Experiment 15: Decoding Manchester Encoded Data
Objective: Decode Manchester-encoded data to understand its encoding and verify the accuracy of transmitted information.
Background:
Manchester encoding is a method of encoding digital data where each bit is represented by a transition. A logical "1" is represented by a high-to-low transition, and a logical "0" is represented by a low-to-high transition. This method ensures synchronization and avoids long periods of constant signal levels.
Steps:
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Capture the Encoded Signal:
- Connect the logic analyzer to the signal source transmitting the Manchester-encoded data.
- Set the logic analyzer to an appropriate sampling rate to ensure accurate signal capture.
- Start capturing the signal and save the waveform for analysis.
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Configure the Decoder Software:
- Load the captured signal into the decoder software or use real-time decoding tools available with your analyzer.
- Set the software to interpret Manchester encoding by specifying the expected bit rate or timing parameters.
- Run the decoding process and observe the extracted binary data.
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Verify the Decoded Data:
- Compare the decoded bits with the expected transmitted data to verify correctness.
- If discrepancies are found, check the signal quality, sampling rate, or potential transmission errors.
- Document the findings and evaluate the encoding performance.
Expected Outcome:
By the end of this experiment, you will understand the principles of Manchester encoding, learn how to capture and decode such signals, and validate the integrity of the transmitted data.
