Tektronix TDS220 Oscilloscope

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The Display

The display shows a lot of information. The diagram below describes all of the visual indicators available on the display:

Oscilliscope display description.png

When acquiring a signal, it may appear differently depending on the settings of the oscilliscope. The diagram below describes the different bahaviors:

Oscilliscope waveforms.png

Acquiring

When you acquire analog data, the oscilloscope converts it into a digital form. You can acquire data using three different acquisition modes: sample, peak detect, and average. The timebase setting affects how rapidly data is acquired.

Oscilliscope acquiring.png

Triggering

The trigger determines when the oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, it can convert unstable displays or blank screens into meaningful waveforms.

Oscilliscope trigger waveforms.png

When the oscilloscope starts to acquire a waveform, it collects enough data so that it can draw the waveform to the left of the trigger point. The oscilloscope continues to acquire data while waiting for the trigger condition to occur. After it detects a trigger, the oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point.

The table below describes the options in the Trigger Menu (for Edge Trigger - most commonly used):

Oscilliscope trigger menu.png