Agilent Technologies 4000 X-Series User Manual page 273

15
Mask Testing
9 To clear the mask and switch off mask testing, press the Back/Up
key to return to the Mask Test Menu, then press the Clear Mask softkey.
If infinite persistence display mode (see "To set or clear persistence" on
page 151) 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 If you press Create Mask and the mask appears to cover the entire screen,
Mask Setup
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.
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 273