Extron electronics VN-Matrix 250 Series User Manual page 90

6. Select a source type similar to the desired source type in the
panel (see figure 68,
Source Format
and displayed in the
currentMode
from the drop-down list. This acts as a baseline for the custom source format.
Figure 68. User Source Format Panel
7. Click ( ). Enter a name for
2
New Source
the new source in the popup box that
opens and click (see the figure to
OK
the right). Suggested naming scheme is
HresxVres_Frequency_Timing; for example,
.
1360x768_60Hz_CVT
8. Select mode or leave the box blank for progressive (
Interlace
9. Some source types do not show content over their full active areas or have content
which shows poorly defined edges and contrast. These types of sources should have
( ) checked. These source types are matched solely on sync timings
4
Fixed Geometry
not on active video timings. The Fixed Geometry option cannot be edited by the user at
this time.
10. If configuring a HD video mode that uses TriSync, set the
100. Otherwise, leave it at 0.
HDTV sources with embedded synchronization data use a modified synchronization
system called trisync. The synchronization pulse makes excursions into the active
video area, causing the active area measurements to fail unless the pulses are ignored.
Setting
Trisync Ignore
data until 2*100 pixels after the start of the horizontal sync pulse. 100 is a suitable
setting for 1080i. This should always be set to zero unless it is known trisync is being
used.
11. Copy the
monLineCount
field (
Format LineCount
12. Copy
monLinePeriod
field ( ).
7
LinePeriod
13. Enter the pixels per line in the
VESA timing chart, or calculate the value by using the following formula:
(Horizontal location of first pixel -1 + pixels per line of detected source) * (1+[desired
mode hsize - digHSize]/digHSize).
For example, if the new mode you are creating has a resolution of 1360x768, but
1280x768 is the detected mode and digFirstPixel is 401, the formula would be:
(401-1+1280) * (1+[1360-1280]/1280) =
1680 * (1 + 0.0625) =
1680 * (1.0625) = 1785
1 ). If an existing (incorrect) mode was detected
field of the
Device Status
2 2
1 1
6 6
7 7
8 8
9 9
¢ ¢
to 100 causes the active video detection logic to ignore any
value from the
Device Status
).
6
from the panel to the
Device Status
field (
Pixels Per Line
VNM 250 • Configuration with the VNM 250 GUI
field of the
Name User
panel, select that mode
£ £
3 3
4 4
5 5
).
3
field ( 5
Trisync Ignore
panel to the
User Source
User Source Format
). If this is unknown, consult a
8
) to
82