In this paper,the influence of vibrations on the crystal oscillator is analyzed.To restrain high-frequency vibration effectively,a two-stage passive vibration isolation system for crystal oscillator is presented.The simulating result showed that this kind of vibration isolation system had low displacement transmissibility.The experimental results showed that at the condition of the random vibration with the power spectral density of 0.05 g2/Hz and the frequency range of 20 Hz to 2 000 Hz,the dynamic SSB pha...