output impedance power supply
for this u should be using PSpice software wchi give u the capabiltty of meaasuring the output of the circuit in frequecy domain.i designed my Low Pass,High Pass and Band pass filters, and analized their responce in trerms of voltage as the frequency increases.it well fine on th simitulation's and also ater their practical implemtation. so i think instead of voltage probe u use a resistevie analizing probe on the output, after desining ur circuit on the PSpice software, then analize it in the frequency domain......
I hope it would help u sir.
TC..........