Baseband Transmission Questions and Answers for Viva

Answer-1: Baseband transmission is a method of sending digital signals over a communication medium without modulation. In baseband transmission, the entire bandwidth of the medium is used to transmit a single signal.

Answer-2: Baseband transmission uses the entire bandwidth of the communication medium to transmit a single signal, whereas broadband transmission divides the available bandwidth into multiple channels, each carrying its own signal.

Answer-3: Advantages of baseband transmission include simplicity of implementation, efficient use of bandwidth for transmitting digital signals, and ease of signal processing.

Answer-4: Disadvantages of baseband transmission include susceptibility to noise and interference, limited transmission distance, and the inability to transmit multiple signals simultaneously without multiplexing.

Answer-5: Binary digital signals (e.g., 0s and 1s), such as those generated by computers and digital devices, are commonly used in baseband transmission.

Answer-6: The key components of a baseband transmission system include a transmitter, a communication medium (e.g., wires, fiber optic cables), and a receiver.

Answer-7: Data is typically encoded using techniques such as Non-Return-to-Zero (NRZ), Manchester encoding, or other modulation schemes to ensure reliable transmission over the communication medium.

Answer-8: Factors affecting data rate in baseband transmission include the bandwidth of the communication medium, the encoding scheme used, and the presence of noise and interference.

Answer-9: Baseband transmission is commonly used in applications such as computer networking, telecommunication systems, and digital audio/video transmission.

Answer-10: Modulation techniques used in baseband transmission include amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM), among others.

Answer-11: Baseband transmission systems employ error detection and correction techniques, as well as signal processing methods, to mitigate the effects of noise and interference.

Answer-12: In baseband transmission, the data rate is limited by the available bandwidth of the communication medium. Higher bandwidth allows for higher data rates.

Answer-13: Pulse shaping helps reduce intersymbol interference by shaping the transmitted pulses to match the response characteristics of the communication medium.

Answer-14: Baseband transmission can employ techniques such as time-division multiplexing (TDM) or frequency-division multiplexing (FDM) to transmit multiple signals simultaneously over the same communication medium.

Answer-15: Manchester encoding is a modulation scheme where each bit period is divided into two equal intervals, and the voltage level of the signal is changed in the middle of each bit period. It is commonly used in baseband transmission for clock recovery and synchronization purposes.

Answer-16: Baseband transmission systems use synchronization techniques such as Manchester encoding, preamble sequences, or synchronization bits to ensure proper alignment of transmitted and received signals.

Answer-17: In NRZ encoding, the signal remains at a constant level for the duration of each bit period, while in RZ encoding, the signal returns to zero between each bit period. RZ encoding helps improve clock recovery and synchronization.

Answer-18: Baseband transmission systems use error detection and correction techniques such as parity checking, cyclic redundancy check (CRC), and forward error correction (FEC) to detect and correct errors in transmitted data.