Which of the following describes DMR?

• A. A technique for frequency modulation
• B. A method for time-multiplexing two digital voice signals
• C. A standard for single sideband transmission
• D. A protocol for high data rate transmission

Answer: (B)

DMR, or Digital Mobile Radio, is characterized by its ability to efficiently time-multiplex two digital voice signals onto the same frequency channel. This means that it can handle multiple conversations simultaneously without interference, utilizing time slots to allocate resources dynamically. Each time slot allows a separate voice or data session to transmit, which maximizes the use of the available bandwidth and enables greater communication capacity compared to traditional analog systems.

This capability is a significant advancement in digital communication technology, as it enhances the efficiency and effectiveness of radio spectrum use. The other options, while related to various aspects of communication technology, do not accurately describe DMR. DMR specifically focuses on the digital transmission of voice in a manner that permits concurrent conversations over shared frequencies, which is why this description is correct.