🔍 Key Concepts

• Review what J3E means in radio telephony emission designators (J3E is associated with single sideband suppressed carrier). • Recall the difference between DSB (double sideband) and SSB (single sideband) transmission. • Think about what happens to the carrier and how many sidebands remain in J3E mode.

💭 Think About

• Is J3E a mode that transmits both upper and lower sidebands, or only one of them? • In J3E, is the carrier present at full power, reduced, or suppressed—how does that affect how many sidebands you actually transmit? • Compare a traditional AM signal (one carrier + two sidebands) with J3E. Which parts are removed to save power and bandwidth?

✅ Before You Answer

• Confirm whether J3E corresponds to single sideband or double sideband transmission. • Verify if the carrier is suppressed in J3E, and whether that changes the actual number of sidebands transmitted. • Match the correct option that reflects only the number and type of sidebands present, ignoring any carrier that is not transmitted.