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CHRISS TSU Solution Overview

This video presents the CHRISS Time Synchronisation Unit (TSU) — a next-generation, Galileo-based timing distribution and synchronisation solution designed for critical telecommunications infrastructure, including 5G networks.

The TSU integrates seven key capabilities into a single 1U rack-mount device: multi-frequency GNSS/INS reception across Galileo E1, E5, and E6 bands, robust interference detection and mitigation, spoofing detection, Galileo OSNMA signal authentication, blockchain-based cyber-attack protection, nanosecond-accuracy time distribution, and FPGA-based deterministic signal processing.

As one of the first GNSS Grandmasters on the market with integrated White Rabbit support, the CHRISS TSU delivers a cost-effective, modular, and resilient synchronisation solution — built to meet the demanding accuracy and security requirements of modern telecom networks

Blockchain Security Demo – CHRISS TSU

This video demonstrates the blockchain-based security mechanism integrated into the CHRISS Time Synchronisation Unit (TSU). Built on a permissioned Hyperledger Fabric network, the solution enables tamper-proof recording of TSU operational data — including clock accuracy, GNSS interference presence, authentication status, and device alerts — directly on a distributed ledger.

The demo showcases live smart contract interactions via a REST API gateway: storing TSU telemetry snapshots on-chain, retrieving full audit-trail histories, reporting anomaly alerts, and enforcing access control policies that reject unauthorized transactions. This blockchain layer provides an additional line of defence against cyber-attacks targeting time synchronisation messages transmitted over critical infrastructure networks.

CHRISS Satellite FIX TSU – Technical Demonstration

This video provides a live technical demonstration of the CHRISS Satellite FIX Time Synchronisation Unit (TSU), showcasing its resilience and precision in real-world challenging conditions.

The demonstration covers four key scenarios: GNSS fix acquisition in Grandmaster Mode with real-time CLI and GUI monitoring; active jamming mitigation using an FPGA-based system that suppresses narrowband interference by approximately 20 dB without prior knowledge of the jamming frequency; White Rabbit optical fiber synchronisation validated over both 5-metre and 5-kilometre cables, achieving sub-nanosecond precision; and automatic failover to an internal atomic clock upon GNSS signal loss, with seamless re-acquisition within 60 seconds and 6-nanosecond jitter once the signal is restored.

Throughout the demo, the CHRISS Satellite FIX GUI provides continuous monitoring of module statuses, internal temperature, PTP connections, and blockchain synchronisation state — confirming the TSU as a robust, high-precision timing solution for critical infrastructure.

CHRISS Satellite FIX TSU – System Resilience & Precision Demonstration

This video presents a live technical demonstration of the CHRISS Satellite FIX Time Synchronisation Unit (TSU), an advanced EGNSS-based solution operating in Grandmaster Mode as a primary time reference for critical infrastructure.

The demonstration walks through four core capabilities. First, GNSS fix acquisition is shown with real-time feedback across multiple interfaces — CLI, WebGUI, and front-panel LED indicators. Second, the system’s FPGA-based jamming mitigation is tested against strong narrowband interference in the GNSS L1 band, with real-time spectral graphs confirming active suppression of over 20 dB and automatic operator alerts via the GUI. Third, White Rabbit optical fiber synchronisation is validated across both 5-metre and 5-kilometre cables, achieving a stable 1 PPS delay of approximately 500 picoseconds — demonstrating sub-nanosecond precision over long distances. Fourth, automated failover is showcased: upon GNSS signal loss, the TSU seamlessly switches to an internal atomic clock backup, then re-acquires the satellite reference within 60 seconds with minimal jitter of around 6 nanoseconds once restored.