Data communication systems (AQA A-Level Physics): Flashcards
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Communication system
Communication system
Structured setup to transfer information from one point to another
Components in a communication system
Components in a communication system
Nine components
Input transducer function
Input transducer function
Converts input information into an electrical signal
Modulator function
Modulator function
Modifies signal for transmission; superimposes onto carrier wave
Transmission amplifier function
Transmission amplifier function
Increases amplitude so signal travels further and resists noise
Attenuation
Attenuation
Loss of signal strength during transmission
Transmitter function
Transmitter function
Converts electrical signal to form suitable for transmission
Receiver function
Receiver function
Detects transmitted signal & converts to electrical form
Demodulator function
Demodulator function
Extracts original information signal from carrier wave
Output transducer function
Output transducer function
Converts signal back to its original format