| As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the input system block "ANALOG A/D" represent? |
| A) It receives digital outputs from the binary device sensors and converts these to analog signals for CPU processing. |
| B) It receives analog outputs from the sensors and converts these to digital signals for CPU processing. |
| C) It receives digital outputs from the binary device sensors and conditions these as digital signals for CPU processing. |
| D) It receives analog outputs from the sensors and conditions these as analog signals for CPU processing. |
