Frequency Response Analyser or Impedance Spectroscopy

[ww1]

Hi

I am looking for a Labview program to allow the freq. response of say a
tuned circuit.
I will be using a GPIB Function Gen. From 1Hz to 10MHz and measuring the
peak-peak value across a shunt resistor that is in series with the tuned
circuit.
Thus as the frequency increases then the tuned circuit will respond
accordingly. If we take samples every 100Hz then we can produce a spectra
of the tune circuit.
I actually going to use this for measuring the char. of an electrochemical
cell.

Any Suggestions



Wayne

[Christian_L]

Hello Wayne,

Your application sounds like a fairly typical frequency response application such as measuring the response or transfer function of a filter. In this case your tuned circuit is behaving like a filter. There are many examples of these types of application using LabVIEW. One of the standard examples in LbVIEW is a frequency response measurement. You can find this example in the following location.

..\National Instruments\LabVIEW 7.0\examples\apps\freqresp.llb

Of course the interface for the signal generator and measurement device will need to be adapted to your hardware.

You can also find several other similar examples in the Developer Zone library.

Frequency Response (step response method)
System Simulation Sandbox
Frequency Response using Swept Sine

Christian L