MATLAB XPC TARGET RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 368)

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get (scope object)

Property Description Writable

when the fil e is closed and not du r ing each f ile

write ope ration. This mode is faster, but if the

system crashes before the file is close d, the

file system might not know the actual file size

(the file contents, however, will be intact).

For scopes of type

Host, this parameter has

no effect.

NumPrePostSamples

For scopes of type ' Host ' or 'Target',this

parameter is the number of samples collected

before or after a trigger event. The default

value is 0. Entering a ne ga tiv e va lue collects

samples before the trigger event. Entering

a positive value collects samples after the

trigger event. If you set

TriggerMode to

'FreeRun', this property has no effect on data

acquisitio n.

Yes

NumSamples

Number of contiguous samples captured

during the acquisition of a data package. If

the scope stops before capturing this number

of samples, the scope has the collected data up

to the end of data collec tion, then has ze roes

for the remaining uncollected data. Note

that you should know what type of data you

are collecting, it is possible that your data

contains zeroes.

For scopes of type

'File', this parameter

works in conjunction w i th the AutoRestart

check box. If the AutoRestart box is selected,

the file scope collects data up to Number of

Samples, then starts over again, overwriting

the buffer. If the AutoRestart box is not

selected, the file scope collects d ata only up to

Number of Sam ples ,thenstops.

Yes

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MATLAB XPC TARGET RELEASE NOTES Guide de l'utilisateur Page 368

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