Quantum Data 780B, Руководство пользователя

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780B Video Generator/Analyzer
– User Guide
Page 183
December 1, 2014 Revision A7
11.3 Using Custom Bitmaps
You can import your own bitmaps into the 780B through the USB interface or load them from an SD card. Note
that when bitmaps are imported into the 780B, they are
rendered at their native resolution, i.e. they do not
scale to the resolution of the video format you have selected as the standard test patterns do. Therefore, if you
want to test with a specific bitmap pattern for each resolution and you want the bitmap to fill the entire display,
you would need to import a separate bitmap of that image for each resolution you wish to test.
The 780B can accommodate up to 50 custom bitmap images in its internal memory and additional bitmaps
stored on the SD card.
Important Note: It is highly recommended that you not select bitmap images when outputting compressed
audio clips.
11.3.1 Workflow for Importing Bitmaps
In order to import and use bitmaps in the 780B you must take the following high level steps (detailed
procedures are provided further below):

Place the 780B
’s USB interface in the
Disk mode. This is not the default mode for the USB interface.
 Create a text file called “UserPats.txt” that lists each bitmap stored for use. The name in the file has to
match the name of the bitmap. The procedures below provide an example of this text file.

Transfer the UserPats.txt file to the 780B over the USB interface.

Transfer the bitmap(s) over to the 780B flash memory through the USB interface.
11.3.2 Workflow for loading bitmaps from the SD card
In order to load bitmaps from the 780B
’s SD card you must take the following high level steps (detailed
procedures are provided further below):
 Create a text file called “UserPats.txt” that lists each bitmap stored for use. The name in the file has to
match the name of the bitmap. The procedures below provide an example of this text file.

Transfer the UserPats.txt file to the 780B to an SC card using a card reader.

Insert the SD card into the 780B SD slot on the front.
Important notes about SD card use and formatting :
1. The SD card (not an SDHC and not an SDXC).
2. The SD card should be a 1GB or less.
3. The SD card should be formatted using an SD format program available from www.sdcard.org .
4. The SD card must be formatted FAT16.
11.3.3 Procedures for Importing Bitmaps