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Questions about IQ sample rate

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Hi,

 

When I set some sample rates for USRP N210 and check the actual sample rates, some of them show the same values of my settings, but other of them show a little different values. For example, when I set 3M, the actual sample rate is 3.030303M, set 3.5M, the actual rate is 3.448275M, and set 1.5M, the actual rate is 1.492357M. But when I set 1M, 2M, 4M, 4.5M and 5M, the actual rates are the same.

 

I don't know why. And I think when the actual rate is different from my setting, the transmit signal may not be what I design.

Can anyone help me? Thank you very much.

 

NovaQ

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Hi, could you please tell me how do you check the actual sample rates?

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Hi, I use the niUSRP Configure Signal Vi to see the coerced IQ rate.

According to the link: http://www.ni.com/documentation/en/labview-comms/1.0/usrp-node-ref/niusrp-configure-signal/, coerced IQ rate is the actual IQ rate.

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Solution
Accepted by topic author NovaQ

OK,I got your question.In fact each device has accuracy, and if the error is within the accuracy range, we consider it reasonable. The absence of such an error does not have a specific condition or situation. So you find this situation is normal, and it will not affect your operation.

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