In Chapter 13 of Numerical Recipes Example Book second edition there is an example program called xevlmem that produces the following output from 1000 data samples:

f*delta power
0.0000 0.026023
0.03125 0.029266
0.062500 0.193000
0.09370 0.139200
0.125 29.9155
0.15600 0.003878
etc.
etc.

My question is very simple... Given the f*delta of 0.125 with a spectral estimate of 29.9155, what is the frequency of the signal that generated the 29.9155 estimate?

How do I map the f*delta range of 0.0000 to 0.50 into frequencies of the sample?

Thank you for your help.
Mike