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TDC1000-C2000EVM: 测量距离没有明显变化

Part Number: TDC1000-C2000EVM
Other Parts Discussed in Thread: TDC1000

你好,我使用TDC-1000-C2000-EVM,换能器为76KHZ的气体流量换能器,测试水平到墙壁的距离,使用外部clkin,分频得到76KHZ的TX_FREQ,从GUI上面能够看的时间,但是改变距离后没有明显变化,请问,EVM上的1M带通滤波器是否需要更改,是否有具体的测量范围,是否是我的换能器不适用测距,换能器文件在附件中78K超声波气体流量换能器规格书 - 钛合金.pdf