USAF Electrical Power Production (AFSC 3E0X2) On-Site Power Module 2 Practice Test

ECUs are digital processors, so they read data as discrete numbers rather than continuous signals. Most sensors in on-site power equipment deliver an analog signal—a voltage or current that varies smoothly with a physical parameter. To interpret that measurement, the analog signal must be converted into digital data, typically by an analog-to-digital converter. The ECU then processes that digital value, performing calculations, comparisons, and control logic. While the digital data are ultimately represented in binary inside the processor, the essential form the ECU requires is digital data. An analog signal cannot be interpreted directly by the ECU, and terms like code aren’t the standard input form for this purpose.