Common Devices Under Test

DP physical layer testing is typically applied to the following product types:

• Monitors
• Graphics Cards
• Notebooks/Ultrabooks
• Motherboards and Embedded Systems
• Adapters and Docking Stations (e.g., USB-C to DP adapters)
• Cables and Connectors

DP Test Specifications

Key test specifications include:

• Electrical Characteristics: Such as voltage swing, steady-state levels, signal impedance matching, etc.
• Timing Parameters: Including data setup time, hold time, clock skew, etc.
• Signal Integrity: Such as eye diagram quality, jitter, crosstalk, etc.
• Environmental Requirements: Such as the impact of temperature, humidity, and power supply noise on testing.

Common DP Signal Integrity Physical Layer Test Items

DP physical layer signal integrity testing typically includes the following key test items:

• Eye Diagram Test: Evaluates waveform quality at specified test points.
• Jitter Analysis: Measures clock and data jitter.
• Voltage Swing and Pre-emphasis Test
• Skew Test: Measures synchronization performance between multiple lanes.
• SNR and BER Test: Signal-to-Noise Ratio and Bit Error Rate analysis.
• AC Common Mode Noise Test
• Return Loss and Insertion Loss (S-parameter measurements): Reflects channel transmission performance.

Commonly Used Test Instruments

The following instruments are commonly used for DP physical layer testing:

• High-Speed Oscilloscopes (e.g., Keysight Infiniium series, Tektronix DPO/MSO series)
• Bit Error Rate Testers (BERT): Used for BER analysis, such as Anritsu MP1900A, Keysight M8040A.
• Vector Network Analyzers (VNA): Used for measuring S-parameters.
• Protocol Analyzers: Used when protocol compliance verification is required.

Test Report