Radio:

• adaptive radio
• airborne radio relay
• air-ground radiotelephone service
• allcall
• amateur service
• anycall
• atmospheric noise
• automated radio
• automatic link establishment (ALE)
• automatic message exchange (AME)
• automatic sounding
• brick
• broadcasting-satellite service
• broadcasting satellite space station
• broadcasting service
• broadcasting station
• broadcast operation
• capture effect
• carrier synchronization
• cellular mobile
• clear channel
• closed circuit
• combat-net radio (CNR)
• connectivity exchange (CONEX)
• controller
• cross-band radiotelegraph procedure
• coverage
• dead space
• deemphasis
• detector
• deviation ratio
• diffraction region
• digital selective calling (DSC)
• directed net
• direction finding
• discriminator
• distance measuring equipment (DME)
• diversity reception
• diversity transmission
• duplex operation
• emergency locator transmitter (ELT)
• emergency position-indicating radiobeacon station
• emphasis
• feeder link
• FM blanketing
• FM improvement factor
• FM improvement threshold
• Fresnel zone
• harmful interference
• heterodyne repeater
• homing
• horn
• indefinite call sign
• inside plant
• k-factor
• link
• linking protection (LP)
• link quality analysis (LQA)
• maximum usable frequency (MUF)
• meaconing
• mean power [of a radio transmitter]
• medium
• message heading
• message part
• meteor burst communications
• multi-satellite link
• narrowband radio voice frequency (NBRVF)
• near-vertical-incidence skywave
• net control station (NCS)
• net operation
• net radio interface (NRI)
• off-the-air
• off-the-air monitoring
• on-the-air
• path
• PBER
• PCS
• peak envelope power (of a radio transmitter) [PEP, pX, PX]
• pilot
• precipitation static (p-static)
• preemphasis
• preemphasis improvement
• preemphasis network
• preliminary call
• primary service area
• propagation mode
• propagation path obstruction
• protection interval (PI)
• push-to-talk operation
• quadruple diversity
• query call
• radiation
• radio
• radio and wire integration (RWI)
• radio channel
• radio common carrier (RCC)
• radiocommunication
• random access discrete address (RADA)
• reflecting layer
• rural radio service
• rural subscriber station
• scan-stop lockup
• ship Earth station
• shortwave
• smooth Earth
• sounding
• sporadic E propagation
• spurious response
• stereophonic sound subcarrier
• stressed environment
• sudden ionospheric disturbance (SID)
• sunspot
• surface wave
• tail circuit
• terrestrial radiocommunication
• terrestrial station
• transmitter power output rating
• traveling wave
• TRI-TAC equipment
• vestigial sideband (VSB) transmission
• white area
• wildcard character