What is the Digital Quality Index (DQI) based on?

The Digital Quality Index (DQI) is a comprehensive measurement that evaluates the overall quality of a digital signal. By incorporating multiple factors, such as quality level, Modulation Error Ratio (MER), and Bit Error Rate (BER), the DQI provides a more accurate representation of signal integrity than any single metric could.

Quality level assesses the general signal quality, indicating how well the signal adheres to expected standards. MER is a critical parameter in digital communications that measures the ratio of the desired signal to the noise and interference, influencing how well the data can be recovered. BER quantifies how many bits of the signal are received incorrectly, serving as a clear measurement of the system's performance in terms of data integrity.

This multi-faceted approach gives the DQI its strength, enabling technicians to diagnose issues, maintain optimal signal quality, and ensure a better overall experience for the end user. The focus on just one of these elements, such as speed or signal strength alone, does not capture the complete picture of digital transmission quality. Therefore, the correct answer reflects the DQI's reliance on a combination of these three critical factors.