G8JNJ
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For example this is what I see when I use the KiWi AF spectrum to look at a radar signal. https://forum.kiwisdr.com/uploads/996/1MDUZTTGZHWM.png And this is with Sound Card Oscilloscope looking at the AM demodulated output. Frequency domain https:/…
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Hi John, OK maybe we are cross purposes ? It doesn't seem to show the demodulated audio, for example if you use Synchronous AM but slightly off tune, the carrier shows up offset from the AF spectrum centre line. This would not be the case if it was …
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Would moving the S Meter to the top of the control panel help create more space for the detail in the sub panels ? Perhaps by having page up down sliders to move through the detail. Personally I'd prefer the S Meter at the top anyway as my windows c…
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I like the idea of an "Options" menu button instead of Extensions as I think it is a bit more descriptive of the function, however I'm not sure how you would layer the menu tree.
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Yeh the toggling through multiple sub menu pages is a good idea. I don't think casual users would be upset, as many don't even get as far as using the detailed menus, they just tune to a frequency an sit there :-( However personally I'd like the vol…
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Some quick thoughts for discussion. Personally I find the KiWi to be the best receiver I've used for general purpose utility monitoring, and I very much appreciate the time and effort John has gone to in initially bringing the product to market, con…
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It is rare for a software upgrade to cause problems, and I don't think this is a Debian version problem, as I have a mixture of 8 and 10 on my KiWis and they all continue to behave as normal. You say that you have lost www access, but then go on to …
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You are correct. I just tried it again, and it is creating the label on the correct frequency, but it will not store. I'm not sure why it defulted to 30000 when I previously tried it.
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Yes it's the same with me. If I shift click on the GUI to create a new label, the frequency defaults to 30000 rather than the frequency the cursor was set to. If I change this to the actual frequency an orange boarder appears around the green add bu…
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Yes, normally the indicated signal would be much wider than the receive bandwidth, so the green receive passband marker would fall within the much wider signal bandwidth marker. With wideband signals such as radar and HF Trading the demodulation mo…
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Oops appologies, I was looking in the wrong file. The Aero allocations are already in the community database. http://kiwisdr.com/dx/dx_community.json
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Likewise I think the ICAO Aeronautical High Frequency Enroute Network Major World Air Route Areas - MWARA allocations would also be a good basis for a worldwide generic database. https://aeronauticalradio.weebly.com/
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I think the ITU Marine HF channels would be a good addition as they are an international allocation and good for a worldwide generic database. See about 1/2 way down this page https://www.hfunderground.com/wiki/index.php/HF_marine
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I still can't get the Spectrum shortcut: Typing alt/ctrl-s will toggle the spectrum selection in reverse: That is off->RF->AF->off becomes off->AF->RF->off (shift-s already used for auto-scale) to work for me, but m…
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Hi John, Sorry, but I'm not keen on the explanatory notes that have been added to the DX label. I think they detract from the purpose, Admins will already know about how to perform an edit, and personally I find the shift-option-click description to…
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Hi John, Thanks for all your hard work it is much appreciated. I like the new features, especially the signal bandwidth marker. I have a few suggestions. Maybe the signal bandwidth marker could use the same colour as the DX label that it is associat…
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/16064#Comment_16064 Hi John, I have left a request as a Github action, but I won't hold my breath. https://github.com/priyom Regards, Martin
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Should have added a link to Direct TDoA Github https://github.com/llinkz/directTDoA
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And there is more... I wonder if the degree of correlation (or size of map 'bulls eye' ) could be used to provide some sort of percentage confidence figure along with the likely co-ordinates. Sometimes it is difficult to know which world region to s…
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I don't think you could easily differentiate between noise and the desired signal on a single KiWi automatically, but maybe after the TDoA run the KiWi(s) that didn't correlate well could be flagged up with an icon, so that the user knew and could c…
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Hi John, Yes I agree, it was a wild idea, as a lot of work would definitely be required to automate the TDoA selection process. I guess the accuracy could also be further improved by some sort of machine learning, by analysing the TDoA requests sent…
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Hi John, Thanks for this most useful. It would be great if the search filters also worked with the http://rx.linkfanel.net/ map link on the rx.kiwisdr.com page so that only the filtered KiWi's map pins appeared. Regards, Martin
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Thinking about this a bit further, and this is just a wild idea... The reason I'm interested in the SNR scores is mainly when choosing KiWis fir TDoA runs. The big problem is the identifiers used on the TDoA map don't always match the names used on …
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Hi John, This is a useful enhacement, but in order to reject the poorer performing KiWi's, I wonder if it would somehow be possible to sort / filter by SNR score too. e.g HF>30dB Regards, Martin
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After the initial flurry of interest in the Chicago to Europe HF circuits, there is now an increased focus on USA to Asia. Blog posts in Japanese https://jj1wtl.seesaa.net/article/499204144.html Unfortunately the page doesn't seem to work with Goo…
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Hi John, An interesting possibility that it is the HF traders, especially since they seem to be admitting to it. Thougts... What frequencies have they been tuning to, as this may indicate which ones are doing this ? Is there a way to log short durat…
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The majority of lightning that is heard on the lower frequency bands is generated by the cloud to ground stroke and associated discharges. These typically peak at around 9kHz and this is that is detected and located by the various lightning mapping …
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The actual KiWi DT was discussed in a previous thread, and in my tests seemed to be correct, but maybe someone else could try something similar to confirm my results. https://forum.kiwisdr.com/index.php?p=/discussion/comment/15715#Comment_15715 Rega…
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OK, good to know.
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Ah, I thought it did affect the decode timing too ? I'm pretty sure when I deliberately offset my transmitter timing to test the dT range, and I then varied the KiWi dT calibration, it changed the time window for valid decodes too. But maybe I just …