One-Port Scattering Parameter, i.e., S11 or echo response: This method is similar to FDR, but instead of looking for individual frequencies, a complete echo response measurement is utilized.

• 单端散射参数：例如，S11或者回波响应：这种方法类似于FDR，但不是查找每个单独的频段，而是使用一个全回波响应测试器。