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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
