Tektronix WFM 601i, Руководство пользователя

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Measurement Applications
3–16
WFM 601i Serial Component Monitor
some problem behavior is noticed in the eye pattern, and it occurs for only a
fraction of the field, use the line selector to highlight it and then observe the
corresponding bright-up on the picture monitor. Of course, the windowed
displays can also be observed with the WAVEFORM, PARADE, VECTOR, and
LIGHTNING display modes.
Using the Diamond Display
The WFM 601i features the Tektronix “Diamond” display. The primary use of
this display is to check video signals for proper RGB Gamut, and to assist in
RGB signal manipulation.
Ultimately all color video signals are coded to RGB for display on a picture
monitor. To be predictably displayed all three components must lie between peak
white, normally 700 mV, and black, normally 0 V. Excursions outside this range
will be produced differently by different picture monitors, depending on where
they clip. Proper RGB Gamut means that R, G, and B independently always
assume values between 0 V and 700 mV.
Diamond is simply a method of showing the relationship between the R, G, and
B signal values. These three independent components describe a three
dimensional space. To show this in two dimensions, G and B are displayed in
one X-Y plot, while G and R are displayed in a second plot. These two separate
plots are rotated 45 degrees and overlaid at their origins. See Figure 3-8.
RGB Gamut
Diamond Explained