Sat Oct 21, 2017 8:23 am
#1566698
Simplistically, AIUI, a channel is a nominal exact radio frequency plus the band of adjacent exact frequencies deemed to 'belong exclusively' to that frequency. Comprehensible human speech requires about 3.8 KHz of protected bandwidth, so an adjacent nominal frequency should be at least that far away, preferably a bit more. Significantly less bandwidth is needed for Morse or single channel printer. For data, bandwidth requirements rise proportionately with data rates.
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