GB/T 7402-1987
AbolishedTime and frequncy dissemination via television signals
利用电视信号传送标准时间频率
Application Summary AI generated
This standard specifies the method for disseminating standard time and frequency signals by inserting them into the vertical blanking interval of analog television broadcasts. It is applied in China for synchronizing time and frequency across broadcast networks, telecommunications infrastructure, and industrial systems that require precise timing without dedicated satellite receivers. The standard ensures that television stations and end-user equipment can recover accurate time references from the broadcast signal for calibration and coordination purposes.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.