Yaesu System Fusion

System Fusion uses C4FM (4-level Frequency Shift Keying) modulation. It supports both analog FM and digital modes, making it backward compatible with existing analog repeaters.

D-STAR

D-STAR (Digital Smart Technologies for Amateur Radio) was developed by the Japan Amateur Radio League (JARL). It uses DQPSK modulation and is digital only.

Advantages of D-STAR

• Larger user base worldwide
• Better audio codec quality
• Wider range of data modes including GPS position reporting and text messaging

Advantages of System Fusion

• Analog backward compatibility — works on existing FM repeaters
• Both C4FM and FDMA modes supported

Which one should you choose?

The choice depends on regional availability of repeaters and personal preference. Check what repeaters are available in your area before making a decision.