Apple Color 1.0 - Manual (Page 332)

332 Appendix A Calibrating Your Monitor
Note: The step in the second bullet also applies to the monitoring of composite signals,
but you really, really shouldn't be monitoring a composite signal if you're doing color
correction.
Once your monitor is correctly calibrated, all the gray bars will be evenly gray and all
the black bars evenly black.
Y´C
B
C
R
Rendering and Color Bars
Y´C
B
C
R
rendering must be supported by the codec used in a sequence in order for
Final Cut Pro to render color bars with a PLUGE (Picture Lineup Generation
Equipment) area that includes a super-black (4 IRE in NTSC, 2 IRE in PAL) signal for
calibration. The PLUGE part of the test signal cannot be rendered using an RGB-based
codec.
When the phase (similar to hue) of
the monitor is correctly adjusted,
you should see alternating bars of
gray and black, as shown.