ADTRAN 6000 Series system manual Other Considerations, Path Availability

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

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

	Min. Antenna Height	Min. Antenna Height
Path Length	at 2.4 GHz	at 5.8 GHz
(kilometers)	(meters)	(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

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

A = [1 – (2.5 × 10–6)abfd3(10–F⁄10)] × 100%

where the parameters are

aterrain factor

bclimate factor

fcarrier frequency (GHz)

d path length (miles)

F fade margin (dB)

or

A = [1 – (6.00 × 10–7)abfd3(10–F⁄10)] × 100%

(%)

(%)

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