Ciao Andrea, not sure if GNURadio is a requisite to you or rather a possible tool to achieve your project. Either way, you can have a look at QSpectrumAnalyzer that is open source and does exactly that. https://github.com/xmikos/qspectrumanalyzer At the very least you can have a look at the way the spectrum chunks are collected.
Cheers Stefano IZ0MJE Il ven 10 dic 2021, 07:06 Kyeong Su Shin <kss...@postech.ac.kr> ha scritto: > Hello Andrea: > > It is possible, but the best practice depends on the SDR source block that > you are using (and also the SDR receiver hardware that you are using). > > For an example, you can treat the center frequency of the SDR source block > as a variable and regularly update that value by using blocks like "Probe > Signal" & "Function Probe" (See the GNU Radio WIki for the details). You > can also write additional "Embedded Python Block"s to orchestrate the > process (again, see the GNU Radio Wiki for the details). This works on most > SDR source blocks. > > The problem of the above method is, however, that it is difficult to know > when exactly the retuning is happening (the hardware will not retune its > frequency immediately upon the request. Internal buffers of GNU Radio is > also a concern). So, you have to make some empirical guesses, and it is > best to be avoided. > > Blocks like "UHD Source" (for USRPs) support more advanced control > features via message and tag interfaces of GNU Radio. With that, you can > control the retuning process more precisely. See: > https://wiki.gnuradio.org/index.php/USRP_Source . The problem is that not > every SDR receiver has such blocks. > > Regards, > Kyeong Su Shin > ------------------------------ > *보낸 사람:* Andrea Valori <aval...@gmail.com> 대신 Discuss-gnuradio > <discuss-gnuradio-bounces+ksshin=postech.ac...@gnu.org> > *보낸 날짜:* 2021년 12월 9일 목요일 오후 11:36 > *받는 사람:* discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org> > *제목:* Wide spectrum sweep > > Dear All, > > I am trying to acquire a wide spectrum (wider than the bandwidth of the > SDR). > This requires a scan over the tuning frequency. Is it possible to obtain > this in a single flowgraph? Possibly even with a GUI? > > I tried to start from this old post, but could not reach a good working > stage... > > https://lists.gnu.org/archive/html/discuss-gnuradio/2018-03/msg00314.html > > Thanks in advance >
