Abstract: The calibration error of equipment delay time is an important factor for events recording and intersection positioning in range measurement and control system. The accurate calibration is an important technology to achieve equipment time synchronization. Research on the equipment delay time problem, a clear physical definition of equipment delay time is put forward, which is easy to be measured. The calibration of the equipment time delay in discrete site is realized. Based on the improved B code, the effectiveness of monitoring the calibration of equipment time delay is verified. The test results show that the delay time calibration precision and accuracy reached ten microseconds.

Key words: Timing system, Calibration of equipment delay time, Improved B code, Time monitoring