For those worrying that [Faransky] is relying on the PWM functionality of the Arduino Nano to generate waveforms, have no fear. At the heart of the device is a AD9833 waveform generator ...

In a prior research project in the communications field, we created a portable, low-frequency (0 to 1 ... The original generator had an AD9833 direct digital synthesis (DDS) IC at its core ...