MATLAB XPC TARGET 4 - API GUIDE Uživatelská příručka stáhnout pdf (Strana 32)

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101

2 Targets and Scopes in the MATLAB Interface

2-14

• For Scope 2, set the following values:

sc(2).ScopeId = 2

- sc(2).TriggerMode = 'Scope'

- sc(2).TriggerScope =1

- sc(2).TriggerSample = range 0 to (N + P - 1)

In the figures below, TP is the trigger point or sample where a trigger event

occurs. Scope 1 begins acquiring data as described.

In the simplest case, where

P = 0, Scope 1 acquires data right away.

“Pretriggering (P<0)” on page 2-14 illustrates the behavior if

P, the value of

NumPrePostSamples, is negative. In this case, Scope 1 starts acquiring data |P|

samples before

TP. Scope 2 begins to acquire data only after TP occurs.

Pretriggering (P<0)

“Posttriggering (P>0)” on page 2-15, illustrates the behavior if P, the value of

NumPrePostSamples, is positive. In this case, Scope 1 starts acquiring data |P|

samples after

TP occurs.

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