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The chart shows the long term stability over time for each of the different frequency standards: Quartz, Rubidium, Cesium, and Hydrogen Maser.
Graph of Oscillator Accuracy, Graph of Oscillator Accuracy
XO - Clock Oscillator
CXO - Crystal Oscillator
DTCXO - Digitally Temperature Controlled Crystal Oscillator
EMXO - Evacuated Miniature Crystal Oscillator
FCXO - Frequency Controlled Crystal Oscillator
HPXO - High Precision Crystal Oscillator
MCXO - Microprocessor Compensated Crystal Oscillator
OCXO - Oven Controlled Oscillator
OCVCXO - Oven Controlled Voltage Controlled Oscillator
PXO - Precision Oscillator
PXO - Programmable Crystal Oscillator
SPXO - Simple Packaged Crystal Oscillators
TCXO - Temperature Compensated Oscillator
TCVCXO - Temperature Compensated Voltage Controlled Oscillator
VCXO - Voltage Controlled Oscillator
VCSO - Voltage Controlled Sinewave Oscillator
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