The HSO13 from Rakon Limited is an Ultra Stable Oscillator with a nominal frequency of 5 or 10 MHz. This oscillator has a relative pulling frequency range of ±20 to ±50 ppb and frequency stability of ±50 ppt (Vs temperature). It has a harmonic of -40 dBc and a spurious of -70 dBc. The oscillator requires a power supply of 11.4 to 25.2 V and has a load impedance of 47.5 to 52.5 Ohms. It has a mass of 350 g and measures 67 x 60 x 40 mm. This oscillator is ideal for applications such as ground stations, master clocks, and as a reference oscillator for laboratories.