Using Custom Bitmaps; Workflow For Importing Bitmaps; Workflow For Loading Bitmaps From The Sd Card - Teledyne Lecroy 780 User Manual

780/780AH Handheld Test Instrument – User Guide

10.3 Using Custom Bitmaps

You can import your own bitmaps into the 780/780AH through the USB interface or load them from an SD card.
Note that when bitmaps are imported into the 780/780AH, 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 780/780AH can accommodate up to 40 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.

10.3.1 Workflow for Importing Bitmaps

In order to import and use bitmaps in the 780/780AH you must take the following high level steps (detailed
procedures are provided further below):
Place the 780/780AH'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 780/780AH over the USB interface.

Transfer the bitmap(s) over to the 780/780AH flash memory through the USB interface.


10.3.2 Workflow for loading bitmaps from the SD card

In order to load bitmaps from the 780/780AH'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 780/780AH to an SC card using a card reader.

Insert the SD card into the 780/780AH 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.
November 17, 2016
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