Re: [Discuss-gnuradio] Strange messages from cheetah

Hi Kai - As you found, when running GRC on Mac OS X from MacPorts, a bunch of import warnings are printed. They are harmless, though annoying. Interestingly, those printed for my setup never reference Cheetah; not sure if this is a good or bad thing! Mine instead read the following, which is

Re: [Discuss-gnuradio] Rounding values in QT Number

Well, good news on one front. I just built gnuradio from github on a fresh Linux Mint 18.3 install and the osmocom/rtlsdr stuff seems to work fine. So whatever problem was there has now been cleaned up. Thanks to whoever was responsible for that! Now on to patching QT Number sink... John

[Discuss-gnuradio] Strange messages from cheetah

Hi, since a few days, I get a lot of these messages when starting grc; gnuradio version v3.7-MacPorts-devel-git-47f86bce(20180302). Flowgraphs seem to work though…this still sounds disturbing. Any suggestions how to get rid of them? Best regards, kai Loading:

Re: [Discuss-gnuradio] Gnuradio differences between mac and linux operation.

Re: [Discuss-gnuradio] GSoC 2018 - DTV User Front-End

Hi Valian, great to hear from you! Well, Tkinter won't be of much help (we don't want to introduce yet another GUI framework), but your experience in working with GUIs would be of help. For other GUI Frameworks, aim for Qt5 / PyQt5. So, the real issue here is that the RTL dongles simply aren't

Re: [Discuss-gnuradio] WBFM decoding flowgraph: Audio terminates when tuning

I doubt you've missed something basic! I don't know what I'm doing! I followed Brian's suggestions - but then also changed to 24khz audio out to see if that would help. So a decimate by 2 and then 20, so 960khz / 40 = 24khz. I should also mention that I have poor reliability with limesdr. It

Re: [Discuss-gnuradio] Gnuradio differences between mac and linux operation.

On 03/06/2018 10:32 AM, Langston, Glen wrote: Dear Marcus, Thanks for your efforts on spectra_radiometer. I’m still pursuing the issues with alias spectra and linux, but I did see the same alias problem with spectro_radiometer under linux. I’ll download the latest version spectro_radiometer

Re: [Discuss-gnuradio] WBFM decoding flowgraph: Audio terminates when tuning

Hi Matt, Perhaps I'm missing something very basic, but I fail to see how you reached the numbers for the sample rates. They look wrong to me. 1 Msps -> decimation by 4 -> 960 Ksps? Regarding performance, I'd say some optimization is required for better performance. I was able to demodulate WFM

[Discuss-gnuradio] GSoC 2018 - DTV User Front-End

Greetings, I looked up through the ideas list for GSoC 2018, and I am interested in the DTV Front-End project. I am experienced in using Tkinter for GUI programming in Python, and I have a friend which has an RTL USB dongle which I might be able to use for experimenting. What other GUI tool might

Re: [Discuss-gnuradio] Rounding values in QT Number

I must now reflect and ponder to wisely choose my path. All options suck. I'd actually like most to go back to the build-gnuradio script but I haven't been able to verify that the issue I had last summer was addressed -- I don't know what broke or where, but with changes to librtlsdr around

Re: [Discuss-gnuradio] Rounding values in QT Number

Indeed, I was misjudging the syntax of QString.arg(double, int); the second thing is just a minimal width to be filled up with spaces. The optional precision argument is never specified, so Qt just does whatever the hell it feels like. Splendid functionality. Regarding moving things out-of-tree:

Re: [Discuss-gnuradio] Rounding values in QT Number

Thanks, Marcus! First, there's something goofy because I am getting 6 decimal places, not 4. See the attached screen shot. Second, unfortunately at the moment I'm using the Ubuntu packages. I used to always use the build-gnuradio script, but last summer I started having problems with

Re: [Discuss-gnuradio] Calculate signal deviation in gnuradio

You can definitely do that! In fact, it's pretty easy. Really, read the tutorials I've linked to, and you'll quickly get an idea what to do when you want a moving average of the power of a signal (namely, convert it to it's magnitude², then apply a moving average), and once you have that, it's

Re: [Discuss-gnuradio] Calculate signal deviation in gnuradio

Marcus, Sorry for confusion, language problem. I would like to calculate first and second statistical moments (mean and variance) for received signal level. Regards, Roman On Tuesday, March 6, 2018, Müller, Marcus (CEL) wrote: > Hi Roman, > > probably, it's possible, but I

Re: [Discuss-gnuradio] Rounding values in QT Number

Hi John, there's no dumb questions, maybe badly researched ones, and you definitely don't have the habit of posting the latter, so: Good question! It all boils down to this line in gnuradio/gr- qtgui/lib/numberdisplayform.cc: d_text_box[i]->setText(QString("%1 %2").arg(f, 4, ' ').\

Re: [Discuss-gnuradio] Calculate signal deviation in gnuradio

Hi Roman, probably, it's possible, but I have no idea what you mean with "signal deviation". Maybe you could elaborate? To give you a quick look into what GNU Radio can do for you: see https: //tutorials.gnuradio.org Happy signal processing, Marcus On Tue, 2018-03-06 at 08:50 +0300, Roman

Re: [Discuss-gnuradio] control port problem with incorrect throttle rate

Thanks, Jeff! I did your experiment and figured out that the setKnobs I do to test for settability hits the throttle and apparently resets it, even if there is no change. I added an additional command line argument to tell the script whether to check settability and then only do that the first