Re: FM stereo receiver distortion

2020-06-18 Thread Jeff Long
If there's no filter inside "WBFM Receive PLL", place one before it. The example in gr-uhd has a 400 kHz filter there. On Tue, Jun 16, 2020 at 8:46 PM Barry Duggan wrote: > Hi, > > I have a broadcast FM (mono) receiver which works well, with good audio > and clean traces in the Time Domain. See

Re: FM stereo receiver distortion

2020-06-18 Thread Jeff Long
Ah, it's a Python heir block. You could reduce the quadrature rate further so that the quadrature rate is closer to 200 kS/s and/or put a 200 kHz LPF in front of the block. There's internal filtering for the various components of the baseband signal, but no internal filtering before the PLL. It

Project Call June 2020 Today!

2020-06-18 Thread Martin Braun
Hi all, as usual, it's the third Thursday of the month, and we're doing our project call. Join us on IRC, Matrix, or via the Twitch stream: https://twitch.tv/gnuradio The call starts 10 AM Pacific, 1 PM Eastern, 19:00 CEST. Cheers, Martin

Re: Best way to set USRP Sink value from separate thread

2020-06-18 Thread Guy Marino
Hi Marcus, Thank you so much, it's working like a charm now! Best, Guy On Wed, Jun 17, 2020 at 5:59 PM Marcus Müller wrote: > Hi Guy, > > you don#t have to stop a flow graph to set the gain value. In fact, you > shouldn't. > > Yes, you'll still have signal passing through your USRP while

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Marcus D Leech
It may be the case that gr-sigmf hasn’t been converted to gr-3.8 yet. The gr-sigmf folks are on this list as far as I know. Sent from my iPhone > On Jun 18, 2020, at 11:39 AM, Ellie White wrote: > >  > Hi Marcus, > > Thanks so much for the advice, I really appreciate it! So when I tried

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Ellie White
Hi again, all -- Ok, so thanks to Marcus I was able to get through installing gr-sigmf. However, I just attempted to make a flow graph using a sigMF source and unfortunately have hit another roadblock; when I attempt to run the flowgraph (attached; it is not well-developed yet but I was just

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Marcus D. Leech
On 06/18/2020 09:45 AM, Ellie White wrote: Hi again, all -- Ok, so thanks to Marcus I was able to get through installing gr-sigmf. However, I just attempted to make a flow graph using a sigMF source and unfortunately have hit another roadblock; when I attempt to run the flowgraph (attached;

Re: FM stereo receiver distortion

2020-06-18 Thread Marcus D. Leech
On 06/18/2020 07:27 AM, Jeff Long wrote: Ah, it's a Python heir block. You could reduce the quadrature rate further so that the quadrature rate is closer to 200 kS/s and/or put a 200 kHz LPF in front of the block. There's internal filtering for the various components of the baseband signal,

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Ellie White
Hi Marcus, Thanks so much for the advice, I really appreciate it! So when I tried that, it did work, and I was able to run a flowgraph successfully in GNU Radio 3.7, so that's good. In the process of attempting to install some more packages (specifically gr-ata), I found that I needed to upgrade

[announcement] master: SWIG -> Pybind11 (breaks OOT interface)

2020-06-18 Thread Marcus Müller
Hello, most prolific SDR community to wander this wide globe, TL;DR: brace yourself. If you're on master, we'll be breaking your OOT. You don't have to worry about anything if you're using GNU Radio 3.8. We're close to merging the pybind branch into master – and that means we're improving

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Ellie White
RE: the gr-qtgui question -- never mind. Just realized I forgot to install the dependencies, that was silly (https://wiki.gnuradio.org/index.php/UbuntuInstall). Will let you know if gr-sigmf works once I get gnuradio 3.8 installed (given I don’t run into any more snags). Thanks! > On Thu,

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Ellie White
Hi Marcus, Maybe that's the case -- I did notice some comments on the gr-sigmf github page that seemed to indicate maybe it has been (at least partly) upgraded for GNU Radio 3.8. But maybe not for 3.9 -- so I decided to try installing GNU Radio 3.8 instead of 3.9 to test it out. I followed the

Re: GPIO lines on RPi4

2020-06-18 Thread jean-michel.fri...@femto-st.fr
My approach: * build your grc chart from GNU Radio Companion and generate the .py file * edit the py file and import pygpio * play with the RPi4 GPIO in your python script. See attached script, with a python server included in the Python script to control an RF switch from a GNU Octave TCP/IP

Re: GPIO lines on RPi4

2020-06-18 Thread Marcus D. Leech
On 06/18/2020 03:54 PM, jean-michel.fri...@femto-st.fr wrote: My approach: * build your grc chart from GNU Radio Companion and generate the .py file * edit the py file and import pygpio * play with the RPi4 GPIO in your python script. See attached script, with a python server included in the

GPIO lines on RPi4

2020-06-18 Thread Da Fy
Hi All, does anyone have an example of how to control GOIO lines on the RPi4 from within a GRC flowgraph. I’m guessing it’s an OOT module. I need to generate a signal of a few 100Hz & control GPIO lines at various points though the cycle. Alternatively, I could generate the signal & lines

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Ellie White
Hi Marcus, all, Well, seems you’re right that gr-sigmf hasn’t been converted to gr 3.8 yet. Just finished installing gr 3.8, then attempted to run cmake to build gr-sigmf, and that crashed with an error, saying it was looking for gr 3.7 but found gr 3.8 instead. I do need gr 3.8 for the other

Re: Question about cmake error when installing gr-sigmf

2020-06-18 Thread Paul Wicks
Hi Ellie, I'm one of the authors of gr-sigmf. You are correct, we haven't had a chance to port gr-sigmf to 3.8 yet, sorry about that. As for reading sigmf files in 3.8, it depends what you need, if you just need the data portion, you should be able to just use a normal file source with the