Home of RF and Wireless Vendors and Resources

One Stop For Your RF and Wireless Need

OCXO G-Sensitivity | What is OCXO G-sensitivity | Acceleration Sensitivity

This page describes OCXO G-sensitivity. It mentions both OCXO G-sensitivity definition and G-sensitivity formula/equation and unit of measurement used with OCXO.

OCXO G-sensitivity definition:
OCXO is the full form of Oven Controlled Crystal Oscillator. The change in frequency output due to applied acceleration force to an oscillator is known as G-sensitivity. It is also known by the name Acceleration Sensitivity. This is due to the fact that quartz used in the OCXO construction is electro-mechanical device. If a voltage is applied across the crystal, it will oscillate and if a vibration is applied, it will induce voltage.

OCXO working operation

There are different types of OCXO viz. AT cut, IT cut and SC cut. The SC-cut crystal type lower g-sensitivity due to stress compensation feature. The OCXO g-sensitivity is measured in units of ppb/g. The figure-1 depicts internals of OCXO.
Refer OCXO basics and types>> for more information.

The g-sensitivity for bulk mode quartz crystal range from less than 1x10-10 per g for carefully made SC cut crystal to greater than 1x10-7 per g for low cost AT cut crystal type.

OCXO G-sensitivity formula or equation

Following equations or formula used for OCXO G-sensitivity are as follows. The induced phase noise degradation of oscillator can be easily calculated from g-sensitivity of oscillator.

OCXO G-sensitivity formula

By knowing PSD of vibration input, it is possible to compute g-sensitivity of crystal from the resultant phase noise plot. The equations are obtained from Greenray Industries website. For more information visit https://www.greenrayindustries.com/accsens_tb3.html link.

Also refer RF Phase Noise and Jitter basics>>.

OCXO and other Crystal Oscillator types RELATED LINKS

TCXO basics and types
OCXO basics and types
Crystal Oscillator vs MEMS Oscillator
crystal oscillator manufacturers
crystal oscillator vs frequency synthesizer
Vectron OCXO
Rakon TCXO
GPS Guided TCXO Oscillator

More RF Links

RF converter design
C band RF Transceiver basics
RF filter design
RF vector Signal generation/analysis
Microstrip line basics
RF and SoC Testing
rf connector
Rectangular Waveguide
RF Terminologies
what is RF
RF circulator basics

What is Difference between

PDH vs SDH  SONET versus SDH   CAS vs CCS  Types of WDM   Single vs multimode fiber  

RF and Wireless Terminologies