Frequency Response of NI Elvis Board: Calculating Amplitude Error

AI Thread Summary
The discussion focuses on calculating amplitude error for an active filter experiment using the NI Elvis prototyping board and NI Bode analyzer. The user seeks guidance on how to compute amplitude error based on the 12-bit accuracy specification provided by the Bode analyzer, with measurements expressed in dB. There is a distinction made between real-world noise affecting measurements and the idealized conditions often assumed in academic settings. The user emphasizes the need for a clear calculation method to account for measurement error in their lab report. This highlights the importance of understanding specifications and their practical implications in experimental setups.
Ald
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I've run an experiment on an active filter. I am using the NI Elvis prototyping board. The frequency response is taken with the NI Bode analyzer and I saved the output data in a text file. The Bode analyzer amplitude spec is give as 12 or 16 bits, how do I calculate the amplitude error using the 12 bit accuracy spec? The measurements are in dB.
 
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Ald said:
I've run an experiment on an active filter. I am using the NI Elvis prototyping board. The frequency response is taken with the NI Bode analyzer and I saved the output data in a text file. The Bode analyzer amplitude spec is give as 12 or 16 bits, how do I calculate the amplitude error using the 12 bit accuracy spec? The measurements are in dB.

This sounds like homework. What are your thoughts? In the *real world* the error will depend on the noise environment. In the *homework world* there may be no noise...
 
It is homework in the sense I'm writing up a lab on did on an active filter and I have to take into account the measurement error of the output. The spec was very vague to me, the Bode analyzer had an amplitude error of 12 bits. I just need a reasonable calculation to the error in reading the amplitude of the output of the filter.
 

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