Signal trend analysis and deviation detection
Have you ever wanted to analyze a large amount of waveform measurement data and could not find a way to do it? Do you know where to start to understand the trend of signal changes? Do you want to know whether there is a large deviation content mixed in many tested signals? The above test requirements cannot be achieved by the general oscilloscope functions.
New-generation oscilloscopes provide the segmented memory function. The so-called segmented memory function is to allow the oscilloscope memory to capture only the waveforms that users want to observe and ignore irrelevant signals so as to optimize the use of memory depth. The segmented memory function can capture waveforms at high speed and then analyze them. First, waveforms are captured and then Auto Measure is applied to calculate the segmented memory page by page. The spacing of the sampled waveforms can reach μs the fastest.
The segmented memory function of the GW Instek oscilloscopes also provides the statistics function to allow users to understand whether the signals captured in the segmented memory are distributed as expected or whether they are mixed with excessive deviation signals. Two application cases are elaborated as follows:
When measuring the signal on an IC Pin, if the signal sends out a different number of Pulse groups within a fixed time interval, it is expected that the Pulse Count sent each time will be Gaussian distribution or equal-difference distribution, and users can utilize the statistics function of the segmented memory function to find out whether the distribution is generally in line with the expectations. This is not achieved by using the general measurement function or the playback function of segmented memory to observe the measured values page by page. Take the following display as an example, the data shows equal-difference distribution. The distribution curve of the signal can be easily observed by the statistics function of the segmented memory.
Equal-difference distribution display
Users can use the statistics function of segmented memory to analyze whether the captured segmented waveforms are mixed with a large deviation. For example, in 1,000 pages of segmented waveforms, the width of most waveforms is 100us. The statistics function can be used to allow users to know whether there is a pulse with a large deviation without checking it page by page. Take the following display as an example, 801 out of 1000 waveforms are concentrated in Bin5, and the range between the minimum value and the maximum value is from 99.77us ~ 100.2us. Users can use this result to determine whether the statistics result exceeds the allowable range.
Pulse width statistics display
GW Instek GDS-2000E / MSO-2000E / MDO-2000E and MDO-2000A oscilloscopes are equipped with segmented memory and the statistics function as standard. Users can use these series of oscilloscopes to analyze the distribution trend and to find out if there is any deviation signal that exceeds the expected. If you are bothered by analyzing a large amount of measurement waveforms, please choose an oscilloscope with segmented memory and the statistics function.
Please contact us for further information of GDS-2000E/MSO-2000E/MDO-2000E and MDO-2000A series.
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