Poor interpolation can cause an
oscilloscope to make waveforms that are not accurate or consistent. Interpolation adds extra points between existing points to provide better resolution and accuracy. When this process isn't done correctly, it can lead to incorrect measurements or distorted waveforms.
1. Understanding Interpolation:
It is essential to understand the concept of interpolation to successfully fix oscilloscope waveform shape caused by poor interpolation. Interpolation is adding extra points between existing points to provide more accurate resolution and measurement of signal behavior.
2. Identifying Poor Interpolation:
The first step in resolving oscilloscope waveform shape caused by poor interpolation is to identify the source of this problem. Visual inspection can determine if there are distortions within the waveform or if it appears jagged or uneven. Also, measurements like amplitude, frequency, and rise time can be taken at certain points on the waveform to see if bad interpolation is to blame.
3. Adjusting Interpolation Settings:
Once bad interpolation has been found to be the cause of the shape of the waveform, the next step is to change the interpolation settings on the oscilloscope. To get an accurate and consistent shape from different types of waveforms, you may need to use different interpolation settings. For example, a sine wave will require slightly different settings than a square wave or triangle wave. Experiment with various combinations of Interpolation type (Linear/Cubic) and Interpolator Length until an optimal waveform is achieved.
4. Troubleshooting Other Causes:
If changing the oscilloscope's interpolation settings doesn't make the waveform look better, it's important to think about what else could be wrong. Issues such as improper grounding, incorrect probe connection, or an interference source may be causing the distortion and should be thoroughly investigated and addressed.
5. Verifying Measurements:
Once the oscilloscope waveform has the shape you want, it's important to take accurate measurements to ensure it's right. At certain points on the waveform, you can check the amplitude, frequency, and rise time to ensure they are in acceptable ranges. If any of these numbers don't seem right, you may need to do more troubleshooting to fix the problem.
If you understand interpolation and follow these steps to fix bad oscilloscope waveform shape caused by bad interpolation, you can make accurate and consistent waveforms. This will give the most accurate readings and ensure the oscilloscope is used safely and well.
LINK REMOVED