DP AUX

DP AUX (DisplayPort Auxiliary channel)

The DP AUX Channel is to detect the link, configuration, and status of the Display Port source. The Display Port is the digital display interface that is specified in the VESA standard.

Acute Technology provides logic analyzers with DP AUX decoding capabilities, including detailed DPCD bit analysis, significantly reducing debugging time.

The TravelBus series supports direct measurement of differential signals, such as DP AUX, while other series require a DP AUX adaptor to convert differential signals into single-ended signals.

Logic Analyzer / MSO

TB3016B MSO2116E (w/ analog channels)
TB3000 series Specifications PDF MSO2000 series Specifications PDF
Model TB3016F MSO2116E
Decode y y
Analog y

DP AUX Decode / Waveforms (Digital + Analog):


Multiple Protocols (I2C + DP AUX) Decode / Waveforms


Save as TXT/CSV

In Logic Analyzer mode, click the icon above the report area to save the decoded data as a TXT/CSV file.

DP AUX Decoding Setup Steps

1. Click Quick Settings or Add Protocol Decode to select a protocol for logic analyzer capture.

2. Select DP_AuxCH for decoding.

3. If you use Quick Settings, the system will recommend configurations for trigger type, sampling rate, voltage threshold, and channel settings.

4. Click the icon to access the Decode Settings screen

 

Decode Settings

Channel: Set the channel to decode

Show DPCD: Show the Display Port Configuration data.

Mode: Choose the mode DP_Aux/HPD/PWR

Startup transaction: Set the transaction type of the first frame

Reply Timeout: Set the value of timeout

 

Protocol Analyzer DP AUX Decode



Save as TXT/CSV

In Protocol Analyzer mode, click the icon above the report area to save the decoded data as a TXT/CSV file.

TravelBus Series Logic Analyzer

Use a USB Type-C adaptor to extract the DP AUX differential signals, then measure them directly with the TB3016B.

TB3016B pins

USB Type-C fixture



MSO2000 Series Logic Analyzer

Use a USB Type-C adaptor to extract the DP AUX differential signals, convert them to single-ended signals using a DP AUX adaptor, and then measure them with the MSO2000 series logic analyzer.


DP AUX Differential Signal Adaptor
Cascade multiple DP AUX adapters:


YouTube Video

DP AUX Decoding Examples

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