VHF Citrine PLO


The VHF Citrine PLO is a 25 MHz to 160 MHz fixed frequency rugged OCXO integrated with a low noise phase lock loop circuit. 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. Designed for demanding applications, the VHF 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” x 2” 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 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
  • Vibration Isolated Version Available


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

Typical Specifications

VHF Citrine PLO VHF Citrine PLO Plot VHF Citrine PLO Typical Specs

Mechanical Drawing

VHF Citrine PLO mechanical

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