PCI-6023E & digital output

Hello,
I have a PCI-6023E and I want to generate a continous pulse train with a digital output line, and I need to know the maximum frequency for this pulse train that I can generate.
Thanks a lot for your answer.
Regards, Anacelia

Hi Anacelia,
You should not realy on this answer without verifying with NI first. So here goes.
Page 347 of the catalog indicates the supported data transfer mode is "programed I/O". This indicates that each line state change must be initiated by an operation of the controlling software. Therefore, the upper frequency limit is determined by how often the code that sets or resets the line runs.
So, the upper limit is determined by the software and the environment it is running in. If you are woring in Windows environment, and your machine is faster than about 400 Mhz then there are two factors to concider when answering your question. How fast does the code run, and how deterministic is it.
If determinism is not an issue, you could resonably expect to get
about one update every 10ms if the code is clean. This would give you 100 update per second or about 50Hz.
If determinism is required, and you are not running in a Real Time environment, the above estimates should be backed off. Anything above 5-10Hz is going to be questionable.
Like I said, verify what I have said with NI.
I hope this helps,
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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But please have a look at following article concerning laptop compatibility: http://zone.ni.com/devzone/cda/tut/p/id/5035
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NI-DAQmx: Correlated Digital I/O with NI CompactDAQ and LabVIEW
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But please contact you local National Instruments office if you need more information.
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Hi
I am a beginner in Labview and would appreciate any advice on how to solve the following problem.
I am creating a TTL pulse train, and would like to send that into Labview as input. For every falling edge detected on the input signal, I'd like Labview to generate 4 digital output pulses. For each output pulse, I'd like to be able to specify the delay, and duration. The picture should illustrate it more clearly, with the numbers showing the intended order of magnitude.
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Solved!
Go to Solution.

Hi Yann,
Wow, thank you so much for this example! I'm trying to take a look at it, but when I run it.. it responds with the following error message
Error -200452 occurred at Property Node DAQmx Trigger (arg 1) in DAQmx Start Trigger (Digital Edge).vi:1->reprise-1.vi
Possible reason(s):
Measurements: Specified property is not supported by the device or is not applicable to the task.
Property: Start.TrigType
Task Name: _unnamedTask<49>
This is strange too, because ive already used the Digital Edge Start trigger for a different application with this card.
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NI Hardware: PXI-7853R, PCI-5122, PCI-6733, PXI-1036, PCI-MIO-16E-4, PCI-6110
Computer Hardware: Xeon Quad Core - 2.33 Ghz, 8 GB RAM
Software: Labview 2009, Labview FPGA 2009, Vista 64-bit, MAX 4.6, DAQmx 9.0, NI-SCOPE 3.5

PCI-6023E & digital output

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