Signal modulation is the last physical part of DTV Front-End, which directly determines the quality of network transmission.

信号调制是数字电视前端最后的一个物理环节，直接决定信号在网络中传输的质量。

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At last, has measured the quality and efficiency of exporting light beam in the signal horizontal model laser device, and analyze the measuring result.

最后测量了单横模激光器在非稳腔下的输出光束质量，以及系统的效率，并对测量结果进行了分析。

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