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The miniRAFS from Safran is a Rubidium Atomic Frequency Source with an operating frequency of 60 MHz (Main) and 10 MHz (Auxiliary). It provides an output signal level of 7 dBm and has a frequency accuracy of better than 2 x 10-10. The frequency source has a phase noise of -135 dBc/Hz (@100 kHz offset), spurious levels of better than -60 dB and harmonics of -30 dBc. It is a complete atomic clock within a very small volume. This space-qualified source can be complemented on request with an Electronic Power Conditioning “EPC” unit that includes a DC/DC converter and an electrical interface to the satellite. The EPC design could be adapted for specific satellite requirements.

The miniRAFS is a complete Rubidium clock module which consists of a voltage-controlled crystal oscillator (VCXO) and is locked to a highly stable atomic transition in the ground state of the Rb87 isotope. It operates over a digital supply voltage from 3.5 to 5 V or over an analog supply voltage from 15.5 to 16.6 V and consumes less than 10 W of power during nominal operation. The frequency source is available in a compact enclosure with SMA connectors and is suitable for use in deep space missions, secure satellite communications, tracking and guidance control, earth observation satellites, science missions and advanced low satellite orbit digital communication.

Product Specifications

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Product Details

  • Part Number
  • Manufacturer
    Safran Electronics & Defense
  • Description
    10/60 MHz Space-Qualified Rubidium Atomic Frequency Source

General Parameters

  • Frequency
    10 MHz (Auxiliary) / 60 MHz (Main)
  • Output Waveform
  • Output Power
    7 dBm
  • Grade
    Space Qualified
  • Supply Voltage
    3.5 to 16.5 V
  • Current
    0.2 to 0.6 A
  • Harmonics
    -30 dBc
  • Spurious
    -80 to -60 dB
  • Phase Noise
    -135 to -64 dBc/Hz
  • Phase Noise 1 kHz
  • Phase Noise 10 kHz
  • Phase Noise 100 Hz
  • Short Term Stability
    0.0003 to 0.01 ppb
  • Short Term Stability 100s
    0.001 ppb
  • Short Term Stability 10s
    0.003 ppb
  • Short Term Stability 1s
    0.01 ppb
  • Return Loss
    20 dB
  • Interface
    SUB-D 25
  • Application
    GNSS/GPS Navigational Systems, SAR Systems, FGU Systems, MRO Systems, Space Scientific Missions, Secure Satellite Communications, Tracking and Guidance Control, Advanced Low Satellite Orbit Digital Communications
  • Package Type
    Module with Connector
  • Connector
  • Dimension
    107.5 x 67.5 x 53.5 mm
  • Weight
    0.45 Kg
  • Operating Temperature
    -15 to 55 Degree C
  • Storage Temperature
    -55 to 85 Degree C
  • Note
    Cold Start : -25 Degree C, Power Dissipation : 10 to 15 W

Technical Documents