User`s guide

Mask Test 11
InfiniiVision Oscilloscopes User’s Guide 345
To manually modify a mask file
You can manually modify a mask file that you created using the Automask function.
1 Follow the steps 1-7 in “To create a mask from a “golden” waveform
(Automask)” on page 338. Do not clear the mask after creating it.
2 Attach a USB mass storage device to the oscilloscope.
3 Press the [Save/Recall] key.
4 Press the Save softkey.
5 Press the Format softkey and select Mask.
6 Press the second softkey and select a destination folder on your USB mass storage
device.
7 Press the Press to Save softkey. This creates an ASCII text file that describes the
mask.
8 Remove the USB mass storage device and connect it to a PC.
9 Open the .msk file your created using a text editor (such as Wordpad).
10 Edit, save, and close the file.
The mask file contains the following sections:
• Mask File Identifier.
• Mask Title.
• Mask Violation Regions.
• Oscilloscope Setup Information.
Mask File Identifier
The Mask File Identifier is MASK_FILE_548XX.
Mask Title
The Mask Title is a string of ASCII characters.
Example: autoMask CH1 OCT 03 09:40:26 2008
When a mask file contains the keyword “autoMask” in the title, the edge of the mask is
passing by definition. Otherwise, the edge of the mask is defined as a failure.