I have recently seen an article about an unusual radio signal coming from Proxima Centauri region. I understand there is a debate around the nature of this signal. My question is related to this paragraph:
“The very narrow frequency of the signal (982 MHz) suggests a technological source, but that particular band of the spectrum isn’t one usually associated with human transmissions, satellites or other spacecraft.”
Why do they say 982 MHZ is a technological source?
How is it relevant for a potential alien transmission, the fact that this band is not what humans use for satellites, spacecrafts..etc