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As well as I know, the tradition was that broadband use used for the 6MHz wide TV channels, compared to the much narrower channels needed for AM or FM radio. There are complication in the IF strips for 6MHz bandwidth that aren't there for narrower signals. Then, not so long after the beginnings of Ethernet, there was 10broad36, which uses 6MHz TV channels on a cable TV system for Ethernet signaling. Later, the technology was extended to DOCSIS, but not all that much different. I believe it still uses the same 6MHz TV channels, but now more than one of them. In any case, it is supposed to be related to the 6MHz or so wide channel. This should be somewhere in Wikipedia, if not here. Gah4 (talk) 04:26, 2 May 2023 (UTC)[reply]