Jitter is the generic term given to the difference between the “correct” timing of a received bit and the timing as detected by the phase locked loop (PLL). This means that due to operational limits, the detected timing will vary more or less randomly by a small amount either side of correct timing. It should be distinguished that jitter is not delay, vice versa. Jitter has many sources such as the transmission distortion or just the unstable operation of a digital PLL. In optical communications, the major cause of jitter is fiber dispersion. In addition, nonlinear effects also contributed to the jitter at a high transmission speed.
Added: 02nd January 2007 06:47:32 AM Modified: 02nd January 2007 06:47:42 AM
