Time synchronization
| Characteristic | Description |
|---|---|
| Time synchronization connectors | External: SMA female coax connector (see SMA-based I/O) |
| Location |
Input considerations
The time synchronization input interfaces of the SmartNICs are supplied with limited protection.
Warning: Connecting incompatible signal sources to time synchronization input
interfaces might damage the SmartNIC hardware.
When a time synchronization input is configured for PPS signals, the rising edge is interpreted as on time.
SMA-based I/O
This table specifies the time synchronization input interface for the SMA-based input and output on the NT SmartNIC (the external input).
| Mode | Type | Parameter | Value |
|---|---|---|---|
| Power off/ Interface off | – | Termination | 100 kΩ DC |
| Current in clamping circuit | 60 mA @ 5 V input | ||
| PPS mode | In | Termination | 50 Ω DC |
| Rise/fall time | 0 – 30 ns | ||
| Input levels | Rising edge, TTL levels | ||
| Pulse width | 1 µs – 999 ms | ||
| Current in clamping circuit | 130 mA @ 5 V input | ||
| Out | Rise/fall | 0 – 10 ns | |
| Output levels | Rising edge, TTL levels @ 50 Ω load | ||
| Pulse width | 67 ms |
Available time synchronization cables
For information on available time synchronization cables, see DN-0186.