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Rubidium oscillator delivers low phase noise

The latest rubidium oscillator from IQD, the IQRB-2, delivers low phase noise of -112dBc/Hz at 1Hz and -158dBc/Hz at 10kHz. It is housed in a 95.5 x 62.5 x 44.3mm module and therefore can be used in a 1U rack.

The electrical connections include an SMA connector for RF output, RS232 connectors RX & TX, a voltage control input and a frequency locked monitor.

According to the company, the device offers short term stability 100 times better than a typical Oven Controlled Crystal Oscillator (OCXO) at 0.002ppb/s at 100s. This makes the model suitable for frequency calibration, long term evolution base stations, high speed wireless communications and surveillance applications.

Based around an atomic clock, the IQRB-2 delivers an accuracy of ±0.3ppb in temperatures ranging from -20 to 65°C and operates at a standard frequency of 10MHz with a Sinewave 50Ω 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 5 minutes. Mean time between failure is 100,000 hours.

Peggy Lee

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