ADTRAN 2 x E1 user manual Path Loss, Path Availability

61280004L2-1C

Section 2 Installation

Path Loss

The free space path loss is given by

Loss(dB) = 96.6 + 20 log10 f + 20log10D * 1.609344

where D is distance in kilometers f is operating frequency in GHz

A tabulation of various path loss is given below.

	2.4 GHz		2.4 GHz		5.8 GHz		5.8 GHz
Link Distance	Path Loss	Link Distance	Path Loss	Link Distance	Path Loss	Link Distance	Path Loss
(in miles)	(in dB)	(in miles)	(in dB)	(in miles)	(in dB)	(in miles)	(in dB)
1	104	13	126	1	112	13	134
2	110	14	127	2	118	14	135
3	114	15	128	3	121	15	135
4	116	16	128	4	124	16	136
5	118	17	129	5	126	17	136
6	120	18	129	6	127	18	137
7	121	19	129	7	129	19	137
8	122	20	130	8	130	20	138
9	123	21	130	9	131	21	138
10	124	22	131	10	132	22	139
11	125	23	131	11	133	23	139
12	126	24	132	12	133	24	139

Path Availability

The availability of a path can be expressed by:

availability = (1 - C x T x 2.5 x 10-6x f x (D x 1.609344)3 x 10-(F/10)) x 100% where C is the climate factor

T is the terrain factor

f is the frequency in GHz

D is the path length in kilometers

F is the fade margin in dB

Climate factors are given below.
	Climate
Climate	Factor
Very Dry	1/
	8
Temperate	1/
	4
Humid	1/
	2
Terrain factors are listed below.
	Terrain
Terrain	Factor
Smooth	4
Average	1
Mountainous	1/4

16 TRACER 2 x E1 User’s Manual