quantumdata M42de Video Analyzer/Generator

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Overview Overview
Highly Configurable Highly Configurable
Flexible Hardware Flexible Hardware
Features Features
Compliance Compliance
qdPrime qdPrime


The Teledyne LeCroy quantumdata M42de Video Analyzer/Generator provides an unprecedented combination of functional and compliance testing for video, audio and protocol layers for DisplayPort 2.1 source, sink and repeater devices. The M42de supports legacy DisplayPort HBR3 lane rates of 1.62, 2.7, 5.4, 8.1Gb/s and the new DP 2.1 UHBR lane rates of 10.0, 13.5 & 20.0Gb/s. Now enhanced to support DP80 connections over full size DisplayPort cables in addition to USB Type-C® cables, the M42de is your 'one-stop' solution for DP 2.1 testing and certification.

Highly Configurable

The quantumdata M42de is a highly configurable platform for testing DP 2.1 (and 1.4) source and sink devices with quick real-time views as well as full capture of main line video including meta data and AUX transactions. Invaluable for testing silicon development boards, displays, docking stations, hubs, USB-C adapters, retimers and extenders. The video generator offers a large library of standard video timings and test patterns necessary for easy verification of next generation displays. A complete API for automated testing is now available for compliance testing.

Flexible Hardware

The M42de supports generation and analysis of the DisplayPort data streams through the user-friendly Video Protocol Suite Manager. The M42de features an embedded CPU (linux-based) that operates as a stand-alone platform by connecting an HDMI monitor plus keyboard/mouse. Optionally an external laptop can be connected directly to the unit (via RJ45 LAN port) and control the analyzer as a remote PC. Both approaches provide fast access to captured video logs up to 8GB in size. The Passive Probe feature based on Teledyne LeCroy’s cutting-edge T.A.P.4™ technology, enables full monitoring of the DisplayPort Main Link and AUX Channel between two DisplayPort devices at the full 20 Gb/s lane rates. For developers of Embedded DisplayPort (eDP), the M42d offers fast link training, alternate scrambler seed, Advanced Link Power Management (ALPM) and Tx backlight control.

Key Features

  • Equipped with USB-C ports and new enhanced full-size DisplayPort (DP80) connectors for Tx and Rx functions
  • Fully supports UHBR sink and source testing at 10Gb/s, 13.5Gb/s and 20Gb/s lane rates with 128b/132b line coding
  • Supports a broad range of compliance testing for HBR3 and UHBR source, sink and branch devices in accordance with VESA DP 2.1 compliance test specifications
  • View incoming video and metadata (including DSC compressed) from a source device
  • Capture and decode video, protocol, control packets including Display Stream Compression (DSC) and Multi-Stream Transport (MST)
  • Custom video generator can test displays at HBR and UHBR lane rates with large format and image library
  • Configure link training parameters to test display’s handling of link training
  • Generate Display Stream Compression (DSC), select patterns and configure slices and video parameters
  • View and edit EDID and DPCD registers
  • Monitor AUX Channel transactions while emulating a DP 1.4 or DP 2.1 source or sink
  • Exclusive: T.A.P.4 passive monitoring mode provides visibility to Main Link and AUX Channel traffic for debug of interoperability issues between real DP 2.1 devices
  • Test source and sink devices with Panel Replay capability
  • Python-based automation API allows running compliance and custom verification tasks in unattended mode
  • Support for LTTPR in non-transparent mode for 128b/132b at UHBR rates and 8b/10b encoding for lane rates up to HBR3
  • View Power Delivery (PD) protocol negotiations for USB-C DP Alt Mode
  • qdPrime™ automatically test a huge range of DisplayPort configurations


Source Link Layer Compliance

The DP source link layer compliance option is ideal for pre-testing HBR3 or UHBR-capable devices prior to submission to an Authorized Test Center. Pre-testing is considered a critical step in assuring a smooth certification process. The optional compliance test packages allow users to view detailed results and help pinpoint the cause of any failures. AUX channel traces are also saved during Link Layer testing to provide a reliable record of AUX transactions.

Sink Link Layer & EDID Compliance

The DP sink EDID/DisplayID and Link Layer compliance option fully supports DP 1.4 certification and a growing list of DP 2.1 tests. Covering dozens of test cases and hundreds of assertions, the link layer CTS package is foundational for any engineering verification test effort. With essential tests for critical functions including training, forward error correction (FEC), power management and multi-byte AUX transactions, this base package is the starting point for comprehensive test coverage.

LTTPR Source, Sink & Retimer Compliance

The quantumdata M42de provides automated, one-button testing of Link Training Tunable Phy Repeater (LTTPR) compliance. Now with specific tests for HBR3 and UHBR-capable DisplayPort source, sink and retimer devices, the M42de mimics real LTTPR network behaviors to verify that sources can properly configure and link train in both transparent and non-transparent modes. Simple pass/fail reports are automatically generated and detailed AUX logs are captured which are invaluable for understanding issues during clock data switch phase, equalization, or inter-lane alignment.


The qdPrime test suite provides a huge library of quantumdata proprietary tests designed to verify DisplayPort functionality and interoperability for both sources and sinks. This optional feature systematically tests different combinations of lane-width, link rate, timing, refresh-rate, color-space, and bit depth to ensure devices operate properly with the DisplayPort 2.1 ecosystem. Each individual test generates a pass/fail result with detailed logs to provide a repeatable snapshot of device interoperability.

