DYXS-TX Communication System Principle Training Platform

1. M*n functional components

1. Provide DC regulated power supply of ±15V/0.5A; ±6V/0.5A; ±12V/0.5A, a total of six channels.

2. The CPU microprocessor and circuit interface constitute the overall controller of the system

3. 8-bit digital tube is used to display the experimental status and results of the system

4. 16-button membrane keyboard for setting signals and experimental modes

5. Various digital signal generation circuits designed with CPLD

6. Frame synchronization signal recognition and extraction circuit

7. Pseudo-random code and special code generation circuit

8. Low frequency sine wave signal generator

9. CPU microprocessor and circuit interface

10. Sampling Theorem and Pulse Amplitude Modulation (PAM) Circuit Module

11. Pulse Code Modulation (PCM) Circuit Module

12. Incremental modulation (M) encoding and decoding circuit module

13. Phase shift keying PSK demodulation receiving and modulation sending circuit module

14. HDB3 code conversion circuit module, which has three parts: clock division, encoding and decoding

15. FSK power line carrier communication circuit module

16. Digital communication system ADPCM clock, ADPCM input and output, ADPCM receiving, and ADPCM transmitting circuit modules.

17. Virtual simulation system for electricity safety and electric shock first *d

The software uses a combination of two-dimensional and three-dimensional virtual images to teach students the safety and first *d methods of electricity use. The software has single-phase electric shock, two-phase electric shock, step electric shock, low-voltage electric shock first *d, high-voltage electric shock first *d, artificial respiration rescue method, hand-holding breathing rescue method, chest cardiac compression rescue method and other principle explanations and teaching. Single-phase electric shock is divided into m*ntenance of live disconnection, m*ntenance of socket electric shock, outdoor electric shock and other principle demonstrations. Low-voltage electric shock and high-voltage electric shock teaching m*nly expl*n and demonstrate to students how to rescue people in low-voltage electric shock or high-voltage electric shock. Artificial respiration rescue method, hand-holding breathing rescue method, chest cardiac compression rescue method are displayed using 3D virtual simulation technology. After rendering and polishing, the model looks the same as the real part and the picture is realistic. Through practical tr*ning, students can be educated on safe use of electricity in the tr*ning room, improve their safety awareness, learn some self-rescue methods, and take cert*n safety measures to protect themselves when they encounter danger, as well as be familiar with the causes of various electrical accidents and practical operational measures for handling electrical accidents, so as to reduce the occurrence of electrical accidents.

2. Experimental Content

1. Experiments on generation and formation of various digital signals

2. Frame synchronization signal recognition, extraction and analysis experiment

3. Pseudo-random code and special code observation, measurement and analysis experiment

4. Synchronous sine wave signal generation and application experiment

5. CPU microprocessor and circuit interface experiment

6. Communication system principle circuit module operation experiment

7. Communication circuit terminal transmission amplification experiment

8. Communication circuit terminal receiving filter experiment

9. Sampling Theorem Experiment

10. Pulse amplitude modulation (PAM) and system experiments.

11. Experiment of observing A-law PCM eight-bit coding using synchronous source signal

12. Pulse Code Modulation (PCM) and system experiments

13. PCM coding time division multiplexing timing analysis experiment

14. Incremental modulation CVSD (△M) coding experiment

15. Perform coding comparison experiment under variable clock state (△M)

16. Continuously variable slope delta modulation (△M) decoding experiment

17. Incremental modulation (△M) system characteristics and index test experiment

18. Comparative experiment of (PCM and △M) system performance under the same conditions

19. Frequency Shift Keying (FSK) Modulation and Demodulation Experiment

20. Two-phase BPSK modulation and demodulation experiment

21. Two-phase DPSK modulation and demodulation experiment

22. PSK carrier extraction experiment

23. Signal code regeneration experiment

24. Bit synchronization and bit timing extraction experiments

25. Eye diagram observation and analysis experiment

26. CPU simulation eye diagram observation and measurement experiment

27. Basic phase-locked loop experiment

28. Bandwidth measurement experiment of synchronous belt and catch belt

29. Phase-locked digital frequency synthesizer experiment

30. HDB3 code conversion encoding and decoding observation experiment

31. Comprehensive experiment on speech signal and communication system principle

32. Single test box realizes simplex communication system experiment

33. Two experimental boxes realize duplex communication system experiment

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