jks
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- jks
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I'm still doubting if an NFM roll-off of 6dB/oct (20dB/dec) starting at 300 or 400 Hz is correct though. It seems very severe compared to the 75/50 uS AM/SSB de-emp. Since the Kiwi sig gen doesn't have an FM modulator, and I wasn't able to cobble to…
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I'm still working on the de-emphasis filtering. I can now do FIR filter design in Octave (MATLAB). Something I couldn't do before and never really understood.
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I'm interested in knowing how the Kiwi does using Starlink. So please email support@kiwisdr.com and I'll set you up with the proxy service.
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@fabrys That's very odd. Looks very much like a bug. Although we should have noticed something as basic as that long ago (showing a duplicate [existing] ip address). On the Admin page, Network tab, what is Prevent multiple connections from the same…
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@G8JNJ No email yet Martin. Please try again. Thank you. Edit: got it. Thanks.
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Okay, so NBFM/NNFM should control the existing Kiwi passband filter which for FM is a filter on the FM demod input. That's what I have now. I can work on adding a correct de-emphasis filter next. I found the 400/1k Hz FM mod function on my sig gen, …
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The "clicks" (spikes, roughness or "crackling" sounds) are caused by not having a clipper after the demod. Both CSDR and SDRAngel have this. The Kiwi uses the CSDR demod and I failed to notice the clipper the first time I looked …
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This is more complicated than I thought. There are two separate passband concepts here. The Kiwi passband that you see in yellow/green on the frequency scale, and in the waterfall etc, is applied to the FM signal with its corresponding deviation. Th…
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I have a fix ready. But it needs to be tested against real signals which I don't have reception of here. So no software release with these changes until I can test them..
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I need access to a Kiwi with reliable NBFM reception. Preferably with an open ssh port. Please email URL, port and password info to support@kiwisdr.com Thanks
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I could add that pretty easily. Is 6 kHz the right default value? (default is of course configurable on the admin/config tab).
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@fabrys From your July 2022 post, are those unscheduled frequencies for NMC/NMG/NMF (USA) passband center or dial frequencies? Today I added UGC St. Petersburg 2640 (passband presumably) to the menus (no software update needed -- just reload extens…
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When you restore using the sd card does the LED pattern match what is described in the documentation ? Back-and-forth pattern for about 5 minutes. All LEDs on for about 30 second. All LEDs off andBeagle powers down. After that, and removing sd card,…
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Good catch. Might want to add your report here (account required): https://www.drmrx.org/forum/showthread.php?t=3068 Or on Twitter using tag #drmlog
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https://github.com/priyom/dyatlov#legend
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No, it supposed to do that. The WF min value changes +/- 3 dB for every factor of two in bandwidth (one zoom step). For the same reason a passband filter noise floor gets quieter/louder every time you half the bandwidth. This has the beneficial side…
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Will be explained later. I am making some general releases without comment because I need to do testing of new DRM code using many different Kiwis due to DRM reception conditions. For example the new Journaline entry in the DRM menu (top right). Try…
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@VK2AAK You wrapped the entire id-kiwi-body element with an HTML center tag? If you're going to do stuff like that please confine it to your own HTML and not spill over into the Kiwi HTML 🙄
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What software version? There was a similar bug pre-v1.222 fixed over 4 years ago: https://forum.kiwisdr.com/index.php?p=/discussion/1313/dead-bit-of-the-waterfall-fixed-in-v1-222/p1 Does it affect just your Kiwi or any Kiwis you try on the Internet?…
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I can't believe no one ever complained about this, lol (not surprising I guess given that I spotted it more or less by accident).
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Almost certainly a switching power supply (wall wart et al) from the looks of it. Subtracting two of the harmonics: 3.426 - 3.411 = ~15 kHz. So you'll probably find a huge RFI peak at 15 kHz on the Kiwi and maybe your other SDRs if they go that low.
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The folks at drmrx.org are very active and actually upload the station transmission schedule data used by the Kiwi DRM extension.
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Re: R.Kuwait, More info from the drmrx forum: https://www.drmrx.org/forum/showthread.php?p=101340#post101340
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KTWR DRM schedule: https://drmrx.org/schedules/drmbc.php?id=KTWR%20Asia Note UTC Sat/Sun/Mon only.
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I don't know if this would be easy or not. But one thing I do know: I need help obtaining some recordings of DRM IQ signals containing data (slide shows etc). KTWR transmits during the middle of the night here when I'm sleeping. So it's difficult fo…
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Okay, I see what Chrome is doing. The Kiwi code does a roundtrip keep alive transaction every five seconds. If 30 seconds passes without receiving a keep alive the client (admin page) decides the server or network has disconnected and reloads the pa…
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Being able to use <hostname>.local depends on the Alexa OS (whatever it uses) supporting a network protocol called mDNS. It probably doesn't have this. Does Silk allow you to create a bookmark or "home screen" icon (like an iPhone) w…
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Hi Jimmy, Thanks for your complete and detailed email. It really helps me when people send me the info I ask for. You were correct. There was indeed an error parsing the configuration file kiwi.json We've seen this happen a few times in the past. I…
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Isn't there an ssh available from the command line in Windows? Failing that, try the PuTTY application. So first try ssh root@192.168.1.151 and use the Kiwi serial number as the password (written on the top of the Kiwi circuit board in the white box…
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I looked at the log on the TDoA server. Those kiwirecorder failures were indeed generic "connection failed" errors. Most likely network connectivity problems someplace. Everything seemed to work again after a while. I was able to TDoA usin…