Which of the following statements are true?
A. Frequency division multiplexing technique can be handled by digital circuits.
B. Time division multiplexing technique can be handled by analog circuits.
C. Wavelength division multiplexing technique is used with optical fiber for combining two signals.
D. Frequency division multiplexing technique can be applied when the bandwidth of a link is greater than the bandwidth of the signals to be transmitted.
Choose the correct answer from the options given below:

Correct option is B

Statement A: "Frequency division multiplexing (FDM) technique can be handled by digital circuits."
False. FDM is typically implemented in analog systems, as it divides the available frequency spectrum into separate channels. Digital circuits are not inherently used for this.
Statement B: "Time division multiplexing (TDM) technique can be handled by analog circuits."
False. TDM is primarily used in digital systems. It involves time-sharing among multiple signals and requires digital time slots.
Statement C: "Wavelength division multiplexing (WDM) technique is used with optical fiber for combining two signals."
True. WDM is a widely used technique in optical communications, where multiple signals are transmitted simultaneously over a single optical fiber using different wavelengths.
Statement D: "Frequency division multiplexing technique can be applied when the bandwidth of a link is greater than the bandwidth of the signals to be transmitted."
True. FDM requires a bandwidth that exceeds the combined bandwidth of all the signals to accommodate them without overlap.
Information Booster
1. Frequency Division Multiplexing (FDM):
· Uses different frequency bands for multiple signals.
· Commonly implemented in analog systems, such as radio broadcasting.
2. Time Division Multiplexing (TDM):
· Assigns time slots to each signal for transmission.
· Used in digital systems like telecommunication networks.
3. Wavelength Division Multiplexing (WDM): Combines multiple optical signals with different wavelengths for transmission over a single fiber.
4. Applications of FDM and WDM:
· FDM: Radio and TV transmission.
· WDM: High-speed optical fiber networks.
Additional Knowledge
· Digital circuits cannot handle FDM (eliminates A).
· Analog circuits are unsuitable for TDM (eliminates B).
· WDM is exclusive to optical communications, unlike TDM or FDM.
· FDM requires bandwidth allocation greater than the combined signal bandwidth, ensuring no overlap.