Choosing a crystal with the correct characteristics is one of the most critical steps in using a Voltage Controlled Crystal Oscillator (VCXO). The crystal parameters affect the tuning range and accuracy of a VCXO. Below are the key variables and an example of the crystal parameters used to select a VCXO. Refer to application note AN-848 for more details. For other questions not addressed by the Knowledge Base, please submit a technical support request.