A signal showing the voltage of a battery displayed on a dig…

A signal showing the voltage of a battery displayed on a digital storage oscilloscope (DSO) is being discussed. Technician A says that the display will show one horizontal line above the zero line. Technician B says that the display will show a line sloping upward from zero to the battery voltage level. Which technician is correct?

Two technicians are discussing pulse train signals. Technici…

Two technicians are discussing pulse train signals. Technician A says a pulse train is a DC signal waveform that goes above and below zero volts. Technician B says that a pulse train is a DC voltage that turns on and off in a series of pulses and they do not go below zero. Which technician is correct? (Text page 69)