Noise blanker

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SM4GRP
Posts: 3
Joined: Tue Nov 23, 2021 8:11 am

Noise blanker

#1

Unread post by SM4GRP »

Hello,
I miss a good noise blanker in SDRC. Regardless of the settings in SDRC, I don't see any effect at all of the current noise blanker. Thus I can't use SDRC during the summer months :( since I live in the country side with electric fences close to my antennas.

I use an ELAD FDM DUO + DUO ART 120 with DL2EBV preselection filters. ELAD's own software SW2 as well as the radio itself has a very good noise blanker.
Thank you for an otherwise excellent software!
73/Kjell-Göran SM4GRP

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KA1GJU
Posts: 366
Joined: Tue Aug 11, 2020 2:16 pm

Re: Noise blanker

#2

Unread post by KA1GJU »

A properly maintained electric fence will have ZERO RFI. I have one that is inches away from the KA1GJU Super Station #2 feed point. (On the same wooden post!) to keep the cattle contained. If I look very carefully at the waterfall, I can ONLY see the horse farm and two dairy farms that are 1/4 to 1/2 mile away in various directions thanks to my nearly weekly walks along the fence to remove tree branches, vines, tall weeds,l leaky insulators (cracked insulators will make snapping sounds) etc. This HAS to be done with every thunderstorm since some of the fence is under the canopy of trees in some locations.

If you talk to the owner, would he/she let you walk the fence and remove such growth? Worth a try, since it's a win/win for both of you. ;)

On a non-SDR rig, the NB will make strong signals sound distorted, until you figure it our that the NB was on. My Icoms are used by remote users and sometimes I find the last user had used some VERY bizzare settings, as if they had no clue as to how to use an HF rig. There should be no reason to turn NB, NR, and AN on all at the same time! :o
73 Kriss KA1GJU Home of the KA1GJU Super Station SDRC Servers in NH, USA (FN42mw, FN43na, and FN42lt)

SM4GRP
Posts: 3
Joined: Tue Nov 23, 2021 8:11 am

Re: Noise blanker

#3

Unread post by SM4GRP »

Thanks for your valuable input. The land belongs to ourselves and the farmer is a relative to my wife so no problem at all to do what you suggest. Still my whish for a good noise blanker in SDRC remains.
73/Kjell-Göran SM4GRP

K1FSY
Posts: 19
Joined: Mon Mar 27, 2023 1:30 pm

Re: Noise blanker

#4

Unread post by K1FSY »

Are you using the noise blanker in the receive pane or the one on the home tab of the top ribbon bar? I have never found the one on the receiver pane to do anything, I assume it applies only to the bandpass similar to the other settings on that pane. However the one on the home tab works very effectively when the slider (in the options, button right below checkbox) is set to the right level. It will be foiled by any strong signal in the entire visible bandwidth, so you may need to tighten it up or tune around away from strong signals for it to work best. It should always do something if you set the threshold low enough. It won't be useful but you will be able to see it do something.

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