Sidebands
Nope, you haven't the slightest bit of understanding of what the term
"passband" means so your question is nonsense.
"Radio receivers generally include a tunable band-pass filter with a
passband that is wide enough to accommodate the bandwidth of the radio
signal transmitted by a single station."
That statement is at best misleading, and in some cases incorrect.
In most receivers any *tunable* filter is MUCH MUCH wider than the
bandwidth required to accommodate the bandwidth of the signal transmitted.
The selectivity being produced by one or more *fixed* frequency filters
which are just wide enough to accommodate the bandwidth of the wanted
signal.
For me a radio is a box with the knob to rotate.
Now at FM no brakes between stations. At AM are.
What was in 1915?
S*
In 1915 there were no broadcast stations to speak of so your dial
would be just one large "brake" (sic).
Jeff
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