as prearranged是形容词词组?

问题描述:

as prearranged是形容词词组?
摄像机的干扰设置的最小区间决定识别干扰事件时间以及反应时间
Minimum duration in the camera tampering settings determines the timing of identifying
tampering events and reacting as prearranged

不是.
应该是一个独立结构做定语.as prearranged是修饰谁的?