I connected an incductor in parallel with a capacitor, supposed to resconate at a certain frequency. The meter was connected in series with those two components and the voltage source, to monitor the current. As the frequency got closer to the resconance point the meter showed a decrease in current as expected, but then past a certain point it started showing a current bouncing up and down without displaying an exact value. (It was powered by a square wave, can the higher frequency harmonics that do not resconate somehow confuse the meter?)