*Question G4D02:
How does a speech processor affect a single sideband phone signal?*  

*Correct Answer is  B: It increases average power*  

### AI Response: (may contain errors)  

A speech processor is a device used in single sideband (SSB) phone transmissions to improve the intelligibility and effectiveness of the transmitted signal. Here's how it affects the signal:

1. **Correct Answer: It increases average power (Choice B)**  
   - A speech processor works by compressing the dynamic range of the audio signal. This means it reduces the difference between the loudest and quietest parts of the speech. By doing so, it allows the transmitter to maintain a higher average power level without exceeding the peak power limits. This increase in average power makes the signal more robust and easier to copy, especially in noisy conditions.

2. **Why the other choices are incorrect:**
   - **Choice A: It increases peak power**  
     - A speech processor does not increase peak power. The peak power is typically limited by the transmitter's design and regulatory limits. The processor focuses on maintaining higher average power, not increasing peaks.
   
   - **Choice C: It reduces harmonic distortion**  
     - Harmonic distortion is related to the generation of unwanted harmonics in the signal. A speech processor does not specifically target harmonic distortion; it is more concerned with the dynamic range of the audio signal.
   
   - **Choice D: It reduces intermodulation distortion**  
     - Intermodulation distortion occurs when multiple signals mix and create additional unwanted signals. While a speech processor can help manage levels to avoid overdriving the transmitter (which can cause intermodulation), its primary function is not to reduce intermodulation distortion.

In summary, the main role of a speech processor in SSB is to increase the average power of the transmitted signal, thereby improving its effectiveness in communication.