NI 5431 Composite Video Generator
Inserting Test Signals in the Video Signal

Intermediate Insert ITS in Composite Signal shows you how to include insertion test signals in the video signal. An ITS is typically inserted in the vertical blanking period of the video signal, but this is not a restriction. In fact, you can build an entire video signal using ITS. This allows you to keep full control of and accuracy on the data you are generating. Also, some ITS cannot be generated from RGB data such as a signal with a luminance value of zero, but a saturation value other than zero.

You can access this example VI by selecting Functions»Video Generation»Generator Examples» Intermediate insert ITS in composite signal.

To insert test signals in the video signal, complete the following steps:

1. Launch the example VI.
2. Make sure the module ID value matches the value assigned by MAX during configuration of the module.
3. On the front panel, use the operator tool and the up and down arrows on the Video type control to select the appropriate video format.
4. Run the VI. The Input BMP File? dialog box appears, prompting you for the bitmap image file to convert to a binary video data file.
5. Double-click the BMPs shortcut, then double-click the appropriate subdirectory based on the video format you chose in step 3. The Input ITS file? dialog box appears.
6. Double-click the Insertion test signals shortcut to browse for the appropriate insertion test signals file based on the video format you chose in step 3.
7. Double-click a subdirectory, then double-click an .its file. By default, the VI inserts an ITS on line 19.

If the video monitor does not have options that allow you to see the vertical blanking lines (cross-pulse mode), modify the Line number from 19 to a higher value such as 50. The ITS line in the upper part of the video image appears.