Multiplexing is a scheme for transmitting multiple signals at the same time e.g. speeches of ten persons in different rooms on the same channel. How many transmitters will be required in any multiplexing scheme?a)oneb)threec)twod)tenCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

As only one signal is transmitted by the multiplexer, only one transmitter is required.

Answer

The transmitter required is only one.because the signal needed to be transmitted is one.

Answer

Multiplexing Scheme and the Number of Transmitters Required

Multiplexing is a technique used to combine multiple signals and transmit them simultaneously over a shared medium. This allows for efficient utilization of the available bandwidth. In the given scenario, speeches of ten persons in different rooms need to be transmitted on the same channel. Let's analyze how many transmitters will be required in this multiplexing scheme.

Multiplexing Basics
Multiplexing involves combining multiple signals into a single composite signal for transmission. The composite signal is then transmitted over a common medium, such as a cable or wireless channel. At the receiving end, the composite signal is demultiplexed, separating the individual signals for further processing.

Types of Multiplexing
There are different types of multiplexing techniques, including:

1. Frequency Division Multiplexing (FDM): In FDM, the available bandwidth is divided into multiple non-overlapping frequency bands. Each input signal is allocated a specific frequency band for transmission. This allows multiple signals to be transmitted simultaneously without interfering with each other.

2. Time Division Multiplexing (TDM): In TDM, the available time slots in a transmission cycle are divided among the input signals. Each signal is given a dedicated time slot for transmission. The signals are interleaved in time, and at the receiving end, they are demultiplexed based on their respective time slots.

3. Code Division Multiplexing (CDM): CDM utilizes coding techniques to separate multiple signals. Each input signal is assigned a unique code, and these coded signals are overlaid and transmitted simultaneously. At the receiver, the signals are decoded and demultiplexed.

Number of Transmitters Required
In the given scenario, speeches of ten persons in different rooms need to be transmitted on the same channel. To achieve this, a multiplexing scheme needs to be implemented. Since all the speeches need to be transmitted simultaneously, a single transmitter is sufficient.

The multiplexing technique used can be either FDM, TDM, CDM, or any other suitable technique. The specific implementation details will determine the exact configuration of the transmitter. However, regardless of the chosen technique, only one transmitter is required to transmit the composite signal containing all ten speeches.

Therefore, the correct answer is option 'A' - one transmitter.

Conclusion
Multiplexing allows multiple signals to be transmitted simultaneously over a shared medium. In the given scenario, where speeches of ten persons in different rooms need to be transmitted on the same channel, only one transmitter is required in any multiplexing scheme. This transmitter combines the individual speeches into a composite signal, which is then transmitted for further processing and demultiplexing at the receiving end.

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