In a system with a digital scan converter but an analog input signal, which component is required to convert the signal to digital form?

In a system with a digital scan converter but an analog input signal, which component is required to convert the signal to digital form?

• A. Hybrid multiplexer
• B. Modem
• C. Analog to digital converter
• D. Digital monitor

Answer: (C)

A digital scan converter can only process digital data, so a continuous analog signal must be turned into a digital form before processing. This is done by an analog-to-digital converter, which samples the incoming analog signal at regular intervals (the sampling rate) and assigns each sample to a finite set of levels (the bit depth). The result is a stream of binary values that the digital scan converter can store, process, and display. If the signal remained analog, the digital components wouldn’t be able to interpret it correctly, leading to improper image data. The other devices don’t perform digitization: a hybrid multiplexer combines signals, a modem handles digital-analog communication, and a digital monitor displays already digital data.

A digital scan converter can only process digital data, so a continuous analog signal must be turned into a digital form before processing. This is done by an analog-to-digital converter, which samples the incoming analog signal at regular intervals (the sampling rate) and assigns each sample to a finite set of levels (the bit depth). The result is a stream of binary values that the digital scan converter can store, process, and display. If the signal remained analog, the digital components wouldn’t be able to interpret it correctly, leading to improper image data. The other devices don’t perform digitization: a hybrid multiplexer combines signals, a modem handles digital-analog communication, and a digital monitor displays already digital data.