Time synchronization
| Characteristic | Description |
|---|---|
| Time synchronization connectors |
External: Tyco Industrial Mini connector (see Tyco Industrial Mini connector) Internal: MCX female coax connector (see MCX-based inputs) |
| Location |
|
Input considerations
The time synchronization input interfaces of the NT SmartNICs are supplied with limited protection.
The time synchronization inputs on the NT SmartNICs do not fully support NT-PPS time synchronization output signals.
When a time synchronization input is configured for PPS signals, the rising edge is interpreted as on time.
MCX-based inputs
This table specifies the time synchronization input interface for the MCX-based inputs on the NT SmartNIC (the internal inputs).
| Mode | Type | Parameter | Value |
|---|---|---|---|
| Power off/ Interface off | – | Termination | 100 kΩ DC |
| 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 | ||
| NT-TS mode | In | Termination | 50 Ω AC |
| Rise/fall time | 0 – 30 ns | ||
| Input levels | LVCMOS 2.5 V levels | ||
| Pulse width | Proprietary NT protocol | ||
| Current in clamping circuit | 130 mA @ 5 V input | ||
| Out | Rise/fall | 0 – 10 ns | |
| Output levels | LVCMOS 2.5 V levels | ||
| Pulse width | Proprietary NT protocol |
Tyco Industrial Mini connector
Supports precision time protocol (PTP) over Ethernet with data transfers of 10 or 100 Mbit/s.
- PPS/TTL level in 50 Ω
- NT-TS
Available time synchronization cables
For information on available time synchronization cables, see DN-0186 on docs.napatech.com (the Napatech Documentation Portal).