Patent ID: 6484316
Filing Date: 2002-11-19
Classification: H04H

Abstract:
A signal strength metering device for use in positioning a magnetic pick-up device that receives signals radiated from a television set, said signal strength metering device comprising:a synchronizing signal processing section including a first filter, a first peak amplitude detection circuit, a first edge detection circuit, and a one-shot circuit, said synchronizing signal processing section receiving a vertical synchronizing signal, and said one-shot outputting a blanking signal upon receipt of a first voltage signal from said first edge detection circuit, said first voltage signal being representative of a peak amplitude of said vertical synchronization signal; a first audio signal processing circuit including a second filter, a second peak amplitude detection circuit and a second edge detection circuit, said first audio signal processing circuit receiving an audio signal from said television set and said blanking signal, and outputting a second voltage representative of a peak amplitude of said audio signal and a first square wave representation of said audio signal; a second audio signal processing circuit including a blanking circuit and a third edge detector, said second audio signal processing circuit receiving a test audio signal and outputting a second square wave representative of said test audio signal; and a controller, said controller receiving said second voltage signal representative of said peak amplitude of said audio signal, said first square wave and said second square wave, wherein said controller determines at least one of a quality of said vertical synchronizing signal, a level of said audio signal, a phase of said audio signal, and an audio noise floor measurement.