Satellite Timing Security
Flagship YZ-9770 — in April 2022 it became the first device of its class in China to pass SGEPRI certification. Detects and isolates GNSS spoofing, jamming and suppression to deliver a "timing firewall" for grids and other critical infrastructure. Already deployed across SGCC Chongqing and other provincial grids.
Overview
YZ-9770 Satellite Timing Security Appliance (April 2022: first device of its class in China certified by SGCC's EPRI) detects and isolates GNSS spoofing, jamming, replay, and suppression attacks, hardening critical infrastructure against satellite-timing risk.
Why It Matters
The attack surface against GNSS timing has expanded rapidly:
- Spoofing — counterfeit signals lock receivers to a false time
- Jamming — broadband noise causes loss-of-lock
- Replay — record-and-delay of legitimate satellite signals
- Narrowband suppression — targeted attacks on specific satellites
How It Works
YZ-9770 uses two defence layers — multi-source cross-validation and physical-layer anomaly detection:
- Parallel multi-GNSS solving: BeiDou + GPS + Galileo + GLONASS solved in parallel; deltas above threshold trigger isolation
- C/N0 + AGC + Doppler triple monitoring: any anomaly drops the receiver into holdover on a high-stability local oscillator
- Holdover oscillator / Rb option: < 1.5 μs over 24 h sans GNSS; < 0.3 μs with rubidium
- Spoof signature library: real-time matching against signatures collected from field exercises
Certifications
- Certified by SGCC EPRI (first of its class in China)
- Conforms to Q/GDW 11261-2014 timing-security provisions
- Compatible with the Power Monitoring Cyber Security Regulations (NEA Doc. 36)
Deployment Modes
- In-line: between antenna and master clock — anomalies blocked at source
- Tap / monitor: parallel monitoring with alarm-only output
- Dual hot standby: two YZ-9770s in mutual backup
Power grids, thermal & hydro plants, UHV converter stations, anti-drone systems, SOE critical infrastructure
First in China
YZ-9770 is the first product of its class certified by SGEPRI for satellite-timing security
Spoofing & Jamming Detection
Identifies and isolates GNSS spoofing, jamming and suppression in real time
Anti-drone Compatible
Pairs with anti-drone systems at power plants — meets Class-II counter-terrorism requirements
Continuous Monitoring
Sustained anomaly monitoring with alarm forwarding to O&M and on-duty systems
Standard Model
Catalogue-selectable YZ-9770
- Standard I/O
- Factory tested
- Standard warranty
Project Solution
Customised deployment per site topology and threat profile
- On-site threat assessment
- Topology design
- Integration & training
Long-Term Monitoring
Remote monitoring + alarm response
- Remote monitoring
- Alarm response
- Spare parts
- Inspection
Master-Slave Clock System
YZ-9200 master-slave clock: a YZ-9810 master clock disciplines via BeiDou/GPS and distributes to the entire site through network switches. Supplied alongside the YZ-9580 LED digital clock family (332S / 422S/D / 5S/D / 42S/D), 35cm analogue slave clocks and Wi-Fi wireless analogue / digital slave clocks — for hospitals, airports, stations, plants and office campuses.
Dispatch Auto-monitoring
YZ-8000 is a provincial-and-prefectural-integrated dispatch automation monitoring system. It safeguards the secure, stable and efficient operation of grid automation systems — providing centralised monitoring of dispatch control systems, auxiliary facilities and machine-room environments across provincial and prefectural dispatch centres.
NTP Time Server
Flagship YZ-9811. Delivers precision NTP / SNTP / PTP timing and timestamp services to compute systems, process control, e-commerce, B2B and database clusters. Widely deployed in government, finance, healthcare, broadcasting and telecom core sites — traceable to BeiDou and the National Time Service Centre BPL long-wave.
Time-Sync Monitoring
A monitoring & testing family for substations, power plants, dispatch centres and data centres. Flagship models: YZ-9100 monitoring system, YZ-9900 benchtop tester, YZ-9910 handheld tester. Combined with YZ-9880 satellite common-view timing devices for traceable cross-station synchronisation.
Time Sync Devices
Our flagship product line. 1U/2U/4U master/slave clocks with multi-source time fusion (BeiDou + GPS + IRIG-B(DC) + PTP + BPL long-wave) and dual-channel hot-standby. Includes the YZ-9846 (compliant with SGCC "Four-Unification" Class-II clock spec) and self-controllable single- / dual-BeiDou variants.
Find the right model
Our engineers combine your site topology, protocols and alarm logic to recommend the right model and customisation.