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