A stand alone Arduino Uno can not be used to create a frequency response analyzer. It is to slow.
However, the following link shows how to create a poor mans bode plotter using an Arduino board, an AD9850 and an oscilloscope.
<http://reibot.org/2013/08/16/bode/>
There is a LINX example for the AD9850. This Bode plotter does not measure phase.
A more supplicated frequency response analyzer can be created using Labview and the approach shown in the fallowing link.
<http://www.ti.com/lit/an/snva700/snva700.pdf>
hrh1818
