A phone _______ converts digital data into an analog signal so that it can be transferred over a telephone line
A phone _______ converts digital data into an analog signal so that it can be transferred over a telephone line _______ .
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A phone _______ converts digital data into an analog signal so that it can be transferred over a telephone line
12. The analog telephone line has maximum frequency 4 KHz. Analog telephone signal converted to digital....
12. The analog telephone line has maximum frequency 4 KHz. Analog telephone signal converted to digital. Which sampling frequency (sampling rate ) Analog - to- Digital (AD) converter must have ? At least KHz 13. Which of the following computer architecture is "IBM-compatible PC“? a) x86-64 b) Apple c) ARMv7 d) ARMv8 14. Ir Computer manual describes CPU as: "Intel Core i7, 3.4 GHz". then 3.4 GHz is a) CPU Clock frequency b) Memory bus frequency e) Frequency of the...
You are given an analog-to-digital converter (ADC) which is used to convert an input analog signal...
You are given an analog-to-digital converter (ADC) which is used to convert an input analog signal to a digital signal. The highest frequency present in the input analog signal is 20 Hz. The ADC samples the input analog signal at 1.25 times the minimum required sampling rate. (Note; this ADC “over-samples” the analog input signal; the sampling rate of this ADC is higher than the minimum required sampling rate. The ADC samples at 1.25 times the minimum required sampling rate)....
Assume that an analog audio voice-frequency (VF) telephone signal m(t) occupies a band from 300 Hz...
Assume that an analog audio voice-frequency (VF) telephone signal m(t) occupies a band from 300 Hz to 3000 Hz. The signal is to be converted to a PCM signal for transmission over a digital telephone system. The signal is sampled at a rate 33.3% higher than the Nyquist rate. The maximum acceptable quantizatiorn error is 2% of the peak amplitude of m(t). The quantized samples are binary coded. Find the minimum bandwidth B of a noiseless channel required to transmit...
4. [10 marks] The standard spectrum of a regular telephone line that is used, via modems, to transmit digital data is 3...
4. [10 marks] The standard spectrum of a regular telephone line that is used, via modems, to transmit digital data is 300 to 3400 Hz. The signal-to-noise ratio is 40 dB. What is the capacity of the channel? If we assume that just 85% of the theoretical limit can be reached, derive from the Nyquist formula, the number of signal levels required?
4. [10 marks] The standard spectrum of a regular telephone line that is used, via modems, to transmit...
1) ADSL is a digital access technique that requires analog telephone calls to be converted to...
1) ADSL is a digital access technique that requires analog telephone calls to be converted to digital signals using PCM. True False 2) Select the correct statement(s) regarding ADSL. a. DMT uses OFDM, which minimizes the impact of noise/interference b. M’ary QAM techniques are used to adjust bit rates c. analog telephone traffic is supported without the need to digitize voice traffic d. all are correct statements 3) What is typically a concern for a service provider when attempting to...
10. Answer the following questions: 10.1 What characteristic of the carrier wave is changed to represent...
10. Answer the following questions: 10.1 What characteristic of the carrier wave is changed to represent the data in ASK? a. amplitude b. frequency c. phase d. period 10.2 What kind of keying or modulation changes both the amplitude and phase of a carrier wave to represent data? a. FM 6. FSK c. PSK d. QAM 10.3 PSK is keying, not analog modulation. a. true b. false 11. Match. Data is the original information and signal is the information as...
Problem 2: An analog signal is to be converted into a PCM signal that is a binary polar NRZ line ...
Problem 2: An analog signal is to be converted into a PCM signal that is a binary polar NRZ line code. The signal is transmitted over a channel that is absolutely bandlimited to B-8 kHz. Assume that the PCM quantizer has 32 steps and that the overall equivalent system transfer function He is of the raised cosine-rolloff type with r 0.5. Find the maximum symbol rate D that can be supported over this channel without causing ISI a) c) Find...
