光网络设备调测时,一旦发生光功率过高就容易导致烧毁光模块事故,符合规范要求的是( )。
①调测时要严格按照调测指导书说明的受光功率要求进行调测
②进行过载点测试时,达到国标即可,禁止超过国标2个dB以上,否则可能烧毁光模块
③使用OTDR等能输出大功率光信号的仪器对光路进行测量时,要将通信设备与光路断开
④不能采用将光纤连接器插松的方法来代替光衰减器
- A.①②③④
- B.②③④
- C.①②
- D.①②③
正确答案及解析
正确答案
解析
调测前,必须先掌握单板要求的接收光功率参数,严格按照调测指导书说明的受光功率要求进行调测。
输入光信号在接入单板接收光口前,必须先测试光功率是否满足调测要求,禁止光功率超过接收过载点时进行不加光衰自环的操作,保证输入光功率不超过器件允许的最大值。
进行过载点测试时,达到国标即可,禁止超过国标2个dB以上,否则可能烧毁光模块。
使用OTDR等能输出大功率光信号的仪器对光路进行测量时,要将通信设备与光路断开。
不能采用将光纤连接器插松的方法来代替光衰减器。
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