User manual

Table Of Contents

USB DrDAQ User's Guide 9

3.3.4

Using the trigger

The PicoScope trigger can be used to capture infrequent or one-off events. As an

example, click your fingers over the microphone: a waveform is displayed but

vanishes as soon as the display updates. The correct way to capture such a signal is

to use a trigger.

Stop PicoScope (click on the 'Stop' icon at the bottom left hand corner of the window,

or press the space bar) and select a single trigger using the trigger options at the

bottom of the screen. Press the space bar to start PicoScope and click your fingers

over the microphone. The single trigger option means that PicoScope stops running

when it has captured a signal.

3.3.5

Adding spectrum views

So far we have looked at the oscilloscope functions. PicoScope allows USB DrDAQ to

be used as a spectrum analyser as well. The buttons on the top left-hand side control

the oscilloscope, and spectrum views.

- Oscilloscope view (view signals against time)

- Spectrum analyser view (view amplitude against frequency)