31 Questions
What is the primary factor that affects signal interpretation in digital signaling?
Signal to noise ratio
What is the function of clocking in digital signaling?
To synchronize the transmitter and receiver
Which encoding scheme uses two different voltages for 0 and 1 bits?
Nonreturn to Zero-Level (NRZ-L)
What is the primary advantage of using a higher signal to noise ratio?
Improved noise immunity
What is the unit of measurement for modulation rate?
baud
What is the primary goal of error detection in digital signaling?
To detect errors in the signal
What is the term for the rate of data transmission in bits per second?
Data rate
What type of encoding scheme is used by IEEE 802.5?
Differential Manchester Encoding
What is the primary goal of modulation rate scrambling?
To replace sequences that produce constant voltage
What is the primary disadvantage of using a high data rate?
Increased error rate
What is a key feature of the B8ZS encoding scheme?
8-zeros substitution
What is the term for the time taken for the transmitter to emit one bit?
Duration of a bit
What type of keying is used for up to 1200bps on voice grade lines?
Frequency Shift Keying
What is the primary advantage of using a high signal to noise ratio?
Improved noise immunity
What is the primary advantage of Frequency Shift Keying over Amplitude Shift Keying?
Less susceptible to error
What is the term for the rate at which the signal level changes?
Modulation rate
What type of signal is used in public telephone systems?
Analog signal
What is the frequency range of analog signals in public telephone systems?
300Hz to 3400Hz
What is the primary goal of encoding techniques in modulation?
To provide error detection capability
What type of PSK is used when the phase of the carrier signal is shifted relative to a previous transmission?
Differential PSK
What is the primary advantage of Multiple FSK over Binary FSK?
More bandwidth efficient
What is a characteristic of Nonreturn to Zero Inverted encoding?
Transition denotes binary 1
What is the advantage of using Bipolar-AMI encoding over Nonreturn to Zero encoding?
No loss of sync with long strings of ones
What is the purpose of the transition in Manchester encoding?
To serve as a clock and data
What is the problem with long runs of zeros in Multilevel Binary encoding?
Loss of sync
What is the advantage of Multilevel Binary encoding over Nonreturn to Zero encoding?
Lower bandwidth
What is the purpose of scrambling data in Multilevel Binary encoding?
To avoid synchronization problems
What is the difference between Pseudoternary and Bipolar-AMI encoding?
Pseudoternary has no advantage or disadvantage over Bipolar-AMI
What is the purpose of inserting additional bits in Multilevel Binary encoding?
To avoid synchronization problems
What is the benefit of using Multilevel Binary encoding?
Each signal element represents more than one bit
What is the disadvantage of using Nonreturn to Zero encoding?
Long runs of zeros can cause synchronization problems
This quiz covers the concepts of Differential Manchester Encoding and Modulation, including clocking transitions, scrambling, and design goals. It's essential for understanding data transmission and encoding schemes. Test your knowledge of these fundamental concepts in computer networks.
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