5 ms·

'It's all Beer and Skittles' till 'spurious emissions' interferes with emergency services, aviation, etc.

• jacquesm 4y ago
  Yes, that's the real risk here. Especially if they are using crappy gear, it wouldn't be the first time that a badly designed end stage outputs more at a harmonic than at the principal frequency and your typical FM pirate isn't going to have a spectrum analyzer lying around.
  • News-Dog 4y ago
    'FM pirate-radio-transmitter interferes with aviation communications'
  • dreamcompiler 4y ago
    Which is ironic given that with modern cheap USB-powered SDRs one can build a scanning spectrum analyzer for the FM band for approximately $0. With an expensive SDR (e.g. $300) one can record and play back the entire FM band for a time duration limited only by one's available disk space.
    • jacquesm 4y ago
      You'll want to go a lot higher than your fundamental.
      • sgtnoodle 4y ago
        RTL-SDR goes up to 1.8Ghz. Should be enough to get a pretty good sense of the harmonics?