SFDR Measurement

[tbaldonado]

What is the easiest method of measuring Spurious Free Dynamic Range with LabVIEW? I am a new user, please provide a detailed explanation.

[Ankita A.]

Hi,

Please check out the following document for more information on SFDR.
http://digital.ni.com/public.nsf/websearch/7C77898F35A951E086256BF100686FED?OpenDocument

Also, I am attaching a vi where I generate a sine wave, add noise to it to get a noisy signal, take the power spectrum and find the maximum amplitude, apply a bandstop filter to remove the principal frequency component from the original noisy signal, again compute the power spectrum and find the maximum amplitude. SFDR is the difference between the two amplitudes.

Though this vi is a good starting point, you might want to build on it to improve the functionality. For example, you can take average of several power spectrums and then calculate the SFDR.

Regards,
Ankita A.
Applications
Engineer
National Instruments

[tbaldonado]

Hi!

Thanks for the information regarding SFDR. Unfortunately, I am using version 7.0 and your vi was created in 7.1. Is it possible for you to recreate the vi in 7.0 and resend it? I am putting together a proposal for management in order to buy the tools and this would be a great selling point.

Regards,
Troy Baldonado
Digital Engineer
KOR Electronics, Inc.