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A comment on Congress wants AM radio in all new cars–trade groups say that’s a mistake. Parent comment

Re:Congress wants AM radio in all new cars–trade groups say ... by icehawk on Tuesday May 23, 2023 @02:46PM (#36048945)
The SNR from an AM radio station at about ~30mi is 13dB and if you plug that into the Shannon capacity calculation for regular 15kHz AM radio (not HD AM) you get about 57kBps at ~100mi, that drops to 4kB/sec.

56K modems also had the advantage that the noise floor for the downstream direction was much lower than the upstream direction.

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