为什么需要测试光纤网络？

PCB proofing is a complex process. Different engineers use the same boards and components to produce different effects. So, what should be paid attention to in PCB proofing?  行业性能标准、服务水平协议和保修要求使得测试光纤网络不可避免，但还有许多其他原因需要测试和监控光纤网络性能。最终，测试的目标是最大限度地提高光纤网络资产在带宽、可靠性和投资回报方面的性能。
  市场对带宽的需求导致光纤网络的规模和复杂性增加。无源光网络(PON)架构、DWDM（密集波分复用）以及相干光学等其他创新技术引入了更多的电缆段和额外的专用组件，即使性能要求提高、损耗预算降低，这些也会增加额外插入损耗的风险。在所有网络级别和生命周期阶段进行全面准确的光纤测试，可以确保客户满意度和竞争优势。
  尽管训练有素的技术人员竭尽所能，但由于污染、宏弯和连接器损坏等因素，光纤的相对易损性仍然可能造成无法接受的损失。连接脏仍然是光纤网络故障的头号原因。在开通前对网络进行全面测试，可以主动检测和修复任何缺陷或损坏。虽然光纤在安装后非常耐用，但由于它是玻璃：在每个接合点，良好的处理和清洁是最重要的。一旦因破裂或灰尘压碎或划伤玻璃而损坏，就很难将光纤恢复到可接受的状态。
The locking effect refers to the existence of parasitic PNP transistors and NPN transistors in the internal structure of CMOS circuits, which only form a parasitic PNPN thyristor structure. This interlocked positive feedback structure may be triggered by external factors (such as electrostatic discharge), and the current will flow in the PNP tube (or NPN tube) and then be amplified by another parasitic NPN tube (or PNP tube), due to With positive feedback, the current will increase and eventually burn out. It can be seen that limiting the current so that it cannot reach the level of maintaining the locked state is one of the issues that needs to be considered when PCB proofing CMOS devices.