Table of Contents
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W
R
X
S
I
Introduction to Math Traces and Functions .......................................................................................................... 126
Math Made Easy .................................................................................................................................................... 126
Math Function Setup . ....................................................................................................................................................... 1 26
Resampling To Deskew .......................................................................................................................................... 127
Resampling . ...................................................................................................................................................................... 1 27
Rescaling and Assigning Units . ............................................................................................................................... 127
Rescaling Setup ................................................................................................................................................................ 1 29
Averaging Waveforms . ........................................................................................................................................... 129
Summed vs. Continuous Averaging . ................................................................................................................................. 1 29
Continuous Averaging Setup ............................................................................................................................................ 1 31
Summed Averaging Setup ................................................................................................................................................ 1 31
Enhanced Resolution ............................................................................................................................................. 131
How the Instrument Enhances Resolution ....................................................................................................................... 1 31
Enhanced Resolution (ERES) Setup ........................................................................................................................ 134
Waveform Copy ..................................................................................................................................................... 134
Waveform Sparser ................................................................................................................................................. 134
Waveform Sparser Setup ................................................................................................................................................. 1 35
Interpolation .......................................................................................................................................................... 135
Interpolation Setup .......................................................................................................................................................... 1 35
FFT . ................................................................................................................................................. 135
Why Use FFT? . ........................................................................................................................................................ 135
Power (Density) Spectrum ..................................................................................................................................... 136
Memory for FFT . ............................................................................................................................................................... 1 36
FFT Pitfalls to Avoid . ............................................................................................................................................... 136
Picket Fence and Scallop . ....................................................................................................................................... 136
Leakage .................................................................................................................................................................. 136
Choosing a Window ............................................................................................................................................... 136
Improving Dynamic Range ..................................................................................................................................... 137
Record Length ........................................................................................................................................................ 137
FFT Algorithms ....................................................................................................................................................... 138
FFT Glossary ........................................................................................................................................................... 139
FFT Setup . ............................................................................................................................................................... 141
Setting Up an FFT ............................................................................................................................................................. 1 41
. .......................................................................................................................................... 142
Pass/Fail Testing . .................................................................................................................................................... 142
Comparing Parameters .................................................................................................................................................... 1 42
Mask Tests ....................................................................................................................................................................... 1 43
Actions ............................................................................................................................................................................. 1 43
Setting Up Pass/Fail Testing . .................................................................................................................................. 144
Initial Setup ...................................................................................................................................................................... 1 44
Comparing a Single Parameter ........................................................................................................................................ 1 44
Comparing Dual Parameters . ........................................................................................................................................... 1 45
Mask Testing .................................................................................................................................................................... 1 46
. ....................................................................................................................................... 147
Introduction to WaveScan ..................................................................................................................................... 147
Signal Views ..................................................................................................................................................................... 1 47
Search Modes . .................................................................................................................................................................. 1 48
Parameter Measurements ............................................................................................................................................... 1 48
Sampling Mode ................................................................................................................................................................ 1 48
Source View ........................................................................................................................................................... 148
Level Markers . .................................................................................................................................................................. 1 48
viii
WRXi-OM-E Rev D
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