question about DAQ sampling rate

[zyb1003]

Hi,

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

[mcduff]

---

@zyb1003 wrote:

Hi,

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

---

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

[zyb1003]

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. 

[santo_13 · Accepted solution]

This may be helpful
http://zone.ni.com/reference/en-XX/help/370466Y-01/mxcncpts/multisimulsamp/