Thetis NB 1+2 not working

[mhertkorn]

Hi there,

i have some noise in my Environment, with my TS 590SG i can cancel some noise with NB2, with my Anan 100 and Thetis there is no effect with NB1+2 to cancel some Noise, nothing at all.
Somebody knows whats wrong, is there some cure for this?

73 Martin

[w-u-2-o]

It's very hard to provide a good answer without seeing and hearing the noise you are concerned about. Is it impulsive noise, or is it normal atmospheric noise? Noise blankers are only useful with impulsive type noise.

Have you tried the spectral noise blanker (SNB)?

Have you tried any of the noise reduction (NR) modes? NR2 in "trained" mode (right click the button to get to the relevant setup page) is spectacularly good.

[mhertkorn]

Thanks for answer, it’s a impulsive noise, only NB2 kills it from the TS590SG,
on Thetis nothing helps not NB, NR or SNB.

[mhertkorn]

Therefore for DX work, can only use the TS590SG.

[mhertkorn]

Is there anything what i could try ? what is different to the TS590SG Noiseblanker?

[Tony EI7BMB]

What NB Threshold value are you using ?


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[mhertkorn]

The same on your screenshot.

[Tony EI7BMB]

Perhaps try a lower value to see if it has any affect.

[mhertkorn]

.

[mhertkorn]

I played around with this parameters,but nothing improves the noise, it’s not like the TS590SG, i suppose the NB in the TS590 is also an software algorithm, if so it schould be possible to improve the NB on the Thetis/Anan, anyway it’s probably not in the priority list. I must admit only the TS590SG works.

[Trucker]

Over the years I have found that no two radios noise blankers will handle the same noise source the same way. Some will work great and others not at all. Most noise blankers are hard coded and allow little to no, adjustment at all. Thetis offers a very adjustable noise blanker. But, just like many others, there's no guarantee it will work.
You might want to try to investigate the source of the interference that is causing you problems. If you can locate the source it might be possible to get someone to fix it. Especially if it is something like an arcing power line insulator. A portable AM radio or shortwave radio tuned to the band with strongest signal from the interference can help locate problems like a arcing insulator. Then, contact the utility company and report the problem and the location of the insulator.
James
WD5GWY

[mhertkorn]

Tnx James,

you are right, this days it is very difficult to deal with noise and there coming up every day new sources of noise like Photovoltaik etc. and it makes not anymore sens to investigate, its kind a like an hydra.

73 Martin