What are data? what are signals? What is the relationship between data and signals? Data can...
What are data? what are signals? What is the relationship between data and signals? Data can be analog or digital. Analog data refers to continuous. Digital data are discrete. Signal can be either analog and digital. An analog signal has infinitely many levels of intensity over a period of time. A digital signal can have only a limited number of defined values, often as 0 and 1. Please understand these basic concepts and share your understanding. This is from Computer...
ssessment,id=215 Converts a physical variable into an electrical signa O converts an analog signal into o...
ssessment,id=215 Converts a physical variable into an electrical signa O converts an analog signal into o digitol signal O Converts a digitol signol into an anolog signal QUESTION 4 The basic approach to testing D/A converters is to Ο App ya sequence of binary codes coveringthe full rangeofi put vakes to the creati put vhle ooserv ngt eat stonin o O Single-step the device through its full input range while checking the output with a DMM sepe The Check the...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
12. The analog telephone line has maximum frequency 4 KHz. Analog telephone signal converted to digital. Which sampling frequency (sampling rate ) Analog - to- Digital (AD) converter must have ? At least KHz 13. Which of the following computer architecture is "IBM-compatible PC“? a) x86-64 b) Apple c) ARMv7 d) ARMv8 14. Ir Computer manual describes CPU as: "Intel Core i7, 3.4 GHz". then 3.4 GHz is a) CPU Clock frequency b) Memory bus frequency e) Frequency of the...
You are given an analog-to-digital converter (ADC) which is used to convert an input analog signal to a digital signal. The highest frequency present in the input analog signal is 20 Hz. The ADC samples the input analog signal at 1.25 times the minimum required sampling rate. (Note; this ADC “over-samples” the analog input signal; the sampling rate of this ADC is higher than the minimum required sampling rate. The ADC samples at 1.25 times the minimum required sampling rate)....
Assume that an analog audio voice-frequency (VF) telephone signal m(t) occupies a band from 300 Hz to 3000 Hz. The signal is to be converted to a PCM signal for transmission over a digital telephone system. The signal is sampled at a rate 33.3% higher than the Nyquist rate. The maximum acceptable quantizatiorn error is 2% of the peak amplitude of m(t). The quantized samples are binary coded. Find the minimum bandwidth B of a noiseless channel required to transmit...
4. [10 marks] The standard spectrum of a regular telephone line that is used, via modems, to transmit digital data is 300 to 3400 Hz. The signal-to-noise ratio is 40 dB. What is the capacity of the channel? If we assume that just 85% of the theoretical limit can be reached, derive from the Nyquist formula, the number of signal levels required?
4. [10 marks] The standard spectrum of a regular telephone line that is used, via modems, to transmit...
10. Answer the following questions: 10.1 What characteristic of the carrier wave is changed to represent the data in ASK? a. amplitude b. frequency c. phase d. period 10.2 What kind of keying or modulation changes both the amplitude and phase of a carrier wave to represent data? a. FM 6. FSK c. PSK d. QAM 10.3 PSK is keying, not analog modulation. a. true b. false 11. Match. Data is the original information and signal is the information as...
Problem 2: An analog signal is to be converted into a PCM signal that is a binary polar NRZ line code. The signal is transmitted over a channel that is absolutely bandlimited to B-8 kHz. Assume that the PCM quantizer has 32 steps and that the overall equivalent system transfer function He is of the raised cosine-rolloff type with r 0.5. Find the maximum symbol rate D that can be supported over this channel without causing ISI a) c) Find...
ssessment,id=215 Converts a physical variable into an electrical signa O converts an analog signal into o digitol signal O Converts a digitol signol into an anolog signal QUESTION 4 The basic approach to testing D/A converters is to Ο App ya sequence of binary codes coveringthe full rangeofi put vakes to the creati put vhle ooserv ngt eat stonin o O Single-step the device through its full input range while checking the output with a DMM sepe The Check the...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
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