GRASS VALLEY KARRERA K-FRAME, Installation & Service Manual

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KARRERA K-FRAME — Installation & Service Manual 189
Node Settings
blanking regeneration can be disabled. This following settings apply to the
output blanking of all the MEs.
Pass Bus A’s Ancillary Data
– Passes the ancillary data from the A bus to the ME
Program output during the vertical interval.
Regenerate Blanking
– Regenerates blanking during the vertical and hori-
zontal intervals.
Default iDPM Crop
Default crops are intended to define the extent of a standard image for a
facility. The Default iDPM Crop controls adjust cropping when individual
iDPM channel crop is turned off. Individual iDPM cropping is used to
adjust for variations in individual sources.
SMPTE RP-187 establishes recommended practices for standard image
sizes (production aperture, clean aperture). If a facility conforms to these
practices, the Karrera K-Frame system default values will be correct and no
adjustment should be necessary. Changing the default crops is not recom-
mended, unless absolutely necessary.
Unfortunately, not all video images have the transition to blanking (black)
in exactly the same place. Normally, these blanking variations are hidden
at the extreme edges of the picture and are not visible. If an image smaller
than expected is transformed, however, black lines can occur at its edges,
which are now visible because they have moved inside the visible picture
area. If it is necessary to compensate for variations in your facility's nominal
blanking, adjust the default crops so they just remove black edges on the
facility’s normal image.
The 4:3 and 16:9 aspect ratios have different default crops.
Crop Edge
– Allows setting alternative cropping for iDPM processing.
Unity – Resets iDPM cropping to factory default.
Timing Analyzer
The Video Settings menu also has a timing analyzer and system timing
adjustments. See
Timing Analyzer on page 83 for more information.
Node Settings
The Node Settings menus are used to establish communications among
various Karrera K-Frame system components. These important settings are
not included in Eng Setup configuration files, to prevent accidental system
communication failures if Eng Setup files are loaded incorrectly.