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Example 1: Displaying a Waveform
TDS 620A, 640A, & 644A User Manual
1. To create an unstable display, slowly turn the trigger MAIN LEVEL knob
(see Figure 1-9) first one direction, then the other. Observe what happens
when you move the trigger level above the highest part of the displayed
waveform. Leave the trigger level in that untriggered state.
2. Press AUTOSET (see Figure 1-10) and observe the stable waveform
display.
MAIN LEVEL Knob
Figure 1-9: TRIGGER Controls
AUTOSET Button
Figure 1-10: AUTOSET Button Location
Figure 1-11 shows the display after pressing AUTOSET. If necessary, you can
adjust the waveform now by using the knobs discussed earlier in this exam-
ple.