Tektronix WFM5200 User Manual page 60

Display Information
44
Split Diamond: provides a reliable method of detecting invalid colors
Quad Diamond (Option S3D): provides disparity histogram of the left and
right channels of a 3D signal. The black of the signal is at the bottom of the
diamond, with white at the top of the diamond. The left eye differences are on
the left side of the display and the right eye differences are on the right side
of the display. A diamond is provided for each of the Luma, Red, Green and
Blue signals to allow clear identification of the component in error.
WFM5200 Waveform Monitor User Manual