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school 2025

DP7 Test bench for cable communication

Test bench that models a cable between two buildings and measures bit error rate and packet loss in UART communication.

Problem statement

How is the bit error rate in cable-based UART communication affected by baud rate and signal-to-noise ratio? Since the cable did not exist yet, a test bench was built that models attenuation and noise.

Scope

Figures

The test bench on a breadboard.
The test bench on a breadboard.
Block diagram of the test bench with channel model and noise source.
Block diagram of the test bench with channel model and noise source.
Circuit diagram for the channel model and noise amplifier.
Circuit diagram for the channel model and noise amplifier.
Bit error rate as a function of baud rate.
Bit error rate as a function of baud rate.
Bit error rate as a function of signal-to-noise ratio.
Bit error rate as a function of signal-to-noise ratio.

The report

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