[Herp] just shared a nice 1MHz Arbitrary Waveform Generator (right click -> translate ... with its touchscreen and the 75MHz AD9834 Direct Digital Synthesizer (DDS). Of course the latter could ...
[Enzo] is controlling this chip with a PIC16 microcontroller, with a whole bunch of analog circuitry between the digital domain and the BNC connector on the front panel. The waveform generator is ...