Evaluate Digital vs Analog Transmission - Physics
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Which option typically degrades with each copy due to added noise: analog or digital?
Which option typically degrades with each copy due to added noise: analog or digital?
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Analog. Each copy adds new noise to the signal.
Analog. Each copy adds new noise to the signal.
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What is the main disadvantage of digital transmission related to sampling and quantization?
What is the main disadvantage of digital transmission related to sampling and quantization?
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It introduces quantization error and possible loss of fine detail. Finite sampling cannot capture all analog variations.
It introduces quantization error and possible loss of fine detail. Finite sampling cannot capture all analog variations.
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What is the key advantage of digital transmission related to restoring the signal at repeaters?
What is the key advantage of digital transmission related to restoring the signal at repeaters?
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It can be regenerated to the original bit pattern. Repeaters can perfectly reconstruct 0s and 1s, eliminating accumulated noise.
It can be regenerated to the original bit pattern. Repeaters can perfectly reconstruct 0s and 1s, eliminating accumulated noise.
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Which option is generally easier to encrypt for secure communication: analog or digital?
Which option is generally easier to encrypt for secure communication: analog or digital?
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Digital. Binary data uses established cryptographic algorithms.
Digital. Binary data uses established cryptographic algorithms.
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What is the defining feature of a digital signal in transmission systems?
What is the defining feature of a digital signal in transmission systems?
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A signal represented by discrete levels, typically binary $0$ and $1$. Binary representation allows exact reproduction and noise immunity.
A signal represented by discrete levels, typically binary $0$ and $1$. Binary representation allows exact reproduction and noise immunity.
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What is the defining feature of an analog signal in transmission systems?
What is the defining feature of an analog signal in transmission systems?
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A continuously varying signal with infinitely many possible values. Infinite values between any two points enable smooth representation.
A continuously varying signal with infinitely many possible values. Infinite values between any two points enable smooth representation.
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Which option is more susceptible to noise accumulation over long distances: analog or digital?
Which option is more susceptible to noise accumulation over long distances: analog or digital?
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Analog. Noise adds directly to signal and cannot be separated.
Analog. Noise adds directly to signal and cannot be separated.
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Which option can be regenerated by repeaters to restore signal quality: analog or digital?
Which option can be regenerated by repeaters to restore signal quality: analog or digital?
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Digital. Repeaters detect bits and retransmit clean signals.
Digital. Repeaters detect bits and retransmit clean signals.
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What is the key advantage of digital transmission regarding noise immunity?
What is the key advantage of digital transmission regarding noise immunity?
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Small noise does not change the detected bit if thresholds are met. Binary detection has built-in noise margin.
Small noise does not change the detected bit if thresholds are met. Binary detection has built-in noise margin.
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What is the key disadvantage of analog transmission regarding noise?
What is the key disadvantage of analog transmission regarding noise?
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Noise and distortion add directly to the signal and accumulate. Cannot separate noise from original signal.
Noise and distortion add directly to the signal and accumulate. Cannot separate noise from original signal.
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Which option typically supports error detection and correction more easily: analog or digital?
Which option typically supports error detection and correction more easily: analog or digital?
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Digital. Binary data allows parity bits and checksums.
Digital. Binary data allows parity bits and checksums.
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Which option is generally easier to store, copy, and reproduce without quality loss: analog or digital?
Which option is generally easier to store, copy, and reproduce without quality loss: analog or digital?
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Digital. Perfect bit copies maintain original quality.
Digital. Perfect bit copies maintain original quality.
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Which option usually requires analog-to-digital conversion for real-world sources: analog or digital?
Which option usually requires analog-to-digital conversion for real-world sources: analog or digital?
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Digital. Most sensors produce analog voltages initially.
Digital. Most sensors produce analog voltages initially.
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Which option typically requires more complex hardware for encoding/decoding: analog or digital?
Which option typically requires more complex hardware for encoding/decoding: analog or digital?
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Digital. ADCs, DACs, and processing circuits add complexity.
Digital. ADCs, DACs, and processing circuits add complexity.
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Which option is typically simpler for direct transmission of a microphone voltage: analog or digital?
Which option is typically simpler for direct transmission of a microphone voltage: analog or digital?
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Analog. Direct wire connection without conversion circuitry.
Analog. Direct wire connection without conversion circuitry.
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Identify the better choice for long-distance telecommunication links when noise is significant.
Identify the better choice for long-distance telecommunication links when noise is significant.
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Digital transmission. Regeneration prevents noise accumulation over distance.
