Which of the following is not an analog-to-analog conversion?
A)
AM
B)
PM
C)
FM
D)
QAM

1 Answer

Answer :

QAM

Related questions

Description : AM and FM are examplesof ________ conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digita

Last Answer : analog-to-analog

Description : ASK, PSK, FSK,and QAM are examples of________conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digital

Last Answer : digital-to-analog

Description : In_____ transmission, thephaseof the carrier signal is modulated to follow the changingvoltage level (amplitude) of the modulating signal. A) AM B) PM C) FM D) none of the above

Last Answer : PM

Description : In_____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude)of the modulating signal. The peak amplitude and phase of the carrier signal remainconstant,but as ... of thecarrier changes correspondingly. A) AM B) PM C) FM D) none of the above

Last Answer : FM

Description : In_____ transmission, thecarrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal. A) AM B) PM C) FM D) none of the above

Last Answer : AM

Description : __________ conversion involves three techniques: line coding,block coding, and scrambling. A) Analog-to-digital B) Digital-to-analog C) Analog-to-analog D) Digital-to-digital

Last Answer : Digital-to-digital

Description : PCM is an example of _______ conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digital

Last Answer : analog-to-digital

Description : Computers cannot communicate with each other directly over telephone lines because they usedigitalpulses whereas telephone lines useanalog sound frequencies. What is the name of the device which permits digital to analog ... A. Interface B. Modem C. Attenuation D. Teleprocessor E. None of the above

Last Answer : Modem

Description : Inan HFC network, the upstream data are modulated using the _______ modulation technique. A) QAM B) QPSK C) PCM D) ASK

Last Answer : QPSK

Description : Inan HFC network, the downstream data are modulated using the _______ modulation technique. A) PSK B) QAM C) PCM D) ASK

Last Answer : QAM

Description : DMT is a modulation technique that combineselements of _______ and _______. A) FDM; TDM B) QDM; QAM C) FDM; QAM D) PSK; FSK

Last Answer : FDM; QAM

Description : The constellation diagram of16-QAM has ______ dots. A) 4 B) 16 C) 8 D) none of the above

Last Answer : 16

Description : _______ uses twocarriers, onein-phase andthe otherquadrature. A) ASK B) PSK C) FSK D) QAM

Last Answer : QAM

Description : Quadrature amplitude modulation(QAM) isa combination of ___________. A) ASK and FSK B) ASK and PSK C) PSK and FSK D) none of the above

Last Answer : ASK and PSK

Description : In________, the phase of thecarrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant. A) ASK B) PSK C) FSK D) QAM

Last Answer : PSK

Description : In_________, the frequencyof the carrier signal is varied to representdata. Both peak amplitudeand phase remain constant. A) ASK B) PSK C) FSK D) QAM

Last Answer : FSK

Description : In________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remainconstant. A) ASK B) PSK C) FSK D) QAM

Last Answer : ASK

Description : If the baudrate fora 64-QAM signal is 2000, what is the bit rate? A) 300 B) 400 C) 1000 D) 12000

Last Answer : 12000

Description : If the bit rate for a16-QAM signal is 4000 bps, what is the baudrate? A) 300 B) 400 C) 1000 D) 1200

Last Answer : 1000

Description : In QAM,both ________ of acarrier frequencyare varied. A) frequencyand amplitude B) phase andfrequency C) amplitudeand phase D) none of the above

Last Answer : amplitudeand phase

Description : Sound in TV is modulating - (1) AM (2) FM (3) PCM (4) PM

Last Answer : (1) AM

Description : Compare between FM and PM 

Last Answer : PARAMETERS FM PM 1. Variable parameter of carrier. Frequency Phase 2. Variable parameter proportional to modulating voltage.  Frequency deviation Phase deviation.  3. Amplitude ... for transmitted power More Moderate 6. Signal to noise ratio Best Better

Description : The Federal Communications Commission (FCC) allows ______ kHz for each FM station. A) 20 B) 100 C) 200 D) none of the above

Last Answer : 100

Description : What frequency range is used for FM radio transmission? A. Very Low Frequency : 3 kHz to 30. kHz B. Low Frequency :30 kHz to 300 kHz C. High Frequency :3 MHz to 30 MHz D. Very High Frequency : 30 MHz to 300 MHz E. None of the above

