Testing the PGA450 UART Connection With the TI GER Board，but it doesn't work

when i Use the steps that follow to test the UART connection with the TI GER board.fallow as the pdf of User's Guide SLDU019B–December 2015–Revised March 2016 ,but it doesn't work as the describe of the PDF .it work as follows 

Can you help me about it？

Seven Han：

PGA450属于超声波传感器，请到以下论坛进行咨询。

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