• Product Model:
    HF Citrine PLO



    The HF Citrine PLO is a 10 MHz to 25 MHz fixed frequency rugged OCXO integrated with a low noise phase lock loop circuit. The PLO offers excellent aging and temperature stability (when free-running), Standard or Premium phase noise options and low g-sensitivity (to 1E-10/g per axis). Frequency dividers are used to prescale the internal HF oscillator and the external reference frequencies to phase lock at a common lower frequency. The PLL loop bandwidth is typically ≤ 1 Hz, but can be configured for optimal performance considering the reference signal provided. Designed for demanding applications, the HF Citrine PLO provides excellent phase noise performance under vibration with both hard mount and a vibration isolated version available. The hard mount nickel-plated machined aluminum package is 2.25” x 2.25” x 1.3”. An internal voltage regulator is provided for excellent power supply line rejection. Please consult the factory if you need any specifications to be modified to better suit your application.



    • Frequencies from 10 MHz to 25 MHz, fixed
    • Standard or Premium Phase Noise
    • Ruggedized for Dynamic Environments
    • PLL Loop Bandwidth as low as 1 Hz
    • Low G-Sensitivity to 1E-10/g per axis
    • Excellent Temperature Stability
    • Low Aging Rate
    • Vibration Isolated Version Available



    • Military Applications
    • Airborne, Ground, Shipboard
    • Radar Systems
    • Tactical Radio
    • Vehicular Communication
    • Reference Source


    Frequencies 5 MHz to 25 MHz, fixed
    Standard and Premium Phase Noise
    Ruggedized for Dynamic Environments
    Nickel-Plated Machined Aluminum Case
    SMA(f) and Solder Pins on Side
    Optional Voltage Reference and Oven Monitor Pins
    Output: Sine, +13 dBm, Standard
    Automatic Input Detection
    Low Loop Bandwidth: ≤ 1 Hz,typical
    Low G-Sensitivity to 1E-10/g per axis
    Excellent Temperature Stability, Free-Running
    Low Aging rate
    Vibration Isolated Version Available


    Radar Systems
    Tacticle Radio
    Vehicular Communication
    System Synchronization

    Typical Specifications

    HF Citrine PLO Typical Specs

    Mechanical Drawing

    HF Citrine PLO mechanical