A.G.651、G.656 B.G.652、G.655 C.G.657、G.658 D.G.655、G.659
A.G.652 B.G.654 C.G.659 D.G.655
A.大于接收靈敏度的功率范圍 B.在接收靈敏度和過載光功率之間的范圍 C.小于過載光功率的功率范圍 D.等于接收靈敏度的功率范圍