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PGA460-Q1: 我用460EVM的GUI控制5529LP板,5529LP板通过串口连接用户板,设置如下面详情。为什么换能器两端波形无变化?

Part Number: PGA460-Q1
Other Parts Discussed in Thread: BOOSTXL-PGA460, PGA460

用460EVM的GUI控制5529LP板,5529LP板通过串口连接用户板,设置如下图:

data monitor窗口中回波波形有些变化。示波器检测换能器两端波形如下:

 该波形无论物体多远,都没变化。一筹莫展!请指教!