MODULATION CONVERTER HAVING PRE-MODULATED INPUT (E.G., FM TOAM):
(under the class definition) Subject matter in which the input to a system is a repetitious electrical wave which has had a characteristic varied in accordance with a modulating signal, and in which the output of the system is a repetitious electrical wave having a different characteristic varied.
(1) Note. This subclass excludes systems whose outputs are pulse code modulated (PCM) or delta modulated. Such systems are found in Class 341 subclasses 126+ and 143.
(2) Note. This subclass excludes systems having a plurality of diverse type modulators wherein the input of a first modulator is an intelligence and the output of this modulator forms the input of a second modulator whose output is a different form of modulation from its input. Such systems are found in subclasses 108, 119+, 145, and 151+, where the final output is pulse, frequency, phase or amplitude modulated, respectively.
(3) Note. The combination of subject matter of this
subclass with a subsequent demodulator is classified in Class 329.
SEE OR SEARCH CLASS
455, Telecommunications, appropriate subclasses, for diverse-type conversion in a telecommunication transmitter or receiver.
