*Question G2A07:
Which of the following statements is true of single sideband (SSB)?*  

*Correct Answer is  B: Only one sideband is transmitted; the other sideband and carrier are suppressed*  

### AI Response: (may contain errors)  

Single Sideband (SSB) is a mode of amplitude modulation that is widely used in amateur radio due to its efficiency in terms of bandwidth and power.

1. **Correct Answer Explanation (B):**  
   - In SSB, only one of the sidebands is transmitted, and the carrier along with the other sideband is suppressed. This makes SSB more efficient than traditional AM (Amplitude Modulation), which transmits both sidebands and the carrier. By suppressing the carrier and one sideband, SSB reduces the bandwidth required and concentrates the power into a single sideband, improving signal strength and clarity.

2. **Why Other Choices Are Incorrect:**
   - **Choice A:** This option states that the carrier is transmitted along with one sideband, which is incorrect for SSB. In SSB, the carrier is suppressed to save power and bandwidth.
   - **Choice C:** This option incorrectly claims that SSB is the only voice mode authorized on the 20-, 15-, and 10-meter bands. While SSB is commonly used on these bands, other modes like AM and FM are also permitted.
   - **Choice D:** This option incorrectly claims that SSB is the only voice mode authorized on the 160-, 75-, and 40-meter bands. Similar to choice C, other modes are also allowed on these bands.

3. **Useful Rules of Thumb:**
   - **Bandwidth Efficiency:** SSB typically uses about half the bandwidth of standard AM, which is approximately 3 kHz for voice communications.
   - **Power Efficiency:** By concentrating power into a single sideband, SSB can achieve greater effective communication range for the same transmitter power compared to AM.

Understanding these principles helps in recognizing the advantages of SSB and why it is a preferred mode for many amateur radio operators.