HF Bootstrap II


At HF frequencies, the Bootstrap oscillator provides unprecedented low-g sensitivity to 2e-11/g. The standard Bootstrap oscillator consists of two rugged OCXOs of the same frequency, which can be any fixed frequency between 10 MHz and 25 MHz, and all necessary components to phase lock the two oscillators together. Special compensation techniques are used to minimize vibration induced phase noise including positioning the two oscillators mechanically in two axes to offset vibration sensitivity as well as adjusting the electrical tuning of both oscillators with a properly scaled compensation voltage. The Bootstrap oscillator assembly is an ideal solution for the most demanding airborne, mobile and shipboard applications requiring greatly improved dynamic phase noise performance with effective acceleration sensitivity performance approaching 2E-11/g per axis. Effective acceleration sensitivity to 2E-12/g can be realized with the addition of an external vibration isolation system, assuming a typical natural mount resonant frequency around ~30 Hz. The assembly is housed in a 4.5” x 4.0” x 0.9” machined aluminum case. 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
  • Ruggedized for Dynamic Environments
  • Standard or Premium Phase Noise Options
  • Effective G-Sensitivity to ≤ 2E-11/g per axis
  • Externally Vibration Isolated Version Available with Effective G-Sensitivity to 2E-12/g (2 kHz)


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


Typical Specifications

HF Bootstrap II Typical Specs 170522

Mechanical Drawing

HF Bootstrap II_Not Isolated

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