• Product Model:
    Vibration Isolated VHF Citrine PLO



    The Vibration Isolated VHF Citrine PLO is a 25 MHz to 160 MHz fixed frequency rugged OCXO integrated with a low noise phase lock loop circuit and mounted within an outer enclosure using shock mounts. The PLO offers good temperature stability (when free-running), Standard, Premium or Golden phase noise options (to -190 dBc/Hz) and low g-sensitivity (to 2E-10/g per axis). Frequency dividers are used to prescale the internal VHF oscillator and the external reference frequencies to phase lock at a common lower frequency. The PLL loop bandwidth options are typically ≤5 Hz or ≤60 Hz, but can be configured for optimal performance considering the reference signal provided. Although vibration isolation may not be a viable solution for some applications, it works well for dampening vibration beyond the natural resonant frequency of the isolated unit, typically 30 Hz to 50 Hz, and varies depending on the weight of the isolated unit and vibration profile. The Vibration Isolated VHF Citrine PLO is an ideal solution for airborne and mobile applications with random vibration requiring improved dynamic phase noise performance at offsets at and beyond 80 Hz. Effective g-sensitivity to 5E-12/g (2 kHz offset) can be realized. The nickel-plated machined aluminum outer enclosure is 3” x 2.8” x 1.75”. 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 25 MHz to 160 MHz, fixed
    • Standard, Premium or Golden Phase Noise
    • Ruggedized for Dynamic Environments
    • PLL Loop Bandwidth: 1 Hz to 100 Hz
    • Low G-Sensitivity to 2E-10/g per axis
    • Natural Mount Frequency: ~35 Hz, typical
    • Effective G-Sensitivity to 5E-12/g (2 kHz offset)



    • Military Applications
    • Airborne and Ground
    • Radar Systems
    • Tactical Radio
    • Vehicular Communication


    Frequencies from 25 MHz to 160 MHz, fixed
    Standard, Premium, or Golden Phase Noise Options
    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
    LBW: 1 Hz to 100 Hz (Optimized for Best Performance)
    Low G-Sensitivity to 2E-10/g per axis
    Natural Mount Resonant Frequency (~35 Hz, typical)


    Radar Systems
    Tacticle Radio
    Vehicular Communication
    System Synchronization
    Test Equipment

    Typical Specifications


    Mechanical Drawing