do i have the buffer in the right place

[reggie2016]

Well I am trying to Generate and record signals in saline solution simultaneously for 4seconds. Im using 81 channels to record this so i wanted around 324000 samples total or 4000 samples per channel.

[reggie2016]

Are you still going to help me?

[dkfire]

Okay just try to recapture what you are saying:

You want to have 4000 samples pr. channel from a 4 sec. run.

That will give you a 1kHz sample rate, no matter how many channels you have. 

Then you are reading from 81 channels? That is a lot of channels.

Do you only want to read your input signals for 4 sec?

Start by trying to read one channel at 1kHz sample rate for 4 sec.

Try to read 100 sample from the DAQ every loop iteration.

That means that your loop should run 40 times. ( 100samples@1kHz rate * 40 = 4000samples@1kHz rate = 4000ms = 4 sec)

Then adding 80 channel after that should be easy.

[reggie2016]

I want to generate and acquire signals for 4 seconds and ill try this. Another thing is that I am losing data from my tdms file to another labview vi why is this.

[reggie2016 · Accepted solution]

According to Excel I am getting 4000 samples per channel at a sample rate of 1000s/s using 81 channels over 4 seconds. But when I try to run the excel file in labview and see the size of it, it only reads around 2900s/s. Can anyone tell me why. I attach the file that I am using.

[crossrulz]

You are missing a couple of subVIs, so we can't really see what you are doing with the data.  Zip up your project and post the zip file.

[reggie2016]

Sorry here you go.

[crossrulz]

Still missing the Read Data.vi.

[reggie2016]

I will not be able to give it to you until tomorrow

[reggie2016]

Here is the read data file i just need help understanding how it runs.