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bastibl / gr-rds

FM RDS/TMC Transceiver
http://en.wikipedia.org/wiki/Radio_Data_System
GNU General Public License v3.0
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RDS isn't generated/TEF6686 doesn't show RDS flag #82

Open gabba43 opened 3 hours ago

gabba43 commented 3 hours ago

Hi everyone, first off: Awesome project! I really appreciate your work. My hobby is rf engineering & fm broadcasting and I'm currently trying to build a link receiver and mpx (RDS+stereo) encoder on a Raspberry Pi 2 W or Orange Pi Zero 3.

Now the issue I faced: Your RDS encoder is not working. Tried it on a Linux Mint 12 desktop with a VCO-PLL-tx by PCS Electronics. My 384kHz Realtek sound card is not the issue as it works perfectly fine on the same system using Stereo Tool.

Edit: I'm outputting the generated MPX to the sound card. It's definetely set to 192kHz.

Same on a Win10 machine with Airomate: The sound card does generate proper stereo & RDS.

Tried the branch for GnuRadio 3.9 as well as the new version for GnuRadio 3.10 - no luck. QT Frequency FFT shows a correctly generated 57kHz-RDS-subcarrier & 19kHz stereo pilot. Also, I get a sound output on that sound card in GnuRadio - but no RDS.

Checked everything using my Tef6686 - the RDS flag doesn't light up. When using StereoTool or Airomate, it does immediately.

Do you know what's the issue here? Maybe I made a mistake.

bastibl commented 3 hours ago

Could you please upload the modified TX flowgraph some where please?