TTMER3: Alapsávi digitális jelátvitel rézkábelen

Control questions

1. Review services of measuring transmitters!
2. Draw the block diagram of a measuring transmitter!
3. Review services of measuring receivers!
4. Draw the block diagram of a measuring receiver!
5. Draw a circuit diagram draft about the input circuits of transmission technique measuring receivers!
   (This draft can be prepared at home in advance, and given in, including your name on it!)
6. What does synchronous tuning mean, and what are the conditions of the realization in the case of a measuring transmitter/receiver pair?
7. What kind of line coding methods do you know?
8. How can you generate bipolar and duobinar signal sequence from a binary signal sequence?
9. What kind of basic requirements are put up in connection with the line coding methods?
10. Review some line coding methods used in practice!
11. Draw the spectrum of the pseudo-random binary signal sequence (PRBS) and enumerate the main characteristics of the spectrum!
12. What is the eye pattern? How can you visualize it? What kind of conclusions can you draw from an eye pattern about the quality of transmission?
13. How can you generate a PRBS signal?
14. Draw an AMI coding circuit!
    
    • Inputs:
      • IN - TTL data signal
      • CLK - TTL clock signal
    • Outputs:
      • OUT1 - TTL switch control signal "1" - if a positive pulse should be given out
      • OUT2 - TTL switch control signal "1" - if a negative pulse should be given out
    (This circuit diagram can be prepared at home in advance, and given in, including your name on it!)
15. Draw an AMI decoding circuit!
    
    • Inputs:
      • IN1 - TTL signal "1" - if a positive pulse received
      • IN2 - TTL signal "1" - if a negative pulse received
      • CLK - clock signal obtained from the TTL signal
    • Outputs:
      • IN - TTL data signal
      • CLK - TTL clock signal
    (This circuit diagram can be prepared at home in advance, and given in, including your name on it!)
16. Draw a Manchester II coding circuit!
    • Inputs:
      • IN - TTL data signal
      • CLK2 - TTL clock signal with double frequency
    • Outputs:
      • OUT - TTL coded signal
17. Draw a Manchester II decoding circuit!
    • Inputs:
      • IN - TTL coded data signal
      • CLK2 - clock signal obtained from the double frequency TTL signal
    • Outputs:
      • OUT - TTL decoded signal
18. Draw a bipolar coding circuit!
    • Inputs:
      • IN - TTL data signal
      • CLK - TTL clock signal
    • Outputs:
      • OUT1 - TTL switch control signal "1" - if a positive pulse should be given out
      • OUT2 - TTL switch control signal "1" - if a negative pulse should be given out
    (This circuit diagram can be prepared at home in advance, and given in, including your name on it!)
19. Draw a duobinar coding circuit!
    • Inputs:
      • IN - TTL data signal
      • CLK - TTL clock signal
    • Outputs:
      • OUT1 - TTL switch control signal "1" - if a positive pulse should be given out
      • OUT2 - TTL switch control signal "1" - if a double positive pulse should be given out
    (This circuit diagram can be prepared at home in advance, and given in, including your name on it!)
20. Draw the circuit of the termination of a filter with R₀ wave impedance, if the generator is with 0 ohm, and if an oscilloscope is connected to the output of the filter! How could you realize the termination, if the inner impedance of the generator is 2R₀?
21. How could the creators of the HDSL system reduce the claim for bandwidth of the transmittable signal?
22. Draw the draft of a two-wired echo compensated whole duplex digital transmission system!
23. What kind of interfaces has a HDSL modem?
24. Review the frame types applied in the HDSL system!
25. Draw a block diagram of a HDSL system!