Which term describes sending multiple signals over a single channel by varying frequency?

Which term describes sending multiple signals over a single channel by varying frequency?

• A. Polling
• B. Tone-frequency multiplexing
• C. Scanning
• D. Multiplexing

Answer: (B)

Sending multiple signals over a single channel by using different frequencies to carry each signal is a frequency-based sharing method. The term that describes this precisely is tone-frequency multiplexing. In this approach, each signal is carried on its own distinct frequency or tone, the signals are combined for transmission, and at the receiving end, filters and demodulators pull out each tone to recover the original signals. This is different from polling or scanning, which describe how devices are accessed rather than how channels carry multiple signals, and it’s more specific than the general term multiplexing, which can also refer to time-division methods.

Sending multiple signals over a single channel by using different frequencies to carry each signal is a frequency-based sharing method. The term that describes this precisely is tone-frequency multiplexing. In this approach, each signal is carried on its own distinct frequency or tone, the signals are combined for transmission, and at the receiving end, filters and demodulators pull out each tone to recover the original signals. This is different from polling or scanning, which describe how devices are accessed rather than how channels carry multiple signals, and it’s more specific than the general term multiplexing, which can also refer to time-division methods.