🔍 Key Concepts
• SSB (Single Sideband) vs standard AM and FM voice emissions
• Meaning of emission designators like A3E, F3E, J3E, A1A per ITU radio regulations
• What "suppressed carrier" and "one sideband" mean in radiotelephone transmissions
💭 Think About
• First, match each emission designator (A3E, F3E, J3E, A1A) with the type of modulation it represents (AM voice, FM voice, SSB, CW, etc.).
• Next, think about which emission type is typically used for HF radiotelephone (SSB) on marine bands.
• Then, check which option correctly describes both the emission code and its technical description (how many sidebands, what happens to the carrier).
✅ Before You Answer
• Verify which emission designator corresponds to single-sideband suppressed-carrier radiotelephony used on marine HF SSB sets.
• Confirm that A3E is standard double-sideband AM with full carrier, and F3E is FM voice, so see if any option mislabels these.
• Check that A1A is associated with on-off keyed CW (Morse), not with normal voice SSB operation.