T220-B PCIe B-code timing card
Learn about our PC timing solutions
The T220-B PCIe B-code timing card provides high-precision time information for computer systems. Using B-code time information as a time reference, the card transmits time information and timer interrupt signals to the computer via the PCIe interface, synchronizing computer software time with the card's time. It supports two B-code signal inputs and automatically switches to the other B-code source if one fails. Even if all reference time sources are disconnected, the card's internal high-stability crystal oscillator maintains continuous operation within a specified accuracy range for a specified period of time, thus continuing to provide a relatively accurate time signal to the computer system, significantly improving the product's reliability.
Applicable fields: scientific research measurement, communications, electricity, transportation, industrial automation, etc.

Important Features
- Supports two-way B code (DC) time information input
- Reference time source master/slave switching, automatic or manual switching
- Onboard frequency source optional (temperature compensated crystal oscillator, constant temperature crystal oscillator)
- Multiple timing functions
- Support Windows and Linux systems, providing rich software interfaces
- API provides multiple soft timing interrupts and time matching interrupts
Important Features
Test Item | Specifications/Parameters | explain |
---|---|---|
Time reference source | Number of way: 2-way | |
Standard: IRIG-B DC | GJB2991-2008 Standard/IEEE | |
System accuracy: 100ns (TCXO: 100us) | ||
Connection method: RJ45 | ||
Output | 1PPS pulse: 1-way | Connection method: RJ45 |
Timed interval interrupt | Pulse: 4 channels independent settings | Period: 100us – 10000s |
Accuracy: 1us | ||
Software Features | Timer alarm interrupt | 4-channel independent settings |
Delayed timer interrupt | 4-channel independent settings | |
Stepping: 1us | ||
Supported operating systems: Windows 64/32bit, Linux | Provides standard soft interrupt API library functions and test routines | |
Local clock | Type: OCXO | |
Steady-state accuracy: ≤2E-8 (factory calibration), can be manually calibrated or tamed | ||
Short-term stability: ≤5E-11/1s | ||
Aging: ≤5E-10/day | ||
interface | Number of way: 2-way, B-DC (RS422) | Impedance: 100Ω |
Interface - PCIe | Width: X1, compatible with X4/X8/X16 | Speed: compatible with GEN2 (5Gbps), GEN1 (2.5Gbps), GEN3 (8Gbps) |
Physical and environmental parameters | Power supply: PCIe slot power supply | |
Size: PCIex1 half-height or full-height card specifications | ||
Operating temperature: -20°C ~ +80°C | ||
Storage temperature: -40℃ ~ +85℃ | ||
Humidity: 95% non-condensing |
System Block Diagram
