What makes a communication system real-time?
It transfers information from input to output as it is produced, without a deliberate delay in sending or reproducing it.
AQA A-level Physics (7408) · 3.13.6.1
Revise AQA A-level Physics (7408) specification point 3.13.6.1, Principles of communication systems (A-level only), with free active-recall flashcards. Flip through the set or review every question and answer below.
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What makes a communication system real-time?
It transfers information from input to output as it is produced, without a deliberate delay in sending or reproducing it.
What is the order of stages from the input transducer to the transmission path in a real-time communication system?
Input transducer → modulator → amplifier → transmitter → transmission path.
What is the order of stages from the receiver to the output transducer in a real-time communication system?
Receiver → amplifier → demodulator → output transducer.
What is the role of the input transducer in a communication system?
It converts information into an electrical signal.
What is the role of the modulator in a communication system?
It uses the information signal to vary a carrier signal so the information can be transmitted.
What is the role of the amplifiers in a real-time communication system?
They increase signal strength before transmission and after reception.
What is the role of the transmitter in a communication system?
It sends the signal along the transmission path.
What is the role of the transmission path in a communication system?
It carries the signal from the transmitter to the receiver.
What is the role of the receiver in a communication system?
It detects the transmitted signal.
What is the role of the demodulator in a communication system?
It recovers the information signal from the modulated carrier.
What is the role of the output transducer in a communication system?
It converts the recovered electrical signal into a suitable output.