Furuno Electric Co., Ltd. (Headquarters: Nishinomiya, Hyogo Prefecture; President and CEO: Yukio Furuno; hereinafter "the Company") plans to begin sales of its new dual-band GNSS frequency standard generator (GNSSDO※1) "GF-100 Series (models: GF-102 / GF-103 / GF-105S / GF-105G)" in November 2026. Product Lineup Model Form Factor Holdover (24h) Output Features GF-102 Short ±20μs 10MHz, 1PPS Combines fundamental performance with cost-effectiveness GF-103 Short ±5μs 10MHz, 1PPS Popular model chosen for a wide range of applications GF-105S Short ±1.5μs 10MHz, 1PPS Delivers top-tier performance in a compact enclosure GF-105G Grande ±1.5μs 10MHz, 1PPS Ideal replacement for GF-8805 Release Date November 2026 (planned) Background GNSS-based time synchronization is a foundational technology for critical infrastructure supporting society, including telecommunications, power, finance, and broadcasting. While these infrastructures rely on precise timing, recent years have seen growing real-world threats to GNSS signals from interference (jamming※2) and spoofed signals (spoofing※3). In such environments, robustness—ensuring service continuity even during disruptions—is essential. Traditional holdover functionality was primarily designed for GNSS signal loss due to events like lightning-induced antenna failure. However, in cases of jamming or spoofing, receivers may continue to lock onto abnormal signals, rendering conventional systems insufficient. The GF-100 Series actively detects such GNSS signal anomalies and autonomously switches to self-sustained operation (holdover) using its internal oscillator, thereby avoiding adverse effects from abnormal signals while maintaining stable time synchronization. The GF-100 Series adopts a multi-layered defense design (Defense in Depth) to protect against various threats, ranging from routine signal degradation to intentional interference. Furthermore, numerous devices require precise time synchronization, including commercial radio base