I wonder if ANY commercial/military HF users require the kind of close-in
dynamic range that we do. If you have a choice, why would you design a
communications system that allows signals within 2 kHz of each other with a 140
dB difference in amplitude? Only the relative anarchy of the ham
Hello Georges,
Thanks for your informative message and I like to read it.
You are right. Pofessional radios employ up conversion scheme and wide roofing
filter.
Of course, they have other expensive measures to ensure good 2Khz dynamic range.
For the insitutional users, they would use both
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