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I've confirmed a number of times using a number of professional spectrum analyzers that the signal generator is putting out what the knobs indicate. The non-linearity is not due to the HP8648C. My

Hi Richard, Great! That's looking much better than mine indeed. I'll use your settings and see if it reflects the results, and do some more tinkering. Yes I know about the article from KA7OEI. I think

Below is a chart showing reported solar activity by this group since it started.? This was done with ChatGPT's help and only includes new posts with an image and using keywords. It is just an

Here's another article, tangentially related. I love the tidbit about Tukey and Hamming. https://1517.substack.com/p/why-bell-labs-worked -- Dave

Dave The non-linearity isn’t in SDR Console for sure. You’re using a single frequency stepped calibration where we use Jim Sky’s stepped wide band noise calibrator spanning ~8 MHz. If you have a

I was intrigued by the calibration of the standard RJ setup. While I do not use that setup, I decided to measure what I use for other purposes, including RJ. So, have a read of the attachment. I'm

Richard. Your right. In the SDRc2RSS middle window you will see where the RX888 noise floor is. It’s probably around -135 or so. In that case you’re going to have to set the dB threshold to -140

Do you mean to the left?? The problem is that it is already at 0. Richard

Richard Increase your RSS offset to the right to brighten up the dark end. Larry K4LED _______________________ [email protected]> wrote:

Hi Huub, I worked a bit more on the calibration today, and had a bit more success.? You can see the result in the attached image.? It is a bit closer to linearity than yours, but still a bit flat on

Thanks Salvador. John Sent from the all new AOL app for iOS

Hola John. I have this one. Salvador

Good evening:? ? ?All I have to offer are two weird solar emissions. I think they are solar because both coincide with characteristic spikes on Skypipe. Did anyone else see them? John

Alfi Your calibration looks great Alfi.? Raising the dB threshold to -140 makes senes as that matches the receiver noise floor. Thanks. Larry K4LED

Dear Alfi and Larry, and all, Thanks for the great information. Alfi, your calibration curve looks excellent, and I will try those settings for my backyard setup. To be clear, calibration is a very

Sabine,ALL, It is not the calibrator, nor SDRc2RSS, nor SDR Console. It is the difference between a consumer product and a scientific grade instrument. Highly accurate circuit design, quality parts,

Sabine, It is not the calibrator nor SDRc2RSS nor SDR Console. Below is a plot from my $5k receiver.? It is the difference between a low cost consumer product and a scientific grade product with high

Hi All, A weak signal from Io-B - not mutch but a signal - I think ! -- Aloha - john s,

Hi All, A minor sunburst over denmark latitude 55! Not much but it?s there -- Aloha - john s,

Dave, That's a very good history of the DFFT. I think you sent that video to me before and it's excellent. Thanks. It’s amazing to me that current discoveries are actually based on work by others