The following screenshot shows the CW spectrum
of the 40m amateur radio band. The waterfall display shows very clearly the sequenze
of Morse code signals.
Medium wave reception of an AM-modulated
Automatic synchronous reception:
Regardless from precise frequency tuning to the center frequency the audible demodulated
AM signal refers automatically to the carrier center frequency as long as it is
situated in the passband of the IF filter (chosen example = 6KHz) as can be seen