Podcast
Questions and Answers
What is the purpose of using multiplexers?
What is the purpose of using multiplexers?
- To restrict information to specific frequency bands
- To separate channels of information into distinct subcarriers
- To eliminate overlapping signals in the frequency spectrum
- To merge multiple channels of information into a common medium (correct)
In the context of multiplexing, what does FDM stand for?
In the context of multiplexing, what does FDM stand for?
- Fast Data Multiplexing
- Fixed Data Modulation
- Frequency Division Multiplexing (correct)
- Frequency Domain Modulation
How does FDM differ from TDM?
How does FDM differ from TDM?
- FDM occurs before the final modulation, while TDM occurs after modulation
- FDM uses frequency sharing, while TDM uses pulse techniques (correct)
- FDM restricts information to specific channels, while TDM allows overlapping signals
- FDM separates information channels into different subcarriers, while TDM shares frequency spectrum
Why is it necessary to let each channel modulate a separate subcarrier?
Why is it necessary to let each channel modulate a separate subcarrier?
What is the scheme for simultaneously transmitting multiple channels of intelligence called?
What is the scheme for simultaneously transmitting multiple channels of intelligence called?
At what stage does multiplexing occur in the transmission process?
At what stage does multiplexing occur in the transmission process?
What is the purpose of individually modulating subcarriers with an information source?
What is the purpose of individually modulating subcarriers with an information source?
What does frequency division multiplexing (FDM) achieve in terms of sharing frequency bands?
What does frequency division multiplexing (FDM) achieve in terms of sharing frequency bands?
In a frequency division multiplexed system, how are the bandwidths of Channel 1 and Channel 2 related?
In a frequency division multiplexed system, how are the bandwidths of Channel 1 and Channel 2 related?
What is the main function of a multiplexer in the transmission process?
What is the main function of a multiplexer in the transmission process?
What does a final modulating wave and a carrier wave produce?
What does a final modulating wave and a carrier wave produce?
What technique is used to allow multiple channels to share the radio frequency spectrum without mutual interference?
What technique is used to allow multiple channels to share the radio frequency spectrum without mutual interference?
What type of signals are contained in each channel in a frequency division multiplexed system?
What type of signals are contained in each channel in a frequency division multiplexed system?
How are multiple multitone channels accommodated in a single VGC?
How are multiple multitone channels accommodated in a single VGC?
What happens in frequency translation in the context of multiplexing?
What happens in frequency translation in the context of multiplexing?
What term is used to describe the modulation process applied to subcarriers in a frequency division multiplexed system?
What term is used to describe the modulation process applied to subcarriers in a frequency division multiplexed system?
What is the primary function of frequency-division multiplexing (FDM)?
What is the primary function of frequency-division multiplexing (FDM)?
Which type of system transmits several channels of voice signals on one carrier in FDM?
Which type of system transmits several channels of voice signals on one carrier in FDM?
What does 'discrete' mean in the context of FDM?
What does 'discrete' mean in the context of FDM?
What frequency range is considered as 'quasistatic' in information rates in FDM?
What frequency range is considered as 'quasistatic' in information rates in FDM?
What is the bandwidth requirement for intelligible speech in a voice grade channel (VGC) in FDM?
What is the bandwidth requirement for intelligible speech in a voice grade channel (VGC) in FDM?
What purpose do guardbands serve in FDM?
What purpose do guardbands serve in FDM?
What is the primary difference between multichannel and multitone systems in FDM?
What is the primary difference between multichannel and multitone systems in FDM?
What type of system is used exclusively to send information in a binary format in FDM?
What type of system is used exclusively to send information in a binary format in FDM?
In FDM, what does each channel modulate?
In FDM, what does each channel modulate?
What is the bandwidth requirement for individual channels within a multitone system in FDM?
What is the bandwidth requirement for individual channels within a multitone system in FDM?
What is the function of subcarriers in an FDM system?
What is the function of subcarriers in an FDM system?
What frequency is Channel 3 assigned in an FDM system with 4 VGCs at intervals of 4 kHz?
What frequency is Channel 3 assigned in an FDM system with 4 VGCs at intervals of 4 kHz?
