This is the most user-friendly option so far. It will install the entire gnu-radio suit, which is lots of fun! There are a couple of ways to capture data and transfer it into Matlab. Then, reading the data from a file into Matlab. I've written several matlab functions that can be used to interact with the device directly from Matlab. Unfortunately these do not work in GNU octave as they use Matlab built-in java interpreter.
I will release GNU octave code soon. It contains all the code to work with the device from Matlab. You will see that the samples are complex! This is because the device uses IQ baseband demodulation and sampling to represent a single side of the spectrum.
Here are some Notes and Slides about Quadrature demodulation and sampling. Because of the automatic gain, in many cases the first couple of seconds of capture will not be useful. You should therefore discard them. An alternative is to use manual gain, but you have to be careful not to overrange when the signal is strong. The Supported gain values 18 : From Matlab it is possible to change these. Example: to start a tcp erver with default parameters of tuning to This is a photo of the dongle: The E Elonics chip is a digitally controlled tuner.
Page generated PST, by jemdoc. Run the Zadig. Warning… the file will grow very quickly! Example: to tune to To change frequency to The solution was to edit the environment variable 'Path' and set 'python27' in front of 'python33'. Regards, Rudolf. This is an excellent application; specifically it does exactly what it claims to do whereas the commercial program, Touchstone Pro, is seriously broken.
I did have installation problems and it took a lot of effort to get around that, but the author was helpful. I got into this low-cost spectrum analyzer thing because a client of mine wants to reduce the EMI electro-magnetic interference from a product I designed. He did not fund an EMI study in the first place and is reluctant to spend money now on equipment, but I hate just guessing so I'm trying to put together a simple EMI evaluation setup on my own nickel. To cut a long story short, Touchstone Pro is making some bad mistakes in the signal processing and the output spectrum is polluted by artifacts that are not actual input signals.
I can also see the radio stations in the FM broadcast band and there's nothing I can do about that without a radio-proof room. Otherwise, what I'm seeing makes sense in terms of the experiments I'm carrying out, which wasn't the case with Touchstone Pro. RTLSDR Scanner is under active development and it has a few rough edges that I won't go into because they'll probably be fixed by the time anyone reads this. Its basic feature set is pretty much what I need, plus stuff that I don't need but you might.
If you decide to buy a dongle and try this out, note that scanning and producing a spectrum is slow. Same thing with the lower and upper frequency limits. If you want anything much better than this you're going to have to spend about 1, bucks, so keep that in mind. I'll be sending the author 50 bucks, about what I wasted on Touchstone Pro, and I suggest you do the same.
The world needs software like this. I like this app, I just wish it had the ability to set the range to sub-Mhz. For example I'd like to be able to scan
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