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(newbie question) How can I search for DRM stations in a KiwiSDR share?
Hello
I am completely new to KiwiSDR and SDR in general
I would like to do a few experiments first before purchasing a KiwiSDR
I want to listen to a few DRM stations from one of the shared KiwiSDR sites
I already know how to use a Virtual Audio Cable to send the output audio from browser displaying the the shared KiwiSDR site to Dream decoder (https://hobbyradio.se/en/drm/kiwisdr.html)
I know how to load a shared KiwiSDR from the KiwiSDR list (https://sdr.hu/) and map (https://sdr.hu/map) sites
However I am more interested in DRM, and I would like to tune into a DRM station from one of the shared KiwiSDR's and listen to it on Dream
I have been searching for hours but I have not been able to find any DRM stations
Is there any easy way to search for DRM broadcasts, or does any one here have a link to a shared KiwiSDR that is definitely receiving DRM broadcasts?
So far, I have found out from here (http://kiwisdr.com/quickstart/#id-faq-drm) that DRM signals show up as a particular pattern on the spectrum view and the waterfall
However, I have been searching for hours, especially in KiwiSDR's from countries such as UK and India where I believe the government itself is promoting DRM adoption, but I haven't been able to find any
Is there an easy way to find DRM broadcasts, or can someone link me to one please? I want to send the DRM audio output from the browser to Dream through a virtual cable and listen to the decoded audio signal in my speaker.
I am completely new to KiwiSDR and SDR in general
I would like to do a few experiments first before purchasing a KiwiSDR
I want to listen to a few DRM stations from one of the shared KiwiSDR sites
I already know how to use a Virtual Audio Cable to send the output audio from browser displaying the the shared KiwiSDR site to Dream decoder (https://hobbyradio.se/en/drm/kiwisdr.html)
I know how to load a shared KiwiSDR from the KiwiSDR list (https://sdr.hu/) and map (https://sdr.hu/map) sites
However I am more interested in DRM, and I would like to tune into a DRM station from one of the shared KiwiSDR's and listen to it on Dream
I have been searching for hours but I have not been able to find any DRM stations
Is there any easy way to search for DRM broadcasts, or does any one here have a link to a shared KiwiSDR that is definitely receiving DRM broadcasts?
So far, I have found out from here (http://kiwisdr.com/quickstart/#id-faq-drm) that DRM signals show up as a particular pattern on the spectrum view and the waterfall
However, I have been searching for hours, especially in KiwiSDR's from countries such as UK and India where I believe the government itself is promoting DRM adoption, but I haven't been able to find any
Is there an easy way to find DRM broadcasts, or can someone link me to one please? I want to send the DRM audio output from the browser to Dream through a virtual cable and listen to the decoded audio signal in my speaker.
Comments
I am decoding DRM successfully there.
best regards, Ben
I had a look at http://swloi33.proxy.kiwisdr.com:8073/?f=13825.00iqz7
I am attaching my screenshots as well
The waterfall pattern looks like DRM pattern mentioned in KiwiSDR's website as well (http://kiwisdr.com/quickstart/#id-faq-drm)
I have diverted the browser output to Virtual cable, and I am using Virtual cable as input to Dream, and speaker as output of Dream
I cannot get any output at all
Could someone tell me what I am doing wrong please?
(I found the Kuwait SDR (there was only one) but couldn't get anything on it, and by the time I visited http://swloi33.proxy.kiwisdr.com:8073/?f=11970.00iqz8 the DRM broadcast seems to have stopped)
You can try my KiWi
http://southwest.ddns.net:8073//?f=3964.9
which is the French RFI broadcast on 3965KHz and is usually fairly consistent. I use the full 12KHz I/Q bandwidth.
I'm listening to this at the moment, but the signal level is varying and I'm only hearing audio for about 30% of the time, however this may improve later today as propagation changes.
You may also like to try Sodira http://dsp4swls.de/indexeng.html which occasionally works better than Dream and can provide further diagnostic info.
Regards,
Martin - G8JNJ
http://sdr.loginto.me:8074/?f=3964.90iqz12
Regards,
Martin - G8JNJ
Because I use a Mac I'm forced to use Dream 1.11 so I can only tell you what I do to configure. Dream 2.1 (or whatever) on Windows might be different (can anyone clarify?) On Mac I start Dream from the command line. If you do "(dream) -h" it shows a complete list of options. I use "(dream) -I 1 -c 5". The "-I 1" selects my VAC as sound-in device. The "-c 5" selects the "I/Q input positive (0 Hz IF)" mode.
Ron
KA7U
I used @jks's suggestion and lauched Dream from command line and start it with the option I / Q input positive (0 Hz IF) [this is dream -c 6 in Dream 2.1.1 for Windows) and it is decoding properly without having to fiddle with the volume controls on the KiwiSDR website
The link is http://southwest.ddns.net:8073//?f=3964.9 suggested by @G8JNJ
In general I'm kind of surprised DRM doesn't perform better on HF than it does. It's almost like the broadcasters are sacrificing extra error correction, that's really needed on HF, for sound quality. Running it like they would on MWBC for local reception. And the result is lots of dropouts on HF. But I'm really unqualified to be talking about such things. Any experts out there?
Bjarne Mjelde
Ron
KA7U