User's Manual

TROUBLE-SHOOTING
SpotCell® 100 Series 27
8. Information: Residential (or 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
 Mount the DU and CU in a back-to-back manner.
 It is recommended to use 50 meters of cable in between the DU and CU if
possible in an effort to vertically and horizontally separate the system units.
9. Information: Proper alignment rotation
Action: Make sure the DU is rotated once completely within the area available for
rotation, and then move through the same rotation again. DU alignment is based on
optimizing the direction the DU is facing after initially establishing the range of signal
available by rotating the DU in a circle. Once the DU has been rotated in a circle and
established the level of signal available, it now sets a threshold based on the
surroundings to determine when the LED will illuminate green. If the DU is not
pointing in a direction that is within a certain range of the highest signal it
encountered since being in ‘Install’ mode, the LED will not turn green. Additionally,
the LED will not illuminate green if a minimum signal level is not achieved during the
initial rotation.