Adtran TRACERT1L7 Manual Do Utilizador
61280.003L1-1B
P
AGE
23
4/12/99
I
NSTALLATION
P
ATH
A
VAILABILITY
The availability of a path can be expressed by:
availability = (1 - C x T x 2.5 x 10
-6
x f x D
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 miles
F is the fade margin in dB
T is the terrain factor
f is the frequency in GHz
D is the path length in miles
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 ...........
Average .................... 1
Mountainous ...........
1
/
4
The nominal received signal level is -60 dBm. For help in link
planning, use the path loss calculation worksheet below.
planning, use the path loss calculation worksheet below.
- 91 dBm
Minimum Signal Power
+ _______
Transmitter Feedline Loss
- _______
Transmitter Antenna Gain
+ _______
Path Loss
- _______
Receiver Antenna Gain
+ _______
Receiver Feedline Loss
+ _______
Required Fade Margin
= _______
(dBm) Transmitter Power Setting