Physics - Unit - Flashcards in BTEC National Applied Science

1. Explain step 1 when converting an analogue signal to a digital signal

Use a transducer to produce an analogue electrical signal proportional to the signal you want to send.
Sample the analogue signal using the analogue-to-digital converter.
Connect the output of the transducer to the input of an analogue-to-digital converter.
The cable must be screened by earthling to avoid electrical interference.

1 of 16

Analogue signals transmit waves by changing the time period of the wave through a range of values. Digital signals only transmit at a single amplitude in short bursts.
Analogue signals transmit waves by changing the amplitude of the wave through a range of values. Digital signals only transmit at a single amplitude in short bursts.
Analogue signals transmit waves by changing the displacement of the wave through a range of values. Digital signals only transmit at a single amplitude in short bursts.
Analogue signals transmit waves by changing the wavelength of the wave through a range of values. Digital signals only transmit at a single amplitude in short bursts.

Sample the analogue signal using the analogue-to-digital converter.
Connect the output of the transducer to the input of an analogue-to-digital converter.
The cable must be screened by earthling to avoid electrical interference.
Use a transducer to produce an analogue electrical signal proportional to the signal you want to send.

Bit depth and sample rate will affect loss of information.
the number of samples per second (frequency).
The amount of information in the sample and its affects the value that can be given to the amplitude per sample and so will affect the accuracy of the sample.
Bit depth and sample rate will affect loss of connections.

information source -> input transducer -> transmitter -> Chanel-> receiver -> output transducer.
information source -> output transducer -> transmitter -> Chanel-> receiver -> input transducer.
Chanel-> input transducer -> transmitter -> information source -> receiver -> output transducer.
information source -> input transducer -> transmitter -> Chanel-> output transducer -> receiver