通过调整同步环路的环路增益，可以获得更好的频率跟踪性能。

Better carrier frequency tracking performance can be gotten by adjusting the loop gain.

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传统的反馈环路增益仿真方法基于有源双端口网络，分析复杂，不利于快速得到环路的定量分析。

Traditional loop gain simulation method is based on two-port network models, which is complex to analysis and it is not suitable to get quantitative analysis of the loop gain fast.

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在锁相频率合成器中，由于压控灵敏度的变化，环路增益也将产生同样大小的变化，这就妨碍了环路特性的最佳化。

In frequency synthesis by phase lock, the loop gain will vary by the same amount due to this effect, which generally im - pedes optimization of loop performance.

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