Sub10 Systems Ltd LIB-V1000E Manuel D’Utilisation
Liberator-V1000 Manual
Rev 00v01
Page 13
Sub10 Systems
3 SITE PLANNING
All installers must perform a full site inspection and plan carefully prior to the physical installation of a Liberator-
V1000 link.
This preparation must include:
V1000 link.
This preparation must include:
• Evaluating the most appropriate location for the installation of the terminal.
• Identifying an appropriate mounting structure (wall or mast) for each terminal.
• Identifying an appropriate mounting structure (wall or mast) for each terminal.
•
Planning the cable routing from the network component to the terminal.
3.1 Terminal location
When selecting the best terminal location the following factors should be considered:
• Accessibility (e.g. How to gain access to a roof)
• Type of mounting (e.g. wall or pole)
• Grounding connection point
• Cable runs (max. 100 m / 328 ft)
• Human safety: Exposure to Non-Ionising Radiation - The Liberator-V1000 terminal should be mounted so
• Type of mounting (e.g. wall or pole)
• Grounding connection point
• Cable runs (max. 100 m / 328 ft)
• Human safety: Exposure to Non-Ionising Radiation - The Liberator-V1000 terminal should be mounted so
that it is always separated from the location of any human being by a distance of at least 1 metre.
3.2 Line of sight
To ensure a clear line of sight (LOS), there must be no obstructions between the two terminal locations: the first
Fresnel Zone should be completely clear of obstacles, see
Fresnel Zone should be completely clear of obstacles, see
Figure 14
with n=1. The required clearance can be
established visually, or by using Table 1, which gives the worst-case clearance at the centre-point of the link. This
table is valid for distances greater than about 4 metres from the radio terminal. Note that this is the minimum
clearance distance with perfect antenna alignment. It is recommended to use the widest clearance distance around
the LOS path as is practically possible. See Figure 23 for clearance required at close proximity to the antenna.
table is valid for distances greater than about 4 metres from the radio terminal. Note that this is the minimum
clearance distance with perfect antenna alignment. It is recommended to use the widest clearance distance around
the LOS path as is practically possible. See Figure 23 for clearance required at close proximity to the antenna.
Table 1 - Fresnel zone clearance for different ranges at 60GHz
Link
Distance
Boundary
Diameter (2F
1
)
100 m
328 ft
0.7 m
2.3 ft
200 m
656 ft
1.0 m
3.3 ft
400 m
1312 ft
1.4 m
4.6 ft
600 m
1968 ft
1.7 m
5.6 ft
800 m
2625 ft
2.0 m
6.6 ft
1000 m 3280 ft
2.2 m
7.3 ft
Figure 14 - Fresnel Zone clearance at 60GHz