Extron Electronics IN1408 - Manual (Page 37)

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IN1408 Operation Manual - V1.4 3/21/02 12:32 PM © 2002 - INLINE, Inc.
Total Pixels Adjustment
In Figure 4, the total pixels are adjusted incorrectly. There are several ways to set the total pixels. It is
best to set the total pixels according to the input signal specifications. Otherwise, if the input pixel clock
is known, the input total pixels may be calculated from the formula shown below. The input horizontal
scan rate, as measured by the IN1408, can be found in the Advanced Menu Section under System Info
(see page 23).
Multiplying the input active pixels by 1.3 may approximate the input total pixels. Also, the input total
pixels may be adjusted to minimize any faint vertical lines that may be seen within the image, as
shown below in Figure 4.
The total pixels may be adjusted to move the lines closer together or further apart. Adjust the total
pixels until the lines are furthest apart or until they are completely out of view. If one line still
remains, it may be moved out of view using the phase adjustment. The input active pixels and total
pixels are interactive. Setting one may require readjustment of the other.
1. Set input total pixels according to input signal specifications.
2. Input total pixels = input pixel clock / input horizontal scan rate.
3. Input total pixels
≈
1.3 x input active pixels.
4. Set input total pixels to minimize faint vertical lines (see Figure 4).
5. After the input active pixels have been set correctly, adjust total pixels for the
correct active width.
Blanking Area
Active
Area
Total Pixels
Figure 4. Incorrect Total Pixels