I tried your grc and got the same result. See the waveform's envelope in this oscilloscope capture. Note the timebase. https://drive.google.com/file/d/1b7PnpmvFfdQTDIwALuOzb22AzeffzR2w/view?usp=sharing
This isn't happening in SDRAngel. On Thu, Mar 18, 2021 at 3:49 AM Cinaed Simson <cinaed.sim...@gmail.com> wrote: > I moved the rational resampler block from the output side to the input > side of the WBFM. > > The output of WBFM block needs to match the input of your LimeSDR. > > I don't have the LimeSDR software installed so I couldn't look inside the > sink block. > > -- Cinaed > > P.S - yes, you can post GRC's on the mailing list - they're text based. > > > On 3/17/21 4:14 AM, Anish Mangal wrote: > > I linked > <https://drive.google.com/file/d/1xQz1Kp_feAO1YrZRXXnMF25XEGgqVPSw/view?usp=sharing> > the grc file in the original email. Attaching it here as well. (Don't know > if the mailing list allows attachments) > > > > On Wed, Mar 17, 2021 at 1:40 PM Cinaed Simson <cinaed.sim...@gmail.com> > wrote: > >> >> Hi Anish - since this is a gnuradio mailing list, the starting point >> would be to post your GRC - which is an yaml or text file. >> >> -- Cinaed >> >> On 3/16/21 11:19 PM, Anish Mangal wrote: >> >> Hi! Any pointers to where I can start debugging this? >> >> Maybe run gnuradio-companion in debug mode? >> Do more simpler tests? >> Any other suggestions? >> >> I have a HackRF One and will try the exact same comparison there too ... >> SDRAngel & grc >> >> On Mon, Mar 15, 2021 at 7:32 PM Anish Mangal <anis...@umich.edu> wrote: >> >>> Hi, >>> >>> To properly explain the issue I'm facing, I recorded a video showing >>> Oscilloscope waveforms. >>> >>> >>> https://drive.google.com/file/d/11anGShu-I3NhL9Jet6YAiyBprvwP4kDc/view?usp=sharing >>> >>> The gnuradio flowgraph is here: >>> >>> https://drive.google.com/file/d/1xQz1Kp_feAO1YrZRXXnMF25XEGgqVPSw/view?usp=sharing >>> >>> The various versions of the software/hardware involved are the >>> following. >>> >>> gnuradio-companion: 3.8.2.0 (Python 3.6.9) >>> gr-limesdr: branch gr-3.8 (last commit >>> 47511dd58de1695b70e1028366411bada85eb60f) >>> sdrangel: 4.12.1 >>> OS: Linux Mint 19.1 >>> CPU: Intel© Core™ i7-4900MQ CPU @ 2.80GHz × 4 >>> RAM: 16GB >>> H/w: Thinkpad T440p >>> >>> tl;dr >>> I'm trying a simple test to create a sinewave output from a WFM >>> modulator block. If there is no audio input, its WFM modulated signal >>> should be a simple sinewave. If I test this with SDRAngel, I see a >>> clean-ish actual sinewave in time domain on the oscilloscope. But if I try >>> to do the same with gnuradio, it seems to produce a glitchy signal. >>> >>> Could I have any advice on what I might be doing wrong? >>> >>> Thanks, >>> Anish // VU2TVE >>> >> >> >
