Understanding why these larger waves appear requires looking at the interaction between the input signal, the oscilloscope’s vertical sensitivity, and the time base configuration. When the sensitivity is increased to capture tiny signals, the trace utilizes the full height of the screen to represent that minute voltage.
Why Distortion Creates the Illusion of Larger Waves on Scope
If the math is not configured correctly in the oscilloscope’s settings, the displayed voltage can appear much larger than the actual signal, resulting in a wave that seems excessively tall. This magnification is essential for analyzing small details but can make the wave look enormous.
A slow time base setting spreads one second of data across the display, causing the waveform to stretch out and appear very wide. Horizontal Scaling and Time Base While vertical scaling affects height, horizontal scaling affects the width and density of the wave.
How Distortion Can Make Your Signal Mimic a Larger Wave on the Oscilloscope
Optimizing the Display To manage the appearance of large waves, users must balance the controls. When a signal has high-frequency components or impedance mismatches, it can create reflections that manifest as large, spiky waves on the display.
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