Agilent Technologies 22D Guida Utente Scaricare il pdf (Pagina 77)

3-15

Triggering the Oscilloscope

To use Pulse Width triggering

3 Press the pulse polarity softkey to select positive ( )or negative ( )

polarity for the pulse width you want to capture.

The selected pulse polarity is displayed in the upper-right corner of the display.

A positive pulse is higher than the current trigger level or threshold and a

negative pulse is lower than the current trigger level or threshold.

When triggering on a positive pulse, the trigger will occur on the high to low

transition of the pulse if the qualifying condition is true. When triggering on a

negative pulse, the trigger will occur on the low to high transition of the pulse

if the qualifying condition is true.

4 Press the qualifier softkey (< > ><) to select the time qualifier.

The Qualifier softkey can set the oscilloscope to trigger on a pulse width that is:

• less than a time value (<).

For example, for a positive pulse, if you set t<10 ns:

• greater than a time value (>).

For example, for a positive pulse, if you set t>10 ns:

• within a range of time values (><).

For example, for a positive pulse, if you set t>10 ns and t<15 ns:

Trigger

10 ns

Trigger

10 ns10 ns

Trigger

12 ns

15 ns

10 ns

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Agilent Technologies 22D Guida Utente Pagina 77