Extron Electronics VN-Matrix 250 User Guide - Manual (Page 58)

Video setup tab
To access the Video Setup tab from the Bandwidth tab, click on the Configure tab and,
when that opens, click on the Video Setup tab. The Bandwidth tab disappears and the
Video Setup tab is highlighted.
Figure 36. Video Setup Tab
This tab provides access to advanced functions that will not be needed in a typical setup.
It reports detailed measurements made of the current source video waveform, allows user
source formats to be defined (see
Constructing a Custom User Source Format on
page 80) and manual setup of phase and blanking for analog sources.
Click
Resync to restart the autodetection process.
phase should normally be set to auto . However, if a waveform suitable for autodetection
is not available, a manual phase adjustment can be imposed. Automatic phase adjustment
maximizes the contrast between pixels so good automatic waveforms tend to have adjacent
black and white pixels. Phase adjustment is only required on analog sources.
Macrovision defeat is used when the source is a dvd player and the output has been
content protected with the macrovision system. This adds additional sync level pulses to the
waveform. These pulses need to be ignored for proper auto‑detection. The pass‑through
output from matrix and the decoded output from the display do not preserve the
macrovision content protection.
Colour space is used to select between RGB and YPbPr source types. Auto‑detection
will usually succeed even with the wrong transform selected, however the coloring will be
incorrect. Currently the YPbPr mode expects the data to be as defined by CCIR.601. This is
the normal standard for all standard definition TV signals. If ITU‑R BT.709 HDTV signals are
used a red/green hue should be expected.
Blanking should normally be set to auto. However, if it is important that pixels on the very
edge of the display are visible, then a manual overide is required. Once in manual mode the
user should enter small positive or negative integers in the
pixels and lines boxes and
click update . The offsets are made relative to the current User Source Format firstpixel
and firstline values. Blanking adjustment is only required on analog sources.
VNM 250 • VNM 250 GUI Overview 52