Nortel WLAN Security Switch 2361 Guide d'installation télécharger pdf (Page 83)

Appendix 83

Avaya WLAN 2332 Series Outdoor Solution Guide

To minimize path loss effects, you can either increase the transmit power, increases the system gain, decrease

the operating frequency or increase the receiver sensitivity on the other end of the wireless communications

link. In addition, path loss increases by a factor of approximately 6 dB for every doubling of frequency or path

distance. This factor is significant because it means that a doubling of the antenna or system gain, an increase

of 3 dB, will not double the propagation distance of the signal. To double the usable coverage area or path

distance, the antenna or system gain would have to increase by a factor of four, which equates to an increase of

6 dB.

Table 17: Path loss in [dB] for loss coefficient of n=2

Frequency (MHz)

Distance

(m)

2400 2450 2500 5150 5250 5350 5470 5725 5850

10 -60.0 -60.2 -60.4 -66.7 -66.8 -67.0 -67.2 -67.6 -67.8

50 -74.0 -74.0 -74.4 -80.7 -80.8 -81.0 -81.2 -81.6 -81.8

100 -80.0 -80.0 -80.4 -86.7 -86.8 -87.0 -87.2 -87.6 -87.8

150 -83.6 -83.6 -83.9 -90.2 -90.4 -90.5 -90.7 -91.1 -91.3

200 -86.1 -86.1 -86.4 -92.7 -92.9 -93.0 -93.2 -93.6 -93.8

250 -88.0 -88.0 -88.4 -94.6 -94.8 -95.0 -95.2 -95.6 -95.7

300 -89.4 -89.6 -89.9 -96.2 -96.4 -96.6 -96.7 -97.1 -97.3

350 -90.9 -90.9 -91.3 -97.6 -97.7 -97.9 -98.1 -98.5 -98.7

400 -92.1 -92.1 -92.4 -98.7 -98.9 -99.1 -99.2 -99.6 -99.8

500 -94.0 -94.0 -94.4 -100.7 -100.8 -101.0 -101.2 -101.6 -101.8

750 -97.5 -97.5 -97.9 -104.2 -104.3 -104.5 -104.7 -105.1 -105.3

1000 -100.0 -100.2 -100.4 -106.7 -106.8 -107.0 -107.2 -107.6 -107.8

1 2 ... 78 79 80 81 82 83 84 85 86 87 88 ... 119 120

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Nortel WLAN Security Switch 2361 Guide d'installation Page 83