home >> Gnss synchronization server >> T711 Comprehensive time series, unified server, and compreheTime Unified Server
Product Description:
The T711 Comprehensive Timing System is a complete redundant backup high-precision time and frequency system that supports multiple timing methods, including BeiDou/GPS/GLONASS. It is equipped with a high-precision rubidium atomic clock, dual-slot temperature-compensated crystal oscillator, redundant power module, and multiple optional functional module outputs. The device features a fully modular and highly reliable redundant design.
The time is synchronized to the cesium atomic clock on the BeiDou/GPS/GLONASS satellite, and once locked, the device's performance approaches the specifications of a cesium atomic clock with low drift and no need for calibration. It is widely used in high-reliability and high-precision time and frequency applications in defense, military, power, communications, and transportation industries.
As a primary clock source, the T711 offers various satellite reference modes, with frequency accuracy better than 1E-12 and relative UTC time synchronization accuracy better than 30ns after satellite lock. The T711 provides an external synchronization interface for connecting high-precision frequency signal disciplining systems to the internal rubidium atomic clock or temperature-compensated crystal oscillator unit. The device also supports local clock redundancy backup to enhance system reliability. It can also serve as a secondary extended clock for distributed time synchronization deployments.
The T711 Comprehensive Timing System intelligently analyzes the stability of the BeiDou, GPS, and GLONASS satellite reception systems and automatically switches to the optimal satellite reference source. It can also be manually set to prioritize reference sources or specify a single reference source. In the event of interference to all reference sources, the system automatically switches to the local clock mode and continues to provide highly reliable time and frequency signal outputs based on satellite disciplining characteristics. Once any satellite reference source is restored to normal, the system automatically switches back to the external satellite reference mode.
Key Features:
- Built-in high-performance imported rubidium atomic clock and low-phase noise crystal oscillator
- Frequency calibration of the rubidium clock using BeiDou/GPS
- High-precision timing receiver
- Daily average accuracy <1E-12
- Automatic switch to holdover mode when BeiDou/GPS signals are lost
- Excellent long-term and short-term stability
- Optional support for high-precision 100MHz/80MHz low-phase noise frequency signal output suitable for radar applications
NTP Interface:
- Network Protocols: NTP v2, v3, v4; Conforms with RFC5905
- SNTP v3, v4: Conforms with RFC9505
- Synchronization Accuracy for User Terminal: 0.5-2ms (typical)
- User Capacity: Supports tens of thousands of clients
- NTP Request Rate: 2000 requests/second
- Can connect to another NTP server to form a 2-level clock
- Supports 1000 log records
PTP Interface:
- Network Protocols: PTPv2 (telecom profile, hybrid mode)
- PTP: Master-slave synchronization accuracy: 10ns; User terminal synchronization accuracy: 100ns (general network card)
- Supports 256 PTP unicast clients with no limit on multicast clients
TOD Interface:
- 1 channel, DB-9 Female, GPGGA, GPRMC sentences for BeiDou/GPS information
- Baud Rate: 9600, Data Bits: 8, Parity: None, Stop Bits: 1
VFD Display:
- Displays lock status and time information
Indicators:
- Power status, BeiDou/GPS status, lock, output
Operating Modes:
- BeiDou/GPS lock mode, holdover mode with automatic switching
Timing GPS/BeiDou Receiver:
- Frequency: GPS L1; BD2
B1
- System Modes (configurable):
- Single BeiDou positioning mode
- Single GPS positioning mode
- GPS/BeiDou hybrid positioning mode
- Channels: 32 channels
- First Positioning Time: Cold Start: <35s; Hot Start: <1s, Reacquisition: <1s
- Timing Accuracy better than <20ns
- Positioning Accuracy: 3m (RMS)
- Velocity Accuracy: 0.1m/s
Physical and Environmental Parameters:
- Dimensions: 19-inch 2U rack-mount chassis, 420mm×89mm×300mm
- Weight: <4.5Kg
- Power Supply: AC 220V±20% 47Hz ～ 63Hz
- Operating Temperature: -10℃ to +50℃
- Storage Temperature: -30℃ to +60℃
- Humidity: 95% non-condensing
- Power Consumption: ≤40W
- Complies with GJB2242-94 "General Specification for Timing Equipment" 3.9.1 regarding electromagnetic compatibility
Standard Configuration:
- Main Unit: 1 unit
- High-sensitivity timing antenna: 1 unit
- 50-meter cable: 1 piece
- 1-meter power cord: 1 piece
- Serial cable: 1 piece
- User manual (in Chinese): 1 copy
- 1-meter signal cable: 1 piece
Optional Configurations:
- Multiple routes of 10MHz, 5MHz, 1MHz extended outputs
- Multiple routes of 2.048MHz, E1 signal extended outputs
- Lightning arrester, extension cables (50m, 80m, 100m, etc.)
- Customizable 485, 422, and other information outputs; redundant power supply options: 48V, 24V, 12V, etc.
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TECHNICAL INDEX |
| Item | Technical Specifications |
|---|---|
| Output Frequency | 1MHz, 5MHz, 10MHz |
| Output Quantity | 2 channels each |
| Signal Amplitude | >+8dBm |
| Output Impedance | 50Ω |
| Harmonic Suppression | <-40dBc |
| Spurious Suppression | <-100dBc |
| Connector Type | BNC |
| Frequency Accuracy (12h) | <1E-12 |
| Sync Accuracy | <50ns |
| Hold Accuracy (24h) | <100ns |
| Frequency Stability (10MHz) | |
| 1s | ≤1.5E-11 |
| 10s | ≤5.0E-12 |
| 100s | ≤2.0E-12 |
| 100000s | ≤3.0E-13 |
| Phase Noise (10MHz) | |
| 1Hz | -80dBc/Hz |
| 10Hz | -90dBc/Hz |
| 100Hz | -130dBc/Hz |
| 1kHz | -140dBc/Hz |
| 10kHz | -145dBc/Hz |
| Output Pulse Signal | |
| Output Frequency | 1PPS |
| Output Quantity | 2 channels |
| Signal Amplitude | >3V |
| Pulse Width | 10us |
| Rise Time | <2ns |
| Jitter | <50ps |
| Connector Type | BNC |
| Load Impedance | 50Ω |
| Output B-Code (DC) | |
| Output Quantity | 2 channels |
| Signal Amplitude | 5V |
| Sync Accuracy | ≤50ns |
| Connector Type | BNC |
| Load Impedance | 50Ω |
| Output B-Code (AC) | |
| Output Quantity | 2 channels |
| Signal Amplitude | 0.5V to 10V adjustable |
| Sync Accuracy | <10us |
| Modulation Ratio | 2:1 to 6:1 adjustable |
| Connector Type | BNC |
| Load Impedance | 50Ω |
Documentation
T711 Comprehensive time series, unified server, and comprehe【PDF】data
PDF
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PNT stands for Positioning, Navigation, and Timing
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Bd Star is a national high-tech enterprise specializing in Beidou GPS timing and navigation industry. The company is dedicated to the research and development, design, production, and sales of system solutions such as standard time timing
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