Welcome to the Christchurch New Zealand Wireless Community Webpage |
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Here is a handy chart to work out the RF power out put of your wireless device most card are rated in dbm and this will covert in to watts.
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| Attenuation of Coax cable in the VHF/UHF/Microwave Amateur and ISM Bands |
| Cable Type |
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144 MHz |
220 MHz |
450 MHz |
915 MHz |
1.2 GHz |
2.4 GHz |
5.8 GHz |
| RG-58 |
dB/ 100 ft |
6.2 |
7.4 |
10.6 |
16.5 |
21.1 |
32.2 |
51.6 |
| dB/ 100 m |
(20.3) |
(24.3) |
(34.8) |
(54.1) |
(69.2) |
(105.6) |
(169.2) |
| RG-8 |
dB/ 100 ft |
1.5 |
1.8 |
2.7 |
3.9 |
4.8 |
6.8 |
10.8 |
| dB/ 100 m |
(4.9) |
(5.9) |
(8.9) |
(12.8) |
(15.7) |
(22.3) |
(35.4) |
| LMR-240 |
dB/ 100 ft |
3.0 |
3.7 |
5.3 |
7.6 |
9.2 |
12.9 |
20.4 |
| dB/ 100 m |
(9.8) |
(12.1) |
(17.4) |
(24.9) |
(30.2) |
(42.3) |
(66.9) |
| RG-213/214 |
dB/ 100 ft |
2.8 |
3.5 |
5.2 |
8.0 |
10.1 |
15.2 |
28.6 |
| dB/ 100 m |
(9.2) |
(11.5) |
(17.1) |
(26.2) |
(33.1) |
(49.9) |
(93.8) |
| Belden 9913 |
dB/ 100 ft |
1.6 |
1.9 |
2.8 |
4.2 |
5.2 |
7.7 |
13.8 |
| dB/ 100 m |
(5.2) |
(6.2) |
(9.2) |
(13.8) |
(17.1) |
(25.3) |
(45.3) |
| LMR-400 |
dB/ 100 ft |
1.5 |
1.8 |
2.7 |
3.9 |
4.8 |
6.8 |
10.8 |
| dB/ 100 m |
(4.9) |
(5.9) |
(8.9) |
(12.8) |
(15.7) |
(22.3) |
(35.4) |
| 3/8" LDF |
dB/ 100 ft |
1.3 |
1.6 |
2.3 |
3.4 |
4.2 |
5.9 |
8.1 |
| dB/ 100 m |
(4.3) |
(5.2) |
(7.5) |
(11.2) |
(13.8) |
(19.4) |
(26.6) |
| LMR-600 |
dB/ 100 ft |
0.96 |
1.2 |
1.7 |
2.5 |
3.1 |
4.4 |
7.3 |
| dB/ 100 m |
(3.1) |
(3.9) |
(5.6) |
(8.2) |
(10.2) |
(14.4) |
(23.9) |
| 1/2" LDF |
dB/ 100 ft |
0.85 |
1.1 |
1.5 |
2.2 |
2.7 |
3.9 |
6.6 |
| dB/ 100 m |
(2.8) |
(3.6) |
(4.9) |
(7.2) |
(8.9) |
(12.8) |
(21.6) |
| 7/8" LDF |
dB/ 100 ft |
0.46 |
0.56 |
0.83 |
1.2 |
1.5 |
2.3 |
3.8 |
| dB/ 100 m |
(1.5) |
(2.1) |
(2.7) |
(3.9) |
(4.9) |
(7.5) |
(12.5) |
| 1 1/4" LDF |
dB/ 100 ft |
0.34 |
0.42 |
0.62 |
0.91 |
1.1 |
1.7 |
2.8 |
| dB/ 100 m |
(1.1) |
(1.4) |
(2.0) |
(3.0) |
(3.6) |
(5.6) |
(9.2) |
| 1 5/8" LDF |
dB/ 100 ft |
0.28 |
0.35 |
0.52 |
0.77 |
0.96 |
1.4 |
2.5 |
| dB/ 100 m |
(0.92) |
(1.1) |
(1.7) |
(2.5) |
(3.1) |
(4.6) |
(8.2) |
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Channels for IEEE 802.11b |
Channel Identifier Frequency in MHz Regulatory Domains
Americas (-A) EMEA (-E) Israel (-I) China (-C) Japan (-J)
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Channel Identifier Frequency in MHz Regulatory Domains
Americas (-A) EMEA (-E) Israel (-I) China (-C) Japan (-J)
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Channels for IEEE 802.11b
Channel Identifier Frequency in MHz Regulatory Domains
Americas (-A) EMEA (-E) Israel (-I) China (-C) Japan (-J)
1 |
2412 |
X |
X |
- |
X |
X |
2 |
2417 |
X |
X |
- |
X |
X |
3 |
2422 |
X |
X |
X |
X |
X |
4 |
2427 |
X |
X |
X |
X |
X |
5 |
2432 |
X |
X |
X |
X |
X |
6 |
2437 |
X |
X |
X |
X |
X |
7 |
2442 |
X |
X |
X |
X |
X |
8 |
2447 |
X |
X |
X |
X |
X |
9 |
2452 |
X |
X |
X |
X |
X |
10 |
2457 |
X |
X |
- |
X |
X |
11 |
2462 |
X |
X |
- |
X |
X |
12 |
2467 |
- |
X |
- |
- |
X |
13 |
2472 |
- |
X |
- |
- |
X |
14 |
2484 |
- |
- |
- |
- |
X |
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