User's Manual

INSTALLATION
10 SpotCell® 100 Series
8. Alignment Step 2. Repeat the above rotation a second time. This time monitor the
color of the LED. The LED color is an indication of the signal strength the DU is
receiving from the wireless basestation tower.
Stop the rotation each time the LED is green and note the direction the DU is facing
when it is GREEN (the LED may turn green once or multiple times). The GREEN
direction is the direction the DU must face when installed for best system
performance.
When multiple GREEN locations are present mount the DU facing the direction
where the LED was green for the longest period of time during this second rotation.
9. For dual band systems (SC141/142) set the band select switch to 1900 MHZ and,
with the 1900 MHZ DU, repeat steps 7 and 8 to align the second DU.
10. It is recommended that various outside roof and exterior wall locations, and locations
within the building be tested to identify the best DU location. The LCD display on the
DU will help you identify the location where the signal strength is strongest. The LCD
display on the CU indicates the signal strength that the DU is receiving. figure 3.6
shows 5 bars of signal strength. Five bars is maximum.
Figure 3.6: Displayed signal strength
Mount the DU in the location that has the highest indicated signal level. Then aim the
DU in the direction that provides the highest indicated signal level on the CU LCD
display.
Note: On the upper floors of tall buildings, it may be necessary to tilt the DU down to get the
strongest signal.
11. Proceed to Chapter for mounting instructions once the DU location has been
optimized.