Products with large consumption of crystal oscillator

There are many kinds of crystal oscillators, which are generally divided into XO, TCXO, VCXO and OCXO. It will be used in electronic products, such as mobile phones and computers. But these products all use a few hairs of ordinary XO; In communication equipment, medical equipment and test instruments, there will be relatively high-end crystal oscillators with high stability, such as TC/VC/OC. For example, the 3G base station now uses TC/VC/OC. At present, OCXO is mainly used in some high-frequency base stations, but it tends to be replaced by high-end TC or VC.