ARRL Technician Practice Exam 2025 – Complete Prep Guide

Single sideband (SSB) modulation is known for its narrow bandwidth compared to frequency modulation (FM). This characteristic is crucial for voice transmissions, especially in amateur radio and communications where spectrum efficiency is important.

The primary advantages of SSB's narrower bandwidth include allowing more simultaneous conversations within the same frequency spectrum, reducing the likelihood of interference, and utilizing power more efficiently. By occupying less bandwidth, SSB can transmit more channels over a given frequency range, which is particularly beneficial in crowded bands. This makes SSB the preferred choice for long-distance communications, where conserving bandwidth is essential.

While there are merits to FM, such as its resistance to noise and the clarity it can provide in certain conditions, SSB’s efficiency in bandwidth usage stands out as its primary advantage for voice transmissions.