When a signal has high-frequency components or impedance mismatches, it can create reflections that manifest as large, spiky waves on the display. The size of the wave, both in height and width, is determined by how the instrument scales these axes.
Understanding How Input Signal Creates Larger Oscilloscope Waves
Properly configuring the trigger ensures that the larger waves are displayed consistently and clearly for measurement. Impact of Vertical Scaling The vertical scale, measured in volts per division, is one of the primary reasons for large wave appearances.
If the trigger level is set incorrectly relative to the wave’s amplitude, the oscilloscope might struggle to maintain a stable picture, causing the wave to appear to move or morph. When the sensitivity is increased to capture tiny signals, the trace utilizes the full height of the screen to represent that minute voltage.
How Input Signal Causes Larger Oscilloscope Waves
In these scenarios, the "larger wave" is actually a distortion of the true signal. When observing a signal on an oscilloscope, the display often shows a visual representation of voltage changing over time.
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