I add FFT, Video trigger, and Extended Memory to a very cool TDS 420a Tektronix Oscilloscope. Using work by blogger Tom Verbeure, I connect to the device and enable the options. I also add additional memory to the system board. A fun look at this groovy piece of test equipment history.
Link to the article I used:
[ Ссылка ]
![](https://i.ytimg.com/vi/ttm8kcWTSJ8/maxresdefault.jpg)