Understanding VCXO Specifications: APR

Like most oscillators, VCXOs have many specifications. APR – Absolute Pull Range – is a single specification that combines many of them to make selection easy. The term “Pull” is unique to the oscillator industry and refers to the small frequency tuning available via the voltage control pin. Pull is measured as df/fnom in ppm.

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How do you specify temperature stability on your TCXO datasheets?

TCXO: Stability vs Accuracy

Temperature compensated crystal oscillators (TCXOs) are used for frequency reference in systems that require a frequency stability of 10 ppm or better, which typically cannot be achieved by a standard XO (crystal oscillator) or VCXO (voltage controlled crystal oscillator).

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