泰克说明书01.pdf

Application Note
Wave Inspector® Navigation and
Search: Simplifying Waveform Analysis
Introduction
As Moore’s Law pushes electronic technology faster, system designs continue to become
more complex, and subsequently harder to design, build, troubleshoot, and fix when they
break. So what does this mean to modern oscilloscopes?
Wave Inspector® Navigation and Search: Simplifying Waveform Analysis
Application Note
As designs become faster and more complex, the need for continue to drive the need for longer and more detailed data
long records, more bandwidth and higher sampling rate, will capture windows.
also increase. Record length is the number of samples an
oscilloscope can digitize and store in a single acquisition. Analyzing all that Data
The longer the record length, the longer the time window The first digital oscilloscopes had very short record length.
the oscilloscope can capture with high timing resolution As such, it was easy to see everything the oscilloscope
(high sample rate). The record length required for a specific captured because it was all on the screen at one time. As
application is directly affected by the bandwidth and sample oscilloscopes evolved and records got longer, horizontal
rate. As bandwidth goes up, the sampling rate must scrolling was used to see all the data. This was not a big
be approximately five times higher to accurately capture issue as you move from one screen’s worth of information
the signal’s high frequency content. As the sampling rate to two, then up to four, eight, twenty, etc. However, as
goes up, a given time window of signal acquisition requires records became longer and longer with each generation
more samples. of oscilloscope, the time required to look through all the
For example, to capture 2 milliseconds of a 100 MHz data captured in a single acquisition grew longer and longer.
signal at 5 GS/s requires a 10 mill