Paul E. Stuckert

Computer Augmented Oscilloscope System

The Computer Augmented Oscilloscope System (CAOS) is a laboratory-computer terminal intended for experiments involving waveforms and their interpretation. The terminal is portable and can be used wherever telephone access to a suitably programmed computer is available. The CAOS laboratory equipment includes a sampling oscilloscope with a storage CRT, the terminal proper, and a telephone line connection. The terminal includes alphameric and function keyboards, A/D and D/A converters, a read-only store character generator, sequencing and control logic, and circuits for interfacing to the oscilloscope and the telephone line. CAOS is an interface between the experimenter, the experiment, and the computer. It provides digital acquisition of waveform data, system calibration, data analysis, experiment control, and graphic and alphameric display. CAOS can emulate a number of laboratory instruments and can operate additional X-Y storage oscilloscopes.

Active DC directional couplers

Active d.c. directional couplers which are combinations of conventional transmission line attenuator networks and d.c. amplifiers are described. The circuits of and design equations for signal-detecting and signal-injecting directional couplers with responses which are inherently flat from d.c. to an amplifier-dependent upper frequency limit are presented.

The IEEE/IEC pulse standards — Basic tools for waveform analysis

Describes the organization and content of the new IEEE pulse standards and presents material that illustrates their use. These standards (and their International Electrotechnical Commission counterparts) complement instruments that digitize, store, and analyze waveforms. Together, the standards and these relatively new instruments provide means for automated pulse waveform analysis.