MRV Communications TS5000/XXX (TS5000G/XYZ/V** ユーザーズマニュアル

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  

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1.  Determine the number of surfaces the beam transits or is reflected 

from, the reflectivity of each surface, and 
condensation/precipitation collection areas. 

2.  Use the data below to determine whether the light beam 

attenuation is acceptable. 

4% attenuation for each surface of light reflection. 
15% attenuation for a double pane window. 
Attenuation due to tint in windowpane must be taken into 
consideration in choosing the right TereScope model. (The % 
attenuation depends on the tint and must be measured.) 

3.  Ensure that the angle of incidence

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 of the beam striking the 

windowpane is between 1º and 45º. 

 

On high buildings, for indoor window installation, the user should consider 
that occasionally the window-cleaning elevator might block the link beam. 

Figure 2.12 shows the arrangement for transmitting through a window 

 

                                                

 

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Angle which the light beam makes with the perpendicular to the windowpane