69 lines
2.9 KiB
Markdown
69 lines
2.9 KiB
Markdown
G4D – Speech processors; S meters; sideband operation near band edges
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- [[G4D01]] (A)
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What is the purpose of a speech processor in a transceiver? #card
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- A. Increase the apparent loudness of transmitted voice signals
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- B. Increase transmitter bass response for more natural-sounding SSB signals
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- C. Prevent distortion of voice signals
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- D. Decrease high-frequency voice output to prevent out-of-band operation
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- [[G4D02]] (B)
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How does a speech processor affect a single sideband phone signal? #card
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- A. It increases peak power
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- B. It increases average power
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- C. It reduces harmonic distortion
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- D. It reduces intermodulation distortion
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- [[G4D03]] (D)
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What is the effect of an incorrectly adjusted speech processor? #card
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- A. Distorted speech
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- B. Excess intermodulation products
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- C. Excessive background noise
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- D. All these choices are correct
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- [[G4D04]] (C)
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What does an S meter measure? #card
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- A. Carrier suppression
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- B. Impedance
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- C. Received signal strength
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- D. Transmitter power output
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- [[G4D05]] (D)
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How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter? #card
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- A. It is 10 times less powerful
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- B. It is 20 times less powerful
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- C. It is 20 times more powerful
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- D. It is 100 times more powerful
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- [[G4D06]] (A)
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How much change in signal strength is typically represented by one S unit? #card
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- A. 6 dB
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- B. 12 dB
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- C. 15 dB
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- D. 18 dB
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- [[G4D07]] (C)
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How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9? #card
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- A. Approximately 1.5 times
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- B. Approximately 2 times
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- C. Approximately 4 times
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- D. Approximately 8 times
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- [[G4D08]] (C)
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What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz? #card
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- A. 7.178 MHz to 7.181 MHz
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- B. 7.178 MHz to 7.184 MHz
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- C. 7.175 MHz to 7.178 MHz
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- D. 7.1765 MHz to 7.1795 MHz
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- [[G4D09]] (B)
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What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz? #card
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- A. 14.347 MHz to 14.647 MHz
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- B. 14.347 MHz to 14.350 MHz
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- C. 14.344 MHz to 14.347 MHz
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- D. 14.3455 MHz to 14.3485 MHz
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- [[G4D10]] (A)
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How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB? #card
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- A. At least 3 kHz above the edge of the segment
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- B. At least 3 kHz below the edge of the segment
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- C. At least 1 kHz below the edge of the segment
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- D. At least 1 kHz above the edge of the segment
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- [[G4D11]] (B)
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How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB? #card
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- A. At least 3 kHz above the edge of the band
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- B. At least 3 kHz below the edge of the band
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- C. At least 1 kHz above the edge of the segment
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- D. At least 1 kHz below the edge of the segment
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