Tutorial
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TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
3. Turn the horizontal SCALE knob one click clockwise. Observe the time
base readout at the bottom of the display. The time base should be set to
200 ms/div now, and you should see two complete waveform cycles on the
display.
When you first connect a signal to a channel and display it, the signal displayed
may not be scaled and triggered correctly. Use the autoset function and you
should quickly get a meaningful display.
You should have a stable display of the probe compensation waveform from the
last step. Do the following steps to first create an unstable display and then to
automatically obtain a stable display:
1. To create an unstable display, slowly turn the trigger MAIN LEVEL knob
(see Figure 2–7) 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 2–8) and observe the stable waveform display.
MAIN LEVEL Knob
Figure 2–7: TRIGGER Controls
AUTOSET Button
Figure 2–8: AUTOSET Button Location
Figure 2–9 shows the display after pressing AUTOSET. If necessary, you can
adjust the waveform using the knobs discussed earlier in this example.
Autoset the Oscilloscope
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