利用文中给出的通用干扰图，不仅可以清晰地了解干扰分布，准确地找出乘法器输出的组合干扰，而且可以选择无干扰中频。
Using this general interference chart, all of combined interference can be found quickly and exactly, and the IF without interference can be selected as well.
当选择信号为逻辑高电平（1）时，乘法器510传输反相器504的输出信号给发生器404的输出作为输出信号VOUT。
When the select signal is a logic high (1), multiplexer 510 transmits the output signal of inverter 504 to the output of generator 404 as output signal VOUT.
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