[Elecraft] Zero-beating a KX1

[Andy Durbin]

Ref the linked article - "you slowly tune the received signal until it reaches the magic tone that means "zero-beat". Usually, this is the same tone as your CW sidetone, 500-800 Hz, depending on your rig. You need a good ear for pitch."

Has everyone forgotten what to "zero beat" means or is it simply that the term has become so abused that it means something different now.   Zero beat used to mean to shift the frequency of one signal relative to the frequency of another signal until the audible beat frequency reduced to zero.   In those olden days, using an AM receiver to receive CW, the technique I remember was to set the BFO (Beat frequency Oscillator) to zero offset, tune the signal for zero beat, then adjust the BFO offset for desired pitch.

How can tuning a single frequency to desired pitch be zero beating.  There is no beat frequency to zero.

Andy, k3wyc