🔍 Key Concepts

• Single-sideband (SSB) modulation and the difference between upper and lower sidebands • How filters (especially band‑pass or sideband filters) are used to remove unwanted frequency components • The function of a double balanced mixer (it suppresses the carrier and isolates mixing products, but does it select a specific sideband?)

💭 Think About

• In SSB transmission, after generating both sidebands and carrier (like in AM), what practical method is commonly used to remove one of the sidebands? • Which device is better suited to physically attenuate or reject a specific frequency range: a mixer or a filter? • Look at the wording of each choice: which option actually describes a process that would get rid of the lower sideband and leave the upper sideband available?

✅ Before You Answer

• Confirm which sideband (upper or lower) you are trying to keep, not just which one you want to remove. • Check whether a double balanced mixer is normally used for carrier suppression/frequency conversion or for sideband selection. • Verify that the correct choice clearly states: "pass" the desired sideband and "block" or "eliminate" the unwanted sideband.