Signal Booster Types and Definitions

Class A:

• Uses digital filters (DSP) in order to achieve narrow BW
• Used to be defined as passing only individual channels (12.5 or 25 kHz), but recent FCC rule change relaxed it to 75 kHz
• In order to use DSP, it has to down-convert RF signals to very low frequencies.
• Down-conversion and narrow filtering process can result in long Group Delay times – potentially causing Time Domain Interference
• Extra hardware means higher unit cost

Class B:

• Relatively Simple: filters and amps
• Typically, will use analog filters with BW between a few hundred kHz and several MHz
• Typical gain up to 80 dB
• Typical maximum output power 1~2 W (30~33 dBm)
• Extremely low Group Delay Distortion and end-to-end delay: Digital system compatible