing other DSP noise
blanking
I use my KX3 on 144 MHz (with external transverter).
Comments regarding the KX3 Noise blanker:
It is effective for some kinds of power line noise and ignition noise, I
normally leave it on at a setting of 6.
It is not effective at all with heavy rain or snow static.
By way of comparison I have
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