Modulation
PHXII15:COMMUNICATION SYSTEMS

356795 The most commonly employed analog modulation technique in satellite communication is the

1 Amplitude modulation
2 Frequency modulation
3 Phase modulation
4 Amplitude & phase modulation
PHXII15:COMMUNICATION SYSTEMS

356796 In amplitude modulation, sinusoidal carrier frequency used is denoted by \(\omega_{\mathrm{c}}\) and the signal frequency used is denoted by \(\omega_{\mathrm{m}}\). The bandwidth \(\left(\Delta \omega_{\mathrm{m}}\right)\) of the signal is such that \(\Delta \omega_{\mathrm{m}} < < \omega_{\mathrm{c}}\). Which of the following frequencies is not contained in the modulated wave?

1 \(\omega_{\mathrm{c}}\)
2 \(\omega_{\mathrm{m}}+\omega_{\mathrm{c}}\)
3 \(\omega_{\mathrm{m}}\)
4 \(\omega_{\mathrm{c}}-\omega_{\mathrm{m}}\)
PHXII15:COMMUNICATION SYSTEMS

356797 An audio signal \(15 \sin 2 \pi(1500 t)\) amplitude modulates \(60 \sin 2 \pi\left(10^{5}\right) t\). The depth of modulation is

1 \(25 \%\)
2 \(20 \%\)
3 \(50 \%\)
4 \(40 \%\)
PHXII15:COMMUNICATION SYSTEMS

356798 A telephonic communication service is working at carrier frequency of \(10 \mathrm{GHz}\). Only \(10 \%\) of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of \(5 \mathrm{kHz}\) ?

1 \(2 \times 10^{4}\)
2 \(2 \times 10^{5}\)
3 \(2 \times 10^{6}\)
4 \(2 \times 10^{3}\)
PHXII15:COMMUNICATION SYSTEMS

356795 The most commonly employed analog modulation technique in satellite communication is the

1 Amplitude modulation
2 Frequency modulation
3 Phase modulation
4 Amplitude & phase modulation
PHXII15:COMMUNICATION SYSTEMS

356796 In amplitude modulation, sinusoidal carrier frequency used is denoted by \(\omega_{\mathrm{c}}\) and the signal frequency used is denoted by \(\omega_{\mathrm{m}}\). The bandwidth \(\left(\Delta \omega_{\mathrm{m}}\right)\) of the signal is such that \(\Delta \omega_{\mathrm{m}} < < \omega_{\mathrm{c}}\). Which of the following frequencies is not contained in the modulated wave?

1 \(\omega_{\mathrm{c}}\)
2 \(\omega_{\mathrm{m}}+\omega_{\mathrm{c}}\)
3 \(\omega_{\mathrm{m}}\)
4 \(\omega_{\mathrm{c}}-\omega_{\mathrm{m}}\)
PHXII15:COMMUNICATION SYSTEMS

356797 An audio signal \(15 \sin 2 \pi(1500 t)\) amplitude modulates \(60 \sin 2 \pi\left(10^{5}\right) t\). The depth of modulation is

1 \(25 \%\)
2 \(20 \%\)
3 \(50 \%\)
4 \(40 \%\)
PHXII15:COMMUNICATION SYSTEMS

356798 A telephonic communication service is working at carrier frequency of \(10 \mathrm{GHz}\). Only \(10 \%\) of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of \(5 \mathrm{kHz}\) ?

1 \(2 \times 10^{4}\)
2 \(2 \times 10^{5}\)
3 \(2 \times 10^{6}\)
4 \(2 \times 10^{3}\)
PHXII15:COMMUNICATION SYSTEMS

356795 The most commonly employed analog modulation technique in satellite communication is the

1 Amplitude modulation
2 Frequency modulation
3 Phase modulation
4 Amplitude & phase modulation
PHXII15:COMMUNICATION SYSTEMS

356796 In amplitude modulation, sinusoidal carrier frequency used is denoted by \(\omega_{\mathrm{c}}\) and the signal frequency used is denoted by \(\omega_{\mathrm{m}}\). The bandwidth \(\left(\Delta \omega_{\mathrm{m}}\right)\) of the signal is such that \(\Delta \omega_{\mathrm{m}} < < \omega_{\mathrm{c}}\). Which of the following frequencies is not contained in the modulated wave?

1 \(\omega_{\mathrm{c}}\)
2 \(\omega_{\mathrm{m}}+\omega_{\mathrm{c}}\)
3 \(\omega_{\mathrm{m}}\)
4 \(\omega_{\mathrm{c}}-\omega_{\mathrm{m}}\)
PHXII15:COMMUNICATION SYSTEMS

356797 An audio signal \(15 \sin 2 \pi(1500 t)\) amplitude modulates \(60 \sin 2 \pi\left(10^{5}\right) t\). The depth of modulation is

1 \(25 \%\)
2 \(20 \%\)
3 \(50 \%\)
4 \(40 \%\)
PHXII15:COMMUNICATION SYSTEMS

356798 A telephonic communication service is working at carrier frequency of \(10 \mathrm{GHz}\). Only \(10 \%\) of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of \(5 \mathrm{kHz}\) ?

1 \(2 \times 10^{4}\)
2 \(2 \times 10^{5}\)
3 \(2 \times 10^{6}\)
4 \(2 \times 10^{3}\)
PHXII15:COMMUNICATION SYSTEMS

356795 The most commonly employed analog modulation technique in satellite communication is the

1 Amplitude modulation
2 Frequency modulation
3 Phase modulation
4 Amplitude & phase modulation
PHXII15:COMMUNICATION SYSTEMS

356796 In amplitude modulation, sinusoidal carrier frequency used is denoted by \(\omega_{\mathrm{c}}\) and the signal frequency used is denoted by \(\omega_{\mathrm{m}}\). The bandwidth \(\left(\Delta \omega_{\mathrm{m}}\right)\) of the signal is such that \(\Delta \omega_{\mathrm{m}} < < \omega_{\mathrm{c}}\). Which of the following frequencies is not contained in the modulated wave?

1 \(\omega_{\mathrm{c}}\)
2 \(\omega_{\mathrm{m}}+\omega_{\mathrm{c}}\)
3 \(\omega_{\mathrm{m}}\)
4 \(\omega_{\mathrm{c}}-\omega_{\mathrm{m}}\)
PHXII15:COMMUNICATION SYSTEMS

356797 An audio signal \(15 \sin 2 \pi(1500 t)\) amplitude modulates \(60 \sin 2 \pi\left(10^{5}\right) t\). The depth of modulation is

1 \(25 \%\)
2 \(20 \%\)
3 \(50 \%\)
4 \(40 \%\)
PHXII15:COMMUNICATION SYSTEMS

356798 A telephonic communication service is working at carrier frequency of \(10 \mathrm{GHz}\). Only \(10 \%\) of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of \(5 \mathrm{kHz}\) ?

1 \(2 \times 10^{4}\)
2 \(2 \times 10^{5}\)
3 \(2 \times 10^{6}\)
4 \(2 \times 10^{3}\)