low frequency (LF)

pulse repetition frequency (PRF) / pulse-repetition frequency

very low frequency (VLF) radio

low-frequency channel

low-pulse repetition frequency

low-pulse repetition frequency radar

low-pulse repetition frequency waveform

very low frequency (VLF)

low-RCS target / low-radar-cross-section target

low flying aircraft / low-flying aircraft

low-flying, low-speed drone

common frequency

doppler frequency shift

fixed frequency channel

frequency

frequency and directional chart

frequency band

frequency intelligence

frequency modulated (FM)

frequency modulation (FM)

frequency range (band)

frequency response

frequency, intensity, time, type (FITT)

frequency-hopping mode

guarded frequency

high frequency (HF)

high frequency direction finder

high frequency over-the-horizon (HF OTH) radar

high-frequency 'X-band' system

intermediate frequency

operating frequency

operational frequency

preset frequency