Uninstalling The Outdoor Unit - Nokia MetroHopper User Manual

3.
4.
5.
6.
Table 1.
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.
Caution
Switch the Flexbus OU power supply off (with the node manager) before
removing an outdoor unit.
DN99592289 © Nokia Networks Oy
Issue 2-1 en
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.
Lock the fine alignment bars.
Tighten the locking screws back to a torque of 17 − 20 Nm. Tighten first
the joint that is closer to the installation pole.
Remove the DC voltage meter.
AGC voltage levels in proportion to the receiver input level
Rx input level
0 dBm
-10 dBm
-20 dBm
-30 dBm
-40 dBm
-50 dBm
-60 dBm
-70 dBm
-80 dBm
-90 dBm
Installing Nokia MetroHopper outdoor unit
AGC voltage
0.0 V
0.5 V
1.1 V
1.6 V
2.2 V
2.7 V
3.3 V
3.8 V
4.4 V
5.0 V
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