Dear, ADI Eng Zone community
I tried to use the AD5933 Eval Board by following the application note: AN-1053. I started with the system setup. The result works well (like Pic.1 at below) as shown in Fig.2 page3 in AN-1053, then I moved to measure unknown impedance 15 pF capacitor as AN-1053 recommended, but the measuring result didn't change by the frequency (50-55 kHz) as shown in Pic.2.
What's wrong or what am I wrong?