LIU He-ping1, WANG Hong-yuan2

(1. Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China;

2. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China)

Abstract: The main function and principle of a BPM short-wave time-service signal simulator is introduced. The components, input/output interfaces and software flow chart for this simulator are expounded. The clock of time-keeping of the simulator, whose time source is traced to GPS, is driven by a 10 MHz OCXO, a cryetal oscillator with high stability and constant temperature. The simulator produces the carrier frequency and modulating signal under the program control, and provides 6 channels of amplified BPM signals. Some tests indicate that the technical indexes of this BPM signal simulator meet the demand of BPM short-wave time-service signal.

Key words: BPM time-service system; short-wave time-service; time-signal simulator