Basic Measurements
1760 SeriesComponent Waveform/Vector Monitor User Manu al
4-20
NOTE
A valid GBR signal is guaranteed if the signal is
within the Diamondgraticule. However,this does
not guarantee that the signal will be within ap-
propriate composite limits if encoded into compos-
ite NTSC.
Signals outside the diamonds are subject to repro-
ductive errors in any format.
The graticule is labeled withG, B, and R to determine the
color problem in a GBR sense. A bright excursion outside
the graticule indicates an inval id signal, subject to clipping or
inconsistent reproductions. An already clipped or limited
signal is indicated by a bright line along or pa rallel to the
Diamond graticule.
All colored areas (the bigger the area, the brighter the dot)
are represented by data in both top and bottom di amonds. A
perfectly monochrome signal would produce a vertical line
with luminance proportional to the verti cal deflection in-
creasing upwards in the top diamond and downwards in the
bottom diamond. Increasing color saturation is indicated by
increasing horizontal deflection around t he appropriate lumi-
nance value (vertical deflection) in the top, bot tom, or both
diamonds.
In computer graphicsand film-to-tape applications, the Dia-
mond displaycan be used to check for gamut limit errors
anywhere the signal might be adjusted to create improper
GBR signals. The Diamond display monitors the actual elec-
trical signal, indicatingfaults in the transcoding hardware as
well as operator artisticviolations.