CMN-91
Installation and Operation Manual
Operation
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 76
Key
Indicator
Description
4
Luma Upper Limit Line The luma upper limit line indicates the gamut alarm luma upper limit.
When the gamut alarm is enabled, and the luma upper limit is
exceeded, the luma upper limit line and LUMA turn red.
5
Luma Lower Limit Line The luma lower limit line indicates the gamut alarm luma lower limit.
When the gamut alarm is enabled, and the luma lower limit is
exceeded, the luma lower limit line and LUMA turn red.
RGB Gamut Display
When setting the upper and lower limits, the upper and lower gamut rings represent the threshold
values.
To move the gamut rings, set the ALARMS
VIDEO
GAMUT
RGB GAMUT UPPER (or LOWER)
THRESHOLD selection option.
The RGB Gamut Display, shown in and described in , is similar to the Composite Gamut Display. The RGB
Gamut vector displays video amplitudes (which are in mV) in a polar format to represent color
information. The rings turn red when the alarm is enabled and the values exceed the threshold setting.
Each R, G, and B pixel is plotted using amplitude and phase. The amplitude is derived from the R, G, B
component. The phase is derived from the Cb Cr information of the digital signal. The pixels can be
plotted as a single color or as each component color (see Table ). Unlike the composite Gamut vector,
which plots two points per pixel, the RGB Gamut vector plots three points. Also, signals with no color
content are displayed on a separate bar graph labeled Mono.
The RGB graticule is nearly identical to the composite graticule. The only differences are
Amplitudes are displayed in mV rather than IRE or UNITS.
The radials representing color vectors are 60° apart since they are displayed in a component color
space.
Mono bar graph is for monochrome.