T221-C PCIe 授时卡

Implement nanosecond-level server timing solution

T221-C PCIe授时卡面向现代服务器、工控及边缘计算平台，采用基于Time Appliances Project的开源架构，通过FPGA实现硬件可调时钟、PPS与TOD同步、时间戳及频率测量等功能，为主机提供独立高精度时间基准。板卡内置u-blox LEA-M8T多星座GNSS接收机与高稳驯服时钟，可将卫星时间稳定输出为1PPS与10MHz信号，并在GNSS失锁时保持守时连续性。通过Linux驱动可提供PHC与PPS设备接口，结合ptp4l、phc2sys及chrony等软件构建PTP主时钟、从时钟及边界时钟体系。前面板提供GNSS天线及多路SMA时频接口。

适用于数据中心、通信、电力、金融交易、广播、科研测量及工业控制等时间敏感型应用。

Important Features

Support GPS and Beidou receivers
Supports time distribution protocols such as IEEE 1588 (PTP)
20 nanosecond synchronization accuracy suitable for modern time-sensitive network needs
Support external IRIG, TOD, 1PPS input
Easy integration using standard PCIe slots
Support external timestamp and signal generation
FPGA architecture provides flexibility and scalability

Important Features

Product Features	Specification name	Indicator parameters
Input signal	satellite timing	GPS, BD multimode receiver; supports L1 and B1 frequency points; synchronization accuracy ≤ 30ns(RMS); connection method SMA.
	PTP	1 way; IEEE1588v2-2008; Accuracy better than 100ns (back-to-back); Transmission mode UDP, ETH; Timing mode E2E, P2P; Connection mode RJ45 (customizable SFP); Supports SyncE master-slave mode.
	IRIG-B (optional)	1 way (DC); RS422; IEEE1344/GJB2991-2008; phase shift ±1000ns; synchronization accuracy better than 100ns.
	1PPS+TOD (optional)	1 way; TTL (1PPS)/RS232 (TOD); Format ZDA statement, NMEA0183; Synchronization accuracy better than 100ns.
Output signal	1PPS Pulse	1 way; TTL; Accuracy ≤ 30ns (RMS locked); Pulse width 1~999ms settable; Phase shift ±1000ns; SMA 50Ω.
	PTP	1-way; IEEE1588v2-2008; accuracy better than 100ns (back-to-back); UDP, ETH; E2E, P2P; RJ45 (customizable SFP).
	NTP	2 ways (shared with PTP interface); V1/V2/V3/V4; support MD5 encryption; precision ≤ 10ms; performance ≥ 10000 times / s.
	IRIG-B (optional)	1 way (DC); RS422; IEEE1344/GJB2991-2008; phase shift ±1000ns.
	TOD (optional)	1 way; RS232; ZDA statement, NMEA0183.
	10MHz (optional)	1 channel; sine wave; amplitude ≥ 5dBm; SMA 50Ω.
Software Features	cyclicality is interrupted	4 channels independent setting; period 100us~10000s; step 1us.
	Timer alarm interrupt	4-channel independent setting; 1us step.
	Other Functions	PC synchronization, API to read board time, webpage online upgrade.
	System Support	1-way support for Windows 64/32 bit, Linux, Kirin operating systems; provides drivers and API interface functions; can be customized for VxWorks, Windows RTX and other operating systems.
	bus interface	X1, compatible with X4/X8/X16; GEN2 (5Gbps), compatible with GEN1 (2.5Gbps), GEN3 (Gbps).

System Block Diagram

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