E9G05
1. Which of the following is a common use for a Smith chart?
E6C05
2. Which of the following digital logic families has the lowest power consumption?
E4D09
3. What is the purpose of the preselector in a communications receiver?
E9H06
4. What indicates the correct value of terminating resistance for a Beverage antenna?
E8D11
5. What is one advantage of using ASCII code for data communications?
E6A03
6. Why does a PN-junction diode not conduct current when reverse biased?
E7C03
7. What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network?
E1A03
8. What is the highest legal carrier frequency on the 20-meter band for transmitting a 2.8 kHz wide USB data signal?
E9B01
9. What is the 3 dB beamwidth of the antenna radiation pattern shown in Figure E9-1?
E7G10
10. What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 1,800 ohms and RF is 68 kilohms?
E7F12
11. Which of the following is generally true of Finite Impulse Response (FIR) filters?
E7E05
12. What is added to an FM speech channel to boost the higher audio frequencies?
E9F07
13. How does parallel conductor transmission line compare to coaxial cable with a plastic dielectric?
E2B01
14. In digital television, what does a coding rate of 3/4 mean?
E6F02
15. What happens to photoconductive material when light shines on it?
E9A04
16. Which of the following factors affect the feed point impedance of an antenna?
E1F08
17. Which of the following types of amateur station communications are prohibited?
E5D05
18. What parasitic characteristic causes electrolytic capacitors to be unsuitable for use at RF?
E5C03
19. Which of the following represents a pure inductive reactance in polar coordinates?
E7D10
20. Why is a switching type power supply less expensive and lighter than an equivalent linear power supply?
E8C07
21. What is the bandwidth of a 4,800-Hz frequency shift, 9,600-baud ASCII FM transmission?
E7B07
22. Which of the following is the likely result of using a Class C amplifier to amplify a single-sideband phone signal?
E4A01
23. Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?
E5B07
24. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?
E0A02
25. When evaluating RF exposure levels from your station at a neighbor's home, what must you do?
E1C09
26. What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?
E3B05
27. Which of the following paths is most likely to support long-distance propagation on 160 meters?
E7A10
28. What is a truth table?
E3A02
29. What characterizes libration fading of an EME signal?
E9D12
30. What is the purpose of making a Yagi's parasitic elements either longer or shorter than resonance?
E5A12
31. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?
E1B02
32. Which of the following is an acceptable bandwidth for digital voice or slow-scan TV transmissions made on the HF amateur bands?
E1D04
33. Which of the following is required in the identification transmissions from a balloon-borne telemetry station?
E6E09
34. Which of the following component package types have the least parasitic effects at frequencies above the HF range?
E9E02
35. What antenna matching system matches coaxial cable to an antenna by connecting the shield to the center of the antenna and the conductor a fraction of a wavelength to one side?
E1E04
36. What is required to be accredited as a Volunteer Examiner?
E8B07
37. Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?
E2D11
38. How do APRS stations relay data?
E3C04
39. What does the value of Bz (B sub z) represent?
E7H12
40. Which of the following ensures that a crystal oscillator operates on the frequency specified by the crystal manufacturer?
E2E02
41. Which of the following synchronizes WSJT-X digital mode transmit/receive timing?
E4C02
42. Which of the following receiver circuits can be effective in eliminating interference from strong out-of-band signals?
E4E10
43. Which of the following can create intermittent loud roaring or buzzing AC line interference?
E6B08
44. Which of the following is a Schottky barrier diode?
E9C10
45. Which of the following describes a Zepp antenna?
E2C09
46. What type of equipment is commonly used to implement an amateur radio mesh network?
E2A06
47. What are Keplerian elements?
E6D12
48. What causes inductor saturation?
E8A02
49. Which of the following is a type of analog-to-digital conversion?
E4B05
50. What three test loads are used to calibrate an RF vector network analyzer?
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