Using 99.99% pure quartz crystal oscillator, ultra-low noise. High stability, long-term stability can reach 0.0001 ppm/year. Low temperature drift, between 25C and 85C, temperature drift can reach 0.0001 ppm/℃. Low frequency offset, in the frequency range of 100Hz to 200kHz, the frequency offset can reach 0.000001Hz. Low phase noise, in the frequency range of 100Hz to 200kHz, the phase noise can reach -160 dBc/Hz.