The HSO14 from Rakon Limited is a Ground Ultra Stable Oscillator that is available in either 5 MHz or 10 MHz standard frequency. It has short-term stability of 8 x 10-14 (ADEV) and frequency stability of ±5 x 10-11 (over 0 to +50°C). The oscillator requires a supply voltage of 24 V and has an aging of ±5 x 10-11 (±50 ppt) per day. The oscillator produces maximum harmonics of up to -40 dBc and spurious of -80 dBc. It has a mass of 1100 grams and measures 73 x 135 x 84 mm. The oscillator is suited for high and precise frequency stability applications such as calibration and metrology laboratories.