Delta Modulation vs PCM

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What is a major advantage of Delta Modulation compared to Pulse Code Modulation?

Higher transmission rate

Better Signal-to-Noise Ratio

Simpler operation (correct)

Increased bandwidth efficiency

What is a major disadvantage of Delta Modulation compared to Pulse Code Modulation?

Lower transmission rate

Increased bandwidth usage

Complex operation

Worse Signal-to-Noise Ratio (correct)

What is a common issue associated with Delta Modulation?

Complex decoder design

Low transmission rate

High bandwidth usage (correct)

Poor signal quality

How does Delta Modulation compare to Pulse Code Modulation in terms of complexity?

Delta Modulation is less complex Signup and view all the answers

What is the main difference between Delta Modulation and Pulse Code Modulation in terms of signal quality?

Delta Modulation has a worse Signal-to-Noise Ratio Signup and view all the answers

What is the primary difference between QPSK and OQPSK modulators?

The delay in the Q stream Signup and view all the answers

What is the advantage of multilevel PSK modulation?

Improved error rate performance Signup and view all the answers

What is the relationship between the bit rate and the bandwidth for ASK and PSK modulation?

The bit rate is directly proportional to the bandwidth Signup and view all the answers

What is the purpose of a codec in analog-to-digital conversion?

To convert the analog signal to digital data Signup and view all the answers

What is the principle behind pulse code modulation (PCM)?

Sampling the analog signal at regular intervals Signup and view all the answers

What is the main purpose of the Differential Manchester Encoding scheme?

To provide a self-clocking mechanism Signup and view all the answers

What is the maximum modulation rate of the Biphase Pros scheme?

Twice the NRZ modulation rate Signup and view all the answers

What is the main advantage of using Scrambling in modulation schemes?

To prevent a constant voltage level Signup and view all the answers

What is the main difference between Amplitude Shift Keying (ASK) and Frequency Shift Keying (FSK)?

ASK uses two amplitudes, while FSK uses two frequencies Signup and view all the answers

What is the main advantage of Quadrature PSK over Binary PSK?

It is more bandwidth-efficient Signup and view all the answers

What is the name of the encoding technique that represents data as the presence or absence of signal transitions?

NRZ Signup and view all the answers

Which encoding technique is used in magnetic recording?

NRZ Signup and view all the answers

What is the main advantage of Manchester Encoding?

Synchronization and clock recovery Signup and view all the answers

Which encoding technique uses three levels: +A, -A, and 0?

Multilevel Binary Signup and view all the answers

What is a major disadvantage of Multilevel Binary encoding?

Sensitive to noise and interference Signup and view all the answers

What is the minimum number of levels required for good voice reproduction with PCM?

128 levels Signup and view all the answers

What is the required bandwidth for voice signals?

4 kHz Signup and view all the answers

What is the data rate required for PCM with 7-bit quantization and 4 kHz bandwidth?

56 kbps Signup and view all the answers

Why do we modulate analog signals?

To transmit multiple signals over a single channel Signup and view all the answers

What is the benefit of using data compression?

To reduce data size and improve transmission efficiency Signup and view all the answers

What is the advantage of using a higher frequency in transmission?

It permits frequency division multiplexing Signup and view all the answers

What type of modulation changes the frequency of the carrier signal?

Frequency Modulation Signup and view all the answers

Which of the following is not a type of analog modulation?

Digital Modulation Signup and view all the answers

What is the result of using a higher frequency in transmission, in terms of multiplexing?

Frequency Division Multiplexing Signup and view all the answers

What is the term for the process of modifying a carrier signal to encode information?

Modulation Signup and view all the answers

What is necessary for the receiver to know in order to interpret the signal?

Signal levels and timing of bits Signup and view all the answers

What is the purpose of knowing the signal to noise ratio?

To improve signal quality Signup and view all the answers

What is affected by the rate bandwidth and encoding scheme?

Data rate and signal to noise ratio Signup and view all the answers

In Nonreturn to Zero-Level (NRZ-L) encoding, what happens during the bit interval?

Voltage is constant during the bit interval Signup and view all the answers