Agilent Technologies 22A, 54621D, 24A, 42A, 54621A, 41A manual Making Measurements

Making Measurements

To capture glitches or narrow pulses with peak detect and infinite persistence

To capture glitches or narrow pulses with peak detect and infinite persistence

A glitch is a rapid change in the waveform that is usually narrow as compared to the waveform. To capture glitches or narrow pulses:

1 Connect a signal to the oscilloscope and obtain a stable display.

2To find the glitch, press the Acquire key, then, press the Peak Det softkey.

54620-seriesPeak detect acquire mode displays any signal pulse wider than 5 ns, allowing you to find glitches and narrow spikes regardless of sweep speed. Because of MegaZoom memory, peak detect is only necessary at sweep speeds of 1 ms/div and slower. At faster sweep speeds, Normal acquire mode can capture the narrow peaks.

At sweep speeds slower than 1 ms/div, the oscilloscope can acquire more samples than can fit into MegaZoom memory. The oscilloscope selects samples to store such that no local minimum or maximum wider than 5 ns is missed. In peak detect mode, narrow glitches and sharp edges are displayed more brightly than when in Normal acquire mode, making them easier to see.

54640-seriesPeak detect acquire mode displays any signal pulse wider than 1 ns, allowing you to find glitches and narrow spikes regardless of sweep speed.

Because of MegaZoom memory, peak detect is only necessary at sweep speeds of 500 ∝ s/div and slower. At faster sweep speeds, Normal acquire mode can capture the narrow peaks.

At sweep speeds slower than 500 ∝ s/div, the oscilloscope can acquire more samples than can fit into MegaZoom memory. The oscilloscope selects samples to store such that no local minimum or maximum wider than 1 ns is missed. In peak detect mode, narrow glitches and sharp edges are displayed more brightly than when in Normal acquire mode, making them easier to see.

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