Triggering
TDS5000 Series User Manual
3-55
Overview Control elements and resourcesTriggering from the front panel
Set the trigger
level
4. To manually change the trigger level for edge triggers
(or certai n threshold levels for logic or pulse triggers),
turn the LEVEL knob. You can al so set the level in the
Trigger Setup control window.
Set trigger level
to 50%
5. To quickly set the edge trigger level to 50% of the
waveform voltage range, push the LEVEL knob. The
oscilloscope sets the trigger level to the halfway point
between the peaks of the trigger signal. This function
has no effect for t he other trigger types.
You can also click Set 50% in t he Trigger Setup control
window.
Select the
trigger source
6. Push the up and down arrow buttons to select a
SOURCE:
H CH 1 through CH 4 are the input channels. The
channel you select as a trigger source will function
whether it is displayed or not.
H EXT is a fifth, nondisplayable auxiliary (external)
trigger source. To use the auxiliary trigger, connect
the source to the front-panel AUX IN connector.
H LINE is the AC line voltage. The oscilloscope is
used to generate the trigger and you do not have to
input a signal. The trigger l evel is fixed at zero
volts.
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