Instructional Videos and Demos

Protocol Analysis and Video Generation for DisplayPort 2.0
source and sink testing


Name Type  
quantumdata M42de Datasheet Download PDF


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quantumdata M42de User Guide Download PDF


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quantumdata M42de Quick Start Guide Download PDF


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quantumdata M42de Release Notes Download PDF

Release Notes

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quantumdata M42de Passive Monitoring Download PDF

White Paper

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qdPrime:Comprehensive, Automated Test Coverage for DisplayPort 2.1 Download PDF

White Paper

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View this webinar for a detailed training on Panel Replay mode for DisplayPort 2.1 and explore the latest power-saving features and protocol behaviors with a focus on testing and validating Panel Replay and its predecessor Power Self-Refresh 2 (PSR2) implementations.

View technical webinar for a complete briefing on the latest DisplayPort 2.1 compliance test specifications (CTS).

This webinar describes the capabilities of the Teledyne LeCroy Application Programming Interface (API) for controlling the quantumdata M42d/M41d and 980 series DisplayPort test instruments.

This webinar covers the operation of DisplayPort 2.0 Link Layer Protocols with LTTPR devices in a UHBR network and how to test LTTPR-capable devices for compliance.

DP 2.0 Link Layer & MST Source Compliance Test

Test link training and other functions at rates up to UHBR 20.0G rates. (95-00232)

DP 2.0 Link Layer & MST Sink Compliance Test

Run sink link layer compliance tests which test the link training and other functions at rates up to UHBR 20.0G rates. (95-00233)

DP Adaptive Sync Source and Sink Compliance Test

Run source and sink compliance tests on Adaptive Sync capable sink and source devices at HBR3; UHBR rates in active development (Source: 95-00234; Sink: 95-00235)

DP LTTPR-Capable Source Compliance Test

Run compliance tests on LTTPR-capable source devices at rates up to UHBR 20.0G rates. (95-00240)

DP LTTPR-Capable Sink Compliance Test

Run compliance tests on LTTPR-capable sink devices at rates up to UHBR 20.0G rates. (95-00241)

DP LTTPR Devices Compliance Test

Run compliance tests on LTTPR devices at rates up to UHBR 20.0G rates. (95-00242)

DP 1.4 Link Layer Sink Compliance Test

This compliance test package includes HBR3 sink link layer compliance tests which test the link training and other functions at rates up to HBR3. Tests from the following Sections are supported: Aux Chan protocol 5.2.1, Link Training 5.3.1, Link Maintenance 5.3.2, Main Video 5.4.1/2, Main Audio 5.4.4, Power Management 5.4.3 and Forward Error Correction (FEC) 5.5.1.

DP 1.4 DSC/FEC Source Compliance Test

Run Display Stream Compression (DSC) and Forward Error Correction (FEC) compliance tests on your DisplayPort source device. (95-00236)

DP 1.4 DSC/FEC Sink Compliance Test

Run Display Stream Compression (DSC) and Forward Error Correction (FEC) compliance tests on your DisplayPort sink device. (95-00237)

HDCP 2.3 Compliance tests

Run HDCP 2.2/2.3 on DisplayPort sources, sinks and repeaters. (Source: 95-00214; Sink:95-00217)

DisplayPort Capabilities
DisplayPort Version

DP 2.1

Standard Formats



DisplayPort, Display Stream Compression (DSC) with FEC, HDCP, MST

Video Data Rates

1.62, 2.7, 5.4 & 8.1Gb/s at 1, 2, 4 Lanes; 10, 13.5, 20Gb/s at 4 lanes

Color Depths

8, 10, 12 & 18 bits per component

Video Sampling Modes

4:4:4, 4:2:2, 4:2:0


8 Channel LPCM programmable sine wave



Capture Memory


Connectors - Front
DP Standard

Tx (1); Rx (1)


Tx (1); Rx (1); supports DP Alt Mode

eDP Header

Pins to access eDP Tx backlight controls

USB (2)

Used for connecting keyboard and mouse for Advanced Test Platform GUI

Connectors - Back
HDMI Connector

Out/Tx HDMI Type A; Category 2. Used for connecting external display for Advanced Test Platform GUI

USB (2)

Used for connecting keyboard and mouse for Advanced Test Platform GUI and for external storage

RJ-45 E1

For admin control over LAN from computer running the Advanced Test Platform GUI

RCA (2)

SPDIF IN for injecting audio (future); SPDIF OUT for extracting incoming audio

All other Connectors

Reserved for future use.


100-240 VAC, 50-60 Hz, 200 Watts


7.6 LBS; 5.057 Kg


Height: 3.44 in. (8.74 cm) Width: 9.57 in. (24.30 cm) Depth: 10.94 in. (27.79 cm)


2 RU mounts in 19 inch rack with mounting brackets (provided)

Internal Speaker

Speaker with volume control for monitoring incoming audio

Command Line Control

Ethernet (RJ-45) for external GUI and telnet.
Or, Keyboard/mouse connected to USB ports with external display at HDMI or DisplayPort admin port.


Operating Temp: 32 to 104 (F); 0 to 40 (C)

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