Has anyone obtained any good results using the noise reduction with ESDR3.
My comparison is that in the Apache Labs equipment using Thetis software, the NR2 is outstanding and sets the standards. Next is the DNR on the latest Yaesu radios.

Maybe I am not using the right settings (and i have tried a lot) but i cannot get ESDR3 to even come close.

Glenn Holt
G8NOF

I have both an Anan7000 and a SunSDRDX2. The newer NR on the Sun is ANC, not the older NR. You have three choices with the ANC, A/B/C. You can also set the AGC to auto magic and pick the target SNR which helps.

I find the Sun is close to the Anan in terms of NR now. NR2 on the Anan still is better, both in terms of noise reduction and audio quality, but the Sun is pretty darn good. I switch off on both radios every few days and like them both.

Doug

Hi,
I must be doing something incorrect.
I have a RX antenna (2x K9Y remotely controlled) this going into a 4 way splitter with the following radios connected:-
1. My Anan Orion Board project (equivalent to an Anan 7000)
2. Yaesu FT891
3.Susdr2dx
4. Colabri nano

The Anan runs Thetis and the EE radios run ESDR3
I realise that ANC is the noise reduction on ESDR3 and the Agc is set to 12db S/N
But on ESDR3 there is no noise reduction on signals below S5. However on the Anan and the Yaesu there is a significant noise improvement.
Am I missing something?
Seasons greetings
Glenn
G8NOF

The NR works pretty well on say Powerline noise-
But other noises it is in my opinion lacking when compared to other rigs, like you have noticed

I also find the ANC, troublesome as in it very much degrades the audio quality on any setting,

I use the AutoAGC, and now the Squelch (that's for adding that back), it helps

But would agree it needs improvement compared to other modern rigs with DSP and not even close to NR2

Of course this is a subjective topic, the ANC can be helped by running the AGC auto SN to 15 at least. Wish there was a line on the panadapter like the Anan. Also make sure the preamp is off, perhaps -10 on the lower bands. I have the preamp set to +10 only for 15m on up.

NR2 is the gold standard for sure.

Doug

Preamps on SDR if you engage them will lower the noise floor by nature of the noise figures in the ADC and electronics

I always run the Preamp at +10
other things that come into play are RX spectrum sample size

The auto AGC is subjective at best as you can't really say use this number or such, because each antenna is different, and thus so is RX gain

Using +10 dB of preamp gain all the time will result in lower dynamic range and better sensitivity. However, if the band noise is high enough, which with a full size antenna will almost always be the case on 20m and below, using a preamp will result in no improvement in sensitivity, but will always result in lower dynamic range, which might be a problem if there are large signals present.

A side-affect of using too much preamp gain will be a noisier recovered audio signal. Which is your complaint.

An SDR is no different in this regard than any other topology. If you simply crank the RF gain up, the AGC will likely wind up acting on it. That is why receivers have RF gain controls, and we have a preamp capable of attenuation, or gain.

In the Anan, if you research it, you will find the best receiver performance (dynamic range) will occur if you apply S-ATT to each of the lower bands.

To determine if preamp gain is needed is easy, simply turn off any auto AGC, switch between your receive antenna and a dummy load (or another input port). If the band noise is substantially higher with the antenna connected, keep lowering the preamp gain until you have perhaps 10 dB of excess band noise over the no-antenna case. Then you will have little sensitivity degradation, and maximum dynamic range. You'll also have better (lower noise) recovered audio.

Try what I suggest as an experimentation to set the preamp, and then see what you think about ANC with the auto gain set to at least 15 dB. Go back and forth with the Anan and NR2. I have many times. The Anan is better, but the Sun is not bad.

Just my two or three cents ...

Doug

I meant to add, you are correct in that the lower the SNR the more NR2 will outperform the Sun. All you can do is try to minimize any excess noise injected into the system. But compared to a year or so ago, the Sun has improved considerably.

Doug

it's improved some yes, but still I think that even NR1 gives it a run without auto degrade and then NR2 I haven't noticed audio degrade

I frequently operate 4-8K rx/tx and have a very good ear.

V3 distorts audio esp. the ANC on any setting it is no longer natural sounding, and this is where NR1/NR2 have a HUGE advantage

You are right, particularly if you want higher fidelity. ANC will reduce noise, but will definitely alter the audio. I find for narrower bandwidths, 3k or less, the audio is communications quality, but the audio is definitely colored. If you want better reproduction up to 8k probably NR2 is the only way to go. I don't know any other radios with that type of NR and quality of audio. My Yaesu has "good" or shall I say aggressive NR, but high fidelity is not one of its qualities.

Doug

All of the DSP needs a lot of work in esdr3!
NR,NB, ANC ....

I have been plagued recently with a broadband pulsing, hissing noise, especially when operating 160m.
The entire base line would jump up and cut out the desired received signals
I just started to use the NB and by adjusting the Threshold (40dB) and the Pulse Width (44us) I was able to remove this interference entirely.
Just a note, it's not Christmas lights or other decorations.
I am using SDR3 Version 1.0.2 Beta
"NB" works great here.

Happy NY
Tom W3FRG

Personally, I am very happy with the ESDR3 software and the ability to remove noise from the received signal.
I really can't see what the debate is about!

Hello to each other,
I wish you a Happy New Year.
My experience is just the other way around. The noise reduction on EESDR3 Beta 1.02 works fine and the sound does not change. Only the noise is suppressed. With the other devices the modulation becomes mostly dull