When Tektronix gave me my MSO2024B, they also threw in a nice little "educational board" that has 25 or so outputs on it. Various waveforms, some with glitches and noise on them, plus data interfaces (UART, I2C, CAN, LIN, parallel) with a selectable option for random errors and a few clock signals.
It was a great way to learn the features of my scope. Especially the glitch triggering and noise filtering.
I should design a similar Open Source board with an MCU+DAC.
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