VHF
Lower broadcast channels
VHF stands for very high frequency, a range of radio waves used for FM radio, television broadcasts, aviation communication, and marine radio.
VHF signals travel in straight lines and don't bend around obstacles or the Earth's curvature, limiting their range to roughly line-of-sight distances: We lost the VHF signal once the plane dropped below the horizon.
Rate of recurrence
- megahertzOne million oscillations per second
- wavelengthSpatial repetition interval
- radio wavesLow-frequency electromagnetic radiation
- propagationAct of spreading widely
line-of-sight · modulation · FM · amplitude · carrier wave · bandwidth · spectrum · transceiver
Broadcast viewing device
- antennaBroadcast signal receiver
- transmitterSignal-emitting device
- channelPassage for transmission
- analogComparable equivalent
digital · signal · receiver · network · programming · bandwidth · coverage · aerial
Seafaring emergency responders
- maydayRadio emergency signal
- distressSevere anxiety or suffering
- shipSeagoing transport vessel
- vesselReceptacle for contents
yacht · sailing · navigation · radar · buoy · harbor · nautical · captain
frequency
Rate of recurrence
- megahertzOne million oscillations per second
- wavelengthSpatial repetition interval
- radio wavesLow-frequency electromagnetic radiation
propagation · line-of-sight · modulation · FM · amplitude · carrier wave · bandwidth · spectrum · transceiver · repeater
television
Broadcast viewing device
- antennaBroadcast signal receiver
- transmitterSignal-emitting device
- channelPassage for transmission
analog · digital · signal · receiver · network · programming · bandwidth · coverage · aerial · rooftop
coastguard
Seafaring emergency responders
vessel · yacht · sailing · navigation · radar · buoy · harbor · nautical · captain · sailor
airband
Aircraft radio frequencies
- transponderSignal-activated transmitter
- squawkHarsh grating bird cry
- ATCAviation traffic service
tower · approach · departure · cockpit · radar · altimeter · glideslope · datalink · avionics · navigation
ham radio
Licensed hobbyist broadcasting
- repeaterSignal-extending transmitter
- transceiverDual-function communication device
- handheldDesigned for palm use
walkie-talkie · simplex · duplex · call sign · PTT · squelch · Kenwood · antenna · portable · mobile
- broadcasting rulesFCC, broadcast license, broadcast spectrum, broadcasting license, license renewal
- TV bands
- broadcastingbroadcasting, TV, radio, television, news
- Electromagnetic Wavesvisible light, radio waves, infrared light, ultraviolet light, gamma rays
- radioFM radio, crystal set, AM radio, radio station, radio broadcast
- Television Historygolden age, broadcast networks, network television, color TV, live broadcasts