Extron electronic IN1404XT - Manual (Page 48)

Operation, cont’d
IN1404XT Video Scaler and Switcher • Operation 3-28
Press the and buttons to increase and decrease the number of active pixels.
Press the and buttons to increase and decrease the number of lines. Press the
Enter
button to save the changes and return to normal system operations.
Total pixels adjustment
There are several methods to determine the correct value to use in the total pixels
variable. Usually, the best method is to use the input signal specifications. For
some input sampling rates, the scaler’s setting can result in fine vertical lines
(figure 3-17).
Total Pixels
Active
Area
Blanking Area
Figure 3-17 — Incorrect total pixels variable
As an approximate setting, multiply the active pixels setting (see Active area
adjustment) by a factor of 1.3.
If the input pixel clock rate is known, the input total pixels setting can be calculated
with this equation: Total pixels = input pixels clock ÷ input horizontal scan rate.
(The input horizontal scan rate is one of the parameters reported on the Advanced
menu>System Info screen.)
Once a preliminary setting is saved, some faint vertical lines may remain. Adjust
the total pixels variable as necessary until the lines are completely out of view or as
far apart as you can make them. If one line remains, it can be moved out of view
using the Input menu>Phase Adjustment screen.
The active pixels and total pixels adjustments are interactive. Setting one of
these variables may require adjusting the other.
Scan Type screen
The Scan Type screen is available for RGBHV, RGBS, RGsB, and progressive
component video inputs only.
The Scan Type screen identifies the currently selected scan types and provides the
ability to select a different type. Three scan type options are available; one, two, or
all three can be turned on simultaneously: