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Hi Larry, Adding a low-noise RF preamp sounds like an idea that would bring up the weaker signals.? I found this one on Amazon:

Hi folks, I too am having trouble getting a good Cal curve. Using the standard Radio JOVE setup with the RSP1B receiver. I managed to get a decent Cal curve using these settings: RF Gain = 9 IF Gain =

Hi Sabine, For those inflicted with RFI -- i.e., most of us -- sadly, windowing is absolutely necessary. As you said, FFT leakage is a concern for coherent emission -- like radio stations and radar.

Sabine, Yes your technically correct the FFT window is always on but you can select or deselect the various filter algorithms. Thanks. Larry _______________________ Click for K4LED Reference Links:

Larry, shortly after sending the message, I felt like I'd already started this discussion before. Sorry if I'm annoying. By the way, windowing can't really be turned off. Without one of the windows

Hi Richard, I've done some more testing today. Moving the band-scope ?lower or higher didn't make any difference. Same calibration curve everywhere. That's a good thing I guess. Then I fiddled a bit

Yes, windowing was not selected for that spectrogram. Sent: Monday, May 19, 2025 2:17 AM To: [email protected] Subject: Re: [Radio JOVE] Solar and RF fadeout North Tasmania, Australia Sabine, Luke

Hi Richard, This morning I realised I should have given you the full picture about the full bandwidth image I send you. So I zoomed in to the Jove band on my RX888 (RX2FITS) recording (the darker

That is wonderful, Huub. I am so glad to see this kind of innovation in Jove. We need people like you and Sabine! Aloha, Jim <huub@...> wrote:

Richard, Your calibration spectrum as-is isn’t terrible. It’s just not seeing the very weakest signals. Actually for weak Jupiter signals using an RSP1B is a better choice with more gain and less

Hi Larry, Our RX-888s run a bit warm to the touch, but not hot.?? We could certainly get some small fans that run from a USB port.?? Are you thinking that if we cooled the RX-888s that that would

Richard, You could try adding a small amount of RF antenna gain ahead of the RS888 MKII.? You can find low noise RF preamp on Amazon fairly inexpensive. Keeping the RX888 cool is a good idea. They

Hi Larry, Thanks for that explanation.? Do you have any guidance about how to get the beginning of the calibration curve down to the lower left hand corner of the graph? Richard

Hi Richard, I agree, bringer the attenuation to 20 dB will reduce sensitivity. But in this case I was trying to reach the full dynamic range. I'm sure there is a way to find the sweet spot between

Richard, The dB threshold in SDRc2RSS setting controls the noise floor. For most Radio JOVE purposes keep it as low as possible (-150 dB). Thanks. Larry K4LED _______________________

Sabine, Luke is using SDRc2RSS. It has a pull down list of “Windowing” like filters. While using these filters can remove certain artifacts in a spectrograph they do so based on the fixed filter

Hi Huub, Thanks for doing that.? I agree that the calibration curve is not very pretty; it should be more linear than that, I think.? I don't understand why you are introducing an attenuation of

Luke, a quick side note: Your spectrogram looks like the FFT is working without windowing. If this is SDRPlay2RSS generating the spectra, please enable "Windowing" in the "Integrate" menu. You'll get

Hi Richard, So I did a calibration today with the following results. (see images) For RSS: (forgot to take a screenshot) color offset: 0 gain: about 1.2 Not the most pretty curve I have to admit but I

Hi Richard, From what I remember some values from SDRC. Visual gain: 0 ATTN : -20 dB HF-Gain: about half way 55? Bandspan: 16 MHz Can't remember the SDRC2RSS values but the those mentioned in the