Multifunction DAQ

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question about DAQ sampling rate

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Hi,

 

As you can see the screenshot below, why aggregate multichannel sampling rate is lower than single channel sampling rate? 

ni.PNG

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@zyb1003 wrote:

Hi,

 

As you can see the screenshot below, why aggregate multichannel sampling rate is lower than single channel sampling rate? 

ni.PNG


You have a device that is muxed. The A/D conversion is shared between all of the channels. You would need a card that has a separate A/D for each channel, like the 6366.

 

mcduff

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Hi Mcduff,

 

You didn't get what I mean. Even though sampling rate is shared by channels, but in principle the aggregate rate should be same as maximum single channel rate. 

 

I searched similar question, seems reason is channel needs switching time for multichannels which sacrifice half sampling rate. 

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