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如何降低TRF372017相位噪声和EVM?

Other Parts Discussed in Thread: TRF372017

TI 专家好:

现在有个问题想请教一下关于之前的一个芯片TRF372017的问题,

    现在问题是:

                   频率1.4G的时候,数字板的EVM为  3%左右

                   现在频率改成1.8G的以后,数字板的EVM  为4.5%左右,大了很多,这样的话,整机指标就过不了  小于5%的指标要求,

       请帮忙分析一下,改进哪里的配置,能把TRF372017芯片 的相位噪声降低,EVM变好!   谢谢!