Rubidium atomic oscillator module delivers low phase noise

IQD’s latest high performance rubidium oscillator, the IQRB-2, delivers low phase noise of -112dBc/Hz at 1Hz and -158dBc/Hz at 10kHz. It is housed in a 95.5mm x 62.5mm x 44.3mm module so can be used in a 1U rack. The electrical connections include an SMA connector for RF output, RS232 connectors RX and TX, a voltage control input and a frequency locked monitor. With a short term stability 100 times better than a typical CXO at 0.002ppb/s at 100s, this model is ideal for frequency calibration, LTE base stations, high speed wireless communications and surveillance applications. Based around an atomic clock, the IQRB-2 delivers an accuracy of ±0.3ppb irrespective of temperature fluctuations from -20C to 65C and operates at a standard frequency of 10MHz with a Sinewave 50ohm output. The ageing is ±0.05ppb per month and the IQRB-2 has a voltage control option to give a controllable frequency tuning of ±2ppb max. The module is specified with a supply voltage of 12V, although the product will operate over a voltage range of 12V to 18V, with a power consumption of 6W when stabilised and a warm up time of typically five minutes. The device can be operated over a temperature range of -20C to +65C and MTBF is approximately 100,000 hours.