[Elecraft] Help with IF Noise, DSP Noise, NR settings

Don Wilhelm donwilh at embarqmail.com
Fri Jun 14 14:18:17 EDT 2019


It may be better said that a Noise Blanker responds best to impulses 
with a fast rise time like ignition noise from a gasoline engine.  It 
does not have to be repetitive (but often is).

73,
Don W3FPR

On 6/14/2019 2:05 PM, Wes wrote:
>   I have one little nit to pick with this.  In a properly designed 
> blanker, there is no requirement that the noise be repetitive; blanking 
> should occur on a single pulse or on random pulses.  Blanking becomes 
> ineffective when 1) an undesired signal appears in the detection 
> bandwidth that exceeds the threshold and triggers the blanker more or 
> less continuously or 2) the duration of the noise pulse is so long that 
> intelligibility suffers. Atmospherics fall into this latter category.
> 
> See: http://k6mhe.com/n7ws/Noise_Blanker.pdf  for more of my opinion on 
> this. (The missing text in the last paragraph was not my fault.)


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