Status of the RF System for the 6.5 GeV Synchrotron Light Source PF-AR

In this paper, we report the operations, troubles, and modifications of an rf system for the 6.5 GeV synchrotron light source PF-AR for the past two years. It includes a strange trouble in one of the cavities, our efforts to recover this cavity, and the work of transferring two cavities from the west to the east rf section.