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56
TDS1000/2000-Series Digital Oscilloscope User Manual
Capturing a Single-Shot Signal
The reliability of a reed relay in a piece of equipment has been poor
and you need to investigate the problem. You suspect that the relay
contacts arc when the relay opens. The fastest you can open and
close the relay is about once per minute so you need to capture the
voltage across the relay as a single-shot acquisiti on.
To set up for a singl e-shot acquisition, follow these steps:
1. Turn the vertical VOL TS/DIV and horizontal SEC/DIV knobs to
the appropriate ranges for the signal you expect to see.
2. Push the ACQUIRE button to see the Acquire Menu.
3. Push the Peak Detect option button.
4. Push the TRIG MENU button to see the Trigge r Menu.
5. Push the Slope option button and select Rising.
6. Turn the LEVEL knob to a djust the trigger level to a voltage
midway between the open and closed voltages of the relay.
7. Push the SINGLE SEQ button to start the acquisition.
When the relay opens, the oscilloscope triggers and captures the
event.