Figure 46: Diamond Display Plot - Tektronix WFM5200 User Manual

WFM5200 Waveform Monitor User Manual
For a signal to be in gamut, all signal vectors must lie within the G-B and G-R
diamonds. Conversely, if a signal vector extends outside the diamond, it is out
of gamut. The direction of an excursion out of gamut indicates which signal is
excessive. Errors in green amplitude affect both diamonds equally, while blue
amplitude errors affect only the top diamond and red errors affect only the bottom
diamond. (See Figure 46.)

Figure 46: Diamond display plot

Set the thresholds for gamut. (See page 101, To Set Up Gamut Checks.) After
selecting the Diamond display, compare the signal to the display to determine
out-of-gamut components. Note the following:
The intensity of a vector indicates its duration.
A momentary out-of-gamut condition appears as a faint trace. Long duration
violations show as a bright trace.
When evaluating out-of-gamut components, consider the following examples.
(See Figure 47.)
Example A:
R - Ok
G > 700 mV
B - Ok
Example B:
R - Ok
G - Ok
Checking Gamut
103