User manual

Reference

Options Settings Comments

Polarity Positive, Neg

ative

Select to trigger on positive or

negative pulses

Mode Auto, Normal

Select the type of triggering; Normal

mode is best f

or most Pulse Width

trigger applications

Coupling AC, DC, Noise Reject, HF

Reject, LF Reject

Selects the components of the trigger

signal applied to the trigger circuitry;

(See page 95, E

dge Trigger.)

More Use to switch between submenu

pages

Available only on a 4-channel oscilloscope.

Key Points

Trigger When. The pulse width of the source must be ≥5 ns for the oscilloscope to

detect the pulse.

When options Details

≠

Triggers the oscilloscope when the signal pulse width is equal to or

not equal to the speciﬁed pulse width within a ± 5% tolerance

Triggers the oscilloscope when the source signal pulse width is less

than or greater than the speciﬁed pulse width

Refer to the Application Examples chapter for an example of triggering on

aberrant pulses. (See page 44, Triggering on a SpeciﬁcPulseWidth.)

98 TBS1000 Series Oscilloscopes User Manual