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T220 GPS Beidou Clock Module
Time synchronization

T200 GPS/BeiDou Dual-Mode Temperature-Compensated Crystal Oscillator (OCXO) Synchronous Clock Module is a highly integrated GPS/BeiDou dual-mode disciplined temperature-compensated crystal oscillator time synchronization server module. The module integrates Russian-imported dual-slot temperature-compensated OCXO and high-precision GPS/BeiDou dual-mode OEM boards. It utilizes a large-scale high-speed FPGA integrated circuit as the main processing chip, with an internal clock frequency of up to 320MHz, high-speed AD/DA chips, and a high-precision time-frequency control algorithm based on phase-locked loop (PLL) technology to generate and transmit accurate and stable time and frequency signals (10MHz, 1PPS, TOD).

The daily average frequency accuracy is <1E-12, and real-time accuracy can reach 2E-10, with timekeeping accuracy better than 1μs per hour. It is suitable for integration into transmitters, various instruments, DVB, DAB, CMMB, DTMB, WiMAX, CDMA, and other systems that require stringent time and frequency requirements, providing high-precision time and frequency reference signals for the systems.

The T200 module combines signals from various satellite navigation systems and can optionally be equipped with multiple GPS/BeiDou dual-mode positioning or timing modules from different manufacturers (up to three modules). By employing a rational fusion algorithm, it achieves better time and frequency performance compared to single-system, single-positioning module solutions. The module uses multiple same-frequency phase-shift frequency signals for OCXO disciplining, enhancing control precision. It provides reliable timekeeping and frequency signals, generating recurring 1PPS and time signals when satellite signals cannot be received, ensuring adaptability to short-term signal loss situations. The module offers various time release interfaces to meet various external application requirements.

Frequency and 1PPS generation technology combining frequency modulation and phase modulation:

The 1PPS time information is obtained by dividing the GPS-disciplined OCXO's 10MHz signal by 10,000,000 and merging it with the 1PPS signal generated by the GPS/BeiDou module. This fusion results in 1PPS with excellent short-term and long-term stability. The module employs a combination of frequency modulation and phase modulation techniques for frequency control, ensuring frequency accuracy while maintaining consistency between frequency phase and 1PPS phase. This feature is particularly suitable for demanding applications such as digital video broadcasting (DVB) and CDMA.

Technical Specifications:

Output Signals:

- 10MHz: 3 channels, SMA interface, sine wave, 3.3V, TTL level, 50Ω

- Frequency Accuracy: <1E-12 (GPS or BeiDou 2nd generation locked, 24-hour average)

- Holdover Accuracy: <2E-10 (both GPS and BeiDou 2nd generation are disconnected, holdover within 24 hours)

- Stability: 1s <2E-12

- Phase Noise:

- 1 Hz: -100 dBc/Hz

- 10 Hz: -125 dBc/Hz

- 100 Hz: -140 dBc/Hz

- 1 kHz: -145 dBc/Hz

- 10 kHz: -150 dBc/Hz

- 1PPS: 3 channels, SMA interface, 3.3V, TTL level, 50Ω

- Timekeeping Accuracy: 15ns (RMS) with GPS or BeiDou 2nd generation locked

- Rising Edge Time: <8ns

- Duty Cycle: 1:100 (can be specified)

- TOD Signal: 1

channel, TTL level, NMEA-0183 compatible with BeiDou protocol format and content, 9600-N-8-1

- GPS/BeiDou Receiver: 64 parallel channels for GPS L1, BDS B1 OEM board

- Motorola M12MT+ series GPS module (optional)

- Receives GPS L1, BDS B1, with time accuracy of 20ns (RMS)

- DOCXO (Double Oven-Controlled Crystal Oscillator): Aging rate 5E-8~1E-8, optional

- WEB Network Management:

- Real-time monitoring of system status, including RAM, CPU utilization, processes, CPU average load, disk partition information, normal system operation time, and running time.

- Displays system information, including host names, operating system kernel versions, memory, CPU information, system timed tasks, etc.

- Real-time monitoring of network port transmission rates, network connections, ARP cache tables, and network port bandwidth display.

- Allows direct queries of the IP addresses and login dates of the most recent servers logged in, along with information about the currently logged-in accounts.

Key Features:

● Built-in high-performance dual-slot temperature-compensated crystal oscillator

● Automatic calibration of crystal oscillator frequency using GPS/BeiDou

● Flexible selection of various GNSS receivers

● Daily average accuracy <1E-12

● Automatic switch to holdover mode when GPS/BeiDou signals are lost

● Frequency and 1PPS generation technology combining frequency modulation and phase modulation

● Communication IoT (Internet of Things)

● Digital TV/Broadcasting networks

● 3G/4G/LTE networks

● Aerospace and aviation applications

● Defense and military applications

● Power communications

● Excellent long-term and short-term stability simultaneously

Physical and Environmental Parameters:

● Dimensions: 146X 102 X 40 mm

● Weight: 500g

● Power Supply: 15~22V DC

● Operating Temperature: -10℃ to +50℃

● Storage Temperature: -25℃ to +85℃

● Humidity: 95% non-condensing

● Power Consumption: Startup <20W, Operation <8W

● Complies with the electromagnetic compatibility provisions in Section 3.9.1 of GJB2242-94 "General Specifications for Timekeeping Equipment."

Standard Configuration:

● Dual-mode clock module: 1 unit

● 30 CM SMA to BNC adapter cable: 1 set

● 30-meter BNC GPS/BeiDou antenna with bracket: 1 unit

Optional:

● Supports multiple RS485, RS422, 1PPS, 1PPM, 1PPH, IRIG-B AC, IRIG-B DC code outputs.

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PNT stands for Positioning, Navigation, and Timing
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
Experienced
BdSTAR TIME seamless switching technology for redundant reference sources includes several technical components such as high-precision phase-shifting technology, reference clock, FPGA, integrated analog stretching, asynchronous serial communication, parameter storage, and master clock output.
Requirement customization
The core technology team of the company has many years of research and development experience in the field of timing and frequency. They possess multiple key core technologies in high-precision timing, PNT combination, frequency measurement, control, optical fiber time-frequency transfer, recovery, and maintenance.
Philosophy
"Our team of experts is committed to providing you with the best industry solutions, reducing project costs, and saving your valuable time. Additionally, our ability to design and use various timing and navigation components enables us to develop customized products for various special applications."

T220 GPS Beidou Clock Module
Time synchronization