T-ASJ20 GNSS Timing Safety Isolation Device
Learn about our space-time safety isolation devices
The T-ASJ20 GNSS timing security isolation device is designed for scenarios such as GPS signal failure, interference, or spoofing. By utilizing a local Beidou timebase, simulated signals, and system isolation protection, it provides a secure time base for industries such as communications and power. The device supports protection against forwarding, generation, and intrusive interference, and features built-in local clock training and timebase holdover, ensuring better than 100ns timing accuracy even in the presence of external signal anomalies. It automatically switches to Beidou timing, offering seamless switching and real-time monitoring and alarming capabilities. Interference onset and removal times are less than 15s and 180s, respectively, and it can be remotely configured and upgraded online.
Applicable fields: power transmission, power generation, substation, finance and securities, communications, transportation, national defense, etc.

Important Features
- Possesses protection capabilities against various interference and deceptive signals such as forwarding, generation, and intrusion
- Supports non-sensing reinforcement protection, enabling smooth switching of timing reference from GPS to BeiDou
- Support clock taming and synchronization, output real GPS/Beidou synchronization signal
- Support satellite signal anomaly monitoring and alarm output functions
- Support remote monitoring, configuration, online upgrade and other functions
- Support high-precision timekeeping function
System Block Diagram
Important Features
Parameter | explain |
---|---|
Operating frequency band | Receive Beidou B1 and B3 frequencies, transmit GPS L1 and Beidou B1 frequencies |
Output power | -90dBm ~ -125dBm |
Timing accuracy | ≤ 100ns |
Ability to maintain punctuality | Not less than 1 hour (clock time better than 500ns) |
Interference and deception alarm time | Less than 15 seconds |
Interference and deception removal time | Less than 180s |
Timing output | 1Hz |
Timing signal protection | Supports passive encryption protection and seamless switching from GPS to Beidou timing |
Resistant to retransmission, generation, intrusive jamming, and spoofing signals | |
Local clock synchronized with reference | With local clock taming and reference synchronization functions |
Output high-precision signals synchronized with real GPS/Beidou | |
Front panel | Displays year, month, day, hour, minute, and second, GPS and Beidou satellite deception and interference status, and two-way power supply status. |
Rear panel | Dual power input and independent control switch, 1 satellite signal input, 1 10MHz and 1PPS input, 1 10MHz and 1PPS output, 1 safety signal output, and 1 alarm information output. |
Physical and environmental parameters | |
size | 447×44×370mm |
power supply | Redundant 220V ± 20% 47Hz ~ 63Hz |
Working temperature | -10 ~ +55°C (host) -40 ~ +75°C (antenna) |
Storage temperature | -45°C ~ +85°C |
humidity | 95% non-condensing |
Power consumption | 30W |
Weight | 3Kg |