analog Pulse Frequency Modulation
frequency modulation coded pulse signal
frequency modulation stepped pulse signal
integral pulse frequency modulation
pulse frequency modulation control system
Pulse Frequency Modulation PFM
pulse code modulation frequency modulation
pulse frequency modulation magnetic tape record type strong-motion instrument
alpha pulse height analysis
alpha pulse counting assembly
All-Fiber Pulse Compressor
air-cored pulse transformer
airborne pulse search radar
airborne pulse Doppler radar
air pressure pulse in train passing