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- FCC Technician Exam Question Pool. Subelement 3AH.
- Signals and Emissions. 2 Questions.
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- 3H 1.1 A
- What is emission type N0N?
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- A. Unmodulated Carrier.
- B. Telegraphy by On/Off keying.
- C. Telegraphy by keyed tone.
- D. Telegraphy by Frequency Shift Keying.
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- 3H 1.2 C
- What emission type is A3E?
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- A. Frequency Modulated Telephony.
- B. Facsimile.
- C. Double Sideband, Amplitude Modulated Telephony.
- D. Amplitude Modulated Telegraphy.
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- 3H 1.3 A
- What emission type is J3E?
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- A. Single Sideband Suppressed Carrier
- Amplitude Modulated Telephony.
- B. Single Sideband Suppressed Carrier
- Amplitude Modulated Telegraphy.
- C. Independent Sideband Suppressed Carrier
- Amplitude Modulated Telephony.
- D. Single Sideband Suppressed Carrier
- Frequency Modulated Telephony.
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- 3H 1.4 B
- What emission type is F1B?
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- A. Amplitude Shift Keyed telegraphy.
- B. Frequency Shift Keyed telegraphy.
- C. Frequency Modulated telephony.
- D. Phase Modulated telephony.
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- 3H 1.5 B
- What emission type is F2B?
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- A. Frequency Modulated Telephony.
- B. Frequency Modulated Telegraphy using audio tones.
- C. Frequency Modulated Facsimile using audio tones.
- D. Phase Modulated Television.
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- 3H 1.6 D
- What emission type is F3E?
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- A. AM telephony.
- B. AM telegraphy.
- C. FM telegraphy.
- D. FM telephony.
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- 3H 1.7 A
- What is the emission symbol for Telegraphy by Frequency
- Shift Keying without the use of a modulating tone?
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- A. F1B.
- B. F2B.
- C. A1A.
- D. J3E.
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- 3H 1.8 B
- What is the emission symbol for Telegraphy by the
- On/Off keying of a Frequency Modulating tone?
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- A. F1B.
- B. F2A.
- C. A1A.
- D. J3E.
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- 3H 1.9 B
- What is the emission symbol for
- Telephony by Amplitude Modulation?
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- A. A1A.
- B. A3E.
- C. J2B.
- D. F3E.
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- 3H 1.10 B
- What is the emission symbol for
- Telephony by Frequency Modulation?
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- A. F2B.
- B. F3E.
- C. A3E.
- D. F1B.
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- 3H 2.2 A
- What is the meaning of the term MODULATION?
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- A. The process of varing some characteristic of a carrier
- wave for the purpose of conveying information.
- B. The process of recovering audio
- information from a received signal.
- C. The process of increasing the average power
- of a Single Sideband transmitter.
- D. The process of supressing the carrier
- in a Single Sideband transmitter.
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- 3H 6.1 B
- What characteristic makes emission F3E especially well suited
- for local VHF/UHF radiocommunications?
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- A. Good audio fidelity and intelligibility
- under weak signal conditions.
- B. Good audio fidelity and high signal to noise
- ratio above a certain signal amplitude threshold.
- C. Better rejection of multipath distortion than the AM modes.
- D. Better carrier frequency stability than the Am modes.
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- 3H 6.2 D
- What emission is produced by a transmitter
- using a reactance modulator?
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- A. A1A
- B. N0N
- C. J3E
- D. G3E
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- 3H 7.1 C
- What other emission does phase modulation most resemble?
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- A. Amplitude Modulation.
- B. Pulse Modulation.
- C. Frequency Modulation.
- D. Single Sideband Modulation.
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- 3H 9.2 B
- What emission does not have sidebands resulting from modulation?
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- A. A3E
- B. N0N
- C. F3E
- D. F2B
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- 3H 12.1 D
- To what is the deviation of an
- emission F3E transmission proportional?
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- A. Only the frequence of the audio modulating signal.
- B. The frequency and the amplitude
- of the audio modulating signal.
- C. The duty cycle of the audio modulating signal.
- D. Only the amplitude of the audio modulating signal.
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- 3H 14.1 B
- What is the result of overdeviation
- in an emission F3E transmitter?
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- A. Increased transmitter power consumption.
- B. Out of channel emissions. (Splatter)
- C. Increased transmitter range.
- D. Inadequate carrier suppression.
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- 3H 14.2 C
- What is SPLATTER?
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- A. Interference to adjacent signals
- caused by excessive transmitter keying speeds.
- B. Interference to adjacent signals
- caused by improper transmitter neutralization.
- C. Interference to adjacent signals
- caused by overmodulation of a transmitter.
- D. Interference to adjacent signals
- caused by parasitic oscillations at the antenna.
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- 3H 16.1 B
- What emissions are used in Teleprinting?
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- A. F1A, F2B and F1B.
- B. A2B, F1B and F2B.
- C. A1B, A2B and F2B.
- D. A2B, F1A and F2B.
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- 3H 16.2 D
- What two states of teleprinter code are most
- commonly used in Amateur Radiocommunications?
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- A. Dot and Dash.
- B. Highband and Lowband.
- C. Start and Stop.
- D. Mark and Space.
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- 3H 16.3 C
- What emission type results when an AF Shift Keyer is connected
- to the microphone jack of an emission F3E transmitter?
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- A. A2B
- B. F1B
- C. F2B
- D. A1F
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- End of Subelement 3AH.
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