| 摘要 |
A signal strength meter for use in determining an optimal position of a magnetic pick-up device. The signal strength meter includes a vertical synchronization processing circuit, and audio processing circuit and a power and control circuit. The signal strength meter receives vertical synchronization and audio signals radiated from a television set, as well as an audio test signal directly provided by a pattern generator. The signal strength meter determines parameters such as a phase stability of the vertical synchronization signal detected by the pick-up device, a level of the audio signal detected by the pick-up device, and audio phase measurement of the audio signal sensed by the pick-up device with respect to an audio test signal input directly to the signal strength meter, and an audio noise floor measurement.
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