Checking Gamut
Usage Notes
To automate this check, do the procedure
Automating Gamut Checks
. (See
Checking Luma Gamut
Luma limit thresholds can be con
fi
gured for identifying luma exceeding threshold
limits. They apply to both the incoming SDI and to the Arrowhead representation
of the SDI input as a composite signal. By de
fi
ning these levels in percent, they
automatically account for the presence or absence of setup. The thresholds are
affected by your choice of set-up or no set-up for the Arrowhead display.
Set the thresholds for gamut. (See page 97,
.) After
selecting the
Arrowhead
display, compare the signal to the display to determine
out-of-gamut luminance. Note the following:
The adjustable thresholds are indicated by the dark blue horizontal graticule
lines.
The thresholds are de
fi
ned in terms of percent of full scale.
The range for the Upper limit is 90% to 108%.
The range to the Lower Limit is –6% to +5%.
Another useful Arrowhead function is a measure of how well the active video
signal is using the dynamic range of the video channel. A properly adjusted signal
should be centered in the arrowhead graticule and have transitions that approach
all the limits.
Automating Gamut Checks
You can use alarms to automatically monitor for out-of-gamut conditions.
1.
Check that Gamut thresholds are con
fi
gured as you want them. (See page 97,
2.
Press the
CONFIG
button to display the Con
fi
guration menu.
3.
Select
Alarms
and then
Video Content
. A dialog box appears where you can
select for the various Video Content alarms.
4.
Use the up/down arrow keys to move to each of the alarms that you want to
set. Press the
SEL
button to toggle the alarm on (X) or off.
5.
When you have con
fi
gured the Alarms as you want them, move to the
Select
here
box and select it.
6.
Back in the Alarms menu, check that
Enable Alarms
is set to
On
before
exiting the Alarms menu.
102
WVR5200 Waveform Rasterizer User Manual
Summary of Contents for WVR5200 Series
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