帧对齐信号FAS ？
Emphasis is placed on the reliability of transmission of time clock and frame alignment signal, th...
其中详细介绍时钟和帧定位信号传递的可靠性，同步系统可靠性以及数字信号连接等问题。
Alignment signal of phase grating alignment mark and the factors of influece of alignment signal are analysed secondly;
其次分析影响相位光栅对准标记衍射效率的主要因素槽深、占空比和反射率；
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