*Question G4B12:
What effect can strong signals from nearby transmitters have on an antenna analyzer?*  

*Correct Answer is  B: Received power that interferes with SWR readings*  

### AI Response: (may contain errors)  

To understand the effect of strong signals from nearby transmitters on an antenna analyzer, let's break down the options:

1. **Correct Answer: B - Received power that interferes with SWR readings**

   - **Explanation**: An antenna analyzer is designed to measure the impedance and SWR (Standing Wave Ratio) of an antenna system. When strong signals from nearby transmitters are present, they can introduce additional power into the antenna system. This external power can affect the analyzer's ability to accurately measure the SWR, leading to incorrect readings. The analyzer might interpret the additional power as part of the reflected power, skewing the SWR results.

2. **Why the other choices are incorrect:**

   - **Choice A: Desensitization which can cause intermodulation products which interfere with impedance readings**
     - **Explanation**: While desensitization and intermodulation are issues in radio receivers, they are not typically relevant to the operation of an antenna analyzer. Analyzers are not designed to receive signals in the same way as a radio receiver, so intermodulation products are not a primary concern for impedance readings.

   - **Choice C: Generation of harmonics which interfere with frequency readings**
     - **Explanation**: Harmonic generation is more related to transmitters rather than antenna analyzers. Analyzers do not typically generate harmonics that would interfere with frequency readings. Their primary function is to measure impedance and SWR, not to generate or measure frequencies in a way that would be affected by harmonics.

   - **Choice D: All these choices are correct**
     - **Explanation**: Since only choice B is correct, this option is incorrect. The issues described in choices A and C do not apply to the operation of an antenna analyzer in the context of strong nearby signals.

In summary, the primary concern with strong signals from nearby transmitters is their potential to interfere with SWR readings by introducing additional power into the system, which can lead to inaccurate measurements.