E2C09
1. What type of equipment is commonly used to implement an amateur radio mesh network?
E9G01
2. Which of the following can be calculated using a Smith chart?
E8A06
3. What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?
E1E06
4. Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?
E9C14
5. How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?
E2A03
6. How is the signal inverted by an inverting linear transponder?
E4E01
7. What problem can occur when using an automatic notch filter (ANF) to remove interfering carriers while receiving CW signals?
E7E06
8. Why is de-emphasis commonly used in FM communications receivers?
E9B02
9. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?
E2E01
10. Which of the following types of modulation is common for data emissions below 30 MHz?
E1A09
11. What action or actions should you take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules?
E4A09
12. Which of the following is good practice when using an oscilloscope probe?
E6D01
13. Why should core saturation of an impedance matching transformer be avoided?
E7C03
14. What advantage does a series-L Pi-L-network have over a series-L Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?
E4D05
15. What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?
E5C04
16. What coordinate system is often used to display the resistive, inductive, and/or capacitive reactance components of impedance?
E8B07
17. Orthogonal Frequency Division Multiplexing is a technique used for which type of amateur communication?
E3C12
18. How does the maximum range of ground-wave propagation change when the signal frequency is increased?
E4B05
19. What three test loads are used to calibrate an RF vector network analyzer?
E2B04
20. How is color information sent in analog SSTV?
E9H04
21. What is an advantage of placing a grounded electrostatic shield around a small loop direction-finding antenna?
E7B17
22. Why are odd-order rather than even-order intermodulation distortion products of concern in linear power amplifiers?
E9D05
23. What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
E6E08
24. How is power supplied to the most common type of MMIC?
E8D06
25. What is the advantage of including parity bits in ASCII characters?
E1B07
26. To what type of regulations does PRB-1 apply?
E6F06
27. Which of these materials is most commonly used to create photoconductive devices?
E3A12
28. What is the cause of auroral activity?
E8C04
29. What technique minimizes the bandwidth of a PSK31 signal?
E1F02
30. What privileges are authorized in the U.S. to persons holding an amateur service license granted by the government of Canada?
E2D09
31. What type of modulation is used for JT65 contacts?
E6A08
33. What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?
E5D09
34. What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?
E6B03
35. What type of bias is required for an LED to emit light?
E9A08
36. What is antenna bandwidth?
E1D02
37. Which of the following may transmit special codes intended to obscure the meaning of messages?
E0A02
38. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?
E5A04
39. What is the magnitude of the impedance of a parallel RLC circuit at resonance?
E9F06
40. What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically 1/2 wavelength long at 14.10 MHz?
E9E04
41. What is the purpose of the series capacitor in a gamma-type antenna matching network?
E1C04
42. What is meant by IARP?
E7H07
43. How can an oscillator's microphonic responses be reduced?
E7G09
44. What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?
E7D06
45. What is the purpose of Q1 in the circuit shown in Figure E7-2?
E7A09
46. What logical operation is performed by an exclusive NOR gate?
E4C03
47. What is the term for the suppression in an FM receiver of one signal by another stronger signal on the same frequency?
E3B11
48. At what time of day can sporadic E propagation occur?
E7F03
49. What type of digital signal processing filter is used to generate an SSB signal?
E6C01
50. What is the function of hysteresis in a comparator?
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