New P3 beta software, version 01.28, is now uploaded to the Elecraft web
site:
http://www.elecraft.com/software/P3/elecraft_p3_software.htm
This requires K3 firmware version 4.25 or later and if you have the SVGA
option, SVGA firmware version 1.16 or later. As always, beta test
firmware may have new issues that we haven't caught during field
testing. Please report them to k3supp...@elecraft.com.
This version has a number of enhancements and bug fixes as described in
the p3fwnotes.rtf file. The major new feature is noise blanking. Below
is some explanatory text that I will be submitting to add to the P3
Owner's Manual.
Enjoy!
Alan N1AL
=================
Noise Blanker
The noise blanker in the P3 reduces the effect of impulse-type noise on
the display. It has little or no effect on other types of noise such as
thermal noise and static crashes but can dramatically reduce impulse
noise from sources such as the AC power line and the ignition systems of
motor vehicles.
The noise blanker is turned on or off using the menu entry "NB En",
which can be assigned to a function key for easy access. You can adjust
the aggressiveness of the noise blanker algorithm with the menu entry
"NB Level". The higher the setting the more completely it blanks the
noise but also the more likely it will cause distortion of desired
signals. Use the lowest setting that effectively blanks the noise. A
value of about 10 or 11 is a good starting point for experimentation.
Note that the REF LVL and SCALE settings have no effect on the noise
blanker.
If there are one or more very strong signals within the P3 displayed
frequency range, the noise blanker has a hard time detecting the
difference between the unwanted pulses and the wanted signals. The
solution is to narrow the span and/or offset the center frequency
(perhaps using fixed-tune mode) to place the strong signals well outside
the P3's display range.
===============
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