Fast pulses acquisition with PCI-5122

[danieleviola]

Hello,

I need to acquire many single light pulses. I'm using pci-5122.

The pulses are at 1Khz, I modified the example file "niScope EX Multi Record Fetch More Than Available Memory Producer Consumer 8_2.vi" as in attachment.

I'd like a matrix output with a pulse waveform per row, but I don't know how to do that, I have problem extracting the waveform from the second (consumer) loop.

Thanks for your help!

Hello,I need to acquire many single light pulses. I'm using pci-5122.The pulses are at 1Khz, I modified the example file "niScope EX Multi Record Fetch More Than Available Memory Producer Consumer 8_2.vi" as in attachment.I'd like a matrix output with a pulse waveform per row, but I don't know how to do that, I have problem extracting the waveform from the second (consumer) loop.Thanks for your help!

[danieleviola]

Hello,

I modified my vi as in attachment, now the writing to file is the same as in the example "

Multi Record Fetch More Than Available Memory Producer Consumer 8_2.vi".

But I'd like to have a spreadsheet or a matrix, with a waveform in every row, how can i do?
Thank you

[#3]

Multi Record Fetch More Than Available Memory Producer Consumer 8_2.vi".

But I'd like to have a spreadsheet or a matrix, with a waveform in every row, how can i do?
Thank you

[LiciaP · Accepted solution]

Hi,

in your VI you are writing to a TDMS file, thus a binary file. Would you like to save to a spreadsheet or txt file instead? Or simply have the waveform data available in other datatype in LabVIEW?

The output of Dequeue Element.vi is 1D array of waveform: each waveform element is a cluster of dt (a double value), t0 (a double value) and an array of double values. Thus, if you need to obtain a 2D array with all the data (if I understood correctly), you will have to index each elemnt of the 1D array of waveform, extract the double array contained in each waveform and then build a 2D array.

You can find an example here.

I hope this helps!

Bye,

Licia

[danieleviola]

Thank you!
That's exactly what I want to do, but I don't know how.

I will take a look at the example and let you know.

Thanks again!

[danieleviola]

Here it's how I solved it: after the Dequeue Element I used Index Array, Get Waveform Components, and I passed the data through the loop with a Auto-Indexed Tunnel, to the Write To Spreadsheet File.

The big problem was that I couldn't find out how to have a Auto-Indexed Tunnel, instead of a Loop Tunnel, so I copied it from a loop I had in another project where I automatically got an Auto-Indexed Tunnel.

[LiciaP]

Hi,

I'm really glad you have been able to solve and to have been of help!

In general, to enable auto-indexing on an output tunnel, you just have to right-click the tunnel and select "Enable indexing".

Bye!

Licia