  The timing system of SPring-8 booster synchrotron generates various timing
signals concerning beam injection, acceleration from 1 GeV to 8 GeV and
ejection. We have improved the timing system of the synchrotron giving it
better stability and flexibility. This improvement results the other merits of
advanced operations, for example, storing electron beam in the synchrotron,
changing the injection cycle from 1 Hz to the slower frequency to increase the
RF knock-out (RF-KO) operation period and ejecting the low energy beam during
ramping up.
