Re: open hardware sampler oscilloscope development video by Ted Yapo mentions Tek many times.
It's a pretty interesting design - and ISTR Ted lays no claim to inventingtoggle quoted messageShow quoted text
it. The low cost comes about because it uses only a DAC and a high-speed
comparator in addition to triggering and timing generation.
It uses equivalent timing samping with successive approximation at a point
in time along the signal. So you feed in a voltage to compare to the signal
at a given time after the trigger, and each sample tells you whether you're
high or low.
Do this N times for an N bit sample - hypothetically.