Indicator Lights
There are three indicator lights near the top-left corner of the oscilloscope.
These lights can give you a quick indication about the acquisition status of
the oscilloscope.
Armed
When the armed light is turned on, it indicates that the trigger circuit is
armed and waiting for a valid trigger event to occur. A valid trigger event
occurs when a signal meets the triggering conditions set up in the trigger
menu.
In single-shot applications, when the armed light turns off, you know that the
oscilloscope has triggered. If the screen does not display any data, the lack of
data indicates that you need to change the channel and time base menus to
properly display the signal. Also, you may have to reacquire the data after
changing the setup conditions on the ocilloscope to display the signal.
Triggered
When the triggered light is on, it indicates that the oscilloscope accepted a
trigger event. Every time the oscilloscope accepts a trigger event, it makes
one time base sweep and displays the data that is acquired during that sweep.
When you are in the trigger menu and the oscilloscope is internally triggered,
a line is displayed that represents the trigger level. You can use this line to
help you determine where to set the trigger level on the signal for your
application.
Front-Panel Features
Indicator Lights
2–10
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