I this video I look at the output of a Low Distortion Sine Wave Board from AilExpress. I am using a Hewlett-Packard 331A Distortion Analyzer and as extras in the cast are a Spectrum Analyzer and an Oscilloscope. The board delivers a 1KHz nominal, 20dB, 7.75 Volt, 100mW across 600 Ohms. It is specified at 0.064 % distortion, I measured 0.01, as low as the HP could do.
18 апр 2023