The CRT or oscillograph to display the waveform of mark signals is not needed because the software adopted fuzziness addressing and auto track algorithm, so the cost of equipment improvement is reduced.

• 软件算法上，采用模糊寻址、自动跟踪方式，避免了利用波门精确寻址需要的显示设备，降低了对设备改造的成本。