Something missed in this discussion.
When you change a NB/NR setting, don't expect a instantaneous change.
Count to five and then conclude whether a setting change helped or not.
In some past posting, this was pointed out by Elecraft.
73 de Brian/K3KO
On 7/30/2014 15:45, Jim Brown wrote:
On 7/29/2014 2:58 PM, Fred Jensen wrote:
Noise blankers do exactly what their name implies ... when a sharp
noise pulse comes along, they simply punch a hole in the signal [mute
the receiver] for a short period. The adjustable things are generally
the length of the "hole" and some form of threshold setting that
determines when it decides it's a noise pulse.
Fred has given you a great explanation and excellent advice. I'll add a
bit of clarification. A Noise Blanker does NOT do much (if anything) on
broadband random noise. Rather, it works mostly on various forms of
man-made noise. Much of the noise I hear comes and goes, and/or is
different on different bands.
As Fred has made clear, less is more -- when I use the NB, I often do a
long push on the knob to enter setup mode, and reset both the DSP and
the IF to those best compromise minimum values that reduce the noise
without chopping too much of the audio.
It also helps to RTFM, which has some advice about what the DSP NB does
and what the IF NB does.
73, Jim K9YC
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