My watch list
my.chemeurope.com  
Login  

Band III



Band III is the name of a radio frequency range within the very high frequency part of the electromagnetic spectrum.

Band III ranges from 174 to 230 MHz, and it is primarily used for radio and television broadcasting.

Additional recommended knowledge

Contents

Television

North America

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

Channel Frequency Range
7174-180 MHz
8180-186 MHz
9186-192 MHz
10192-198 MHz
11198-204 MHz
12204-210 MHz
13210-216 MHz

Europe

European Band III allocations vary from country to country, with channel widths of 7 or 8MHz. The standard channel allocations for most of Europe are 7 MHz wide and are as follows:

Channel Frequency Range
E5174.5-181.5 MHz
E6181.5-188.5 MHz
E7188.5-195.5 MHz
E8195.5-202.5 MHz
E9202.5-209.5 MHz
E10209.5-216.5 MHz
E11216.5-223.5 MHz
E12223.5-230.5 MHz

The Irish system is shown below.

Channel Frequency Range
D174-182 MHz
E182-190 MHz
F190-198 MHz
G198-206 MHz
H206-214 MHz
i214-222 MHz
J222-230 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

Block Centre Frequency
5A174.928 MHz
5B176.640 MHz
5C178.352 MHz
5D180.064 MHz
6A181.936 MHz
6B183.648 MHz
6C185.360 MHz
6D187.072 MHz
7A188.928 MHz
7B190.640 MHz
7C192.352 MHz
7D194.064 MHz
8A195.936 MHz
8B197.648 MHz
8C199.360 MHz
8D201.072 MHz
9A202.928 MHz
9B204.640 MHz
9C206.352 MHz
9D208.064 MHz
10A209.936 MHz
10B211.648 MHz
10C213.360 MHz
10D215.072 MHz
10N210.096 MHz
11A216.928 MHz
11B218.640 MHz
11C220.352 MHz
11D222.064 MHz
11N217.088 MHz
12A223.936 MHz
12B225.648 MHz
12C227.360 MHz
12D229.072 MHz
12N224.096 MHz
13A230.784 MHz
13B232.496 MHz
13C234.208 MHz
13D235.776 MHz
13E237.488 MHz
13F239.200 MHz

Worldwide Usage

In the UK and part of Ireland, Band III was originally used for monochrome 405-line television. However this was discontinued by the mid 1980s. Some European countries (including Ireland) 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.

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

See also

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Band_III". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE