240    WM-OM-E Rev I 
ANALYSIS 
Pass/Fail Testing 
Comparing Parameters 
Each Pass/Fail input (Qx) can compare a different parameter result to a user-defined limit (or 
statistical range) under a different condition.  
The conditions are represented by these comparison operators: 
 
At the touch of a button, test results can also be compared to these standard statistical limits: 
• current mean 
•  mean + 1 SD 
•  mean + 3 SD 
In Dual Parameter Compare mode, your X-Stream scope gives you the option to compare to each 
other parameter results measured on two different waveforms. You can set your test to be true if 
Any waveform or All waveforms fit the criterion stipulated by the comparison condition. Your setup 
is conveniently shown in the Summary box of the Qx dialog. For example:  
 
 
Mask Tests 
You have the choice to do mask testing by using an existing mask, or by using a mask created from 
your actual waveform, with vertical and horizontal tolerances that you define. Existing  masks can