Capture continuously signal using TDS 1002B

[Naser1363]

Hello,

I want to capture 2 signal using TDS 1002B using USB in labview. I want to capture continuously my signal in Time based 0.0005 second.

But when I initial oscilloscope in labbview it is not work (please see attached file 1).

When I use a Auto Setup configuration in my Loop it is work but It has 2 problem (please see attached file 2).

1- I lost Time based 0.0005 second.

2- In any iteration in For loop Auto setup must be config so this process takes many time.

Would you please help me.

[Dennis_Knutson]

What exactly do you mean 'does not work'? All that you have done is place a for loop around the read in one of the examples that comes with the driver. Do you get an error?

[Naser1363]

It mean that when I want to read a Sin signal using oscope file 1 shown a signal similar noise but file 2 shown Sin signal.  

[Dennis_Knutson]

I would suggest you try the Acquire Continuous Waveform example. After configuring the second channel, add another fetch waveform to get channel 2.

[Naser1363]

Thank you.

I see example for continuous Aquire but it has for 1 channel only.Would you please tell me how add 2 channel to this example.

Do perfom 2 channel simoultanosly sampling with this method?

Best regards

[Dennis_Knutson]

Yes, you just have to add the configuration for the second channel. You have that configuration in the example you have. Then, as I said, inside the loop you have to add another fetch to get the waveform for the second channel. Look inside the Read Muliple Waveforms VI. I has a single fetch inside a for loop with a channels array. You can also do it that way instead of adding a second fetch.

[Naser1363]

Thank you again

Would you please how you added 2 channel using array to Fecth?(please see attached file)

regards

[Dennis_Knutson]

Place another for loop around the fetch with auto-indexing enabled so that the fetch will be run twice with each iteration of the outer for loop.