Using a particular modulation (e.g., phase, frequency, or amplitude):
(under subclass 870.01) Subject matter wherein the characteristic of a wave (carrier) is modified so that it varies with the instantaneous value of the quantity telemetered (modulating wave).
SEE OR SEARCH THIS CLASS, SUBCLASS:
870.25, for phase variation without specific modulation.
870.26, for frequency variation without specific modulation.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems, appropriate subclasses for systems in electrical transmission or interconnection that use modulation.
323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for systems in electricity, voltage magnitude, and phase control that use modulation. 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
100+, for miscellaneous circuits that modify input signal parameters such as frequency, phase, and amplitude.
332, Modulators, appropriate subclasses for modulation, per se, unless particularly adapted to telemetering.
