how to measure SNR and power spectrum of a signal practically?

[membership]

Dear all Hi;
I've implemented sigma delta ADC on cyclonII DE1 FPGA.
the analog input is digitized at the multi-bit output
now I want to evaluate the output by measuring the Signal to Noise Ratio (SNR) and ENOB and power spectrum but I dont know how to do that in practice?
using which software or which device?
and how to get the diagrams for SNR and Power spectrum?
can anybody guide me?
Thank you

ps: some input and output were attached

 

[GUMY]

Using the spectrum analyzer.

 

[membership]

GUMY thanks for you reply
I am not sure whether I can access to spectrum analyzer in our lab, but if I could found one how can I connect my 16-bit output to that?
after that does it show me the power spectrum and SNR?
have you work with it before?

 

[GUMY]

Sorry, my mistake. You can not connect spectrum analyzer to digitized outputs. As You have digital values it is probably the matter of mathematical analysys (Fourier transformation). I would try to do it with LabView. I am not familiar with other tools.