Technician 2022-2026T4B10
Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?
C
Answer
Station setup and equipment operation
Type
A
500 Hz
B
1000 Hz
C
2400 Hz
D
5000 Hz
Answer Notes
Single Sideband (SSB) voice communication requires enough bandwidth to clearly pass human speech without taking up unnecessary space on the band. A bandwidth of approximately 2400 Hz (2.4 kHz) is the standard ideal width to capture the typical human voice frequencies (300 to 2700 Hz).
Using a narrower bandwidth, like 500 Hz or 1000 Hz, would cut off too much of the voice, making it sound muffled or unintelligible (these narrower widths are best suited for CW/Morse code). Conversely, a wider bandwidth like 5000 Hz would let in too much background noise and adjacent station interference, which degrades the signal-to-noise ratio.
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How is a specific group of stations selected on a digital voice transceiver?
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Which of the following must be programmed into a D-STAR digital transceiver before transmitting?