Agilent Technologies DP235 Guía de usuario descargar pdf (Pagina 175)

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Using the Oscilloscope

The Scope Trigger Menu

If the count set in the Count field is one, the trigger event will be the

first pattern event that meets both the pattern specification and the

duration specification. If the count is greater than one, only the first

pattern event must meet the duration specification. Once the pattern

duration specification has been met, subsequent pattern events that

meet the pattern specification can be of any duration and each such

pattern event will contribute to meeting the count specification. For

instance, with a pattern specification of HX, a duration specification of

>60 ns & <100 ns, and a count of 3, a pulse string with pulse widths 200

ns, 80 ns, 150 ns, 50 ns, 75 ns, 20 ns would trigger on the trailing edge

of the 50ns pulse. In this example, the 80 ns pulse meets the duration

specification and is count 1, the 150 ns pulse is count 2, and the 50 ns

pulse is count 3.

Count field

In pattern trigger mode, you can define a pattern as a trigger qualifier.

When the oscilloscope detects the trigger qualifier, it will trigger when

the number of patterns specified in the Count field have occurred on all

inputs.

The Count field defines the number of events that must occur after the

first trigger qualifier before the oscilloscope will trigger and acquire a

waveform.

Count can be set to any integer from 1 to 32,000. The default value for

the Count field is 1.

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 627 628

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