Time synchronization modules are core components in electronic devices for achieving time synchronization; they generate high-precision time references by receiving satellite signals or utilizing network protocols and are widely used in sectors such as telecommunications, finance, electric power, and transportation. Their primary function is to provide a unified time reference for systems, ensuring data consistency during the coordinated operation of multiple devices and preventing logic errors or malfunctions caused by timing discrepancies. With the advancement of IoT and 5G technologies, the precision, stability, and environmental adaptability of these modules have become critical technical metrics.
Time synchronization modules achieve synchronization through two primary methods: satellite-based timing (e.g., GPS, BeiDou) and network-based timing (e.g., the PTP protocol). Satellite-based timing relies on receivers to decode time codes from satellite signals and employs multi-satellite positioning algorithms to eliminate errors such as ionospheric delay, typically achieving precision of ≤50 ns. Network-based timing transmits timestamps via Ethernet and utilizes the PTP protocol's clock synchronization mechanism to achieve microsecond-level precision. The module features a built-in, high-stability oven-controlled crystal oscillator (OCXO) as a local clock source to maintain timing accuracy during satellite signal loss, achieving a 24-hour holdover error of ≤10 µs. Its PCIe bus interface supports direct power supply from the motherboard (+12V ±0.5V), minimizing external power interference, while an optional IRIG-B output meets industrial requirements for serial time codes.