I find your channel highly entertaining and educational,I admire your hands on approach and practical outcomes,please keep up the good work Paul.

@W1VLF

Жыл бұрын

Hi Colin, Thank you for the kind words. I like the hands on approach to learning as I was not able to go to college when I was young. Now it too late for an old guy like me. Glad you liked the video

Hey thanks, what a great illustration of this function, Straight to the point, minimal bloat content.

Why not a sine wave instead of the little portable radio? Am I misunderstanding something about the inherent process in the single processing variables?

Very interesting, thank you! I wonder if diversity mode can be done with SDR Console instead of SDRUno? I have RSPdx, (not duo) and cheap RTL-SDR dongle. Maybe cheap dongle can be used for local noise sampling and RSPdx for an actual signal? Not sure if that's possible (not in SDRUno for sure as it's only supporting SDRPlay) but would be great to find out! Either way, thanks for the great content! :)

@B.Murphy

Жыл бұрын

Very interesting idea. I have the dx & a couple rtls.

@W1VLF

Жыл бұрын

You cannot do noise cancellation with 2 separate RX's that do not have phase coherent reception. But you certainly can use an MFJ 1026 or ANC-4 and others to achieve the same results. See this video I made about that a few years ago. kzread.info/dash/bejne/paSmx5mQnpOxodY.html

@1rfsam

Жыл бұрын

@@W1VLF you mean LO phase locking? RSPDx has an external input (additional SMC connector I believe) for that and I believe there are internal pads in RTL-SDR that can be used for that as well with some soldering work and if LOs frequencies are the same. So, it's possible to do physically but not sure if it can be done easily with the software afterwards. Most likely using 1026 or ANC-4 would be an easier thing :) It would be great if you could do a 1:1 comparison between doing noise cancellation with RSPDuo (using both channels like what you showed with that video) and 1026/ANC-4 under the same condition (using same RSPduo's single channel as a receiver)! I do have a DIY solar system and this stuff is quite interesting for me and I was actually thinking about getting 1026 or ANC-4 myself.

@W1VLF

Жыл бұрын

@@1rfsam Thats a good question. I think its more than that. There has to be some provision for adjusting the gain and phase of one or both of the decoded signals. Not sure how you would do that in the audio domain. In the RF domain you can use a MFJ 1026 or ANC-4, or you can use the magic of the Software the Jon and his associates provide. I have a feeling its more math heavy than I can actually describe.

Thanks for the demo Paul that addressed my earlier question. Very impressive results in noise suppression using the diversity mode in SDRUno. With coupling in a "clean" noise source, it lets you really zero in on the optimal phase and amplitude cancellation settings. Are you the only one in your immediate neighborhood with solar panels? I would imagine that each house with solar and its own inverters and optimizers would represent additional independent noise sources. I have multiple neighbors within 100 yards who have rooftop solar, and one with several panels in his backyard. Once the sun starts shining, I can see a similar pattern of noise, except mine are bands about 5 kHz wide and spaced every 17 kHz. I have no clue who the culprit is, perhaps it's everyone together. I may have to drag out a small loop and walk around the neighborhood and do some direction finding to see who is putting out the loudest source of interference. Thanks again for the great video, Paul. 73 Ken - WBØOCV

@W1VLF

Жыл бұрын

Yes.. I am only one... I installed the system years ago when I was in a ham radio hiatus. Now I have to depend alternate means to remedy the situation, Such as the phasing solution in SDR-UNO or other external means. Adversity such as this causes one to use creative solutions. Very possibly you have some inverter noise. The earlier version of the inverter at my house had base frequency of 18 khz which sounds like what you might have.

Hi, I use the diversity scheme to reduce noise with SDRuno slightly differently to you when receiving on the RSPduo. What I do is have two antennas spaced apart as much as possible so they are both receiving the signal but with slightly different noise profiles due to their location with regard to local noise. So, input A is (signal + noise1) and input B is (signal + noise2). The diversity auto-adaptation algorithm works (I think) by enhancing what is common to the two antennas and reducing what is different. So,, in this case, the signal is enhanced and noise 1 and noise 2 are reduced, This works very well for me. I think in your case, both antennas are receiving the noise from the inverter, so the diversity algorithm is not doing a good job of cancelling it. However, you override this feature and do a great job manually. Ing you don’t mind, I will forward a link to your video on the SDRplay Facebook page since I know a lot of the guys will be interested in it. Cheers, Mike.

@W1VLF

Жыл бұрын

Hi Mike... That makes a lot of sense about the algorithm. I do not have any other antennas that RX the noise very well as most of them are 300' away in the woods. Yes please pass along the link. Thank you for watching and commenting

I wish my noise was only that bad on the MW band.

Thanks!

@W1VLF

Жыл бұрын

Thank you Steven.. I am glad you enjoy the content. I will do my best to continue to do so.

Can you add a "Thank you" button like some other youtube channels do? I'd love to press it and send you a few $ as an appreciation for the great youtube channel!

@W1VLF

Жыл бұрын

Hello it took me a little, while to figure it out, being an old geezer but I got it done .. Thank you for the suggestion. W1VLF