Application Examples
56 TDS1000/2000-Series Digital Oscilloscope User Manual
Capturing a Single-Shot Signal
The reliability of a reed relay in a piece of equipment hasbeen poor
and you need to investigate the probl em. You suspect that the relay
contacts arc when the relay opens. T he fastest you can open and
close the relay is about once per m inute so you need to capture the
voltage across the relay as a single-shot acquisition.
To set up for a single-shot acquisition, follow these steps:
1. Turn the vertical VOLTS/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 Trigger Menu.
5. Push the Slope option button and select Rising.
6. Turn the LEVEL knob to adjust the trigger l evel to a voltage
midway between the open and closed volt ages of the relay.
7. Push the SINGLE SEQ button to start the acquisition.
When the relay opens, the oscilloscope triggers and capturesthe
event.