MOC700 is a VPX standard bus timing modulethat meets customized requirements. It integrates external frequency standardphase-locked loop, high stability low phase noise constant temperature crystaloscillator OCXO, high precision timing receiver. It uses phase detectiontechnology and adaptive tracking and holding. Algorithm to generate and sendprecise and stable time and frequency signals. The system receives the time,location and short message information of the Beidou satellite system,completes the functions of timing, hold-over, positioning and short messageforwarding, and also supports GPS satellite signal input.