Erratic behavior of Noise Blanker and Noise Reduction - buttons

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  • Question
  • Updated 5 years ago
Has anyone else noticed this?

- SmartSDR does not always remember the last state of the NB & NR buttons.

- Sometimes when SmartSDR starts or when you change bands or open a new slice, the NB and/or NR buttons will be blue, indicating they are turned on. However, I am hearing a lot of noise, like the function is not turned on, which is sometimes the case.

Click the NB & NR buttons off and on again. Now the NB and/or NR ... are blue and the noise is gone or reduced - they are now working.

It can happen with either the NB or NR and sometimes both.

- NR button may be active and working, however clicking it off and then back on and sometimes it will do a better job of reducing noise. (making receiver more quiet)

SmartSDR v1.43
Flex 6500
Windows 8.1
i7 Quad Core CPU, 8GB RAM, 2GB Nvidia graphics card card

73..  Ken - VE5KC
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Ken - VE5KC

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Posted 5 years ago

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Photo of Robbie - KI4TTZ

Robbie - KI4TTZ

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I've noticed something kinda opposite of that - if I have NR/NB (either/or/both and I'm adjusting the sliders, toggling one or the other on/off, adjusting some more, (etc), eventually the audio goes almost silent like I turned the volume to zero.

Then, if I turn both NR/NB off, it resets it back to the standard volume level and I can turn them back on and start adjusting the sliders again.  I don't remember the exact pattern I was doing to reproduce it, but if flex needs more info, I can try to document what I was doing.

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Walt - KZ1F

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Burt, there did change that in that now the speed setting on CWX is identical to speed on the right hand side dialog, they used to be independent of each other. I believe they should be in synch.
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Al / NN4ZZ

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I think that is the default when V1.4.3 is installed but you can change it.

Regards, Al / NN4ZZ  
al (at) nn4zz (dot) com

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KY6LA - Howard, Elmer

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NR and NB and ANF improvements (Science Projects) are slated to be part of Version 1.5

But if someone else is able to confirm this behavior and/or it is not a design feature Tim might add it to the bug tracker.
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Robbie - KI4TTZ

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I can confirm it, I just started up ssdr after a reboot of everything (needed to install a few windows patches), NR was enabled (blue) on a slice after startup but it wasn't really NR-ing anything. Toggled it off and on, problem resolved.
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W5XZ - dan

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NB has had that ADD-like behavior for a while, IMHO...sure hoping the 'science project' pans out..