一旦信号是可用的，外设就会关闭信号可用线并将数据选通至接口。
When the data is available, the peripheral negates the data-available line, and data is then strobed into the interface.
相位编码雷达可以采用一种检测方法实现对该宽带多普勒信号的检测，其结果不但可以指示速度，而且还可以作为速度选通的抗干扰措施。
A detection method will let phased coded radar to detect such wideband doppler signal, whose result not only gives speed information, but also filters ground echo by speed as a anti-jamming measure.
当被测信号频率较低时，需要很宽的选通门才能得到较高的测量精度。
If the signal frequency to be measured is low, wide strobe gate is required for high measurement precision.
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