Very high frequency | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Very_high_frequency


00:01:32 1 Propagation characteristics
00:03:15 2 Line-of-sight calculation
00:05:34 3 Antennas
00:07:22 4 Universal use
00:08:17 5 By country
00:08:26 5.1 Australia
00:12:12 5.2 New Zealand
00:13:45 5.3 United Kingdom
00:15:18 5.4 United States and Canada
00:21:27 5.4.1 VHF television
00:22:13 5.4.2 87.5&#8211;87.9 MHz
00:24:04 6 Unlicensed operation
00:24:45 7 See also



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SUMMARY
=======
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. 
Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF). 
Common uses for radio waves in the VHF band are DAB/DAB+ and FM radio broadcasting, television broadcasting, two way land mobile radio systems (emergency, business, private use and military), long range data communication up to several tens of kilometers with radio modems, amateur radio, and marine communications. Air traffic control communications and air navigation systems (e.g. VOR & ILS) work at distances of 100 kilometres (62 mi)  or more to aircraft at cruising altitude.
In the Americas and many other parts of the world, VHF Band I was used for the transmission of analog television. As part of the worldwide transition to digital terrestrial television most countries require broadcasters to air television in the VHF range using digital rather than analog format.