The chromatic dispersion of fiber is a major factor causing distortion of the light signals, and if not being addressed using accurate compensators it will lead to a significant deterioration in the performance of optical system. The value of chromatic dispersion is not fixed along the fiber, and this necessitates the use of tunable dispersion compensators which need information about the value of dispersion which is done by dispersion monitoring. This research is Interested in analyzing chromatic dispersion technique based on the measuring of clock tone power of transmitted data and which is commensurate with the dispersion of the fiber. We found the relationship between signal frequency with range and accuracy of measurement. Also, the advantage of this technique to provide feedback signal to tunable dispersion compensator. The results show the extent of the improvement made in network performance. VPItransmissionmaker program was used to simulate the technique proposed.