VIAVI TestCenter dX3 DX3-QSFP-DD-2 400G 2-Port QSFP-DD Test Module

2-port QSFP-DD TestCenter test module for SPT-N12U and SPT-N4U chassis, 400G to 10G with PAM4 and NRZ encoding

MSA interface: QSFP-DD
Operational modes: PAM4: 400/200/100/50G; NRZ: 100/50/40/25/10G
Per-port configurations: PAM4: 1x400G, 2x200G, 4x100G, 8x50G; NRZ: 2x100G, 4x50G, 2x40G, 8x25G, 8x10G
Maximum ports per slot (DX3-QSFP-DD-2-825A, -750A): 2/4/8/16

Datasheet

Overview

The VIAVI dX3 400G 2-port module (DX3-QSFP-DD-2) is a single-slot QSFP-DD test module for the TestCenter chassis architecture. Each port can be configured for seven speeds, 400/200/100/50/40/25/10G, with PAM4 and NRZ encoding. Auto Negotiation and Link Training are supported at all speeds, including 8x50G mode.

The module installs in VIAVI SPT-N12U and SPT-N4U chassis. A single N12U holds up to 24 400G ports and an N4U holds 4. New hardware speed options are enabled by software license, without returning the module to the factory.

Key Features

Complete 400G Ethernet testing across QSFP-DD interfaces
Integrated Layer 2–3 validation on a single platform at full line rate
Precise, repeatable latency, jitter, throughput, and loss measurements
Validation of 100G/200G to 400G migration across multi-vendor ecosystems
Regression testing for software, hardware, and topology changes
2 400G QSFP-DD ports per single-slot module
Each port supports PAM4 1x400G, 2x200G, 4x100G, 8x50G
Each port supports NRZ 2x100G, 4x50G, 2x40G, 8x25G, 8x10G
4x100G (QSFP28) operation with ACC-1067A accessory cable
Ethernet FEC, Auto Negotiation and Link Training on all speeds including 8x50G mode
Hardware speed option upgrades via licensing
Protocol testing for L2/3 routing/switching and data center test cases

Specifications

General

MSA interface	QSFP-DD
Operational modes	PAM4: 400/200/100/50G; NRZ: 100/50/40/25/10G
Per-port configurations	PAM4: 1x400G, 2x200G, 4x100G, 8x50G; NRZ: 2x100G, 4x50G, 2x40G, 8x25G, 8x10G
Maximum ports per slot (DX3-QSFP-DD-2-825A, -750A)	2/4/8/16
Maximum ports per SPT-N12U chassis (DX3-QSFP-DD-2-825A, -750A)	24/48/96/192
Maximum ports per SPT-N4U chassis (DX3-QSFP-DD-2-825A, -750A)	4/8/16/32
Maximum ports (DX3-QSFP-DD-2-400A)	2 per slot; 24 per SPT-N12U; 4 per SPT-N4U 400G only
Port CPU	Stackable multi-core CPU
User reservation	Per QSFP-DD port
Test port speed configuration	2 test port speed groups per blade

Timing and Synchronization

Line clocking	Stratum-3 rated oscillator is the default time source Transmit line clock ± < 1 PPM on initial shipment; accurate to ± 4.6 PPM 15 years of operation
Frame time-stamp resolution	2.5ns
Inter-chassis synchronization	± 20ns Modules in the same chassis are phase-locked to the control module timing source

Layer 2-3 Generator and Analyzer

Number of streams	Stats/Streams @400/200/100/50/40/25/10G: Tx=8k, Rx=16k
Frame transmit modes	Port-based (rate per port), stream-based (rate per stream), burst, timed
Min/max frame size (w/CRC)	60 to 16,004
Min/max Tx rates	1 packet per 3.43 seconds to 101% of line rate
Per-stream latency statistics	Min, Max and Average Latency (4K streams)
Transmit timestamp resolution	2.5 ns With intra-chassis and inter-chassis synchronization
Supported encapsulations	Layer 2: Ethernet II, 802.1Q, 802.1ad, FCoE; Layer 3/4: IPv4, IPv6, TCP, UDP
Capture buffer size	8 MB per port
Latency modes	LIFO, LILO, FIFO or FILO Benchmark tests latency calculation methods
Route Insertion Table (RIT) entries per port	8K 4-byte entries for dynamic label or random IP/MAC address assignments
RIT or list VFD entries per stream	8 RIT insertions per stream and 4 VFD insertions per stream

Layer 1

QSFP interconnects	SR, LR, FR, DR, PSM4 at multi-rate (400/200/100/50/40/25/10G)
PAM4 FEC	RS-FEC (544) KP all speeds
NRZ FEC	Clause 74 BASE-R FEC, Clause 91 RS-FEC, and Clause 108 RS-FEC NRZ support varies by module speed mode and license
AN/LT (enable/disable)	Direct Attach Copper (DAC), AN/LT supported for all speeds including 8x50G mode
Layer-1 debug tools	CR Tx Emphasis settings, Rx Eye view, FEC Counters, PRBS Gen/Check, Front-end L1 Summary Status, Xcvr MDIO access

Physical and Environmental

Module weight	3.219 kg, 5.45lbs.
Module predicted MTBF	56,330 hours of continuous operation
Operating temperature range	41° to 95° F (5° to 35° C) Ambient temperature; 20% to 80% relative humidity
Max power draw per module	Maximum of 450W per slot

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

Data center fabric validation
Service provider and core network testing
Interoperability and acceptance testing
Pre-deployment and regression validation
Cloud computing and streaming services
Data center ToR and EoR switches and fabrics
Terabit routers

Options & Accessories

Option	Description
DX3-QSFP-DD-2-825A	dX3 400/200/100/50/40/25/10G QSFP-DD 2-Port
DX3-QSFP-DD-2-750A	dX3 400/200/100/50G QSFP-DD 2-Port
DX3-QSFP-DD-2-400A	dX3 400G QSFP-DD 2-Port
UPG-NRZ-DX3-400G-T2	Factory Upgrade NRZ 400G QSFP-DD 2-Port — Requires 8x50G-AN/LT-compatible hardware
ACC-1067	Active Copper Breakout QSFP-DD to 4XQSFP28 3M — High density 100G QSFP28; also requires BPK-1378 QSFP-DD to 4xQSFP28 chassis license
SPT-N12U-110	N12U chassis and controller with 110VAC power supplies
SPT-N12U-220	N12U chassis and controller with 220VAC power supplies
SPT-N12U-220-LC	N12U-LC chassis and controller with 220VAC power supplies
SPT-N4U-110	N4U chassis and controller with 110VAC power supplies
SPT-N4U-220	N4U chassis and controller with 220VAC power supplies