Software Defined Radio (SDR/RTLSDR)

Yeah… it’s certainly a learning curve & no manual provided either for SDR#. ‘SDR Console’ provides help videos & online help. I’m still learning years on. You have to be a bit techy, nerdy or geeky or all of the above to want to or to have the patience to get into this. I marvel at the coders who burn away their hours creating this software & the engineers who create the radio hardware & code.

One has to play, experiment & study to learn about this stuff. It doesn’t happen overnight. Fortunately in this modern era we have easy access to people, forums to help us & youtube videos so we can learn & do things ourselves that we never dreamt of attempting decades ago :slight_smile:

Yeah a simple radio is easy. But SDR tech, which has been around for a long while now & continues to improve adds a huge amount of fun & power to ones fingertips. What one can do with SDR software to improve signals & reduce or eliminate interference in some cases is simply amazing.

And you’re right it’s a way to burn a lot of your free time, but lets face it computers have been doing that to our lives for a long while now. That said, not too many in the under 60 year group who want a life free of computers or at least a smartphone these days.

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That one seems to come into its own at night, when distant AM signals can be received.

Of course not too much exciting programming wise, but at least there’s still different ad breaks and station IDs, etc. Interestingly the network feed on 2GF 1206AM seems to be a second or two ahead of the one from 2SM 1269AM - is that because the Sydney station is running an analogue simulcast of the DAB+ channel or something?

Listened to a little bit of that yesterday. Would’ve been nice if there was remote FM radio from that region too (haven’t heard Max 1073 in a while now), although at least being able to hear some of the local drive program on 2RE was good!

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Listening to Magic Music FM on 100.6 FM in Auckland. I wish we had an oldies station like this on FM in Sydney. The closest thing is perhaps Smooth FM.

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I agree. For the record, Magic Music is available on FM across much of NZ.

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Good evening all. How is DAB transmitted? Are each station sent as part one of “Transport Stream” per network? Or are they all sent as the one Transport Stream?

The more I see your posts @tvcl , the more I want to get my setup even just with a simple rabbit ears. :slight_smile: My two different USB sticks don’t work. Got one of these.

Plus one of these ;

http://www.digitalnow.com.au/product_pages/Dabby.html

Played around with drivers, no luck. Did not want to mess up my DAB radio though as I do listen to it.

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The one you have pictured should work fine as an SDR if you install the Zadig WinUSB driver. In fact, I have several of the same dongle as you’ve pictured and have used them successfully as an SDR.

Thanks! Does it sacrifice the DAB software from working or does it work for both? It just seems strange it works well with the DAB player and FM Radio. You would think they would share the same driver :slight_smile:.

Screenshot for the FM Radio.

Hi Laoma. You will need to switch back/forth between the drivers for SDR function vs regular DAB+/DVB-T function.

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Oh ok… I understand! I think it may auto install in Windows 10. I will keep playing. I got another PC I should try it out there.

You don’t get 2LT on 101.1 at your location?

Not well. I live in an apartment block so not the best for reception.

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That’s a reasonable signal for 2LT. But then again I’m a DXer, so can tolerate more than a bit of static on the signal :smiley:

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@tvcl still had driver issues when using SDL software. I think windows 10 auto detects it. I wonder if I need to buy a new one. It would be great to have one USB stick that could cover AM and FM.

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The SDRplay RSP1A covers both from 1 kHz to 2 GHz, so it should do both AM and FM. An antenna that covers both well might be an issue though.

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I’m trying to figure out if my RTLSDR sticks are bad or I’m on an odd MATV because I don’t seem to get any Central Coast stations, in fact I get 2DayFM on 107.8. I also get Triple M on 107.05.


Any ideas what might cause this? Do I need to move to a different antenna?

101.3 and 104.5 has nothing.

I can get 97.5 97.3 and 98.1 from the Illawarra.

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A couple of thoughts.

  1. Try the RTL-SDR connected directly to a simple dipole antenna wire (like the type that comes with HiFi tuners etc) without amplifier & attach with some blu-tak to window etc.
    AND
  2. Try maximizing GAIN control in SDR# for maximum SNR, the level for maximum signal, but just before where the spurious signals/overload occurs & seen on the FFT.
    Choose antenna location wisely.

These cheapo RTL-SDR’s badly overload.

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As ozbark mentioned, these aren’t real signals – just false images when the receiver is overloaded with strong signals.

If it’s connected to the TV antenna, some amplifiers and/or antennas filter out FM signals deliberately to avoid potential interference to TV signals.

There’s no 97.5 in the Illawarra, so that’s probably another false signal.

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I think @Petarkco was meant to be referring 96.5 there. :slight_smile:

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I’ll have to pick one up, I don’t have any on hand.

12.5 db seems to be the limit before the high powered stations jump on top of lower signal stations.

I’m using the RTL-SDR Blog V3 dongle so I expect it should be okay.

Yes 96.5 image