Nevion PGM-HD-2x1-PB - Manual (Page 18)

PGM-HD-2x1-PB Rev. B
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5.5 Fallback to video generator
The video generator can produce several simple signals: Colorbar, Colorbar with a
moving box, Check field, and Flat field.
The Flat field can be set up to produce any 10bit (0-1023) luma and chroma value, or
to produce a predefined color.
For this module the video generator can only be used as a fallback, i.e. when the
selected video input disappears. When the input goes missing the picture will freeze,
and if the input reappears during this time, the freeze condition will be lifted without the
generator being used. If the signal hasn’t returned within approximately 1000
milliseconds, the generator will be switched in. Once the generator has been switched
in, the input will have to be present and stable for approximately 1000 ms before the
module will switch back from the generator.
Figure 11: Gyda view of the video generator
5.6 On-screen label generator
The label generator consists of 2 lines, 16 characters each. Two different sizes can be
selected, in addition to black text with white border or white text with black border.
The intended main function of this generator is to enable the user to automatically
superimpose a text label to the internal generator at loss of input signal. This is done by
selecting the
“Auto” tick-box on the “Label generator” block in the Multicon GYDA
configuration page. In a long chain of cards, this can be a very way to identify where
the signal was actually broken and replaced with a generated output.
It is also possible to always superimpose the label on the incoming SDI by ticking the
“On” box.
Note that to see the label on an output the video output selection must be
set to “processed” for this specific output.
Figure 12: Gyda view of the label generator
5.7 Video monitor
The incoming video is analyzed and the number of frames with errors are counted.
Individual errors (or types of error) can also be ignored. The errors available for
selection in this module are: