User Manual
Table Of Contents
TROUBLE-SHOOTING
32 SpotCell
®
2500Xe
5. Status: The coverage area around the CU suddenly shrinks after a long period of
reliable operation.
Action: This is most likely due to man made environmental influences such as a
large building being erected somewhere in between the DU and the location the DU
is receiving a signal from. Repeating the install procedure with the DU in its current
position may improve system performance (i.e. re-aligning it in the direction that
provides greater signal strength). If this does not help, the DU may have to be
physically repositioned at a different location; going through the install procedure
starting at Choosing a location for the DU on page 11, is necessary at this point.
6. Information: Remote installation SpotCell characteristics.
In order for the SpotCell system to function, there are two basic parameters that
must be met. The DU must receive a minimum amount of wireless signal, and a
physical environment that blocks wireless signals must be in between the DU and
CU (i.e. a wall).
If the DU is not receiving an adequate signal, the system will not work, or, it will work
but provide a very limited area around the CU in which a cell phone will function. In
this instance, it may be possible that only one cell phone will be capable of using the
system at a time. This is typical of applications that are on the fringe, or outside of a
wireless providers advertised coverage area. Improved performance will typically
only be attained by moving the DU to a higher location.
7. Information: Building installations that do not provide for brick, concrete, metal,
or other dense material between the DU and CU.
Action: In this situation it is possible that the signal emitted by the DU will be received
by the CU. This will result in the system lowering the power of the signal it is emitting;
and therefore the area around the CU in which a cell phone will function will become
smaller. To improve performance in this scenario, it is important to:
Maximize the height of the DU
Separate the DU and CU horizontally as much as possible (within the maximum
cable limits as shown in Table 1, Maximum cable length for connecting units on
page 8).
Mount the DU and CU in a back-to-back manner.