Quantum Data 881 - Manual (Page 483)

881/882 Video Test Generator User Guide (Rev A.22) 465
Link Layer sink testing operations
You can test the aux channel link layer functionality of a DisplayPort sink device by
overridding the link training function. This enables you to control the link parameters that
are normally determined during link training. The following procedures can be used to
manually test the link layer.
To test the Link Layer manually:
1. Turn off the link layer output with the following command:
DPTX:DTOP 0 // Disables the DisplayPort link layer output
2. Set the number of lanes using the following command:
DPTX:SLAC 1 // Sets the lane count to 2 lanes.
3. Set the link rate using the following command: