Nokia MetroHopper, User Manual

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Installing Nokia MetroHopper outdoor unit
DN99592289 © Nokia Networks Oy 21 (26)
Issue 2-1 en
Caution
3. Adjust the fine alignment bars with a spanner as described in Section 4.5
until you find the minimum AGC voltage value. See Table 1 for
approximate voltage values at different Rx input levels.
4. Lock the fine alignment bars.
5. Tighten the locking screws back to a torque of 17
−
20 Nm. Tighten first
the joint that is closer to the installation pole.
6. Remove the DC voltage meter.
4.9 Uninstalling the outdoor unit
If you need to remove or replace a radio, follow the instructions below. If the
replacement of the radio is done carefully the alignment will not be affected.
Switch the Flexbus OU power supply off (with the node manager) before
removing an outdoor unit.
Table 1. AGC voltage levels in proportion to the receiver input level
Rx input level AGC voltage
0 dBm 0.0 V
-10 dBm 0.5 V
-20 dBm 1.1 V
-30 dBm 1.6 V
-40 dBm 2.2 V
-50 dBm 2.7 V
-60 dBm 3.3 V
-70 dBm 3.8 V
-80 dBm 4.4 V
-90 dBm 5.0 V