But real-world resistors are unlikely to have a lot sequence inductance, and no collection capacitance, so you may want to toggle the button at the lower proper from 'Show Series' to 'Show PARALLEL'. Toggle to Spectrum show mode and observe the harmonic peaks relative to the main signal peak at 1031.25 Hz. Even simpler, some models have a display like a digital radio with up and down buttons for changing frequency. RF (radio frequency indicators) will find their manner into audio equipment and produce a hum or other kinds of noise. Monitor the signal on good quality radio.