对于特定的信号类型，例如低电平或高频率，则不宜使用模拟背板，以避免造成信号劣化。
For certain signal types, such as low level or high frequency, the analog backplane should not be used to avoid possible signal degradation.
通过比较输入与输出信号脉冲波形和眼图发现，随着传输速率和传输距离的增加输出信号劣化。
It shows that the signal will become bad with the increase of transmission velocity and distance by comparing the wave figure and eye diagram of input and output pulse.
通过优化泵浦相位调制的配置，平衡受激布里渊散射抑制和泵浦相位调制造成的转换闲频光信号劣化，可以使转换闲频光信号的劣化得到有效的抑制。
By optimizing the pump phase modulation configuration, the converted DPSK idler's degradation can be dramatically decreased through balancing SBS suppression and pump phase modulation degradation.
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