E9H02
1. Which is generally true for 160- and 80-meter receiving antennas?
E4C11
2. Why does input attenuation reduce receiver overload on the lower frequency HF bands with little or no impact on signal-to-noise ratio?
E4D05
3. What transmitter frequencies would create an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?
E5A08
4. What is the phase relationship between the current through and the voltage across a series resonant circuit at resonance?
E4E01
5. What problem can occur when using an automatic notch filter (ANF) to remove interfering carriers while receiving CW signals?
E9A06
6. What is the effective radiated power (ERP) of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?
E9B08
7. What is the far field of an antenna?
E9E08
8. What is a use for a Wilkinson divider?
E8C03
9. Why should the phase of a PSK signal be changed at the zero crossing of the RF signal?
E4B04
10. Which S parameter represents input port return loss or reflection coefficient (equivalent to VSWR)?
E7A02
11. What is the function of a decade counter?
E2B09
12. What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol?
E5D11
13. How much real power is consumed in a circuit consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?
E2D05
14. What is the characteristic of the JT65 mode?
E8A09
15. How many different input levels can be encoded by an analog-to-digital converter with 8-bit resolution?
E1F07
16. When may an amateur station send a message to a business?
E1C03
17. How long must an operator wait after filing a notification with the Utilities Technology Council (UTC) before operating on the 2200-meter or 630-meter band?
E6F03
18. What is the most common configuration of an optoisolator or optocoupler?
E7H09
19. What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital-to-analog converter, and a low-pass anti-alias filter?
E6E01
20. Why is gallium arsenide (GaAs) useful for semiconductor devices operating at UHF and higher frequencies?
E7C10
21. Which of the following filters is used in a 2-meter band repeater duplexer?
E1D06
22. What is the maximum permitted transmitter output power when operating a model craft by telecommand?
E2E01
23. Which of the following types of modulation is used for data emissions below 30 MHz?
E7D02
24. How does a switchmode voltage regulator work?
E0A07
25. What is meant by "100% tie-off" regarding tower safety?
E3A13
26. Which of these emission modes is best for auroral propagation?
E7B06
27. What is a characteristic of a grounded-grid amplifier?
E6A01
28. In what application is gallium arsenide used as a semiconductor material?
E9C11
29. How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus soil?
E9D07
30. What is an advantage of top loading an electrically short HF vertical antenna?
E6B07
31. What causes a junction diode to fail from excessive current?
E2C02
32. Which of the following file formats is used for exchanging amateur radio log data?
E4A05
33. What is the purpose of using a prescaler with a frequency counter?
E3C06
34. How does the VHF/UHF radio horizon compare to the geographic horizon?
E9G07
35. On the Smith chart shown in Figure E9-3, what is the only straight line shown?
E6C04
36. Which of the following is an advantage of BiCMOS logic?
E5C02
37. How are impedances described in polar coordinates?
E7F03
38. What type of digital signal processing filter is used to generate an SSB signal?
E3B09
39. At what time of year is sporadic-E propagation most likely to occur?
E8D03
40. Which describes spread spectrum frequency hopping?
E5B07
41. 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?
E7E09
42. What occurs when the input signal levels to a mixer are too high?
E1A08
43. If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?
E8B07
44. Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?
E1B02
45. Which of the following is an acceptable bandwidth for digital voice or slow-scan TV transmissions made on the HF amateur bands?
E7G11
46. What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 3,300 ohms and RF is 47 kilohms?
E6D03
47. Which of the following is an aspect of the piezoelectric effect?
E9F04
48. What impedance does a 1/2-wavelength transmission line present to an RF generator when the line is shorted at the far end?
E2A12
49. What is the purpose of digital store-and-forward functions on an amateur radio satellite?
E1E03
50. What is a Volunteer Examiner Coordinator?
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