Inside the instrument is a pair of sample-and-hold circuits using fast diodes as RF switches, triggered by very low-rise-time short pulses. Clever tricks abound, such as using the diode pair to ...

Separate search groups with parentheses and Booleans. Note the Boolean sign must be in upper-case. Example: (diode OR solid-state) AND laser [search contains "diode" or "solid-state" and laser] ...