Band III: Difference between revisions
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corrected my own error of added l-band info to a band iii article |
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Note: Canada use slightly different central frequencies for L-band DAB while in many European countries DAB is limited part of Band III due to television and mobile two way radio using the rest. |
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==Worldwide Usage== |
==Worldwide Usage== |
Revision as of 19:21, 4 November 2006
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.
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
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.
In the United States, use of the band for colour television broadcasts is still widespread.