a.f.
audio frequency

audio-frequency
audiofrequência

band
band of frequency

beat
beat frequency

BFO
Beat Frequency Oscillator

changer
frequency changer

FM
frequency modulation

frequency
frequency adjustment

fundamental
fundamental harmonic frequency

HF
high frequency

high
high frequency

high-frequency
de alta frequência

IF
intermediate frequency

interruption
interruption frequency oscillator

LF
low frequency

master
master frequency

medium
medium frequency

rated
rated frequency

RF
radio frequency

RFID
Radio-frequency identification

shortwave
shortwave frequency

spatial
spatial frequency

transmitter
transmitter frequency

UHF
ultrahigh frequency

ultrahigh
ultrahigh frequency

VHF
Very High Frequency

video
video frequency