226 Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide
16 Mask Testing
• # of Tests (total number of mask tests executed).
And for each analog channel:
• The Source channel.
• Number of failures (acquisitions in which the signal excursion went beyond the
mask).
• Failure rate (percentage of failures).
• Sigma (the ratio of process sigma to maximum achievable sigma, based on
number of waveforms tested).
You can select Reset Statistics in the Mask Test dialog box. Note that statistics are
also reset when:
• Mask Test is switched on after being switched off.
• Clear Mask is selected.
• Create Mask is selected in the Automask dialog box.
Additionally, the accumulated time counter continues whenever the oscilloscope
is run after the acquisition was stopped.
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 221. Do not clear the mask after creating it.
2 Attach a USB mass storage device to the oscilloscope.
3 From the main menu, choose File > Save....
4 In the Save dialog box, from the Format drop-down list, select Mask (*.msk).
5 Enter a File Name, and select a destination folder on your USB mass storage
device.
6 Select Save.
This creates an ASCII text file that describes the mask.
7 Remove the USB mass storage device and connect it to a PC.
8 Open the .msk file your created using a text editor (such as Notepad).
9 Edit, save, and close the file.
The mask file contains the following sections:
• Mask File Identifier.
• Mask Title.
• Mask Violation Regions.
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