根据经验法则，实际滤波器的可实现过渡区域约为其截止频率的1%。基于此，截止频率约为60 kHz。换句话说，如果滤波器的可用过渡带为600 Hz，边带滤波器的考虑将最大载波频率限制在约60 kHz。

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