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Basic Measurements
1760 Series Component Waveform/Vector Monitor User Manual
4-20
NOTE
A valid GBR signal is guaranteed if the signal is
within the Diamond graticule. 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 with G, B, and R to determine the
color problem in a GBR sense. A bright excursion outside
the graticule indicates an invalid signal, subject to clipping or
inconsistent reproductions. An already clipped or limited
signal is indicated by a bright line along or parallel to the
Diamond graticule.
All colored areas (the bigger the area, the brighter the dot)
are represented by data in both top and bot tom diamonds. A
perfectly monochrome signal would produce a vertical line
with luminance proportional to the vertical deflection in-
creasing upwards in the top diamond and downwards in the
bottom diamond. Increasing color saturation is indicated by
increasing horizontal deflection around the appropriate lumi-
nance value (vertical deflection) in the top, bottom, or both
diamonds.
In computer graphics and film-to-tape applications, the Dia-
mond display can 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, indicating faults in the transcoding hardware as
well as operator artistic violations.