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The article doesn't really answer why. It basically says that FM is channelized first and then the center frequencies are determined; while AM is assigned cente

The article doesn't really answer why. It basically says that FM is channelized first and then the center frequencies are determined; while AM is assigned center frequencies first. But why are AM and FM different here?

gpvos 6y ago
History. Just what the regulators fancied at the moment it was standardized.
wl 6y ago
Mediumwave AM broadcast uses the center frequency as the channel identifier, same as FM.
- gpvos 6y ago
  FM channel numbers didn't really catch on, but I do remember that they were a small thing.