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Source Selection

Click or tap the Source drop-down button to select CH1-CH4 or D0-D15. For details,

refer to

Trigger Source

. The selected trigger source is indicated in the trigger

information label at the top of the screen.

Only when you select the channel that has signal inputs as the trigger source, can you

obtain a stable trigger.

Polarity

In the Polarity item, select the desired polarity: positive polarity ( ) or negative

polarity ( ).

Trigger Condition

Set the trigger condition in the When item.

• When you select "Positive" for polarity, ">" for trigger condition, the oscilloscope

triggers when the positive pulse width of the input signal is greater than the

specified pulse width.

• When you select "Positive" for polarity, "<" for trigger condition, the oscilloscope

triggers when the positive pulse width of the input signal is smaller than the

specified pulse width.

• When you select "Positive" for polarity, "< >" for trigger condition, the

oscilloscope triggers when the positive pulse width of the input signal is greater

than the specified lower limit of pulse width and smaller than the specified

upper limit of pulse width.

• When you select "Negative" for polarity, ">" for trigger condition, the

oscilloscope triggers when the negative pulse width of the input signal is greater

than the specified pulse width.

• When you select "Negative" for polarity, "<" for trigger condition, the

oscilloscope triggers when the negative pulse width of the input signal is smaller

than the specified pulse width.

• When you select "Negative" for polarity, "< >" for trigger condition, the

oscilloscope triggers when the negative pulse width of the input signal is greater

than the specified lower limit of pulse width and smaller than the specified

upper limit of pulse width.

Pulse Width Setting

• In the

When menu, when ">" or "<" is selected, click or tap the input field of

Upper or lower to set the upper limit value or the lower limit value with the

pop-up numeric keypad. You can also use the corresponding multipurpose knob

to set the value. The pulse width available is from 1 ns to 10 s.

Triggering the Oscilloscope

Rigol DHO924 User Manual

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