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HDO9000 High Definition Oscilloscopes Operator's Manual
Pass/Fail Testing
Pass/Fail testing allows you to define a set of qualifying conditions that an acquisition may "pass" or
"fail" when tested against, then take actions depending on whether the result is a pass or a fail.
Mask testing
compares sampled values to a pre-defined area of the grid (the "mask") to see if
l
they fall within or without.
Parameter comparison
l
compare) or to another measurement (Dual param compare).
You can preconfigure to eight qualifiers (Qx) using either method, which are then enabled by selecting
them on the Pass/Fail dialog and defining what combination of results constitutes a "Pass" on the
Actions
dialog.
Mask Test Qualifiers
Testing against a mask is particularly useful for comparing newly acquired signals to a previously
acquired "golden standard" waveform.
A mask defines an area of the grid against which a source Channel, Zoom, or Math trace is compared.
Test conditions are associated with the mask, defining how the waveform is to be compared to the
masked area (e.g., some/all values fall within, some/all values fall outside), and a Pass or Fail result
is returned indicating the condition was found to be true or false.
Mask testing can be done using a pre-defined mask or a mask created from a waveform with user-
defined vertical and horizontal tolerances. Some industry standard masks used for compliance
testing are included with the oscilloscope software. The mask test can be confined to just a portion
of the trace by the use of a measure gate.
Access Mask Test Dialogs
1. Choose Analysis > Pass/Fail to display the Pass/Fail dialog.
2. Touch the Qx button where you want to set up the qualifier.
3. Select Mask test.
The Qx dialog opens with the Mask test condition selected and the Test, Load Mask, Make Mask, and
Gate subdialogs displayed. On these dialogs, you manage, make, and apply gates to your mask.
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compares a measurement result to a pre-defined value (Param
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