This document includes all current VESA Monitor Timing Standards & Guidelines. 'Guidelines' are subjected to the same VESA review and approval process as 'Standards', but are designated as 'Guidelines' to ease concerns on the part of some VESA members that VESA is 'endorsing' these timing standards. 'Guidelines' designations are typically used for lower resolutions or lower refresh rates that are in common industry use in lower-performance systems. For reference, this document also includes a nu

视频电子标准协会（Video Electronics Standards Association, VESA）

使用直接测频法设计了一种简易的数显频率计，用于测量常见的正弦波、方波、三角波信号。该数显频率计主要包括时间信号电路、计数显示电路和时序控制电路，并进行了层次化的设计优化。时间信号电路完成输入信号与时钟信号的与运算，并把与运算后的脉冲传递给计数显示电路。计数显示电路完成频率计的频率计数以及显示功能。时序控制电路实现当上升沿或下降沿来临时触发脉冲的功能。在Multisim 11.0软件环境下进行总体电路的设计及调试，仿真结果表明数显频率计实现了正常的测量功能，满足设计要求。

详细定义了各种视频格式的时序要求，包括时钟、行同步、场同步信号