Digital transmission. Regeneration prevents noise accumulation over distance.
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Identify the better choice when exact waveform shape must be preserved with no quantization.
Identify the better choice when exact waveform shape must be preserved with no quantization.
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Analog transmission. No sampling means no quantization artifacts.
Analog transmission. No sampling means no quantization artifacts.
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Which option usually enables more efficient multiplexing with many channels: analog or digital?
Which option usually enables more efficient multiplexing with many channels: analog or digital?
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Digital. Time-division multiplexing efficiently shares bandwidth.
Digital. Time-division multiplexing efficiently shares bandwidth.
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What is the term for a digital system restoring bits to ideal levels at intermediate stations?
What is the term for a digital system restoring bits to ideal levels at intermediate stations?
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Regeneration (using digital repeaters). Restores degraded signals to original bit values.
Regeneration (using digital repeaters). Restores degraded signals to original bit values.
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Identify the main advantage of analog transmission for very low-latency simple links.
Identify the main advantage of analog transmission for very low-latency simple links.
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It can avoid conversion and processing delays from digitization. No ADC/DAC conversion time required.
It can avoid conversion and processing delays from digitization. No ADC/DAC conversion time required.
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Which option is more likely to show a gradual quality decrease rather than abrupt failure: analog or digital?
Which option is more likely to show a gradual quality decrease rather than abrupt failure: analog or digital?
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Analog. Degrades smoothly vs digital's cliff effect.
Analog. Degrades smoothly vs digital's cliff effect.
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Which transmission type typically degrades gradually as noise increases rather than failing suddenly?
Which transmission type typically degrades gradually as noise increases rather than failing suddenly?
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Analog transmission. Continuous signals degrade smoothly, while digital fails abruptly at threshold.
Analog transmission. Continuous signals degrade smoothly, while digital fails abruptly at threshold.
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Which option best describes the digital failure mode when noise pushes values past decision thresholds?
Which option best describes the digital failure mode when noise pushes values past decision thresholds?
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Bit errors occur once noise causes wrong level decisions. Noise flips bits when it pushes signal beyond decision boundary.
Bit errors occur once noise causes wrong level decisions. Noise flips bits when it pushes signal beyond decision boundary.
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Which transmission type is more compatible with compression methods to reduce data rate?
Which transmission type is more compatible with compression methods to reduce data rate?
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Digital transmission. Digital data can use algorithms to reduce redundancy efficiently.
Digital transmission. Digital data can use algorithms to reduce redundancy efficiently.
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Which option is a digital advantage for long-distance links compared with analog amplification?
Which option is a digital advantage for long-distance links compared with analog amplification?
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Repeaters regenerate bits instead of amplifying noise. Digital repeaters recreate clean bits; analog amplifiers boost noise too.
Repeaters regenerate bits instead of amplifying noise. Digital repeaters recreate clean bits; analog amplifiers boost noise too.
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Identify the analog advantage for very low-latency transmission of a simple sensor waveform.
Identify the analog advantage for very low-latency transmission of a simple sensor waveform.
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No sampling/encoding step, so processing delay can be lower. Direct transmission avoids ADC/DAC conversion delays.
No sampling/encoding step, so processing delay can be lower. Direct transmission avoids ADC/DAC conversion delays.
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Which option is a typical digital disadvantage when the bit rate is high?
Which option is a typical digital disadvantage when the bit rate is high?
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It may require more bandwidth than an equivalent analog signal. Each bit needs transmission time, potentially exceeding analog bandwidth.
It may require more bandwidth than an equivalent analog signal. Each bit needs transmission time, potentially exceeding analog bandwidth.
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Which option is a common digital disadvantage caused by representing a continuous signal with steps?
Which option is a common digital disadvantage caused by representing a continuous signal with steps?
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Quantization error (quantization noise). Rounding continuous values to discrete levels introduces error.
Quantization error (quantization noise). Rounding continuous values to discrete levels introduces error.
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What term describes the digital advantage of sending multiple signals over one channel efficiently?
What term describes the digital advantage of sending multiple signals over one channel efficiently?
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Multiplexing (especially time-division multiplexing). TDM assigns time slots to different digital streams on one channel.
Multiplexing (especially time-division multiplexing). TDM assigns time slots to different digital streams on one channel.
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Which transmission type can represent a continuously varying quantity without sampling or quantization?
Which transmission type can represent a continuously varying quantity without sampling or quantization?
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Analog transmission. No discrete steps means infinite resolution of the original signal.
Analog transmission. No discrete steps means infinite resolution of the original signal.
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