ELECTRONIC COMMUNICATIONS
COMPREHENSIVE EXAMINATION TEST
2026 CERTIFICATION EVALUATION
SIGNALS AND SYSTEMS PRACTICE BANK
◉ Types of Analog Modulation
Answer: Amplitude Modulation (AM), Frequency Modulation (FM),
Phase Modulation (PM).
◉ Types of Digital Modulation
Answer: Amplitude Shift Keying (ASK), Frequency Shift Keying
(FSK), Phase Shift Keying (PSK).
◉ Multiplexing Contribution
Answer: Enables multiple signals to be sent simultaneously over a
single communication channel.
◉ Multiplexer
Answer: Device that combines multiple signals before transmission
in a multiplexing system.
◉ Demultiplexer
, Answer: Separates signals at the receiving end in a multiplexing
system.
◉ Basic Techniques for Transmitting Information
Answer: Modulation and Multiplexing.
◉ Baseband Transmission Definition
Answer: Direct transmission of an electronic signal that is already
compatible with the communication channel.
◉ Example of Baseband Transmission System
Answer: Telephone system.
◉ Difference Between Analog and Digital Modulation
Answer: Analog modulation involves varying continuous signals,
while digital modulation deals with discrete signals like binary data.
◉ Amplitude Modulation (AM)
Answer: It varies the amplitude of the carrier signal according to the
information signal.
◉ Frequency Modulation (FM)
Answer: It alters the frequency of the carrier signal.
COMPREHENSIVE EXAMINATION TEST
2026 CERTIFICATION EVALUATION
SIGNALS AND SYSTEMS PRACTICE BANK
◉ Types of Analog Modulation
Answer: Amplitude Modulation (AM), Frequency Modulation (FM),
Phase Modulation (PM).
◉ Types of Digital Modulation
Answer: Amplitude Shift Keying (ASK), Frequency Shift Keying
(FSK), Phase Shift Keying (PSK).
◉ Multiplexing Contribution
Answer: Enables multiple signals to be sent simultaneously over a
single communication channel.
◉ Multiplexer
Answer: Device that combines multiple signals before transmission
in a multiplexing system.
◉ Demultiplexer
, Answer: Separates signals at the receiving end in a multiplexing
system.
◉ Basic Techniques for Transmitting Information
Answer: Modulation and Multiplexing.
◉ Baseband Transmission Definition
Answer: Direct transmission of an electronic signal that is already
compatible with the communication channel.
◉ Example of Baseband Transmission System
Answer: Telephone system.
◉ Difference Between Analog and Digital Modulation
Answer: Analog modulation involves varying continuous signals,
while digital modulation deals with discrete signals like binary data.
◉ Amplitude Modulation (AM)
Answer: It varies the amplitude of the carrier signal according to the
information signal.
◉ Frequency Modulation (FM)
Answer: It alters the frequency of the carrier signal.
