802BT/802R Video Test Generator User Guide 75Creating custom imagesThis section describes how to create images and add them to the generator’s imagelibrary, and how to customize the image list. The recommended method for creatingimages is create a text file containing the commands for creating the image, and thendownloading the text file to the generator. Another method for creating images is to usethe Image Editor in VGM to create a basic image, save the basic image as a command filein VGM, and then open and edit the command file to refine the image as needed.To create custom images with a command file:1. Using a text editor, open a text file (command file) on your computer and enter thefollowing commands.OUTG 0 // gates all video and sync outputs offIMGN new_image // creates a new imageIMGB // begin an image editing sessionXRES 640 // sets the horizontal resolutionYRES 480 // sets the vertical resolution.. // other image parameters.IMGE // ends an image editing sessionIMGA new_image // saves image as new_imageOUTG 1 // gates all video and sync outputs onIMGU // draws the imageALLU // applies the buffer to the generator hardware2. Save the text file, using a *.txt extension.3. Establish a terminal session with the generator. See “Setting up a terminal connectionwith the generator” on page 14.4. At the R:> prompt, transfer the text file to the generator. For example, to transfer a fileusing HyperTerminal, do the following:a. On the Transfer menu, click Send Text File. The Send Text File dialog boxappears.b. Select the text file you want to send, and then click Open. HyperTerminal displaysthe commands as they are sent.c. Press Enter once to ensure that the last command is sent.5. Assign the image to Image knob list by entering the following commands:DIRL IMG // loads image directory into edit bufferDIRB // begins a directory editing sessionNAMI 20 new_image // assigns image to image knob list at 20DIRE // ends a directory editing sessionDIRS // saves contents of directory as current name
