*Question E4D07:
Which of the following reduces the likelihood of receiver desensitization?*  

*Correct Answer is  A: Insert attenuation before the first RF stage*  

### AI Response: (may contain errors)  

To reduce the likelihood of receiver desensitization, you can:

### Correct Answer: A: Insert attenuation before the first RF stage

1. **Why this is correct:**
   - **Receiver desensitization** occurs when a strong signal overloads the receiver's front end, reducing its ability to detect weaker signals. By inserting attenuation before the first RF stage, you reduce the power of incoming signals, preventing overload and maintaining sensitivity to weaker signals.

### Why the other choices are incorrect:

2. **B: Raise the receiver’s IF frequency**
   - Raising the Intermediate Frequency (IF) can help with image rejection but does not directly address desensitization. Desensitization is more about the strength of the incoming signal rather than the frequency at which it is processed.

3. **C: Increase the receiver’s front-end gain**
   - Increasing the front-end gain would actually make desensitization worse. More gain means stronger signals are amplified even more, increasing the likelihood of overload and reducing the receiver's ability to handle weak signals.

4. **D: Switch from fast AGC to slow AGC**
   - Automatic Gain Control (AGC) helps manage signal levels, but switching from fast to slow AGC does not prevent desensitization. Slow AGC might not react quickly enough to sudden strong signals, potentially allowing overload to occur.

### Useful Concept:

- **Attenuation** reduces the amplitude of incoming signals, which can prevent the receiver from being overwhelmed by strong signals. This is a common technique to manage strong signals and maintain receiver performance.