optisystem 7.0仿真的NRZ数据在SMF中传输的情况，可以改变SMF的长度和NRZ的符号速率来观察系统的色散对系统性能的影响。-Ooptisystem 7.0 simulation NRZ data transmission of in the SMF, can change the length of the SMF NRZ and the symbol rate to observation system of the dispersion effect the performa