Last Answer : Very High Frequency : 30 MHz to 300 MHz

Description : A hybrid computer a. Resembles digital computer b. Resembles analog computer c. Resembles both a digital and analog computer d. None of the above

Last Answer : Resembles both a digital and analog computer

Description : A hybrid computer a. Resembles digital computer b. Resembles analog computer c. Resembles both a digital and analog computer d. None of the above

Last Answer : Resembles both a digital and analog computer

Description : In analog computer a. Input is first converted to digital form b. Input is never converted to digital form c. Output is displayed in digital form d. All of above

Last Answer : All of above

Description : A digital computer did not score over an analog computer in terms of a. Speed b. Accuracy c. Cost d. Memory

Last Answer : Accuracy

Description : The computer that process both analog and digital is called a. Analog computer b. Digital computer c. Hybrid computer d. Mainframe computer

Last Answer : Hybrid computer

Description : Analog computer works on the supply of a. Continuous electrical pulses b. Electrical pulses but not continuous c. Magnetic strength d. None of the above

Last Answer : Continuous electrical pulses

Description : An example of digital, rather than analog, communication is a. DDD b. DDS c. WATS d. DDT

Last Answer : DDS

Description : An example of an analog communication method is a. laser beam b. microwave c. voice grade telephone line d. all of the above

Last Answer : all of the above

Description : In a synchronous modem, the digital-to-analog converter transmits signal to the a. equilizer b. modulator c. demodulator d. terminal e. none of aobve

Last Answer : equilizer

Description : The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as: a. modulation b. demodulation c. synchronizing d. digitising

Last Answer : digitising

Description : Telephone companiesprovidetwotypes of analog services: analog _______services andanalog _____services. A) switched; in-band B) out-of-band; in-band C) switched; leased D) leased; out-of-band

Last Answer : switched; leased

Description : The moderntelephone network isnow ________. A) digital B) analog C) digital as well as analog D) none of the above

Last Answer : digital as well as analog

Description : The original telephone network, which is referred to as the plainold telephone system (POTS), was an ________system. A) digital B) analog C) digital as well as analog D) none of the above

Last Answer : analog

Description : Data from a computer are_______; the local loop handles _______ signals. A) analog; analog B) analog; digital C) digital; digital D) digital; analog

Last Answer : digital; analog

Description : _____ isan analog multiplexing technique to combine optical signals. A) FDM B) TDM C) WDM D) None of the above

Last Answer : WDM

Description : FSM isan _________technique. A) analog B) digital C) either (a)or (b) D) none of the above

Last Answer : analog

Description : Which multiplexing technique transmits analog signals? A) FDM B) TDM C) WDM D) (a) and (c)

Last Answer : (a) and (c)

Description : Analog-to-analog conversionis needed if the available bandwidthis _______. A) low-pass B) band-pass C) either (a)or (b) D) neither (a) nor (b)

Last Answer : band-pass

Description : ________conversion is therepresentation ofanalog information by an analog signal. A) Digital-to-analog B) Analog-to-analog C) Analog-to-digital D) Digital-to-digita

Last Answer : Analog-to-analog

Description : _______ conversionis the process of changing one of the characteristics ofan analog signal basedon the informationin the digitaldata. A) Digital-to-analog B) Analog-to-analog C) Analog-to-digital D) Digital-to-digital

Last Answer : Digital-to-analog

Description : The most common technique to change an analog signal to digitaldata is called __________. A) PAL B) PCM C) sampling D) none of the abov

Last Answer : PCM

Description : A(n)_________ signal is a composite analogsignal with an infinite bandwidth. A) digital B) analog C) either (a)or (b) D) neither (a) nor (b

Last Answer : digital

Description : _______ signals canhave only alimited number of values. A) Analog B) Digital C) (a) or (b) D) None of the above

Last Answer : Digital

Description : _____ signals can have an infinite number of values ina range. A) Analog B) Digital C) (a) or (b) D) None of the above

Last Answer : Analog

Description : Signals can be ________. A) analog B) digital C) either (a)or (b) D) neither (a) nor (b)

Last Answer : either (a)or (b)

Description : _______ data have discretestates and take discrete values. A) Analog B) Digital C) (a) or (b) D) None of the above

Last Answer : Digital