MRV Communications TS700/G, TS700/155 SiteSurvey, Line of Sight, Orientation, Location & Range

M R V C o m m u n i c a t i o n s , I n c . – I n s t a l l a t i o n M a n u a l

Chapter

2

SiteSurvey

The first step before everyinstallation is to visit the sites to be linked. in order to make sure that the connection is feasible, to find out potential obstacles or difficulties and to decide on the location and mounting points of the transceivers.

Line of Sight

A necessary condition for linking two distant buildings is that the two mounting sites must be within clear sight of each other.

Pay attention to:	%	Growing	vegetation and increasing
		foliage during spring
	% Building sites (cranes movements, etc.)
	%	Chimneys	(intervening smoke can
		interrupt the beam from time to time).

Orientation

Direct sunlight can overload the airlink receiver to saturation level. Avoid, as far as possible, the East-West direction for the link.

Note

In case this is not possible, the surrounding buildings could shield the transceiver from the direct sunlight otherwise outages lasting several minutes (depending on the time of the year and the angle of the sun) could occur. The system will fully recover once the sun is out of the receiver field-of-view.

Location & Range

1.The mounting of the transceiver must be very rigid (preventing the installation from twists of even as little as 1 mrad). The key to the required rigidity is to attach the mounting accessories on strong mounting points such as:

-Stiff building structures

-Concrete or reinforced concrete surfaces

17