321A

Oscilloscopes are electronic test instruments that display signal voltage as a trace over time. Oscilloscopes are used to observe waveform shape, timing behavior, amplitude relationships, and transient events in electronic circuits. Oscilloscopes are bench or portable diagnostic instruments rather than production process tools in semiconductor fabrication flow.

The Tektronix 321A uses a cathode-ray tube display and a vertical deflection system with bandpass from dc to at least 6 mc at the 3-db point using dc coupling. The Tektronix 321A provides sensitivity from 0.01 v/div to 20 v/div in 11 calibrated steps, with stated accuracy within 3% of front-panel markings. The Tektronix 321A provides automatic triggering or amplitude-level selection using preset stability. The Tektronix 321A can trigger from internal vertical signal or from an external triggering signal. The Tektronix 321A can operate from an internally contained rechargeable battery pack, an external dc source, or a 115/230-volt 50-800 cycle ac line. The Tektronix 321A includes a front-panel battery light that indicates low internal batteries or insufficient external supply voltage for proper regulation.^[1]

Oscilloscopes sit in electrical debug, maintenance, development, and equipment-service activity around semiconductor and electronics operations rather than in the direct wafer processing path. Oscilloscopes are commonly used beside power supplies, signal generators, controllers, sensors, and drive electronics when engineers need to inspect live analog or pulse waveforms. Oscilloscopes therefore fit around tool support electronics, test setups, and laboratory benches rather than between fabrication process modules.