*Question E1A07:
[97.313(k)] What is the maximum power permitted on the 2200-meter band?*  

*Correct Answer is  C: 1 watt EIRP (equivalent isotropic radiated power)*  

### AI Response: (may contain errors)  

The correct answer to the question about the maximum power permitted on the 2200-meter band is **1 watt EIRP (equivalent isotropic radiated power)**.

### Explanation:

1. **Correct Answer: 1 watt EIRP (equivalent isotropic radiated power)**
   - The FCC regulations specify that the maximum power allowed on the 2200-meter band is 1 watt EIRP. EIRP is a measure of the power radiated by an antenna as if it were radiating equally in all directions (isotropically). This limitation is in place to minimize interference with other services and ensure safe operation within this band.

2. **Why Other Choices Are Incorrect:**
   - **50 watts PEP (Choice A):** This is incorrect because the power limit is specified in terms of EIRP, not PEP. PEP refers to the peak envelope power, which is the maximum power level of a signal during a transmission cycle, but it is not the measure used for the 2200-meter band.
   - **100 watts PEP (Choice B):** Similar to Choice A, this is incorrect because the power limit is not specified in PEP. The 2200-meter band uses EIRP as the measure for power limits.
   - **5 watts EIRP (Choice D):** This is incorrect because it exceeds the maximum allowed EIRP of 1 watt for the 2200-meter band.

### Useful Formula:

- **EIRP Calculation:**
  $$ EIRP = P_T \times G_A $$
  where:
  - $P_T$ = transmitter power in watts
  - $G_A$ = antenna gain (linear)

This formula helps calculate the EIRP by considering both the transmitter power and the antenna gain. For the 2200-meter band, the EIRP must not exceed 1 watt.