Finishing one time of grain renewing in sampling channel needs about 28 seconds.

历时28秒左右取样通道完成一次谷物更新。

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CPLD controls the switching of sampling channel and the reading and writing of converted data.

用CPLD控制采样通道的转换，读写转换数据。

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For hardware design, RC filter, voltage sensitive resistor and photoelectric isolation method are used to eliminate interference signal in sampling channel and A/D channel.

在硬件方面，采用RC滤波器、压敏电阻、光电隔离等措施，消除了采样通道及A/D通道的干扰信号；

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These spikes in viewership allow a fledgling channel to showcase its other programs to a large sampling of the country, and make some significant advertising gains.

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