Mask Testing 16
Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide 181
9 To clear the mask and switch off mask testing, press the Back key to return
to the Analyze menu, then press the Clear Mask softkey.
If infinite persistence display mode (see "To set or clear persistence" on page 85)
is "on" when mask test is enabled, it stays on. If infinite persistence is "off" when
mask test is enabled, it is switched on when mask test is switched on, then infinite
persistence is switched off when mask test is switched off.
Troubleshooting
Mask Setup
If you press Create Mask and the mask appears to cover the entire screen, check the
± Y and ± X settings in the Automask menu. If these are set to zero the resulting
mask will be extremely tight around the waveform.
If you press Create Mask and it appears that no mask was created, check the ± Y
and ± X settings. They may be set so large that the mask is not visible.
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