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射频复习材料2.doc

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射频复习材料2

Electrical, Electronics Engineering Department Student Number: ______________________ Name: _______________________________ UEENEEH076C. RF Technology 2. Bank Multi-Choice. for Student Revision. Question No:1. (Refer to page 8 Harmonics Book 2 of 2). With respect to the “Nature of Digital Signals” define the following: Fundamental frequency. Odd Harmonic frequencies. Even Harmonic frequencies. Resultant frequency. Question No:2. (Refer to page 9. Digital Signals. Book 2 of 2). Define the characteristics of “Pulse coded modulation systems”. (eg. The relationship between Transmission Speed and Distance) Question No:3. (Refer to page 11. Digital signals transmission mediums. Book 2 of 2). With reference to the diagram above determine the following: (a) The type of “Line Code” represented. (b) The binary data represented. Question No:4. (Refer to page 13. Some of the codes available. Book 2 of 2). With reference to the diagram above determine the following: (a) The type of “Line Codes” represented. (b) The binary data represented. (c) The advantages/disadvantages of each code. Question No:5. (Refer to page 13. Some of the codes available. Book 2 of 2). (Refers to Diagram No:4.) Use the following line codes to represent the Binary code1000 0101 0000 0011: (a) Bi-Polar RZ. (b) Polar NRZ. (c) Manchester . (d) Differential Manchester. Question No:6. (Refer to page 15. Signal spectrum evaluation. Book 2 of 2). Define the characteristics of AMI line code that make it suitable for Pulse code modulation (PCM) systems. Question No:7. (Refer to page 15. Signal spectrum evaluation. Book 2 of 2). Define the characteristics of HDB3 line code that make it suitable for Pulse code modulation (PCM) systems. Question No:8. (Refer to page 16. PCM analogue to digital conversion. Book 2 of 2). With respect to PCM analogue to digital conversion define the following: (a) Sampling Rate (relationship to frequency component of the signal being sampled.) (b) Nyq