虽然ISPCOLK产品具有优异的抖动规格，但是它们的PLL的动态特性与数据传输应用中的动态特性有很大的不同（例如基于ITU-T G.8262的那些）。关键差异在于PLL环路带宽。PLL用于基于从接收数据恢复的潜在边际时钟合成稳定时钟。这需要低环路带宽，所以PLL不应对短期波动。相比之下，ISPCOLD设备族具有高PLL环路带宽（＞1 MHz），这使得它们能够非常快地锁定到时钟源上，并且还最小化抖动。高带宽还允许ISPCLID设备快速跟踪参考时钟中的变化，从而允许诸如扩频时钟之类的技术。
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