Frequency Response of NI Elvis Board: Calculating Amplitude Error

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SUMMARY

The discussion centers on calculating amplitude error for frequency response measurements using the NI Elvis prototyping board and the NI Bode analyzer. The amplitude specification of the Bode analyzer is given as 12 bits, and the user seeks to determine how to compute the amplitude error based on this specification. The measurements are expressed in decibels (dB), and the user emphasizes the need for a practical calculation to account for measurement error in their lab report on an active filter.

PREREQUISITES
  • Understanding of amplitude error calculations in digital signal processing
  • Familiarity with the NI Elvis prototyping board
  • Knowledge of the NI Bode analyzer and its specifications
  • Basic concepts of frequency response and dB measurements
NEXT STEPS
  • Research how to calculate amplitude error using 12-bit quantization
  • Explore the impact of noise on measurement accuracy in electronic experiments
  • Learn about the specifications and capabilities of the NI Bode analyzer
  • Investigate best practices for documenting lab experiments in signal processing
USEFUL FOR

Electronics students, engineers working with signal processing, and anyone involved in lab experiments requiring precise amplitude measurements.

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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