Vertical frequency. The vertical sc

Vertical frequency. The vertical scanning frequency is also changed slightly since there must be 262. 5 lines per field. Then the vertical field-scanning frequency is
The slight difference of 0. 06 Hz below 60 Hz has practically no effect on vertical scanning and sync in the receiver, because an oscillator that can be triggered by 60-1 cycle pulses can also be synchronized by 59. 94-Hz Pulses. It should be noted that when the scanning frequencies are shifted slightly for color television, the transmitted sync is also
changed to the new frequencies for # and $
Color frequency. With the horizontal line-scanning frequency chosen ,now the color subcarrier can be determined .This value is made to be the 455th harmonic of $/2:
To obtain this exact frequency, the color oscillator is
crystal-controlled. A typical quartz crystal unit is shown in Fig.5- 20. The multiple of 455 is chosen as an odd number that makes C close to 358 MHz

結果 (中文) 1:

垂直频率。垂直扫描频率也是略有改变了，因为必须有 262。每个字段的 5 行。然后垂直场扫描频率是为 0 上的微小差异。06 Hz 低于 60hz 已几乎没有影响垂直扫描和同步在接收机中，因为可以由 60 1 周期脉冲触发振荡器也可以由 59 同步。94-赫兹脉冲。应该指出的是，当扫描频率为彩色电视机些微地改变，传输的同步也是更改为新的频率为 # 和 $颜色频率。现在用的水平扫描线频率选择，可以确定彩色副载波。此值是要 $/ 2 的第 455 谐波:若要获取此确切的频率，颜色振荡器是晶体受控。一个典型的石英晶体单元如图 5-20 所示。455 的多重选择作为使 C 接近 358 MHz 的奇数

結果 (中文) 3:

垂直频率。垂直扫描频率也略有变化，因为必须有262。5行每字段。然后垂直场扫描频率为0。06赫兹，60赫兹以下的对垂直扫描和同步在接收机中几乎没有影响，因为振荡器可以由60-1周期脉冲触发也可以同步到59。94赫兹脉冲。应该指出的是，当扫描频率移略为彩色电视传输的同步，也
改为#美元和
颜色频率新频率。用水平线扫描频率选择了彩色副载波，该值为第四百五十五次谐波的元/ 2次，即获得该频率的精确值晶体控制。一个典型的石英晶体单元如图所示20。455的倍数被选为一个奇数，使得接近358兆赫