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AWR2243: 使用API读取的20G本振功率和仪器测量结果误差较大

Part Number: AWR2243

您好,我们使用芯片级联方案,调用2243的API读取20G本振功率,同时使用仪器进行测量,发现使用API读取出的20G本振功率和使用仪器测量出的相差4到9dB。请问这可能是啥原因,是我们设计的板子有问题吗?