User Tools

Site Tools


Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
mission:log:2014:08:08:darc-side-of-munich-hunting-fm-broadcasts-for-bus-and-tram-display-information-on-90-mhz [2015/05/22 09:18]
chrono [Broadcast FM Primer]
mission:log:2014:08:08:darc-side-of-munich-hunting-fm-broadcasts-for-bus-and-tram-display-information-on-90-mhz [2016/04/13 06:36] (current)
chrono [Broadcast FM Primer]
Line 94: Line 94:
 **Stereo Difference Signal** **Stereo Difference Signal**
  
-The stereo difference signal (L−R) is modulated onto a 38 kHz double-sideband suppressed-carrier (DSB-SC) signal occupying the baseband range of 23 to 53 kHz. A 19 kHz pilot tone, at exactly half the 38 kHz sub-carrier frequency and with a precise phase relationship to it, is also generated. This is transmitted at 8–10% of overall modulation level and used by the receiver to regenerate the 38 kHz sub-carrier with the correct phase.+The stereo difference signal (L−R) is modulated onto a 38 kHz double-sideband suppressed-carrier (DSB-SC) signal occupying the baseband range of 23 to 53 kHz. 
  
 **RDS** **RDS**
Line 159: Line 159:
 <WRAP round download> <WRAP round download>
 **Download DARC-Hunter.grc File:**\\ **Download DARC-Hunter.grc File:**\\
-coming after cleanup+[[https://apollo.open-resource.org/downloads/darc-hunter-mk5.grc|darc-hunter-mk5.grc]]
 </WRAP> </WRAP>
 ==== Negative reference stereo FM station ==== ==== Negative reference stereo FM station ====
Line 304: Line 304:
 ===== Updates ===== ===== Updates =====
  
-[[https://github.com/muccc/darc|DARC GNU Radio Block Implementation]] by chris007 & andz - presented at [[https://eh15.easterhegg.eu/frab/en/eh15/public/events/2|EH2015]]+  * [[https://github.com/muccc/darc|DARC GNU Radio Block Implementation]] by chris007 & andz - presented at [[https://eh15.easterhegg.eu/frab/en/eh15/public/events/2|EH2015]] 
 +  * [[mission:log:2016:04:12:the-darc-knight-rises]]
  
 {{tag>darc rf sdr rtl-sdr hackrf gnuradio grc bus tram software hacking munich mvg research radio antenna}} {{tag>darc rf sdr rtl-sdr hackrf gnuradio grc bus tram software hacking munich mvg research radio antenna}}