WorksheetsChapter 2 Telecom
Total questions: 10
Worksheet time: 5mins
What is the definition of modulation?
Changing the amplitude of modulated signal.
Changing the frequency of modulated signal.
Changing the phase of modulated signal.
All the answers above.
In modulation technique, carrier signal is in __________ while information signal is in ___________.
high frequency, high frequency
low frequency, low frequency
high frequency, low frequency
low frequency, high frequency
Why the information signal needs to be modulated?
To reduce the interferences.
To overcome instrument/circuit limitation.
For more efficient transmission of information signal
To generate suitable modulated signal.
When the information signals amplitude is _______, the carrier signal amplitude also ________.
(a)
What is the characteristic that NOT belong to information signal?
High frequency
Low frequency
May consist of single or multiple frequency
For example, audio signal and human voices
In Frequency Modulation (FM) technique, the _____ and ______ are remained, but the ______ is constant.
frequency, amplitude, phase
frequency, phase, amplitude
amplitude, phase, frequency
The advantages of digital transmission compared to analog transmission are listed below except:
Noise Immunity
Reduction of errors
High security
Expensive digital circuitry
There are 4 predominant techniques for Pulse Modulation except:
Pulse Position Modulation (PPM)
Pulse Amplitude Modulation (PAM)
Pulse Phase Modulation (PPM)
Pulse Code Modulation (PCM)
_____ is used as an intermediate form of modulation with PCM, PSK and QAM
Pulse Width Modulation (PWM)
Pulse Amplitude Modulation (PAM)
Pulse Position Modulation (PPM)
Pulse Code Modulation (PCM)
PCM consists of sequent steps to digitize an analog signal, namely as _______.
Sampling,
Encoding, Quantizing
Encoding, Sampling,
Quantizing
Quantizing, Sampling, Encoding
Sampling, Quantizing, Encoding
