Problem in plotting Frequency Response

I have samples of a signal varying form 100MHz to 110MHz. How do i plot the frequency response of this signal? I tried fvtool() and fft(). But these plots give me NORMALIZED frequency response. Is there any other method to plot the absolute freq response?

Answer 1

[Honglei Chen]

On the fvtool menu bar, you can click Analysis -> Sampling Frequency to specify the sampling rate. fvtool will then scale the frequency axis according to the sampling rate.

HTH