Time synchronization
Characteristic | Description |
---|---|
Time synchronization connectors | External: SMA female coax connector (see SMA-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.
Warning: Connecting incompatible signal sources to NT time synchronization input
interfaces might damage the NT SmartNIC hardware.
When a time synchronization input is configured for PPS signals, the rising edge is interpreted as on time.
SMA-based inputs
This table specifies the time synchronization input interface for the SMA-based input 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 on docs.napatech.com (the Napatech Documentation Portal).