电视同步脉冲 television synchronizing pulse
- 将振荡器的自由振荡频率设置得略低于水平和垂直(扫描)脉冲频率,剥离出来的脉冲用于提前触发振荡器从而使振荡器与行频和半帧频同步(由于美国电视在交替的垂直扫描时进行隔行扫描,所以是半帧频)。
Free-running frequencies of the oscillators are set slightly below the horizontal and vertical pulse rates, and the stripped pulses are used to trigger the oscillators prematurely and thus to synchronize them to the line and half-frame rates (half-frame because United States television interlaces the lines on alternate vertical scans).