temperature compensated oven controlled crystal oscillator (TC-OCXO)
A TC- OCXO is a temperature compensated and only limited temperature stabilized crystal oscillator( XO).
The concept of a TC-OCXO is a combination of an Oven Controlled Crystal Oscillator (OCXO) and a Temperature Compensated Crystal Oscillator( TCXO). The TC-OCXO is characterized by its high stability, which is about 0.5 ppm to 100 ppm (`10^-6`), about one power of ten higher than that of the unstabilized crystal oscillator. In addition, the TC-OCXO has a relatively low power consumption.