Using noise-optimized SC-cut crystals and noise-minimized electronic circuits, KVG’s engineers have succeeded in designing new OCXOs that provide high frequency stability, exceptional Ultra Low Phase Noise (ULPN) and Low G Sensitivity (LGS).

  • Nominal Frequency 100.00MHz
  • Ultra-low Phase Noise:
  • -135 dBc / Hz @ 100 Hz
  • -185 dBc / Hz Noise Floor
  • Low G Sensitivity <1ppb/g
  • Tight frequency stability +50ppb
  • Electrical frequency tuning input 0V to +10V
  • Small hermetically sealed package 25 x 25 x 12.7 mm
For high frequency crystal oscillators locked to a lower frequency reference such as 10 MHz OCXO, a GPS-disciplined oscillator or a Rubidium standard, the phase noise (PN) in the offset frequency range higher than the PLL bandwidth is particularly important, because that far out phase noise is determined not by the reference signal but by the locked RF oscillator, i.e. the 100 MHz OCXO.
The new 100 MHz OCXOs - O-40-ULPN-100M – provide a ‘Noise Floor’ of better than ‑185 dBc/Hz at 100 kHz offset. At 10 kHz offset the phase-noise is already better than ‑180 dBc/Hz and close to the carrier O-40-ULPN-100M gives a very good performance with‑135 dBc/Hz at 100 Hz offset.


  • Instrument Reference
  • Test & Measurement Systems (Network Analyzers, Signal Analyzers, etc.)
  • Medical Industry - e.g. Magnetic Resonance Tomography or Computed Tomography
  • Reference Clock for Microwave Signal Sources 
  • Radar Systems

In general, all applications in the GHz-range where the phase noise of the reference source is the determining factor for the performance of the complete system.
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