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Basic Operation
MSO5000D Digital Storage Oscilloscope User Manual 33
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Time
20ns to 10.0sec
Press F4 to select this option. Turn the multi-functional knob
to set the time span.
Overtime Trigger: In Pulse Width trigger, you may sometimes be puzzled with the long time for
trigger, as you do not need a complete pulse width to trigger the oscilloscope, but want the trigger
occurs just upon the overtime point. This is called Overtime Trigger.
Options
Settings
Comments
Type
OT
Source
CH1
CH2
Select the trigger source.
Polarity
Positive
Negative
Select to trigger on positive or negative pulses.
Mode
Auto
Normal
Overtime
t
Press F5 to select Overtime option and adjust V0 to set the
time.
Coupling
AC
DC
HF Reject
LF Reject
Selects the components of the trigger signal applied to the
trigger circuitry.
Holdoff: To use Trigger Holdoff, push the HORIZONTAL Menu button and set the Holdoff Time
option by pressing F4. The Trigger Holdoff function can be used to generate a stable display of
complex waveforms (such as pulse trains). Holdoff is the time between when the oscilloscope
detects one trigger and when it is ready to detect another. During the holdoff time, the oscilloscope
will not trigger. For a pulse train, the holdoff time can be adjusted to let the oscilloscope trigger only
on the first pulse in the train.
5.5 Menu and Option Buttons
As shown below, these six buttons at the top of the front panel are used mainly to recall relative
Trigger Level
Indicates
Trigger Points
Holdoff
Holdoff
Acquisition Interval
Acquisition Interval
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