So I know that AM radio transmission are single-side band carrier suppressed. But which sideband is transmitted?
the reason i ask is because i have just done an experiment with a superheterodyne receiver, the final stage of which used an envelope detector. The system used one IF and used High side injection. As far as i can tell, that would cause spectrum inversion right? I could hear the station, so if the LSB were transmitted, that would make sense.
The real puzzler is at the end of the experiment, the radio was configured as a 'crystal set' (ie with no LO or mixer) and the channel was still demodulated properly.
so is spectrum inversion something that does not apply with envelope-detector type demodulators? or is there a hidden step that inverts the spectrum again that I'm not seeing?
the reason i ask is because i have just done an experiment with a superheterodyne receiver, the final stage of which used an envelope detector. The system used one IF and used High side injection. As far as i can tell, that would cause spectrum inversion right? I could hear the station, so if the LSB were transmitted, that would make sense.
The real puzzler is at the end of the experiment, the radio was configured as a 'crystal set' (ie with no LO or mixer) and the channel was still demodulated properly.
so is spectrum inversion something that does not apply with envelope-detector type demodulators? or is there a hidden step that inverts the spectrum again that I'm not seeing?