WorksheetsAnalogueCommunicationLabExam
Total questions: 10
Worksheet time: 5mins
Continuous stream of varying position
PAM
PCM
PPM
PWM
In PWM
Width of the pulse is constant
Position of the pulse is constant
Amplitude of the pulse varies
None of the above
A low pass filter
Accepts high frequencies
Rejects low fequencies
Accepts an intermediate range of frequencies
Rejects high frequencies
Which of the following is not a pulse modulation scheme?
Pulse amplitude modulation
Pulse frequency modulation
Pulse width modulation
Pulse position modulation
PAM signal can be detected using
Low pass filter
High pass filter
Band pass filter
Band reject filter
De-emphasis circuit is used
After demodulation
Before demodulation
Before modulation
After modulation
Which of the following is correct about pre-emphasis?
Improves S/N ratio
Done before modulation
Boost high frequency components in message signal
All of the above
Simplest form of PAM modulator
Filter
Amplifier
Analog switch
Oscillator
Noise suppression ability of FM signal decreases with
Decrease in frequency
Increase in frequency
Decrease in amplitude
Increase in amplitude
Filter is
Amplitude selective network
Phase selective network
Frequency selective network
None of the above
