If all else fails to prevent rf interference from being introduced into the input, external filtering of the device input paths may be required, as shown in Figure 3-7.

如果所有的措施都不能避免RF干扰进入测试输入端，那么就可能需要在设备的输入通路上进行外部滤波，如图3 - 7所示。

youdao

Connect any and all of it with an alligator clip and you have an input device.

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But for the researchers, the board is simply another interesting low-cost input device for enabling new user interactions, says Matthieu Deru.

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Formed seemingly from a single block of Lucite, the new mouse looks more like a drop of mercury than an input device.

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