User manual

Page 26
Before using the DVM, set its output to millivolts. Dividing the RSSI
millivolt output by 10 will provide the actual receive signal strength
calculation. For example, a DVM millivolt reading of 450 mV is
equivalent to -45 dBm.
Align the fine azimuth axis. Use the hexagonal wrench to adjust the Azimuth Fine
Adjustment Screw (). Be sure to sweep the complete range of the azimuth in
order to determine the maximum received signal strength position.
When the optimum axis is achieved, tighten both Azimuth
Adjustment Lock Bolts ().
Align the fine elevation axis. Use the hexagonal wrench to adjust the Elevation Fine
Adjustment Screw (). Be sure to sweep the complete range of the elevation in
order to determine the maximum received signal strength position.
When the optimum axis is achieved, tighten both Elevation
Adjustment Lock Bolts ().
Perform Steps 0 and 0 for the remote paired ODU.
Repeat Steps 0 and 0 once again for the local paired ODU.
Use the DVM to verify maximum received signal strength on both local and remote
ODUs. For best performance, measured RSSI should be within ±4 dB of the
calculated value.
Once the optimum position has been achieved for the ODU node pair, tighten the
azimuth and elevation adjustment lock bolts (, ) on both ODUs, being very
careful not to move the FibeAir 70 ODU when tightening.
Use the DVM to verify that the received signal strength has not changed on either
local or remote ODUs after final tightening of the brackets.
Figure 2-5 shows the FibeAir 70 appearance after it has been completely installed.
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