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Encyclopedia > Band III

Band III is the name of a radio frequency range within the very high frequency part of the electromagnetic spectrum. Rough plot of Earths atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including radio waves. ... Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... Legend: γ = Gamma rays HX = Hard X-rays SX = Soft X-Rays EUV = Extreme ultraviolet NUV = Near ultraviolet Visible light NIR = Near infrared MIR = Moderate infrared FIR = Far infrared Radio waves: EHF = Extremely high frequency (Microwaves) SHF = Super high frequency (Microwaves) UHF = Ultra high frequency VHF = Very high frequency HF = High...


Band III ranges from 174 to 230 MHz, and it is primarily used for radio and television broadcasting. A megahertz (MHz) is one million (106) hertz, a measure of frequency. ...

Contents

Television

The band is subdivided into seven channels for television broadcasting, each occupying 6 MHz.

Channel Frequency Range
7 174-180 MHz
8 180-186 MHz
9 186-192 MHz
10 192-198 MHz
11 198-204 MHz
12 204-210 MHz
13 210-216 MHz

Radio

The band has only come into use for radio broadcasting within the last decade, and is used for Digital Audio Broadcasting. It is subdivided into a number of frequency blocks Digital Audio Broadcasting or DAB is a technology for broadcasting audio programming in digital form that was designed in the late 1980s but which is now being introduced in many countries. ...

Block Centre Frequency
5A 174.928 MHz
5B 176.640 MHz
5C 178.352 MHz
5D 180.064 MHz
6A 181.936 MHz
6B 183.648 MHz
6C 185.360 MHz
6D 187.072 MHz
7A 188.928 MHz
7B 190.640 MHz
7C 192.352 MHz
7D 194.064 MHz
8A 195.936 MHz
8B 197.648 MHz
8C 199.360 MHz
8D 201.072 MHz
9A 202.928 MHz
9B 204.640 MHz
9C 206.352 MHz
9D 208.064 MHz
10A 209.936 MHz
10B 211.648 MHz
10C 213.360 MHz
10D 215.072 MHz
10N 210.096 MHz
11A 216.928 MHz
11B 218.640 MHz
11C 220.352 MHz
11D 222.064 MHz
11N 217.088 MHz
12A 223.936 MHz
12B 225.648 MHz
12C 227.360 MHz
12D 229.072 MHz
12N 224.096 MHz
13A 230.784 MHz
13B 232.496 MHz
13C 234.208 MHz
13D 235.776 MHz
13E 237.488 MHz
13F 239.200 MHz

Worldwide Usage

In Europe, Band III was originally used for monochrome 405-line television. However this was largely discontinued in the mid 1980s. Some European countries still use Band III for higher definition colour television, although this is now being gradually phased out. The use of the band for Digital Audio Broadcasting is now being widely adopted. Something which is monochromatic has a single color. ... 405 line is the name of a monochrome analogue television broadcasting system in operation in the UK between 1936 and 1985, and also used for some time in Ireland and Hong Kong. ... Digital Audio Broadcasting or DAB is a technology for broadcasting audio programming in digital form that was designed in the late 1980s but which is now being introduced in many countries. ...


In the United States, use of the band for colour television broadcasts is still widespread.


See Also


  Results from FactBites:
 
Biophysical Journal: effect of ligand dynamics on heme electronic transition band III in myoglobin, The (1182 words)
The time dependence of the band III shift by ~120 cm^sup -1^ was shown to be strongly nonexponential and modeled with a stretched exponential, exp[-kt]^sup (beta)^, with stretching exponents (beta) in the range of 0.03-0.18, depending on the fit procedure.
The sensitivity of the intensity, position, and width of band III to the extent of iron-heme displacement was recently analyzed in a theoretical paper by Stavrov (2001).
There it was concluded that the intensity of band III should be used as a marker for the iron displacement, and not the position or the width, as the latter two may also be affected by other factors.
Deep Groove Encyclopedia - Gap Band (437 words)
Of all the groups to adopt a Parliafunkadelicment-styled identity in the midst of the Funk Mob's dominance, none was as effective, or controversial, as the Gap Band.
The trio of brothers from Tulsa, Oklahoma -- Charlie, Robert and Ronnie -- tore up the charts with some of the hardest funk of the 80s, but the influence of the P was as clear as crystal glass.
Factor in their principled commitment to funk (refusing to go electro when everyone else was running for the drum machine) and Charlie's rep as one of the most influential randb singers of the last 20 years and you've got to recognize them as one of the last great soul bands.
  More results at FactBites »


 

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