ADTRAN TRACER 6000 SERIES Guia de Resolução de Problemas descarregar pdf (Página 27)

TRACER 6000 Series Integrated System Manual Section 2 Microwave Path Engineering Basics

7. OTHER CONSIDERATIONS

Path Availability

The path availability of a wireless link is a metric that expresses the fractional amount of time a link is

available over some fixed amount of time, and depends on several factors. Path availability is expressed as

where the parameters are

a terrain factor

b climate factor

f carrier frequency (GHz)

d path length (miles)

F fade margin (dB)

Table 11. Minimum Antenna Height for Given Path Lengths (km and m)

Path Length

(kilometers)

Min. Antenna Height

at 2.4 GHz

(meters)

Min. Antenna Height

at 5.8 GHz

(meters)

2 8.0 5.1

4 11.4 7.4

6 14.2 9.3

8 16.8 11.1

10 19.2 12.8

14 23.8 16.3

16 26.1 18.2

18 28.5 20.0

20 30.9 22.0

22 33.3 24.0

24 35.9 26.1

26 38.4 28.3

28 41.1 30.6

30 43.9 32.9

32 46.7 35.4

34 49.6 38.0

36 52.6 40.6

A12.510

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