Podcast
Questions and Answers
What is the primary purpose of modulation in communication systems?
What is the primary purpose of modulation in communication systems?
- To increase the power of the signal
- To reduce the bandwidth requirement
- To move the message signal into a specific frequency band (correct)
- To decrease the complexity of the transmission
Which type of communication systems utilize digital modulation?
Which type of communication systems utilize digital modulation?
- NTSC television signals
- Second and third generation cellular phone systems (correct)
- HDTV signals
- AM/FM radios
What is the frequency band of the baseband for a telephony system?
What is the frequency band of the baseband for a telephony system?
- 0 - 5 kHz
- 0 - 10 kHz
- 0 - 3 kHz (correct)
- 0 - 1 kHz
Which type of communication systems does not use modulation?
Which type of communication systems does not use modulation?
What are the advantages of modulation in communication systems?
What are the advantages of modulation in communication systems?
What type of modulation results in amplitude modulation (AM)?
What type of modulation results in amplitude modulation (AM)?
In baseband communication, why are dedicated user channels assigned to each user for long-distance communications?
In baseband communication, why are dedicated user channels assigned to each user for long-distance communications?
What is the main reason baseband signals cannot be effectively transmitted over radio (wireless) links?
What is the main reason baseband signals cannot be effectively transmitted over radio (wireless) links?
Which type of modulation allows utilization of one channel by signals through modulation and shifting of spectra to nonoverlapping bands?
Which type of modulation allows utilization of one channel by signals through modulation and shifting of spectra to nonoverlapping bands?
What happens when a sinusoidal signal is modulated by changing the amplitude proportionally to the message signal?
What happens when a sinusoidal signal is modulated by changing the amplitude proportionally to the message signal?
What type of modulation results in amplitude modulation (AM)?
What type of modulation results in amplitude modulation (AM)?
In baseband communication, why are dedicated user channels assigned to each user for long-distance communications?
In baseband communication, why are dedicated user channels assigned to each user for long-distance communications?
What is the primary purpose of modulation in communication systems?
What is the primary purpose of modulation in communication systems?
What happens when a sinusoidal signal is modulated by changing the amplitude proportionally to the message signal?
What happens when a sinusoidal signal is modulated by changing the amplitude proportionally to the message signal?
Which type of communication systems does not use modulation?
Which type of communication systems does not use modulation?
What is the primary advantage of modulation in communication systems?
What is the primary advantage of modulation in communication systems?
In which frequency band does baseband communication operate?
In which frequency band does baseband communication operate?
What distinguishes carrier communications from baseband communications?
What distinguishes carrier communications from baseband communications?
Which type of communication systems utilize classic analog modulations such as amplitude modulation?
Which type of communication systems utilize classic analog modulations such as amplitude modulation?
What is the function of angle modulation in communication systems?
What is the function of angle modulation in communication systems?
