The frequency source is an important part of TT&C system

and its short-term frequency stability target becomes one of the important factors which affect the accuracy of TT&C system.The stability of the frequency source applied in the previous system does not meet the requirement of modern TT&C system.Super-high stability frequency source is designed and a particular simulation analysis of stability is done.It is realized by using a precise phase-locked loop consisting of the high speed phase detector and the super-high stability VCOCXO

and it is characterized by low phase noise

high stability

high reliability

etc.The test shows that the short-term stability of the super-high stability frequency source is less than 1×10-11/20ms and it can meet the requirement of system application.