MEASURING DEVICE - ソニー株式会社

Title:

MEASURING DEVICE

Document Type and Number:

Japanese Patent JP3158299

Kind Code:

B2

Abstract:

PURPOSE: To facilitate the measurement of the phase difference between the commercial power waveform and the video signal waveform of a power synchro nizing camera which uses the commercial frequency as the vertical synchronizing frequency.
CONSTITUTION: The commercial power waveform CW to be observed by an oscilloscope 10 is defined as the waveform of a secondary coil 13b of an insulated transformer 13. Therefore a ground input terminal 11 of the oscilloscope 10 is never fluctuated by the commercial frequency and the power hum component is never mixed into a vertical synchronizing signal waveform. As a result, the synchronization of a video signal waveform VW is easily secured through the oscilloscope 10 and an easy-to-see waveform VW is obtained. Then the phases of the waveform CW and the vertical synchronizing signal waveform contained in the waveform VW can be easily measured.

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Inventors:

Katsumi Osawa

Application Number:

JP1535592A

Publication Date:

April 23, 2001

Filing Date:

January 30, 1992

Export Citation:

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Assignee:

ソニー株式会社

International Classes:

H04N5/04; G01R25/00; H04N5/067; H04N5/232; H04N17/00; (IPC1-7): H04N17/00; H04N5/04

Attorney, Agent or Firm:

Hidemori Matsukuma

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