Redline Communications Inc. AN30 Manuel D’Utilisation

 

 

AN-30 System User Manual 

 

 

 
The first step in installing the AN-30 system is to conduct a general site survey.  
Although the installation steps are relatively straightforward, they do involve some 
construction and electrical work, which is best performed by a professional installer.   
 
 
The following site survey steps should be followed: 
 
Determine the optimum location. The first key step in the deployment exercise is to 
determine and identify building candidates that can be used to support the link.  A critical 
parameter to consider is the range at which the two terminals are required to operate. 
Range performance is determined by empirical formulas that consider a number of 
equipment and environmental factors described later in this manual.  Ensure that the 
installation sites meet these range performance requirements before moving to the next 
step. You may use Redline’s Link Budget Tool to determine the expected performance of 
the link.  The Link Budget Tool can be obtained by contacting your Redline certified 
partner or system integrator. See Section 10.3.1 on page 66 for more information. Verify 
the accuracy of any building drawings/blueprints that may be available. The 
installation process may require penetrating the building to run the IF cable between the 
outdoor and indoor units. In this regard, it is imperative that the blueprints and/or 
drawings of the building are up to date and accurate.  It may also be possible for the IF 
cable to be installed on the outside of the building leading to the antenna location on the 
roof of the building. 
 
Identify the best path for the link. For maximum performance, it is recommended to 
mount the antenna in a location where there is line of sight to the remote terminal. If 
possible, the antenna should be positioned such that there is maximum clearance within 
the first Fresnel zone of the direct path. The best means of achieving Fresnel zone 
clearance is to mount the antennas as high as possible, on either a tall building or tower, 
as shown in Figure 8 (Vertical mount system is shown).   
 
The AN-30 system is also designed to operate in non-line-of-sight (NLOS) conditions, as 
a result of the OFDM technology incorporated in the platform. Under NLOS conditions, 
the best method of obtaining a proper RF link is to evaluate different antenna orientations 
and choosing the one that results in the best Signal to Noise (SINADR) ratio and highest 
Received Signal Strength (RSSI) value.  Often, this can be achieved by introducing an RF 
multipath condition by orienting the antennas towards a structure in sight of both the 
local and remote antennas. If the obstruction in the path is not exceptionally high, it may 
be possible to aim both antennas near the top of the obstruction.  With the use of OFDM 
in the Redline system, any additional multipath signals introduced will provide additional 
opportunities for an improved link.

 

 
 

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