3 ms·

Is not the signal in question modulated by the motion of the source, as most signals in astronomy are?

• ac29 6y ago
  Probably, but I think the post you are responding to is talking about the sort of modulation that artificially alters a radio carrier wave in order to encode information.
  • anonymfus 6y ago
    The post I am responding to suggest calling that signal unmodulated, and I think that would be wrong.