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本文通过对塞入抖动波形作傅立叶变换,求到候时抖动完整的频谱表达式;同时又结合平滑锁相环的截止频率f_c,推出一组求剩余候时抖动频谱的公式。鉴于码速调整率ρ是在容差范围内的随机值,剩余候时抖动频谱也以各种不同分布形式存在。本文推出了一组求各种候时抖动频谱分布下的抖动峰-峰值新计算公式。以上两组公式的引入,较为合理、准确地描述了复接设备在无输入抖动情况下,码速调整引起的输出残余相位抖动。
In this paper, we get the complete spectrum expression when the jitter waveform is stuffed into the jitter waveform. At the same time, combining with the cutoff frequency f_c of the smoothing PLL, we propose a set of formulas to find the remaining jitter spectrum. Since the code rate adjustment rate ρ is a random value within the tolerance range, the remaining candidate jitter spectrum also exists in various different distributions. In this paper, we propose a new set of formulas for calculating jitter peaks and peaks under various jitter spectral distributions. The introduction of the above two sets of formulas is more reasonable and accurately describes the output residual phase jitter caused by the code speed adjustment in the case of no input jitter in a multiplexing device.