SparkFun unveils GNSS Disciplined Oscillator

SparkFun Electronics has introduced its first ultra-high-precision GNSS timing product, the SparkPNT GNSS Disciplined Oscillator (GNSSDO). Designed for applications requiring sub-nanosecond timing and frequency precision, the GNSSDO is built around Septentrio’s multi-constellation, multi-frequency, L1/L2/L5-ready mosaic-T module.

The device integrates Septentrio’s mosaic-T GNSS timing receiver, Espressif’s ESP32-WROVER processor and the SiTime SiT5358 disciplined 10 MHz oscillator on a single circuit board. It is housed in a custom extruded aluminum case with machined end panels and slotted flanges, making it suitable for installation in weatherproof enclosures or server racks.

The GNSSDO offers impressive timing precision. Its time pulse accuracy is 5 ns, which improves to under 1 ns with an optional subscription to Fugro AtomiChron via L-Band. Event accuracy is less than 20 nanoseconds.

To ensure reliability and security, the Septentrio mosaic-T module provides robust performance even under challenging conditions such as GNSS jamming or spoofing. The system’s multi-constellation and multi-frequency capabilities, combined with AIM+ technology, are designed to enhance resilience. Additionally, the integration of SiTime’s Super-TCXO ensures superior clock frequency stability and accuracy during GNSS outages.