Libera Reference Master Oscillator

Libera Reference Master Oscillator (RMO) is used as a low-noise and stable source of an RF signal which can serve for synchronization of different devices (e.g. LLRF stations in an accelerator).

Libera RMO from Perspective
Product Description
References

Libera Reference Master Oscillator (RMO) general description:

Libera RMO is used as a low-noise and stable source of an RF signal which can serve for synchronization of different devices (e.g. LLRF stations in an accelerator). The core of the device is a low-noise oven controlled crystal oscillator (OCXO) which guarantees long-term stability. Direct Digital Synthesis (DDS) technology is used to generate output RF signals at different frequencies. The DDS is utilized to provide frequency sweep functionality.

Optionally the Libera RMO can be locked to an external reference RF signal (e.g. a rubidium oscillator or GPS signal) by means of phase locked loop (PLL). In this way even better long-term stability can be achieved.

Libera RMO front and back panel:

Benefits:

  • Down to <60 fs RMS jitter integrated from 10 Hz to 10 MHz
  • Frequency stability in the free-running mode 5*10^-11 (Allan Deviation)
  • Customized to the user frequency
  • Ethernet attached device, EPICS IOC

Compatible with other Libera products:

Libera Reference Master Oscillator Capabilities
General product codeLRMO
Supported frequency ranges50 Hz - 3120 MHz
RF output1, SMA connector, 50 Ω
Nominal RF output power+15 dBm at least
RF output power stability0,05 dB/K
Phase noise (integrated from 10 Hz to 10 MHz)Max: < 90 fs RMS Typically: 40 - 60 fs RMS
Harmonic suppression< 50 dBc up to 5th harmonic
Frequency stability in free running mode (Allan Deviation)5*10^-11 (Allan deviation)
RF output return loss-15 dB
RF reference input1, SMA connector, 50 Ω
RF reference input frequency 10 MHz ± 20 Hz
RF reference input power-20 dBm - +10 dBm
PPL lock time< 30 s
Stability operation temperature range20 - 25 °C
Operating relative humidity range0 - 80 %
DimensionsH: 1 U, W: 19" (rack mountable), D: 358 mm
Libera Reference Master Oscillator Functionalities
Locking to an external 10 MHz reference signal by means of a PLL
Frequency sweep
Frequency setting on trigger
Remote control via Ethernet
EPICS IOC

*Customizations are possible.

Libera Reference Master Oscillator is used at the following labs:

  • Shanghai Jiao Tong University, China
  • Sabina – Laboratori Nazionali di Frascati dell’INFN, Italy

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