1. Explain the concept of the signal "phase".

2. What is the phase shift of two signals?

3. Name the main methods of measuring the phase shift.

4. What does the method of the linear sweeping of the phase shift measurement by means of an oscillograph consist of?

5. How is the phase shift measured by means of an oscillograph, using an ellipse method?

6. How is the phase shift measured by a circular sweep method?

7. What is the operation principle of the phase meter with the phase conversion to the time interval?

8. What method of the phase shift measurement is used in compensating phase meters?

9. How is the phase shift measured in the SHF range? 

10. Explain the operation principle of the digital phase meter, measuring a mean phase value. Draw the timing diagrams. 

11. How does the digital phase meter based on the microprocessor work? 

12. How does the phase meter with the heterodyne frequency conversion of the studied signal operate?

13. In what cases phase meters with frequency multiplication are applied? 

14. Explain the principle of measuring the phase shift by the phase detector. 

15. For what purposes are oscilloscopes used?  

16. What types of oscilloscopes are used in measuring tasks?  

17. What units are parts of the basic oscilloscope block diagram? What are their purposes?

18. For what purposes is the sweep synchronization in an electronic oscilloscope used?  

19. Enumerate the main types of synchronization.  

20. What for do they use amplitude calibrators in oscilloscopes?  

21. What is the purpose of the linear-changing voltage fed onto horizontal plates?  

22. Structure, operating principle, parameters and characteristics of CRT.  

23. What types of display panels are used in modern oscilloscopes?  

24. Operating principles and parameters of a storage oscilloscope.  

25. Name peculiarities of the pulses oscillographic testing of nanosecond duration?

26. How a stroboscopic oscilloscope works?

27. What requirements are put to the sweep voltage?

28. How a saw-tooth generator works?

29. Enumerate the main sweep types.

30. How is the signals amplitude measured with the help of an oscilloscope?

31. How is the time intervals measurement done with the help of the calibrated sweep and brightness marks?

32. What requirements are put to an oscilloscope while measuring pulse signals?

33. Explain the aufbau principle (construction principle) of digital oscilloscopes.  

34. Name the main parameters and characteristics of a modern digital oscilloscope.  

35. For what purposes the signals spectral analysis is used?

36. What physical meaning is the basis of direct and inverse Fourier transforms?

37. What is the basis of spectrum parallel and consecutive analysis of the signals under study?

38. How does the simplified block diagram of the parallel action analyzer look like?

39. What is the connection between DFT and harmonic components of a signal?

40. How DFT is used in digital analyzers?

41. What is the essence FFT?

42. What is called the spectrum analyzer resolution?

43. In what way resolution and the analyzer filter pass-band are connected?

44. What is the simplified block diagram of the consecutive type spectrum analyzers?

45. How is the analysis speed connected with the spectrum analyzer pass-band?

46. What the analysis time is equal to in consecutive type circuits?

47. What is the basis of the aufbau (construction) principle of the heterodyne spectrum analyzer of consecutive type?

48. Name the main characteristics of a heterodyne analyzer.

49. What is the structure of a nonrecursive digital filter?

50. How recursive digital filters are build?

51. Write down the mathematical expression for harmonic factor.

52. Explain the algorithm of practical determination of harmonic factor.