INSTRUMENT WHICH HETERODYNE

Brand	Owner	Address	Description
SONALATOR	KAY ELECTRIC COMPANY	14 MAPLE AVENUE PINE BROOK NJ	INSTRUMENT WHICH IS A HETERODYNE TYPE ANALYZER AND PROVIDES AN IMMEDIATELY AVAILABLE VISUAL DISPLAY OF THE FREQUENCY COMPONENTS IN COMPLEX AUDIO WAVE FORMS AND IS USEFUL TO INDICATE THE COMPOSITION OF VIBRATION AND NOISE SIGNALS AND OTHER USES;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

An optical communications system includes a receiver subsystem with at least two heterodyne receivers. The receiver subsystem receives a composite optical signal having two or more subbands of information and corresponding tones. An optical splitter splits the composite optical signal into optical signals. Each optical signal includes a subband(s) and corresponding tone. Each heterodyne receiver receives an optical signal. The receiver includes a heterodyne detector coupled to a signal extractor. The heterodyne detector mixes the optical signal with an optical local oscillator to produce an electrical signal which includes a frequency down-shifted version of the subband and the tone of the optical signal. The signal extractor mixes the frequency down-shifted subband with the frequency down-shifted tone to produce a frequency component containing the information.