Results show that the PWM controller of S-Function has higher accuracy while its modeling is simple.

通过比较说明，用S函数实现的PWM控制器有着准确性高、建模简单等优点。

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It's also unclear if the blue light seen atop the controller serves a function -- a stand-in for Move support, perhaps?

ENGADGET: Take a look at the next PlayStation's prototype controller (update: second photo)

Atop the controller sits an infrared sensor which activates a game's zoom in or scope function when it detects a user's looking down the barrel.

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