Telestream PRISM MPI, User Manual

Page: 272 / 304

Application Information
Diamond Application
PRISM MPI-MPX User Manual
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Convert to Rec. 709
Turn this setting
On
to allow the trace displays to convert the Gamma and Color Gamut
settings for the signal to SDR Narrow and BT. 709 (requires Option MP2-PROD).
Note: Convert to Rec. 709 auto converts to BT.709, otherwise the graticule selection
must be manually changed (see
Configure Instrument for HDR/WCG Monitoring
).
Convert to Rec. 709 mode is not supported for SD signals.
Line Select
Line Select allows you to choose the picture lines to monitor in the display. Either All
Lines or 1 Line can be selected.
If 1 Line is selected then the display only shows results for the selected line in the
picture. The line can be selected using the on-screen tools; see
Line Select Function
. Or
the line can be selected directly on the Picture.
Checking Gamut
The diamond display effectively shows how the R, G, and B signals relate. The Diamond
display is a good tool for detecting gamut errors.
To form the diamond display, the instrument converts the Y, Pb, and Pr components
recovered from the serial signal to R, G, and B. To predictably display all three
components, they must lie between peak white, 700 mV, and black, 0 V.
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.