And, if I try the attach gnuradio file, which is just a constant source of value '1' going to the limesdr sink block, I actually see a sine-ish wave without the glitchy behavior.
On Thu, Mar 18, 2021 at 5:31 PM Anish Mangal <anis...@umich.edu> wrote: > 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 >>>> >>> >>> >>
my_limesdr-const-source.grc
Description: Binary data
