How can the frequency response of an oscilloscope be improved?

To display higher frequency signals accurately, an oscilloscope requires two primary improvements to its internal electronics. First, the vertical amplifier must have a wider frequency response (higher bandwidth) so it can process fast-changing voltage signals without attenuating or distorting them. Second, the horizontal sweep rate must be increased. High-frequency signals complete their cycles very rapidly; a faster horizontal sweep spreads these rapid cycles out across the screen, allowing you to see individual waveforms rather than a solid blur of compressed lines. Options that suggest increasing the 'vertical sweep rate' or 'horizontal amplifier frequency response' are incorrect because standard oscilloscopes sweep time on the horizontal axis and measure voltage on the vertical axis.