Near Simultaneous Output and Reading

 
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liemph
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Joined: 14 Mar 2003
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Location: JAPAN
PostPosted: Fri May 02, 2003 2:53 am    Post subject: Near Simultaneous Output and Reading Reply with quote
I use VB for collecting and displaying the measurement results from my DrDaq. The following may be a stupid question. Using the provided pico DLL, could I send a 1 ms pulse to the digital output while making a fast mode measurement (i.e. simultaneous output and reading) to see the response of a circuit to the pulse ? Question
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matthew
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Joined: 25 Sep 2002
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PostPosted: Fri May 02, 2003 8:11 am    Post subject: Reply with quote
Hi,

The digital out is a direct connection from a parallel port pin, therefore its response depends on your PC and windows.

I wouldn't recommend using it for timing critical applications. Also ... because single processor PCs are ultimately single threaded in terms of execution order, you would stop fast-sampling whilst the digital out was changing state. This could affect your results by leaving gaps in your data.

Best Regards,
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