At uni, I carried out some lab observations involving a CR circuit (4V AC power source, capacitor, resistor in series, in than order) with the following parameters:
Here are my observations in graph form:
I attempted to measure the slope in dB/decade and recieved a value of $$g \approx +28.3dB/dec$$ but I thought values for the slope could not exceed $$g = \pm20dB/dec$$ for any first-order filters.
Any ideas why would this happen? (i.e. anything wrong with my lab setup, unforseen variables, etc.)