Time Synchronization Connector Specifications

NT80E3-2-PTP-NEBS Installation

Platform
Napatech SmartNIC
Content Type
Hardware Installation Guide

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
NT80E3-2-PTP-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-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.

Supported input and output:
  • 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).