Question
What is the purpose of a speech processor in a transceiver?
Answer Options
- 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
- D) Decrease high-frequency voice output to prevent out-of-band operation
Correct Answer: A
Explanation
Speech processing is a technique used in Single Sideband (SSB) communication to maximize the average power of the transmitted voice signal. Human speech has a high peak-to-average power ratio, meaning the average power is much lower than the peak power.
The processor works by selectively clipping and compressing the voice peaks, reducing the peak-to-average ratio. This allows the overall transmit power level to be raised without exceeding the amplifier’s maximum output, resulting in an increase in the apparent loudness of transmitted voice signals at the receiving station, which improves readability in poor conditions.
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