Time Synchronization Connector Specifications

NT100A01-NEBS Installation

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Napatech SmartNIC
category
Hardware Installation Guide

Time synchronization

Characteristic Description
Time synchronization connectors

External: SMA female coax connector (see MCX- and SMA-based inputs) and RJ45 10/100/1000BASE-T connector (see RJ45 10/100/1000BASE-T connector)

Internal: MCX female coax connector (see MCX- and SMA-based inputs)

Location
NT100A01-NEBS showing all time synchronization connectors

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.

MCX- and SMA-based inputs

This table specifies the time synchronization input interface for the MCX- and SMA-based inputs on the NT SmartNIC (the internal and external inputs, respectively).

Mode Type Parameter Value
Power off/ Interface off Termination 100 kΩ DC
Current in clamping circuit 60 mA @ 5 V input
Note: This only applies to external SMA-based inputs and not to internal MCX-based inputs.
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
Note: This only applies to internal MCX-based inputs and not to external SMA-based inputs.
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

RJ45 10/100/1000BASE-T connector

Supports precision time protocol (PTP) over Ethernet with data transfers of 10, 100 or 1000 Mbit/s.

Available time synchronization cables

For information on available time synchronization cables, see DN-0186 on docs.napatech.com (the Napatech Documentation Portal).