.~.~ With modification of frequencies of analog signal passed (e.g., pre-emphasis and de-emphasis)
DEFINITION
Classification: 455/43
With modification of frequencies of analog signal passed (e.g., pre-emphasis or de-emphasis):
(under subclass 42) Subject matter where the information or modulating signal is predistorted and/or preamplified prior to its modulation of the carrier wave.
SEE OR SEARCH CLASS
332, Modulators,
123+, for frequency modulators, per se, with distortion introduction or control, e.g., pre-emphasis networks.