Which of the following audio types has the highest bit resolution and sampling rate? A.FM boardcast B.DVD C.Voice over telephone D.Compact disc
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- Choose the correct answer low HDOP (Horizontal Dilution of Precision) number such as2 indicates a ........................... a.poor fix b.good fix c.poor signal quality d. good signal quality2/ Information in an analog waveform, whose maximum frequency is 10 kHz, will be transmitted using a minimum sampling rate and a 32-PAM system. transmitted using a minimum sampling frequency and a 32-PAM system. The quantization distortion shall not exceed 0.01% of the The quantization distortion must not exceed 0.01% of the peak-to-peak value of the analog signal. a/ What is the minimum PCM word size to be used in the system? b/ What is the baud rate?For a FM system, the maximum freq deviation is 75 kHz and the maximum freq of the info. signal is 10 kHz. What will be the total bandwidth of the FM system? What will be the modulation index?
- b. Explain how to decide the sampling rate for a multi-frequency input signal. c. An ADC with word length of 24 bits. If the input analogue signal range is 3.7 V, what is the resolution of this ADC? d. Consider a thermocouple giving an output of 0.5 mVrc. What will be the word length required when its output passes through an ADC if temperatures from 0°C to 120°C are to be measured with resolution of 1.5°C?. Assume 12V as system voltage.1. What are the two ways of generating DSB_SC.2. What are the applications of balanced modulator?3. What are the advantages of suppressing the carrier?4. What are the advantages of balanced modulator?5. What are the advantages of Ring modulator?6. Write the expression for the output voltage of a balanced modulator?Explain by block diagram and equations the PLL method of Demodulating FM
- C D .accepts this data and redistributes it to the n outputs. encoder De-multiplexer are faster in speed because the delay between the input and. * *.accepts this data and redistributes it to the n outputs. Decoder O output is due to the propagation delay of gate combinational circuit O Sequential network O Integrated circuit O Decoder O encoder O De-multiplexerThe information in an analog waveform, whose maximum frequency fm-4000Hz, is to be transmitted using a 16-level PAM system. The quantization must not exceed #1% of the peak-to peak analog signal. (a) What is the minimum number of bits per sample or bits per PCM word that should be used in this system? (b) What is the minimum required sampling rate, and what is the resulting bit rate? (c) What is the 16-ary PAM symbol Transmission rate?Describe the differences between, (i) Analog and digital communication systems (ii) Digital modulation and digital transmission.
- Q3) Twenty voice signals are sampled uniformly and then time division multiplexed. The sampling operation uses flat samples with 2 us duration. The multiplexing operation provides for synchronization by adding an extra pulse of 2 us. the highest frequency component of each signal is 3.4 kHz. a. For sampling rate of 8 kHz, calculate spacing between successive pulses of multiplexed signal. b. For Nyquist rate, repeat part a.A) Explain briefly the process of voltage control oscillator (VCO) for FM generation B) Why VSB modulation is used in TV picture transmission? C) Draw the block diagram of balanced modulator for AMDSB-SC generation.The following figures show part of an analogue signal being digitised, at two different sampling rates. Make your explanation brief. (1) Explain how the difference in the sampling rates in figure 1 and figure 2 will affect the file sizes after digitisation. (ii) Which of the two sampling rates would you consider to be the least efficient to reproduce the original analogue signal accurately? (iii) What is the preferred digital sample rate (frequency) of an analogue audio signal that would be needed to accurately reproduce the original signal? Figure 1 Figure 2 15 14 13 12 11 10 6. 8 7 6 15 14 13 12 11 10 4 (iv) Draw the digital signals corresponding to the analogue signals is Figure 1 and Figure 2.