Not to put too fine of a point on it but strictly speaking, that is incorrect.
The characteristics of a pulse that can be blanked are:
1) its amplitude is sufficiently greater than the desired signal so it can be
detected as undesired (noise)
2) its duration isn't so long that the "hole" punched in the signal appreciably
degrades intelligibility.
Note that *one* pulse is all that is needed. A repetitive pulse train that
satisfies 1) might not satisfy 2, if the pulses are too close together.
Conversely, totally random pulses can satisfy both 1 and 2.
Now in common ham lingo, what you say is true: "repetitive noise" is something
like ignition noise and "random noise" is static crashes or the like, so those
terms meet my previously stated criteria.
On 2/4/2016 4:46 PM, Bob McGraw K4TAX wrote:
The purpose of a Noise Blanker is to act only on repetitive pulse type noise.
They do little to nothing for random type noise issues.
73
Bob, K4TAX
On 2/4/2016 5:29 PM, W5RDW wrote:
I think the Collins NB was most effective on pulse type (ignition) noise
encountered in mobile applications.
http://collinsradio.org/archives/manuals/136B-2_5th-ed-11-66_.pdf
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