Teledyne LeCroy WaveRunner XI SERIES Operator’s Manual - Manual (Page 8)

W
AVE
R
UNNER
X
I
S
ERIES
viii
WRXi-OM-E Rev D
Introduction to Math Traces and Functions .......................................................................................................... 126
Math Made Easy .................................................................................................................................................... 126
Math Function Setup ........................................................................................................................................................ 126
Resampling To Deskew .......................................................................................................................................... 127
Resampling ....................................................................................................................................................................... 127
Rescaling and Assigning Units ................................................................................................................................ 127
Rescaling Setup ................................................................................................................................................................ 129
Averaging Waveforms ............................................................................................................................................ 129
Summed vs. Continuous Averaging .................................................................................................................................. 129
Continuous Averaging Setup ............................................................................................................................................ 131
Summed Averaging Setup ................................................................................................................................................ 131
Enhanced Resolution ............................................................................................................................................. 131
How the Instrument Enhances Resolution ....................................................................................................................... 131
Enhanced Resolution (ERES) Setup ........................................................................................................................ 134
Waveform Copy ..................................................................................................................................................... 134
Waveform Sparser ................................................................................................................................................. 134
Waveform Sparser Setup ................................................................................................................................................. 135
Interpolation .......................................................................................................................................................... 135
Interpolation Setup .......................................................................................................................................................... 135
FFT .................................................................................................................................................. 135
Why Use FFT? ......................................................................................................................................................... 135
Power (Density) Spectrum ..................................................................................................................................... 136
Memory for FFT ................................................................................................................................................................ 136
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 ............................................................................................................................................................. 141
A NALYSIS ........................................................................................................................................... 142
Pass/Fail Testing ..................................................................................................................................................... 142
Comparing Parameters .................................................................................................................................................... 142
Mask Tests ....................................................................................................................................................................... 143
Actions ............................................................................................................................................................................. 143
Setting Up Pass/Fail Testing ................................................................................................................................... 144
Initial Setup ...................................................................................................................................................................... 144
Comparing a Single Parameter ........................................................................................................................................ 144
Comparing Dual Parameters ............................................................................................................................................ 145
Mask Testing .................................................................................................................................................................... 146
W AVE S CAN ........................................................................................................................................ 147
Introduction to WaveScan ..................................................................................................................................... 147
Signal Views ..................................................................................................................................................................... 147
Search Modes ................................................................................................................................................................... 148
Parameter Measurements ............................................................................................................................................... 148
Sampling Mode ................................................................................................................................................................ 148
Source View ........................................................................................................................................................... 148
Level Markers ................................................................................................................................................................... 148